/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-equiv.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 20:36:35,620 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 20:36:35,623 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 20:36:35,651 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 20:36:35,709 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-12 20:36:35,738 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 20:36:35,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 20:36:35,738 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 20:36:35,738 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 20:36:35,740 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 20:36:35,740 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 20:36:35,740 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 20:36:35,741 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 20:36:35,741 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 20:36:35,741 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 20:36:35,741 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 20:36:35,742 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 20:36:35,742 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 20:36:35,742 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 20:36:35,742 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 20:36:35,742 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 20:36:35,742 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 20:36:35,742 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 20:36:35,742 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 20:36:35,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 20:36:35,743 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 20:36:35,743 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 20:36:35,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 20:36:35,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 20:36:35,743 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 20:36:35,743 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 20:36:35,743 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 20:36:35,743 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 20:36:35,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 20:36:35,744 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 20:36:35,744 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 20:36:35,744 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 20:36:35,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 20:36:36,011 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 20:36:36,013 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 20:36:36,014 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 20:36:36,015 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 20:36:36,015 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-equiv.wvr.bpl [2021-06-12 20:36:36,016 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-equiv.wvr.bpl' [2021-06-12 20:36:36,053 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 20:36:36,055 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 20:36:36,065 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 20:36:36,065 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 20:36:36,065 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 20:36:36,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:36:36" (1/1) ... [2021-06-12 20:36:36,081 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:36:36" (1/1) ... [2021-06-12 20:36:36,088 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 20:36:36,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 20:36:36,089 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 20:36:36,089 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 20:36:36,094 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:36:36" (1/1) ... [2021-06-12 20:36:36,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:36:36" (1/1) ... [2021-06-12 20:36:36,096 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:36:36" (1/1) ... [2021-06-12 20:36:36,096 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:36:36" (1/1) ... [2021-06-12 20:36:36,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:36:36" (1/1) ... [2021-06-12 20:36:36,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:36:36" (1/1) ... [2021-06-12 20:36:36,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:36:36" (1/1) ... [2021-06-12 20:36:36,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 20:36:36,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 20:36:36,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 20:36:36,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 20:36:36,105 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:36:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 20:36:36,167 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 20:36:36,167 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 20:36:36,167 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 20:36:36,167 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 20:36:36,168 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 20:36:36,168 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 20:36:36,168 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 20:36:36,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 20:36:36,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 20:36:36,168 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 20:36:36,168 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 20:36:36,168 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 20:36:36,168 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-12 20:36:36,168 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-12 20:36:36,168 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-12 20:36:36,169 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 20:36:36,342 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 20:36:36,342 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-06-12 20:36:36,343 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-12 20:36:36,343 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-06-12 20:36:36,343 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2021-06-12 20:36:36,344 INFO L202 PluginConnector]: Adding new model parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:36:36 BoogieIcfgContainer [2021-06-12 20:36:36,344 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 20:36:36,345 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 20:36:36,345 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 20:36:36,347 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 20:36:36,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:36:36" (1/2) ... [2021-06-12 20:36:36,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20dc5b9a and model type parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 08:36:36, skipping insertion in model container [2021-06-12 20:36:36,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:36:36" (2/2) ... [2021-06-12 20:36:36,349 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-equiv.wvr.bpl [2021-06-12 20:36:36,352 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 20:36:36,352 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 20:36:36,353 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 20:36:36,353 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 20:36:36,394 INFO L149 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2021-06-12 20:36:36,407 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-12 20:36:36,419 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 20:36:36,419 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 20:36:36,419 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 20:36:36,419 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 20:36:36,419 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 20:36:36,419 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 20:36:36,419 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 20:36:36,420 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thread1======== [2021-06-12 20:36:36,426 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 33 transitions, 110 flow [2021-06-12 20:36:36,446 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 105 states, 103 states have (on average 2.9029126213592233) internal successors, (299), 104 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:36,448 INFO L276 IsEmpty]: Start isEmpty. Operand has 105 states, 103 states have (on average 2.9029126213592233) internal successors, (299), 104 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:36,454 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-12 20:36:36,454 INFO L301 ceAbstractionStarter]: Result for error location thread1 was SAFE (1/3) [2021-06-12 20:36:36,455 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-12 20:36:36,457 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 20:36:36,457 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 20:36:36,457 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 20:36:36,458 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 20:36:36,458 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 20:36:36,458 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 20:36:36,458 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 20:36:36,458 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thread1Thread1of1ForFork0======== [2021-06-12 20:36:36,460 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 33 transitions, 110 flow [2021-06-12 20:36:36,469 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 105 states, 103 states have (on average 2.9029126213592233) internal successors, (299), 104 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:36,470 INFO L276 IsEmpty]: Start isEmpty. Operand has 105 states, 103 states have (on average 2.9029126213592233) internal successors, (299), 104 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:36,472 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-12 20:36:36,472 INFO L301 ceAbstractionStarter]: Result for error location thread1Thread1of1ForFork0 was SAFE (2/3) [2021-06-12 20:36:36,472 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 20:36:36,474 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 20:36:36,474 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 20:36:36,474 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 20:36:36,474 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 20:36:36,475 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 20:36:36,475 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 20:36:36,475 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 20:36:36,475 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 20:36:36,477 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 33 transitions, 110 flow [2021-06-12 20:36:36,486 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 105 states, 103 states have (on average 2.9029126213592233) internal successors, (299), 104 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:36,487 INFO L276 IsEmpty]: Start isEmpty. Operand has 105 states, 103 states have (on average 2.9029126213592233) internal successors, (299), 104 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:36,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 20:36:36,489 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:36,490 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:36,490 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:36,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:36,494 INFO L82 PathProgramCache]: Analyzing trace with hash 848381826, now seen corresponding path program 1 times [2021-06-12 20:36:36,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:36,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256332442] [2021-06-12 20:36:36,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:36,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:36,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:36,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:36,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256332442] [2021-06-12 20:36:36,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256332442] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:36:36,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:36:36,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 20:36:36,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270241819] [2021-06-12 20:36:36,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:36:36,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:36,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:36:36,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:36:36,697 INFO L87 Difference]: Start difference. First operand has 105 states, 103 states have (on average 2.9029126213592233) internal successors, (299), 104 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:36,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:36,782 INFO L93 Difference]: Finished difference Result 253 states and 745 transitions. [2021-06-12 20:36:36,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 20:36:36,785 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 20:36:36,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:36,794 INFO L225 Difference]: With dead ends: 253 [2021-06-12 20:36:36,795 INFO L226 Difference]: Without dead ends: 247 [2021-06-12 20:36:36,796 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:36:36,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-06-12 20:36:36,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 143. [2021-06-12 20:36:36,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.936619718309859) internal successors, (417), 142 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:36,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 417 transitions. [2021-06-12 20:36:36,855 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 417 transitions. Word has length 16 [2021-06-12 20:36:36,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:36,856 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 417 transitions. [2021-06-12 20:36:36,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:36,856 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 417 transitions. [2021-06-12 20:36:36,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 20:36:36,861 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:36,861 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:36,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 20:36:36,862 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:36,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:36,863 INFO L82 PathProgramCache]: Analyzing trace with hash 890214852, now seen corresponding path program 2 times [2021-06-12 20:36:36,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:36,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149035085] [2021-06-12 20:36:36,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:36,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:36,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:36,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149035085] [2021-06-12 20:36:36,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149035085] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:36:36,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:36:36,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 20:36:36,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414522678] [2021-06-12 20:36:36,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:36:36,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:36,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:36:36,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:36:36,939 INFO L87 Difference]: Start difference. First operand 143 states and 417 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:36,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:36,994 INFO L93 Difference]: Finished difference Result 262 states and 765 transitions. [2021-06-12 20:36:36,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 20:36:36,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 20:36:36,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:37,001 INFO L225 Difference]: With dead ends: 262 [2021-06-12 20:36:37,001 INFO L226 Difference]: Without dead ends: 256 [2021-06-12 20:36:37,002 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:36:37,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-06-12 20:36:37,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 145. [2021-06-12 20:36:37,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.923611111111111) internal successors, (421), 144 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:37,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 421 transitions. [2021-06-12 20:36:37,010 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 421 transitions. Word has length 16 [2021-06-12 20:36:37,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:37,010 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 421 transitions. [2021-06-12 20:36:37,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:37,011 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 421 transitions. [2021-06-12 20:36:37,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:36:37,012 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:37,012 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:37,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 20:36:37,012 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:37,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:37,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1702344252, now seen corresponding path program 1 times [2021-06-12 20:36:37,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:37,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084982372] [2021-06-12 20:36:37,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:37,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:37,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:37,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:37,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084982372] [2021-06-12 20:36:37,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084982372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:37,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336690067] [2021-06-12 20:36:37,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:37,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:37,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 20:36:37,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:37,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336690067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:37,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:37,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-12 20:36:37,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362721120] [2021-06-12 20:36:37,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:36:37,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:37,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:36:37,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:36:37,208 INFO L87 Difference]: Start difference. First operand 145 states and 421 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:37,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:37,251 INFO L93 Difference]: Finished difference Result 199 states and 578 transitions. [2021-06-12 20:36:37,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:36:37,252 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 20:36:37,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:37,253 INFO L225 Difference]: With dead ends: 199 [2021-06-12 20:36:37,253 INFO L226 Difference]: Without dead ends: 199 [2021-06-12 20:36:37,254 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:36:37,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-12 20:36:37,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 149. [2021-06-12 20:36:37,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 3.0067567567567566) internal successors, (445), 148 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:37,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 445 transitions. [2021-06-12 20:36:37,262 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 445 transitions. Word has length 18 [2021-06-12 20:36:37,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:37,262 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 445 transitions. [2021-06-12 20:36:37,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:37,263 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 445 transitions. [2021-06-12 20:36:37,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:36:37,264 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:37,264 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:37,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-12 20:36:37,483 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:37,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:37,484 INFO L82 PathProgramCache]: Analyzing trace with hash -735916285, now seen corresponding path program 1 times [2021-06-12 20:36:37,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:37,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665368480] [2021-06-12 20:36:37,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:37,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:37,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:37,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665368480] [2021-06-12 20:36:37,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665368480] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:36:37,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:36:37,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:36:37,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260130592] [2021-06-12 20:36:37,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:36:37,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:37,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:36:37,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:36:37,574 INFO L87 Difference]: Start difference. First operand 149 states and 445 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:37,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:37,639 INFO L93 Difference]: Finished difference Result 246 states and 702 transitions. [2021-06-12 20:36:37,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:36:37,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 20:36:37,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:37,641 INFO L225 Difference]: With dead ends: 246 [2021-06-12 20:36:37,641 INFO L226 Difference]: Without dead ends: 214 [2021-06-12 20:36:37,641 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:36:37,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-06-12 20:36:37,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 164. [2021-06-12 20:36:37,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.901840490797546) internal successors, (473), 163 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:37,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 473 transitions. [2021-06-12 20:36:37,675 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 473 transitions. Word has length 18 [2021-06-12 20:36:37,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:37,675 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 473 transitions. [2021-06-12 20:36:37,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:37,675 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 473 transitions. [2021-06-12 20:36:37,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:36:37,676 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:37,676 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:37,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 20:36:37,676 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:37,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:37,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1382578898, now seen corresponding path program 1 times [2021-06-12 20:36:37,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:37,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63205104] [2021-06-12 20:36:37,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:37,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:37,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:37,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:37,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63205104] [2021-06-12 20:36:37,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63205104] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:36:37,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:36:37,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:36:37,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298221703] [2021-06-12 20:36:37,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 20:36:37,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:37,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 20:36:37,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:36:37,705 INFO L87 Difference]: Start difference. First operand 164 states and 473 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:37,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:37,716 INFO L93 Difference]: Finished difference Result 153 states and 416 transitions. [2021-06-12 20:36:37,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 20:36:37,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 20:36:37,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:37,717 INFO L225 Difference]: With dead ends: 153 [2021-06-12 20:36:37,717 INFO L226 Difference]: Without dead ends: 137 [2021-06-12 20:36:37,718 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:36:37,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-12 20:36:37,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2021-06-12 20:36:37,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.7954545454545454) internal successors, (369), 132 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:37,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 369 transitions. [2021-06-12 20:36:37,723 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 369 transitions. Word has length 18 [2021-06-12 20:36:37,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:37,723 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 369 transitions. [2021-06-12 20:36:37,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:37,723 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 369 transitions. [2021-06-12 20:36:37,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:36:37,724 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:37,724 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:37,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 20:36:37,724 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:37,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:37,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1747969668, now seen corresponding path program 2 times [2021-06-12 20:36:37,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:37,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576195096] [2021-06-12 20:36:37,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:37,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:37,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:37,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:37,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576195096] [2021-06-12 20:36:37,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576195096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:37,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531477738] [2021-06-12 20:36:37,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:37,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:36:37,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:37,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 20:36:37,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:37,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:37,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531477738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:37,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:37,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 20:36:37,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813551872] [2021-06-12 20:36:37,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:36:37,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:37,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:36:37,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:36:37,889 INFO L87 Difference]: Start difference. First operand 133 states and 369 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:37,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:37,928 INFO L93 Difference]: Finished difference Result 205 states and 550 transitions. [2021-06-12 20:36:37,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:36:37,929 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 20:36:37,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:37,930 INFO L225 Difference]: With dead ends: 205 [2021-06-12 20:36:37,930 INFO L226 Difference]: Without dead ends: 205 [2021-06-12 20:36:37,930 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:36:37,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-12 20:36:37,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 136. [2021-06-12 20:36:37,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.837037037037037) internal successors, (383), 135 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:37,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 383 transitions. [2021-06-12 20:36:37,935 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 383 transitions. Word has length 18 [2021-06-12 20:36:37,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:37,935 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 383 transitions. [2021-06-12 20:36:37,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:37,935 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 383 transitions. [2021-06-12 20:36:37,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:36:37,936 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:37,936 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:38,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:38,141 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:38,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:38,142 INFO L82 PathProgramCache]: Analyzing trace with hash -141666181, now seen corresponding path program 2 times [2021-06-12 20:36:38,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:38,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098230140] [2021-06-12 20:36:38,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:38,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:38,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:38,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:38,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098230140] [2021-06-12 20:36:38,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098230140] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:36:38,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:36:38,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:36:38,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249521547] [2021-06-12 20:36:38,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:36:38,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:38,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:36:38,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:36:38,163 INFO L87 Difference]: Start difference. First operand 136 states and 383 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:38,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:38,248 INFO L93 Difference]: Finished difference Result 253 states and 641 transitions. [2021-06-12 20:36:38,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:36:38,248 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 20:36:38,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:38,250 INFO L225 Difference]: With dead ends: 253 [2021-06-12 20:36:38,250 INFO L226 Difference]: Without dead ends: 244 [2021-06-12 20:36:38,250 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:36:38,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-12 20:36:38,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 160. [2021-06-12 20:36:38,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.811320754716981) internal successors, (447), 159 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:38,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 447 transitions. [2021-06-12 20:36:38,255 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 447 transitions. Word has length 18 [2021-06-12 20:36:38,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:38,255 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 447 transitions. [2021-06-12 20:36:38,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:38,255 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 447 transitions. [2021-06-12 20:36:38,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:36:38,256 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:38,256 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:38,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-12 20:36:38,256 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:38,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:38,257 INFO L82 PathProgramCache]: Analyzing trace with hash -2044687976, now seen corresponding path program 3 times [2021-06-12 20:36:38,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:38,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578090849] [2021-06-12 20:36:38,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:38,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:38,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:38,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578090849] [2021-06-12 20:36:38,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578090849] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:36:38,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:36:38,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:36:38,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733294439] [2021-06-12 20:36:38,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:36:38,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:38,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:36:38,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:36:38,276 INFO L87 Difference]: Start difference. First operand 160 states and 447 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:38,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:38,317 INFO L93 Difference]: Finished difference Result 211 states and 560 transitions. [2021-06-12 20:36:38,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:36:38,318 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 20:36:38,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:38,319 INFO L225 Difference]: With dead ends: 211 [2021-06-12 20:36:38,319 INFO L226 Difference]: Without dead ends: 208 [2021-06-12 20:36:38,319 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:36:38,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-12 20:36:38,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 160. [2021-06-12 20:36:38,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.792452830188679) internal successors, (444), 159 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:38,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 444 transitions. [2021-06-12 20:36:38,323 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 444 transitions. Word has length 18 [2021-06-12 20:36:38,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:38,323 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 444 transitions. [2021-06-12 20:36:38,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:38,323 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 444 transitions. [2021-06-12 20:36:38,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:36:38,324 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:38,324 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:38,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-12 20:36:38,324 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:38,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:38,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1877852891, now seen corresponding path program 3 times [2021-06-12 20:36:38,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:38,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926993542] [2021-06-12 20:36:38,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:38,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:38,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:38,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926993542] [2021-06-12 20:36:38,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926993542] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:36:38,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:36:38,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:36:38,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984004589] [2021-06-12 20:36:38,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:36:38,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:38,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:36:38,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:36:38,343 INFO L87 Difference]: Start difference. First operand 160 states and 444 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:38,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:38,380 INFO L93 Difference]: Finished difference Result 190 states and 515 transitions. [2021-06-12 20:36:38,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:36:38,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 20:36:38,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:38,381 INFO L225 Difference]: With dead ends: 190 [2021-06-12 20:36:38,382 INFO L226 Difference]: Without dead ends: 190 [2021-06-12 20:36:38,382 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:36:38,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-12 20:36:38,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 142. [2021-06-12 20:36:38,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.8085106382978724) internal successors, (396), 141 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:38,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 396 transitions. [2021-06-12 20:36:38,385 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 396 transitions. Word has length 18 [2021-06-12 20:36:38,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:38,386 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 396 transitions. [2021-06-12 20:36:38,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:38,386 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 396 transitions. [2021-06-12 20:36:38,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:36:38,386 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:38,386 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:38,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-12 20:36:38,387 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:38,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:38,387 INFO L82 PathProgramCache]: Analyzing trace with hash -663824830, now seen corresponding path program 4 times [2021-06-12 20:36:38,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:38,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557893283] [2021-06-12 20:36:38,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:38,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:38,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:38,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:38,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557893283] [2021-06-12 20:36:38,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557893283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:38,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229102031] [2021-06-12 20:36:38,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:38,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:36:38,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:38,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 20:36:38,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:38,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:38,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229102031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:38,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:38,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 20:36:38,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722071418] [2021-06-12 20:36:38,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:36:38,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:38,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:36:38,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:36:38,544 INFO L87 Difference]: Start difference. First operand 142 states and 396 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:38,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:38,583 INFO L93 Difference]: Finished difference Result 193 states and 511 transitions. [2021-06-12 20:36:38,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:36:38,583 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 20:36:38,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:38,584 INFO L225 Difference]: With dead ends: 193 [2021-06-12 20:36:38,584 INFO L226 Difference]: Without dead ends: 193 [2021-06-12 20:36:38,585 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:36:38,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-12 20:36:38,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2021-06-12 20:36:38,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.8085106382978724) internal successors, (396), 141 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:38,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 396 transitions. [2021-06-12 20:36:38,590 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 396 transitions. Word has length 18 [2021-06-12 20:36:38,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:38,590 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 396 transitions. [2021-06-12 20:36:38,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:38,590 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 396 transitions. [2021-06-12 20:36:38,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:36:38,591 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:38,591 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:38,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-12 20:36:38,805 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:38,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:38,805 INFO L82 PathProgramCache]: Analyzing trace with hash 810916037, now seen corresponding path program 4 times [2021-06-12 20:36:38,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:38,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600773215] [2021-06-12 20:36:38,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:38,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:38,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:38,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600773215] [2021-06-12 20:36:38,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600773215] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:36:38,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:36:38,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:36:38,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009077057] [2021-06-12 20:36:38,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:36:38,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:38,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:36:38,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:36:38,825 INFO L87 Difference]: Start difference. First operand 142 states and 396 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:38,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:38,874 INFO L93 Difference]: Finished difference Result 197 states and 512 transitions. [2021-06-12 20:36:38,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:36:38,875 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 20:36:38,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:38,877 INFO L225 Difference]: With dead ends: 197 [2021-06-12 20:36:38,878 INFO L226 Difference]: Without dead ends: 188 [2021-06-12 20:36:38,878 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:36:38,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-12 20:36:38,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 164. [2021-06-12 20:36:38,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.791411042944785) internal successors, (455), 163 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:38,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 455 transitions. [2021-06-12 20:36:38,882 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 455 transitions. Word has length 18 [2021-06-12 20:36:38,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:38,882 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 455 transitions. [2021-06-12 20:36:38,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:38,882 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 455 transitions. [2021-06-12 20:36:38,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:36:38,883 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:38,883 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:38,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-12 20:36:38,883 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:38,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:38,883 INFO L82 PathProgramCache]: Analyzing trace with hash -951885686, now seen corresponding path program 5 times [2021-06-12 20:36:38,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:38,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815442678] [2021-06-12 20:36:38,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:38,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:38,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:38,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:38,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815442678] [2021-06-12 20:36:38,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815442678] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:36:38,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:36:38,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:36:38,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626019194] [2021-06-12 20:36:38,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:36:38,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:38,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:36:38,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:36:38,906 INFO L87 Difference]: Start difference. First operand 164 states and 455 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:38,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:38,963 INFO L93 Difference]: Finished difference Result 248 states and 641 transitions. [2021-06-12 20:36:38,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:36:38,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 20:36:38,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:38,964 INFO L225 Difference]: With dead ends: 248 [2021-06-12 20:36:38,964 INFO L226 Difference]: Without dead ends: 245 [2021-06-12 20:36:38,964 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:36:38,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-12 20:36:38,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 164. [2021-06-12 20:36:38,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.773006134969325) internal successors, (452), 163 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:38,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 452 transitions. [2021-06-12 20:36:38,969 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 452 transitions. Word has length 18 [2021-06-12 20:36:38,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:38,969 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 452 transitions. [2021-06-12 20:36:38,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:38,970 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 452 transitions. [2021-06-12 20:36:38,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:36:38,971 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:38,971 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:38,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-12 20:36:38,971 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:38,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:38,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1324312115, now seen corresponding path program 5 times [2021-06-12 20:36:38,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:38,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084037695] [2021-06-12 20:36:38,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:38,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:39,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:39,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:39,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084037695] [2021-06-12 20:36:39,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084037695] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:36:39,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:36:39,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:36:39,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575334064] [2021-06-12 20:36:39,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:36:39,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:39,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:36:39,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:36:39,008 INFO L87 Difference]: Start difference. First operand 164 states and 452 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:39,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:39,043 INFO L93 Difference]: Finished difference Result 190 states and 503 transitions. [2021-06-12 20:36:39,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:36:39,043 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 20:36:39,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:39,045 INFO L225 Difference]: With dead ends: 190 [2021-06-12 20:36:39,045 INFO L226 Difference]: Without dead ends: 190 [2021-06-12 20:36:39,045 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:36:39,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-12 20:36:39,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 161. [2021-06-12 20:36:39,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.775) internal successors, (444), 160 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:39,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 444 transitions. [2021-06-12 20:36:39,049 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 444 transitions. Word has length 18 [2021-06-12 20:36:39,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:39,049 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 444 transitions. [2021-06-12 20:36:39,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:39,049 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 444 transitions. [2021-06-12 20:36:39,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:36:39,050 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:39,050 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:39,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-12 20:36:39,051 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:39,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:39,052 INFO L82 PathProgramCache]: Analyzing trace with hash 11936556, now seen corresponding path program 6 times [2021-06-12 20:36:39,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:39,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231680341] [2021-06-12 20:36:39,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:39,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:39,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:39,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:39,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231680341] [2021-06-12 20:36:39,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231680341] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:36:39,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:36:39,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:36:39,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251019282] [2021-06-12 20:36:39,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:36:39,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:39,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:36:39,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:36:39,083 INFO L87 Difference]: Start difference. First operand 161 states and 444 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:39,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:39,125 INFO L93 Difference]: Finished difference Result 164 states and 446 transitions. [2021-06-12 20:36:39,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:36:39,125 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 20:36:39,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:39,126 INFO L225 Difference]: With dead ends: 164 [2021-06-12 20:36:39,126 INFO L226 Difference]: Without dead ends: 160 [2021-06-12 20:36:39,126 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:36:39,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-12 20:36:39,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-06-12 20:36:39,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.779874213836478) internal successors, (442), 159 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:39,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 442 transitions. [2021-06-12 20:36:39,129 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 442 transitions. Word has length 18 [2021-06-12 20:36:39,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:39,129 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 442 transitions. [2021-06-12 20:36:39,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:39,129 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 442 transitions. [2021-06-12 20:36:39,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:36:39,130 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:39,130 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:39,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-12 20:36:39,130 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:39,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:39,131 INFO L82 PathProgramCache]: Analyzing trace with hash 459545933, now seen corresponding path program 6 times [2021-06-12 20:36:39,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:39,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817097848] [2021-06-12 20:36:39,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:39,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:39,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:39,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817097848] [2021-06-12 20:36:39,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817097848] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:36:39,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:36:39,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:36:39,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382336587] [2021-06-12 20:36:39,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:36:39,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:39,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:36:39,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:36:39,153 INFO L87 Difference]: Start difference. First operand 160 states and 442 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:39,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:39,184 INFO L93 Difference]: Finished difference Result 153 states and 422 transitions. [2021-06-12 20:36:39,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:36:39,184 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 20:36:39,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:39,185 INFO L225 Difference]: With dead ends: 153 [2021-06-12 20:36:39,185 INFO L226 Difference]: Without dead ends: 153 [2021-06-12 20:36:39,186 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:36:39,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-12 20:36:39,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 135. [2021-06-12 20:36:39,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.791044776119403) internal successors, (374), 134 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:39,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 374 transitions. [2021-06-12 20:36:39,189 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 374 transitions. Word has length 18 [2021-06-12 20:36:39,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:39,189 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 374 transitions. [2021-06-12 20:36:39,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:39,190 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 374 transitions. [2021-06-12 20:36:39,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:36:39,190 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:39,190 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:39,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-12 20:36:39,190 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:39,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:39,191 INFO L82 PathProgramCache]: Analyzing trace with hash 442648773, now seen corresponding path program 1 times [2021-06-12 20:36:39,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:39,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860960217] [2021-06-12 20:36:39,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:39,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:39,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:39,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860960217] [2021-06-12 20:36:39,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860960217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:39,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660632290] [2021-06-12 20:36:39,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:39,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:39,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:36:39,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:39,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-12 20:36:39,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:39,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:39,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:39,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:10 [2021-06-12 20:36:39,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:39,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660632290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:39,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:39,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-12 20:36:39,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452693399] [2021-06-12 20:36:39,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:36:39,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:39,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:36:39,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:36:39,510 INFO L87 Difference]: Start difference. First operand 135 states and 374 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:39,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:39,860 INFO L93 Difference]: Finished difference Result 382 states and 1086 transitions. [2021-06-12 20:36:39,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:36:39,860 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:36:39,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:39,862 INFO L225 Difference]: With dead ends: 382 [2021-06-12 20:36:39,862 INFO L226 Difference]: Without dead ends: 372 [2021-06-12 20:36:39,862 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 209.3ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:36:39,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-06-12 20:36:39,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 186. [2021-06-12 20:36:39,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.8162162162162163) internal successors, (521), 185 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:39,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 521 transitions. [2021-06-12 20:36:39,868 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 521 transitions. Word has length 20 [2021-06-12 20:36:39,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:39,869 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 521 transitions. [2021-06-12 20:36:39,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:39,869 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 521 transitions. [2021-06-12 20:36:39,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:36:39,870 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:39,870 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:40,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:40,085 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:40,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:40,085 INFO L82 PathProgramCache]: Analyzing trace with hash 600946541, now seen corresponding path program 2 times [2021-06-12 20:36:40,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:40,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908305096] [2021-06-12 20:36:40,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:40,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:40,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908305096] [2021-06-12 20:36:40,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908305096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:40,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137864955] [2021-06-12 20:36:40,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:40,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:36:40,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:40,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:36:40,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:40,397 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:40,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:36:40,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:36:40,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:40,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:40,417 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-06-12 20:36:40,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:40,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137864955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:40,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:40,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 20:36:40,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814850287] [2021-06-12 20:36:40,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:36:40,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:40,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:36:40,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:36:40,479 INFO L87 Difference]: Start difference. First operand 186 states and 521 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:41,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:41,330 INFO L93 Difference]: Finished difference Result 399 states and 1155 transitions. [2021-06-12 20:36:41,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:36:41,331 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:36:41,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:41,332 INFO L225 Difference]: With dead ends: 399 [2021-06-12 20:36:41,332 INFO L226 Difference]: Without dead ends: 389 [2021-06-12 20:36:41,333 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 662.9ms TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:36:41,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-12 20:36:41,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 189. [2021-06-12 20:36:41,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.8191489361702127) internal successors, (530), 188 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:41,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 530 transitions. [2021-06-12 20:36:41,341 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 530 transitions. Word has length 20 [2021-06-12 20:36:41,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:41,341 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 530 transitions. [2021-06-12 20:36:41,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:41,342 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 530 transitions. [2021-06-12 20:36:41,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:36:41,342 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:41,342 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:41,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-12 20:36:41,557 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:41,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:41,557 INFO L82 PathProgramCache]: Analyzing trace with hash 424405109, now seen corresponding path program 3 times [2021-06-12 20:36:41,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:41,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942879162] [2021-06-12 20:36:41,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:41,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:41,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:41,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:41,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942879162] [2021-06-12 20:36:41,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942879162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:41,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002617163] [2021-06-12 20:36:41,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:41,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:36:41,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:41,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:36:41,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:41,754 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:41,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:36:41,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:36:41,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:41,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:41,764 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:36:41,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:41,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002617163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:41,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:41,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 20:36:41,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511809929] [2021-06-12 20:36:41,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:36:41,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:41,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:36:41,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:36:41,897 INFO L87 Difference]: Start difference. First operand 189 states and 530 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:42,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:42,648 INFO L93 Difference]: Finished difference Result 363 states and 1048 transitions. [2021-06-12 20:36:42,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:36:42,648 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:36:42,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:42,649 INFO L225 Difference]: With dead ends: 363 [2021-06-12 20:36:42,650 INFO L226 Difference]: Without dead ends: 353 [2021-06-12 20:36:42,650 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 611.4ms TimeCoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:36:42,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-12 20:36:42,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 192. [2021-06-12 20:36:42,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.8219895287958114) internal successors, (539), 191 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:42,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 539 transitions. [2021-06-12 20:36:42,655 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 539 transitions. Word has length 20 [2021-06-12 20:36:42,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:42,655 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 539 transitions. [2021-06-12 20:36:42,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:42,655 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 539 transitions. [2021-06-12 20:36:42,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:36:42,656 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:42,656 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:42,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:42,875 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:42,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:42,875 INFO L82 PathProgramCache]: Analyzing trace with hash -409333331, now seen corresponding path program 4 times [2021-06-12 20:36:42,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:42,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560140999] [2021-06-12 20:36:42,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:42,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:42,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:42,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:42,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560140999] [2021-06-12 20:36:42,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560140999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:42,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158995541] [2021-06-12 20:36:42,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:43,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:36:43,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:43,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:36:43,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:43,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:43,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:36:43,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:43,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:43,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:43,115 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:36:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:43,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158995541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:43,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:43,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:36:43,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266475724] [2021-06-12 20:36:43,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:36:43,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:43,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:36:43,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:36:43,160 INFO L87 Difference]: Start difference. First operand 192 states and 539 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:43,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:43,596 INFO L93 Difference]: Finished difference Result 310 states and 882 transitions. [2021-06-12 20:36:43,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:36:43,597 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:36:43,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:43,598 INFO L225 Difference]: With dead ends: 310 [2021-06-12 20:36:43,598 INFO L226 Difference]: Without dead ends: 298 [2021-06-12 20:36:43,598 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 311.2ms TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:36:43,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-06-12 20:36:43,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 210. [2021-06-12 20:36:43,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.875598086124402) internal successors, (601), 209 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:43,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 601 transitions. [2021-06-12 20:36:43,602 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 601 transitions. Word has length 20 [2021-06-12 20:36:43,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:43,602 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 601 transitions. [2021-06-12 20:36:43,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:43,603 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 601 transitions. [2021-06-12 20:36:43,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:36:43,603 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:43,603 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:43,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:43,804 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:43,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:43,804 INFO L82 PathProgramCache]: Analyzing trace with hash -908838833, now seen corresponding path program 1 times [2021-06-12 20:36:43,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:43,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48932511] [2021-06-12 20:36:43,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:43,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:43,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:43,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:43,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48932511] [2021-06-12 20:36:43,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48932511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:43,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226768551] [2021-06-12 20:36:43,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:43,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:43,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:36:43,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:43,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-12 20:36:43,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:43,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:43,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:43,984 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:10 [2021-06-12 20:36:44,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:44,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226768551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:44,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:44,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-12 20:36:44,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107676528] [2021-06-12 20:36:44,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:36:44,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:44,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:36:44,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:36:44,017 INFO L87 Difference]: Start difference. First operand 210 states and 601 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:44,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:44,360 INFO L93 Difference]: Finished difference Result 423 states and 1216 transitions. [2021-06-12 20:36:44,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:36:44,360 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:36:44,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:44,362 INFO L225 Difference]: With dead ends: 423 [2021-06-12 20:36:44,362 INFO L226 Difference]: Without dead ends: 414 [2021-06-12 20:36:44,362 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 172.7ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:36:44,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-12 20:36:44,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 216. [2021-06-12 20:36:44,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.8883720930232557) internal successors, (621), 215 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:44,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 621 transitions. [2021-06-12 20:36:44,367 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 621 transitions. Word has length 20 [2021-06-12 20:36:44,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:44,367 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 621 transitions. [2021-06-12 20:36:44,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:44,367 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 621 transitions. [2021-06-12 20:36:44,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:36:44,367 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:44,367 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:44,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-12 20:36:44,584 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:44,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:44,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1199871497, now seen corresponding path program 2 times [2021-06-12 20:36:44,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:44,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071468602] [2021-06-12 20:36:44,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:44,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:44,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:44,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:44,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071468602] [2021-06-12 20:36:44,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071468602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:44,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380572913] [2021-06-12 20:36:44,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:44,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:36:44,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:44,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:36:44,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:44,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:44,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-12 20:36:44,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:44,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:44,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:44,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:36:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:44,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380572913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:44,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:44,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:36:44,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798794041] [2021-06-12 20:36:44,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:36:44,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:44,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:36:44,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:36:44,860 INFO L87 Difference]: Start difference. First operand 216 states and 621 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:45,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:45,133 INFO L93 Difference]: Finished difference Result 332 states and 961 transitions. [2021-06-12 20:36:45,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:36:45,133 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:36:45,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:45,135 INFO L225 Difference]: With dead ends: 332 [2021-06-12 20:36:45,135 INFO L226 Difference]: Without dead ends: 323 [2021-06-12 20:36:45,136 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 195.5ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:36:45,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-12 20:36:45,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 219. [2021-06-12 20:36:45,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.8944954128440368) internal successors, (631), 218 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:45,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 631 transitions. [2021-06-12 20:36:45,141 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 631 transitions. Word has length 20 [2021-06-12 20:36:45,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:45,141 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 631 transitions. [2021-06-12 20:36:45,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:45,141 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 631 transitions. [2021-06-12 20:36:45,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:36:45,142 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:45,142 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:45,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:45,359 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:45,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:45,359 INFO L82 PathProgramCache]: Analyzing trace with hash 2066945939, now seen corresponding path program 3 times [2021-06-12 20:36:45,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:45,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160020585] [2021-06-12 20:36:45,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:45,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:45,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:45,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:45,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160020585] [2021-06-12 20:36:45,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160020585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:45,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072494066] [2021-06-12 20:36:45,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:45,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:36:45,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:45,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:36:45,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:45,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:45,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:36:45,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:36:45,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:45,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:45,545 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-06-12 20:36:45,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:45,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072494066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:45,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:45,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 20:36:45,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175937099] [2021-06-12 20:36:45,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:36:45,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:45,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:36:45,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:36:45,660 INFO L87 Difference]: Start difference. First operand 219 states and 631 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:46,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:46,153 INFO L93 Difference]: Finished difference Result 343 states and 998 transitions. [2021-06-12 20:36:46,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:36:46,153 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:36:46,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:46,154 INFO L225 Difference]: With dead ends: 343 [2021-06-12 20:36:46,154 INFO L226 Difference]: Without dead ends: 334 [2021-06-12 20:36:46,155 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 391.3ms TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:36:46,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-06-12 20:36:46,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 222. [2021-06-12 20:36:46,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.9004524886877827) internal successors, (641), 221 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:46,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 641 transitions. [2021-06-12 20:36:46,159 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 641 transitions. Word has length 20 [2021-06-12 20:36:46,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:46,159 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 641 transitions. [2021-06-12 20:36:46,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:46,159 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 641 transitions. [2021-06-12 20:36:46,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:36:46,159 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:46,160 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:46,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:46,360 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:46,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:46,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1904435179, now seen corresponding path program 4 times [2021-06-12 20:36:46,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:46,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108449962] [2021-06-12 20:36:46,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:46,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:46,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:46,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108449962] [2021-06-12 20:36:46,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108449962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:46,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587169586] [2021-06-12 20:36:46,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:46,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:36:46,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:46,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:36:46,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:46,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:46,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:36:46,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:46,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:46,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:46,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:36:46,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:46,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587169586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:46,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:46,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:36:46,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768946028] [2021-06-12 20:36:46,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:36:46,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:46,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:36:46,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:36:46,578 INFO L87 Difference]: Start difference. First operand 222 states and 641 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:46,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:46,833 INFO L93 Difference]: Finished difference Result 318 states and 927 transitions. [2021-06-12 20:36:46,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:36:46,834 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:36:46,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:46,835 INFO L225 Difference]: With dead ends: 318 [2021-06-12 20:36:46,835 INFO L226 Difference]: Without dead ends: 307 [2021-06-12 20:36:46,835 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 174.1ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:36:46,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-06-12 20:36:46,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 224. [2021-06-12 20:36:46,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.905829596412556) internal successors, (648), 223 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:46,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 648 transitions. [2021-06-12 20:36:46,839 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 648 transitions. Word has length 20 [2021-06-12 20:36:46,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:46,839 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 648 transitions. [2021-06-12 20:36:46,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:46,840 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 648 transitions. [2021-06-12 20:36:46,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:36:46,840 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:46,840 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:47,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-12 20:36:47,057 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:47,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:47,057 INFO L82 PathProgramCache]: Analyzing trace with hash -453703043, now seen corresponding path program 5 times [2021-06-12 20:36:47,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:47,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822762642] [2021-06-12 20:36:47,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:47,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:47,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:47,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:47,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822762642] [2021-06-12 20:36:47,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822762642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:47,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201519569] [2021-06-12 20:36:47,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:47,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:36:47,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:47,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:36:47,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:47,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:47,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-12 20:36:47,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:47,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:47,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:47,296 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:36:47,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:47,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201519569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:47,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:47,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:36:47,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305699583] [2021-06-12 20:36:47,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:36:47,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:47,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:36:47,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:36:47,321 INFO L87 Difference]: Start difference. First operand 224 states and 648 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:47,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:47,570 INFO L93 Difference]: Finished difference Result 328 states and 946 transitions. [2021-06-12 20:36:47,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:36:47,571 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:36:47,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:47,572 INFO L225 Difference]: With dead ends: 328 [2021-06-12 20:36:47,572 INFO L226 Difference]: Without dead ends: 318 [2021-06-12 20:36:47,572 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 176.6ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:36:47,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-12 20:36:47,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 224. [2021-06-12 20:36:47,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.905829596412556) internal successors, (648), 223 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:47,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 648 transitions. [2021-06-12 20:36:47,576 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 648 transitions. Word has length 20 [2021-06-12 20:36:47,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:47,577 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 648 transitions. [2021-06-12 20:36:47,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:47,577 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 648 transitions. [2021-06-12 20:36:47,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:36:47,577 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:47,577 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:47,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:47,793 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:47,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:47,793 INFO L82 PathProgramCache]: Analyzing trace with hash -236278157, now seen corresponding path program 6 times [2021-06-12 20:36:47,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:47,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173889992] [2021-06-12 20:36:47,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:47,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:47,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:47,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173889992] [2021-06-12 20:36:47,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173889992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:47,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604747976] [2021-06-12 20:36:47,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:47,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:36:47,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:47,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:36:47,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:47,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:47,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:36:47,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:36:47,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:47,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:47,986 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:36:48,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:48,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604747976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:48,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:48,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 20:36:48,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73234779] [2021-06-12 20:36:48,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:36:48,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:48,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:36:48,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:36:48,084 INFO L87 Difference]: Start difference. First operand 224 states and 648 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:48,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:48,857 INFO L93 Difference]: Finished difference Result 462 states and 1347 transitions. [2021-06-12 20:36:48,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:36:48,857 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:36:48,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:48,859 INFO L225 Difference]: With dead ends: 462 [2021-06-12 20:36:48,859 INFO L226 Difference]: Without dead ends: 442 [2021-06-12 20:36:48,859 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 637.7ms TimeCoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:36:48,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-06-12 20:36:48,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 235. [2021-06-12 20:36:48,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.965811965811966) internal successors, (694), 234 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:48,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 694 transitions. [2021-06-12 20:36:48,871 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 694 transitions. Word has length 20 [2021-06-12 20:36:48,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:48,871 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 694 transitions. [2021-06-12 20:36:48,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:48,872 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 694 transitions. [2021-06-12 20:36:48,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:36:48,872 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:48,872 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:49,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-12 20:36:49,077 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:49,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:49,077 INFO L82 PathProgramCache]: Analyzing trace with hash 188465799, now seen corresponding path program 5 times [2021-06-12 20:36:49,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:49,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344391085] [2021-06-12 20:36:49,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:49,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:49,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344391085] [2021-06-12 20:36:49,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344391085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:49,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055458570] [2021-06-12 20:36:49,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:49,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:36:49,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:49,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:36:49,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:49,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:49,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-12 20:36:49,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:49,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:49,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:49,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:36:49,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:49,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055458570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:49,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:49,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:36:49,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761468675] [2021-06-12 20:36:49,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:36:49,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:49,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:36:49,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:36:49,312 INFO L87 Difference]: Start difference. First operand 235 states and 694 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:49,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:49,457 INFO L93 Difference]: Finished difference Result 327 states and 955 transitions. [2021-06-12 20:36:49,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:36:49,457 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:36:49,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:49,458 INFO L225 Difference]: With dead ends: 327 [2021-06-12 20:36:49,458 INFO L226 Difference]: Without dead ends: 318 [2021-06-12 20:36:49,458 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 150.3ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:36:49,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-12 20:36:49,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 238. [2021-06-12 20:36:49,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.970464135021097) internal successors, (704), 237 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:49,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 704 transitions. [2021-06-12 20:36:49,462 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 704 transitions. Word has length 20 [2021-06-12 20:36:49,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:49,462 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 704 transitions. [2021-06-12 20:36:49,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:49,462 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 704 transitions. [2021-06-12 20:36:49,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:36:49,463 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:49,463 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:49,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:49,677 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:49,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:49,677 INFO L82 PathProgramCache]: Analyzing trace with hash -839684061, now seen corresponding path program 6 times [2021-06-12 20:36:49,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:49,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136307468] [2021-06-12 20:36:49,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:49,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:49,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:49,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:49,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136307468] [2021-06-12 20:36:49,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136307468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:49,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306686171] [2021-06-12 20:36:49,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:49,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:36:49,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:49,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:36:49,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:49,817 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:49,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:36:49,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:36:49,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:49,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:49,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-06-12 20:36:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:49,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306686171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:49,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:49,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 20:36:49,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655511773] [2021-06-12 20:36:49,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:36:49,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:49,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:36:49,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:36:49,928 INFO L87 Difference]: Start difference. First operand 238 states and 704 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:50,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:50,347 INFO L93 Difference]: Finished difference Result 341 states and 1001 transitions. [2021-06-12 20:36:50,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:36:50,347 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:36:50,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:50,348 INFO L225 Difference]: With dead ends: 341 [2021-06-12 20:36:50,348 INFO L226 Difference]: Without dead ends: 332 [2021-06-12 20:36:50,348 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 416.6ms TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:36:50,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-12 20:36:50,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 241. [2021-06-12 20:36:50,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.975) internal successors, (714), 240 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:50,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 714 transitions. [2021-06-12 20:36:50,353 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 714 transitions. Word has length 20 [2021-06-12 20:36:50,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:50,353 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 714 transitions. [2021-06-12 20:36:50,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:50,353 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 714 transitions. [2021-06-12 20:36:50,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:36:50,353 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:50,353 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:50,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-12 20:36:50,565 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:50,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:50,565 INFO L82 PathProgramCache]: Analyzing trace with hash -516097883, now seen corresponding path program 7 times [2021-06-12 20:36:50,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:50,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016821536] [2021-06-12 20:36:50,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:50,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:50,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:50,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:50,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016821536] [2021-06-12 20:36:50,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016821536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:50,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738393176] [2021-06-12 20:36:50,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:50,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:50,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:36:50,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:50,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:50,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:36:50,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:50,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:50,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:50,703 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:36:50,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:50,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738393176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:50,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:50,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:36:50,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131794364] [2021-06-12 20:36:50,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:36:50,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:50,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:36:50,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:36:50,742 INFO L87 Difference]: Start difference. First operand 241 states and 714 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:50,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:50,875 INFO L93 Difference]: Finished difference Result 310 states and 911 transitions. [2021-06-12 20:36:50,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:36:50,876 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:36:50,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:50,877 INFO L225 Difference]: With dead ends: 310 [2021-06-12 20:36:50,877 INFO L226 Difference]: Without dead ends: 299 [2021-06-12 20:36:50,877 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 131.6ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:36:50,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-06-12 20:36:50,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 235. [2021-06-12 20:36:50,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.965811965811966) internal successors, (694), 234 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:50,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 694 transitions. [2021-06-12 20:36:50,881 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 694 transitions. Word has length 20 [2021-06-12 20:36:50,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:50,881 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 694 transitions. [2021-06-12 20:36:50,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:50,881 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 694 transitions. [2021-06-12 20:36:50,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:36:50,881 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:50,882 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:51,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-12 20:36:51,093 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:51,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:51,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1628624025, now seen corresponding path program 7 times [2021-06-12 20:36:51,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:51,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100788687] [2021-06-12 20:36:51,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:51,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:51,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:51,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:51,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100788687] [2021-06-12 20:36:51,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100788687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:51,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419758271] [2021-06-12 20:36:51,190 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:51,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:36:51,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:51,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:51,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:36:51,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:51,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:51,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:51,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:36:51,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:51,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419758271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:51,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:51,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:36:51,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814491405] [2021-06-12 20:36:51,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:36:51,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:51,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:36:51,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:36:51,315 INFO L87 Difference]: Start difference. First operand 235 states and 694 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:51,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:51,521 INFO L93 Difference]: Finished difference Result 350 states and 1025 transitions. [2021-06-12 20:36:51,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:36:51,521 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:36:51,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:51,522 INFO L225 Difference]: With dead ends: 350 [2021-06-12 20:36:51,522 INFO L226 Difference]: Without dead ends: 340 [2021-06-12 20:36:51,522 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 184.1ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:36:51,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-12 20:36:51,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 246. [2021-06-12 20:36:51,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 3.012244897959184) internal successors, (738), 245 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:51,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 738 transitions. [2021-06-12 20:36:51,526 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 738 transitions. Word has length 20 [2021-06-12 20:36:51,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:51,527 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 738 transitions. [2021-06-12 20:36:51,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:51,527 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 738 transitions. [2021-06-12 20:36:51,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:36:51,527 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:51,527 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:51,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-12 20:36:51,744 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:51,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:51,744 INFO L82 PathProgramCache]: Analyzing trace with hash -162237149, now seen corresponding path program 8 times [2021-06-12 20:36:51,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:51,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770124415] [2021-06-12 20:36:51,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:51,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:51,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:51,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770124415] [2021-06-12 20:36:51,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770124415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:51,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727253815] [2021-06-12 20:36:51,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:51,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:36:51,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:51,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:36:51,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:51,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:51,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:36:51,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:51,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:51,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:51,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:36:51,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:51,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727253815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:51,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:51,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:36:51,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331692236] [2021-06-12 20:36:51,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:36:51,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:51,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:36:51,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:36:51,977 INFO L87 Difference]: Start difference. First operand 246 states and 738 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:52,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:52,206 INFO L93 Difference]: Finished difference Result 351 states and 1041 transitions. [2021-06-12 20:36:52,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:36:52,206 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:36:52,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:52,208 INFO L225 Difference]: With dead ends: 351 [2021-06-12 20:36:52,208 INFO L226 Difference]: Without dead ends: 339 [2021-06-12 20:36:52,208 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 175.5ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:36:52,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-12 20:36:52,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 256. [2021-06-12 20:36:52,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 3.062745098039216) internal successors, (781), 255 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:52,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 781 transitions. [2021-06-12 20:36:52,212 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 781 transitions. Word has length 20 [2021-06-12 20:36:52,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:52,212 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 781 transitions. [2021-06-12 20:36:52,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:52,212 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 781 transitions. [2021-06-12 20:36:52,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:36:52,213 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:52,213 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:52,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-12 20:36:52,421 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:52,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:52,422 INFO L82 PathProgramCache]: Analyzing trace with hash -428870833, now seen corresponding path program 8 times [2021-06-12 20:36:52,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:52,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337083347] [2021-06-12 20:36:52,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:52,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:52,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:52,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:52,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337083347] [2021-06-12 20:36:52,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337083347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:52,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992345751] [2021-06-12 20:36:52,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:52,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:36:52,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:52,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:36:52,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:52,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:52,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:36:52,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:52,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:52,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:52,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:36:52,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:52,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992345751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:52,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:52,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:36:52,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861874580] [2021-06-12 20:36:52,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:36:52,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:52,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:36:52,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:36:52,623 INFO L87 Difference]: Start difference. First operand 256 states and 781 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:52,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:52,766 INFO L93 Difference]: Finished difference Result 333 states and 1000 transitions. [2021-06-12 20:36:52,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:36:52,767 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:36:52,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:52,768 INFO L225 Difference]: With dead ends: 333 [2021-06-12 20:36:52,768 INFO L226 Difference]: Without dead ends: 324 [2021-06-12 20:36:52,768 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 133.1ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:36:52,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-06-12 20:36:52,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 259. [2021-06-12 20:36:52,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 3.065891472868217) internal successors, (791), 258 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:52,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 791 transitions. [2021-06-12 20:36:52,772 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 791 transitions. Word has length 20 [2021-06-12 20:36:52,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:52,772 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 791 transitions. [2021-06-12 20:36:52,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:52,772 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 791 transitions. [2021-06-12 20:36:52,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:36:52,773 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:52,773 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:52,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:52,990 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:52,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:52,990 INFO L82 PathProgramCache]: Analyzing trace with hash -105284655, now seen corresponding path program 9 times [2021-06-12 20:36:52,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:52,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741232369] [2021-06-12 20:36:52,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:53,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:53,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:53,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741232369] [2021-06-12 20:36:53,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741232369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:53,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618896467] [2021-06-12 20:36:53,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:53,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:36:53,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:53,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:36:53,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:53,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:53,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:36:53,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:36:53,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:53,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:53,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:36:53,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:53,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618896467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:53,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:53,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-12 20:36:53,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544126287] [2021-06-12 20:36:53,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:36:53,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:53,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:36:53,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:36:53,282 INFO L87 Difference]: Start difference. First operand 259 states and 791 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:53,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:53,881 INFO L93 Difference]: Finished difference Result 353 states and 1060 transitions. [2021-06-12 20:36:53,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:36:53,882 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:36:53,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:53,883 INFO L225 Difference]: With dead ends: 353 [2021-06-12 20:36:53,883 INFO L226 Difference]: Without dead ends: 340 [2021-06-12 20:36:53,883 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 512.7ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:36:53,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-12 20:36:53,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 256. [2021-06-12 20:36:53,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 3.062745098039216) internal successors, (781), 255 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:53,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 781 transitions. [2021-06-12 20:36:53,891 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 781 transitions. Word has length 20 [2021-06-12 20:36:53,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:53,891 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 781 transitions. [2021-06-12 20:36:53,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:53,891 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 781 transitions. [2021-06-12 20:36:53,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:36:53,892 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:53,892 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:54,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-12 20:36:54,108 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:54,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:54,108 INFO L82 PathProgramCache]: Analyzing trace with hash 431638013, now seen corresponding path program 9 times [2021-06-12 20:36:54,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:54,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153413428] [2021-06-12 20:36:54,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:54,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:54,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:54,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:54,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153413428] [2021-06-12 20:36:54,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153413428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:54,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391511001] [2021-06-12 20:36:54,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:54,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:36:54,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:54,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:36:54,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:54,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:54,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:36:54,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:36:54,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:54,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:54,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:23 [2021-06-12 20:36:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:54,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391511001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:54,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:54,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-12 20:36:54,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099595299] [2021-06-12 20:36:54,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:36:54,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:54,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:36:54,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:36:54,372 INFO L87 Difference]: Start difference. First operand 256 states and 781 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:55,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:55,158 INFO L93 Difference]: Finished difference Result 485 states and 1380 transitions. [2021-06-12 20:36:55,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:36:55,159 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:36:55,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:55,162 INFO L225 Difference]: With dead ends: 485 [2021-06-12 20:36:55,162 INFO L226 Difference]: Without dead ends: 458 [2021-06-12 20:36:55,162 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 590.3ms TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:36:55,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-12 20:36:55,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 293. [2021-06-12 20:36:55,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.095890410958904) internal successors, (904), 292 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:55,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 904 transitions. [2021-06-12 20:36:55,167 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 904 transitions. Word has length 20 [2021-06-12 20:36:55,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:55,167 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 904 transitions. [2021-06-12 20:36:55,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:55,168 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 904 transitions. [2021-06-12 20:36:55,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:36:55,168 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:55,168 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:55,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-12 20:36:55,384 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:55,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:55,385 INFO L82 PathProgramCache]: Analyzing trace with hash 226719879, now seen corresponding path program 10 times [2021-06-12 20:36:55,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:55,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831338318] [2021-06-12 20:36:55,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:55,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:55,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:55,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:55,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831338318] [2021-06-12 20:36:55,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831338318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:55,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739090915] [2021-06-12 20:36:55,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:55,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:36:55,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:55,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:36:55,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:55,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:55,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:36:55,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:55,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:55,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:55,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-12 20:36:55,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:55,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739090915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:55,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:55,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:36:55,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348186063] [2021-06-12 20:36:55,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:36:55,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:55,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:36:55,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:36:55,590 INFO L87 Difference]: Start difference. First operand 293 states and 904 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:55,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:55,738 INFO L93 Difference]: Finished difference Result 371 states and 1128 transitions. [2021-06-12 20:36:55,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:36:55,738 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:36:55,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:55,739 INFO L225 Difference]: With dead ends: 371 [2021-06-12 20:36:55,739 INFO L226 Difference]: Without dead ends: 360 [2021-06-12 20:36:55,739 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 156.1ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:36:55,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-06-12 20:36:55,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 295. [2021-06-12 20:36:55,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 3.0884353741496597) internal successors, (908), 294 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:55,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 908 transitions. [2021-06-12 20:36:55,744 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 908 transitions. Word has length 20 [2021-06-12 20:36:55,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:55,744 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 908 transitions. [2021-06-12 20:36:55,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:55,744 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 908 transitions. [2021-06-12 20:36:55,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:36:55,745 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:55,745 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:55,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:55,958 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:55,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:55,958 INFO L82 PathProgramCache]: Analyzing trace with hash 2027400643, now seen corresponding path program 10 times [2021-06-12 20:36:55,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:55,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086777869] [2021-06-12 20:36:55,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:56,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:56,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:56,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086777869] [2021-06-12 20:36:56,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086777869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:56,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062755463] [2021-06-12 20:36:56,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:56,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:36:56,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:56,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:36:56,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:56,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:56,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:36:56,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:56,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:56,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:56,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-12 20:36:56,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:56,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062755463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:56,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:56,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:36:56,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84458211] [2021-06-12 20:36:56,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:36:56,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:56,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:36:56,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:36:56,146 INFO L87 Difference]: Start difference. First operand 295 states and 908 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:56,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:56,343 INFO L93 Difference]: Finished difference Result 412 states and 1240 transitions. [2021-06-12 20:36:56,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:36:56,343 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:36:56,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:56,345 INFO L225 Difference]: With dead ends: 412 [2021-06-12 20:36:56,345 INFO L226 Difference]: Without dead ends: 402 [2021-06-12 20:36:56,345 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 159.5ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:36:56,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-06-12 20:36:56,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 298. [2021-06-12 20:36:56,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.0875420875420874) internal successors, (917), 297 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:56,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 917 transitions. [2021-06-12 20:36:56,349 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 917 transitions. Word has length 20 [2021-06-12 20:36:56,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:56,349 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 917 transitions. [2021-06-12 20:36:56,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:56,349 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 917 transitions. [2021-06-12 20:36:56,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:36:56,350 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:56,350 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:56,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-12 20:36:56,566 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:56,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:56,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1645911141, now seen corresponding path program 11 times [2021-06-12 20:36:56,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:56,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058455414] [2021-06-12 20:36:56,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:56,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:56,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:56,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:56,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058455414] [2021-06-12 20:36:56,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058455414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:56,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607497593] [2021-06-12 20:36:56,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:56,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:36:56,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:56,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:36:56,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:56,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:56,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:36:56,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:56,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:56,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:56,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:10 [2021-06-12 20:36:56,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:56,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607497593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:56,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:56,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 20:36:56,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628669061] [2021-06-12 20:36:56,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:36:56,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:56,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:36:56,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:36:56,826 INFO L87 Difference]: Start difference. First operand 298 states and 917 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:57,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:57,222 INFO L93 Difference]: Finished difference Result 460 states and 1382 transitions. [2021-06-12 20:36:57,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:36:57,223 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:36:57,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:57,224 INFO L225 Difference]: With dead ends: 460 [2021-06-12 20:36:57,224 INFO L226 Difference]: Without dead ends: 450 [2021-06-12 20:36:57,225 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 334.1ms TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:36:57,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-12 20:36:57,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 298. [2021-06-12 20:36:57,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.0875420875420874) internal successors, (917), 297 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:57,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 917 transitions. [2021-06-12 20:36:57,230 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 917 transitions. Word has length 20 [2021-06-12 20:36:57,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:57,230 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 917 transitions. [2021-06-12 20:36:57,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:57,230 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 917 transitions. [2021-06-12 20:36:57,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:36:57,230 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:57,231 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:57,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:57,446 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:57,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:57,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1815317715, now seen corresponding path program 12 times [2021-06-12 20:36:57,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:57,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109029109] [2021-06-12 20:36:57,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:57,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:57,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:36:57,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:57,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109029109] [2021-06-12 20:36:57,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109029109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:57,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149240080] [2021-06-12 20:36:57,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:57,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:36:57,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:57,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:36:57,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:57,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:57,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:36:57,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:36:57,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:57,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:57,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:36:57,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:57,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149240080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:57,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:57,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-12 20:36:57,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137356369] [2021-06-12 20:36:57,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:36:57,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:57,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:36:57,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:36:57,721 INFO L87 Difference]: Start difference. First operand 298 states and 917 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:58,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:58,384 INFO L93 Difference]: Finished difference Result 552 states and 1617 transitions. [2021-06-12 20:36:58,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:36:58,385 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:36:58,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:58,387 INFO L225 Difference]: With dead ends: 552 [2021-06-12 20:36:58,387 INFO L226 Difference]: Without dead ends: 520 [2021-06-12 20:36:58,387 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 568.8ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:36:58,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-12 20:36:58,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 306. [2021-06-12 20:36:58,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.1180327868852458) internal successors, (951), 305 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:58,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 951 transitions. [2021-06-12 20:36:58,392 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 951 transitions. Word has length 20 [2021-06-12 20:36:58,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:58,392 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 951 transitions. [2021-06-12 20:36:58,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:58,392 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 951 transitions. [2021-06-12 20:36:58,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:36:58,392 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:58,393 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:58,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-12 20:36:58,608 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:58,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:58,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1895521031, now seen corresponding path program 11 times [2021-06-12 20:36:58,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:58,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857102397] [2021-06-12 20:36:58,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:58,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:58,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857102397] [2021-06-12 20:36:58,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857102397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:58,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953231653] [2021-06-12 20:36:58,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:58,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:36:58,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:58,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:36:58,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:58,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:36:58,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:36:58,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:36:58,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:58,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:58,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-12 20:36:58,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:58,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953231653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:58,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:58,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:36:58,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684080694] [2021-06-12 20:36:58,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:36:58,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:58,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:36:58,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:36:58,900 INFO L87 Difference]: Start difference. First operand 306 states and 951 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:59,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:59,099 INFO L93 Difference]: Finished difference Result 408 states and 1237 transitions. [2021-06-12 20:36:59,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:36:59,100 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:36:59,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:59,101 INFO L225 Difference]: With dead ends: 408 [2021-06-12 20:36:59,101 INFO L226 Difference]: Without dead ends: 399 [2021-06-12 20:36:59,101 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 157.4ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:36:59,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-06-12 20:36:59,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 309. [2021-06-12 20:36:59,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.1201298701298703) internal successors, (961), 308 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:59,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 961 transitions. [2021-06-12 20:36:59,106 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 961 transitions. Word has length 20 [2021-06-12 20:36:59,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:59,106 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 961 transitions. [2021-06-12 20:36:59,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:59,106 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 961 transitions. [2021-06-12 20:36:59,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:36:59,107 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:59,107 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:59,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-12 20:36:59,317 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:36:59,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:59,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1371296405, now seen corresponding path program 12 times [2021-06-12 20:36:59,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:59,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168554454] [2021-06-12 20:36:59,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:59,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:59,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:59,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:59,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168554454] [2021-06-12 20:36:59,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168554454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:59,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653551857] [2021-06-12 20:36:59,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:59,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:36:59,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:59,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:36:59,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:59,450 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:59,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:36:59,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:36:59,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:36:59,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:36:59,459 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-06-12 20:36:59,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:59,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653551857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:59,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:59,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 20:36:59,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184378431] [2021-06-12 20:36:59,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:36:59,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:59,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:36:59,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:36:59,525 INFO L87 Difference]: Start difference. First operand 309 states and 961 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:59,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:59,870 INFO L93 Difference]: Finished difference Result 429 states and 1298 transitions. [2021-06-12 20:36:59,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:36:59,870 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:36:59,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:59,871 INFO L225 Difference]: With dead ends: 429 [2021-06-12 20:36:59,871 INFO L226 Difference]: Without dead ends: 420 [2021-06-12 20:36:59,872 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 280.3ms TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:36:59,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-06-12 20:36:59,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 312. [2021-06-12 20:36:59,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.122186495176849) internal successors, (971), 311 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:59,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 971 transitions. [2021-06-12 20:36:59,876 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 971 transitions. Word has length 20 [2021-06-12 20:36:59,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:59,876 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 971 transitions. [2021-06-12 20:36:59,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:59,876 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 971 transitions. [2021-06-12 20:36:59,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:36:59,877 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:59,877 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:00,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-12 20:37:00,077 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:00,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:00,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1694882583, now seen corresponding path program 13 times [2021-06-12 20:37:00,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:00,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701450462] [2021-06-12 20:37:00,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:00,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:00,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:00,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:00,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701450462] [2021-06-12 20:37:00,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701450462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:00,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943132438] [2021-06-12 20:37:00,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:00,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:00,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:37:00,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:00,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:37:00,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:37:00,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:00,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:00,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:00,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:37:00,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:00,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943132438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:00,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:00,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:37:00,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240854241] [2021-06-12 20:37:00,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:37:00,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:00,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:37:00,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:37:00,246 INFO L87 Difference]: Start difference. First operand 312 states and 971 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:00,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:00,415 INFO L93 Difference]: Finished difference Result 391 states and 1193 transitions. [2021-06-12 20:37:00,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:37:00,415 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:37:00,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:00,416 INFO L225 Difference]: With dead ends: 391 [2021-06-12 20:37:00,416 INFO L226 Difference]: Without dead ends: 380 [2021-06-12 20:37:00,416 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 135.6ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:37:00,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-06-12 20:37:00,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 306. [2021-06-12 20:37:00,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.1180327868852458) internal successors, (951), 305 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:00,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 951 transitions. [2021-06-12 20:37:00,421 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 951 transitions. Word has length 20 [2021-06-12 20:37:00,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:00,421 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 951 transitions. [2021-06-12 20:37:00,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:00,422 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 951 transitions. [2021-06-12 20:37:00,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:37:00,422 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:00,422 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:00,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-12 20:37:00,633 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:00,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:00,633 INFO L82 PathProgramCache]: Analyzing trace with hash -455362805, now seen corresponding path program 13 times [2021-06-12 20:37:00,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:00,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772022653] [2021-06-12 20:37:00,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:00,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:00,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:00,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772022653] [2021-06-12 20:37:00,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772022653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:00,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066223053] [2021-06-12 20:37:00,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 20:37:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:00,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:37:00,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:00,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:37:00,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:37:00,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:00,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:00,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:00,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:37:00,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:00,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066223053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:00,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:00,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:37:00,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291576068] [2021-06-12 20:37:00,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:37:00,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:00,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:37:00,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:37:00,863 INFO L87 Difference]: Start difference. First operand 306 states and 951 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:01,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:01,080 INFO L93 Difference]: Finished difference Result 431 states and 1307 transitions. [2021-06-12 20:37:01,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:37:01,080 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:37:01,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:01,081 INFO L225 Difference]: With dead ends: 431 [2021-06-12 20:37:01,081 INFO L226 Difference]: Without dead ends: 421 [2021-06-12 20:37:01,082 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 185.4ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:37:01,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-06-12 20:37:01,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 309. [2021-06-12 20:37:01,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.1136363636363638) internal successors, (959), 308 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:01,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 959 transitions. [2021-06-12 20:37:01,086 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 959 transitions. Word has length 20 [2021-06-12 20:37:01,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:01,086 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 959 transitions. [2021-06-12 20:37:01,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:01,086 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 959 transitions. [2021-06-12 20:37:01,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:37:01,087 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:01,087 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:01,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-12 20:37:01,297 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:01,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:01,297 INFO L82 PathProgramCache]: Analyzing trace with hash 2048743317, now seen corresponding path program 14 times [2021-06-12 20:37:01,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:01,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575080460] [2021-06-12 20:37:01,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:01,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:01,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:01,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:01,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575080460] [2021-06-12 20:37:01,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575080460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:01,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452519171] [2021-06-12 20:37:01,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:01,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:37:01,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:01,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:37:01,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:01,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:37:01,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:37:01,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:01,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:01,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:01,459 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:37:01,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:01,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452519171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:01,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:01,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:37:01,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292119894] [2021-06-12 20:37:01,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:37:01,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:01,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:37:01,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:37:01,514 INFO L87 Difference]: Start difference. First operand 309 states and 959 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:01,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:01,759 INFO L93 Difference]: Finished difference Result 424 states and 1287 transitions. [2021-06-12 20:37:01,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:37:01,759 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:37:01,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:01,761 INFO L225 Difference]: With dead ends: 424 [2021-06-12 20:37:01,761 INFO L226 Difference]: Without dead ends: 412 [2021-06-12 20:37:01,761 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 181.0ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:37:01,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-06-12 20:37:01,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 309. [2021-06-12 20:37:01,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.1136363636363638) internal successors, (959), 308 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:01,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 959 transitions. [2021-06-12 20:37:01,765 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 959 transitions. Word has length 20 [2021-06-12 20:37:01,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:01,765 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 959 transitions. [2021-06-12 20:37:01,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:01,765 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 959 transitions. [2021-06-12 20:37:01,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:37:01,766 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:01,766 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:01,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:01,973 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:01,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:01,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1782109633, now seen corresponding path program 14 times [2021-06-12 20:37:01,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:01,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226265657] [2021-06-12 20:37:01,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:01,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:02,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:02,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:02,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226265657] [2021-06-12 20:37:02,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226265657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:02,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269191694] [2021-06-12 20:37:02,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:02,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:37:02,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:02,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:37:02,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:02,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:37:02,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:37:02,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:02,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:02,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:02,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:37:02,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:02,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269191694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:02,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:02,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:37:02,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919184248] [2021-06-12 20:37:02,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:37:02,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:02,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:37:02,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:37:02,177 INFO L87 Difference]: Start difference. First operand 309 states and 959 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:02,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:02,358 INFO L93 Difference]: Finished difference Result 398 states and 1210 transitions. [2021-06-12 20:37:02,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:37:02,358 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:37:02,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:02,359 INFO L225 Difference]: With dead ends: 398 [2021-06-12 20:37:02,359 INFO L226 Difference]: Without dead ends: 389 [2021-06-12 20:37:02,359 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 147.6ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:37:02,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-12 20:37:02,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 312. [2021-06-12 20:37:02,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.1157556270096465) internal successors, (969), 311 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:02,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 969 transitions. [2021-06-12 20:37:02,364 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 969 transitions. Word has length 20 [2021-06-12 20:37:02,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:02,364 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 969 transitions. [2021-06-12 20:37:02,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:02,364 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 969 transitions. [2021-06-12 20:37:02,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:37:02,364 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:02,365 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:02,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:02,580 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:02,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:02,581 INFO L82 PathProgramCache]: Analyzing trace with hash 2105695811, now seen corresponding path program 15 times [2021-06-12 20:37:02,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:02,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142508383] [2021-06-12 20:37:02,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:02,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:02,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:02,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142508383] [2021-06-12 20:37:02,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142508383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:02,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093200120] [2021-06-12 20:37:02,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:02,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:37:02,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:02,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:37:02,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:02,734 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:02,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:37:02,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:02,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:02,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:02,743 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-12 20:37:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:02,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093200120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:02,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:02,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-12 20:37:02,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186390903] [2021-06-12 20:37:02,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:37:02,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:02,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:37:02,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:37:02,853 INFO L87 Difference]: Start difference. First operand 312 states and 969 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:03,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:03,628 INFO L93 Difference]: Finished difference Result 464 states and 1400 transitions. [2021-06-12 20:37:03,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:37:03,628 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:37:03,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:03,630 INFO L225 Difference]: With dead ends: 464 [2021-06-12 20:37:03,630 INFO L226 Difference]: Without dead ends: 451 [2021-06-12 20:37:03,630 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 679.8ms TimeCoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:37:03,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-12 20:37:03,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 309. [2021-06-12 20:37:03,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.1136363636363638) internal successors, (959), 308 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:03,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 959 transitions. [2021-06-12 20:37:03,635 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 959 transitions. Word has length 20 [2021-06-12 20:37:03,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:03,635 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 959 transitions. [2021-06-12 20:37:03,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:03,635 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 959 transitions. [2021-06-12 20:37:03,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:37:03,636 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:03,636 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:03,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-12 20:37:03,852 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:03,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:03,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1652348817, now seen corresponding path program 15 times [2021-06-12 20:37:03,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:03,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130297992] [2021-06-12 20:37:03,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:03,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:03,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:03,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:03,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130297992] [2021-06-12 20:37:03,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130297992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:03,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822019539] [2021-06-12 20:37:03,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:03,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:37:03,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:03,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:37:03,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:04,010 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:04,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:37:04,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:04,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:04,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:04,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:23 [2021-06-12 20:37:04,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:04,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822019539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:04,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:04,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-12 20:37:04,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230107748] [2021-06-12 20:37:04,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:37:04,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:04,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:37:04,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:37:04,108 INFO L87 Difference]: Start difference. First operand 309 states and 959 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:05,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:05,162 INFO L93 Difference]: Finished difference Result 598 states and 1728 transitions. [2021-06-12 20:37:05,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:37:05,162 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:37:05,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:05,164 INFO L225 Difference]: With dead ends: 598 [2021-06-12 20:37:05,164 INFO L226 Difference]: Without dead ends: 571 [2021-06-12 20:37:05,165 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 779.6ms TimeCoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:37:05,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-12 20:37:05,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 313. [2021-06-12 20:37:05,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.1121794871794872) internal successors, (971), 312 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:05,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 971 transitions. [2021-06-12 20:37:05,170 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 971 transitions. Word has length 20 [2021-06-12 20:37:05,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:05,170 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 971 transitions. [2021-06-12 20:37:05,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:05,170 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 971 transitions. [2021-06-12 20:37:05,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:37:05,171 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:05,171 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:05,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:05,371 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:05,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:05,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1857266951, now seen corresponding path program 16 times [2021-06-12 20:37:05,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:05,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011233780] [2021-06-12 20:37:05,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:05,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:05,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:05,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:05,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011233780] [2021-06-12 20:37:05,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011233780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:05,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155066572] [2021-06-12 20:37:05,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:05,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:37:05,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:05,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:37:05,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:05,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:37:05,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-12 20:37:05,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:05,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:05,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:05,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:37:05,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:05,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155066572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:05,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:05,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:37:05,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892998173] [2021-06-12 20:37:05,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:37:05,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:05,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:37:05,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:37:05,578 INFO L87 Difference]: Start difference. First operand 313 states and 971 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:05,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:05,789 INFO L93 Difference]: Finished difference Result 403 states and 1227 transitions. [2021-06-12 20:37:05,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:37:05,789 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:37:05,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:05,790 INFO L225 Difference]: With dead ends: 403 [2021-06-12 20:37:05,790 INFO L226 Difference]: Without dead ends: 392 [2021-06-12 20:37:05,791 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 163.8ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:37:05,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-12 20:37:05,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 306. [2021-06-12 20:37:05,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.1180327868852458) internal successors, (951), 305 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:05,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 951 transitions. [2021-06-12 20:37:05,795 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 951 transitions. Word has length 20 [2021-06-12 20:37:05,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:05,795 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 951 transitions. [2021-06-12 20:37:05,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:05,795 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 951 transitions. [2021-06-12 20:37:05,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:37:05,795 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:05,795 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:05,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:05,996 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:05,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:05,996 INFO L82 PathProgramCache]: Analyzing trace with hash -76255857, now seen corresponding path program 16 times [2021-06-12 20:37:05,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:05,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458302330] [2021-06-12 20:37:05,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:06,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:06,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:06,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:06,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458302330] [2021-06-12 20:37:06,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458302330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:06,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54443890] [2021-06-12 20:37:06,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:06,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:37:06,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:06,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:37:06,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:06,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:37:06,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:37:06,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:06,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:06,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:06,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:37:06,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:06,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54443890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:06,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:06,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:37:06,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544366915] [2021-06-12 20:37:06,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:37:06,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:06,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:37:06,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:37:06,209 INFO L87 Difference]: Start difference. First operand 306 states and 951 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:06,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:06,480 INFO L93 Difference]: Finished difference Result 448 states and 1357 transitions. [2021-06-12 20:37:06,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:37:06,481 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:37:06,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:06,482 INFO L225 Difference]: With dead ends: 448 [2021-06-12 20:37:06,482 INFO L226 Difference]: Without dead ends: 438 [2021-06-12 20:37:06,482 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 248.4ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:37:06,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-12 20:37:06,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 312. [2021-06-12 20:37:06,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.112540192926045) internal successors, (968), 311 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:06,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 968 transitions. [2021-06-12 20:37:06,487 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 968 transitions. Word has length 20 [2021-06-12 20:37:06,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:06,487 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 968 transitions. [2021-06-12 20:37:06,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:06,487 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 968 transitions. [2021-06-12 20:37:06,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:37:06,487 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:06,488 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:06,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:06,703 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:06,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:06,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1438435337, now seen corresponding path program 17 times [2021-06-12 20:37:06,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:06,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247903324] [2021-06-12 20:37:06,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:06,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:06,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:06,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:06,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247903324] [2021-06-12 20:37:06,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247903324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:06,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425190165] [2021-06-12 20:37:06,811 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:06,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:37:06,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:06,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:37:06,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:06,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:37:06,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:37:06,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:06,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:06,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:06,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:37:06,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:06,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425190165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:06,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:06,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:37:06,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316764884] [2021-06-12 20:37:06,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:37:06,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:06,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:37:06,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:37:06,934 INFO L87 Difference]: Start difference. First operand 312 states and 968 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:07,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:07,287 INFO L93 Difference]: Finished difference Result 497 states and 1504 transitions. [2021-06-12 20:37:07,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:37:07,287 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:37:07,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:07,289 INFO L225 Difference]: With dead ends: 497 [2021-06-12 20:37:07,289 INFO L226 Difference]: Without dead ends: 485 [2021-06-12 20:37:07,289 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 261.6ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:37:07,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-06-12 20:37:07,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 312. [2021-06-12 20:37:07,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.112540192926045) internal successors, (968), 311 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:07,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 968 transitions. [2021-06-12 20:37:07,294 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 968 transitions. Word has length 20 [2021-06-12 20:37:07,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:07,294 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 968 transitions. [2021-06-12 20:37:07,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:07,294 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 968 transitions. [2021-06-12 20:37:07,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:37:07,295 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:07,295 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:07,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:07,509 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:07,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:07,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1865369703, now seen corresponding path program 17 times [2021-06-12 20:37:07,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:07,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109185583] [2021-06-12 20:37:07,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:07,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:07,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:07,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109185583] [2021-06-12 20:37:07,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109185583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:07,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486912321] [2021-06-12 20:37:07,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:07,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:37:07,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:07,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:37:07,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:07,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:37:07,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:37:07,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:07,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:07,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:07,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:37:07,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:07,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486912321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:07,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:07,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:37:07,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935983357] [2021-06-12 20:37:07,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:37:07,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:07,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:37:07,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:37:07,727 INFO L87 Difference]: Start difference. First operand 312 states and 968 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:07,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:07,917 INFO L93 Difference]: Finished difference Result 435 states and 1319 transitions. [2021-06-12 20:37:07,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:37:07,917 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:37:07,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:07,918 INFO L225 Difference]: With dead ends: 435 [2021-06-12 20:37:07,918 INFO L226 Difference]: Without dead ends: 426 [2021-06-12 20:37:07,918 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 175.5ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:37:07,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-06-12 20:37:07,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 315. [2021-06-12 20:37:07,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.1146496815286624) internal successors, (978), 314 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:07,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 978 transitions. [2021-06-12 20:37:07,923 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 978 transitions. Word has length 20 [2021-06-12 20:37:07,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:07,923 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 978 transitions. [2021-06-12 20:37:07,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:07,923 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 978 transitions. [2021-06-12 20:37:07,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:37:07,924 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:07,924 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:08,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-12 20:37:08,131 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:08,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:08,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1541783525, now seen corresponding path program 18 times [2021-06-12 20:37:08,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:08,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072055130] [2021-06-12 20:37:08,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:08,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:08,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:08,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:08,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072055130] [2021-06-12 20:37:08,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072055130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:08,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291775349] [2021-06-12 20:37:08,187 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:08,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:37:08,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:08,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:37:08,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:08,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:37:08,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:37:08,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:08,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:08,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:08,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-12 20:37:08,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:08,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291775349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:08,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:08,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:37:08,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972996454] [2021-06-12 20:37:08,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:37:08,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:08,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:37:08,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:37:08,336 INFO L87 Difference]: Start difference. First operand 315 states and 978 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:08,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:08,511 INFO L93 Difference]: Finished difference Result 432 states and 1315 transitions. [2021-06-12 20:37:08,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:37:08,511 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:37:08,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:08,512 INFO L225 Difference]: With dead ends: 432 [2021-06-12 20:37:08,512 INFO L226 Difference]: Without dead ends: 421 [2021-06-12 20:37:08,512 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 161.9ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:37:08,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-06-12 20:37:08,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 312. [2021-06-12 20:37:08,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.112540192926045) internal successors, (968), 311 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:08,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 968 transitions. [2021-06-12 20:37:08,516 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 968 transitions. Word has length 20 [2021-06-12 20:37:08,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:08,517 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 968 transitions. [2021-06-12 20:37:08,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:08,517 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 968 transitions. [2021-06-12 20:37:08,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:37:08,517 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:08,517 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:08,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:08,729 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:08,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:08,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1004860857, now seen corresponding path program 18 times [2021-06-12 20:37:08,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:08,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108070603] [2021-06-12 20:37:08,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:08,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:08,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:08,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108070603] [2021-06-12 20:37:08,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108070603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:08,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800011083] [2021-06-12 20:37:08,814 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:08,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:37:08,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:08,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:37:08,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:08,918 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:08,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 20:37:08,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:08,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:08,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:08,928 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:29 [2021-06-12 20:37:08,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:08,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800011083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:08,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:08,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 20:37:08,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953168804] [2021-06-12 20:37:08,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:37:08,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:08,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:37:08,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:37:08,989 INFO L87 Difference]: Start difference. First operand 312 states and 968 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:09,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:09,943 INFO L93 Difference]: Finished difference Result 644 states and 1918 transitions. [2021-06-12 20:37:09,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:37:09,943 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:37:09,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:09,944 INFO L225 Difference]: With dead ends: 644 [2021-06-12 20:37:09,944 INFO L226 Difference]: Without dead ends: 622 [2021-06-12 20:37:09,945 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 632.2ms TimeCoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:37:09,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-06-12 20:37:09,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 316. [2021-06-12 20:37:09,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 3.111111111111111) internal successors, (980), 315 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:09,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 980 transitions. [2021-06-12 20:37:09,950 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 980 transitions. Word has length 20 [2021-06-12 20:37:09,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:09,950 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 980 transitions. [2021-06-12 20:37:09,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:09,950 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 980 transitions. [2021-06-12 20:37:09,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:37:09,950 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:09,950 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:10,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:10,157 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:10,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:10,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1209778991, now seen corresponding path program 19 times [2021-06-12 20:37:10,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:10,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084136974] [2021-06-12 20:37:10,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:10,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:10,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:10,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:10,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084136974] [2021-06-12 20:37:10,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084136974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:10,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725336669] [2021-06-12 20:37:10,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:10,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:10,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:37:10,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:10,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:37:10,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-12 20:37:10,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:10,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:10,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:10,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:37:10,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:10,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725336669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:10,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:10,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:37:10,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238711865] [2021-06-12 20:37:10,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:37:10,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:10,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:37:10,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:37:10,393 INFO L87 Difference]: Start difference. First operand 316 states and 980 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:10,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:10,615 INFO L93 Difference]: Finished difference Result 437 states and 1326 transitions. [2021-06-12 20:37:10,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:37:10,616 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:37:10,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:10,616 INFO L225 Difference]: With dead ends: 437 [2021-06-12 20:37:10,616 INFO L226 Difference]: Without dead ends: 426 [2021-06-12 20:37:10,617 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 193.0ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:37:10,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-06-12 20:37:10,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 315. [2021-06-12 20:37:10,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.1178343949044587) internal successors, (979), 314 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:10,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 979 transitions. [2021-06-12 20:37:10,621 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 979 transitions. Word has length 20 [2021-06-12 20:37:10,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:10,621 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 979 transitions. [2021-06-12 20:37:10,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:10,621 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 979 transitions. [2021-06-12 20:37:10,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:37:10,621 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:10,621 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:10,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:10,837 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:10,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:10,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1625404767, now seen corresponding path program 19 times [2021-06-12 20:37:10,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:10,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430713030] [2021-06-12 20:37:10,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:10,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:10,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:10,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:10,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430713030] [2021-06-12 20:37:10,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430713030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:10,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208725152] [2021-06-12 20:37:10,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:10,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:10,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:37:10,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:11,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:37:11,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-12 20:37:11,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:11,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:11,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:11,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-12 20:37:11,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:11,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208725152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:11,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:11,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:37:11,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84140506] [2021-06-12 20:37:11,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:37:11,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:11,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:37:11,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:37:11,042 INFO L87 Difference]: Start difference. First operand 315 states and 979 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:11,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:11,508 INFO L93 Difference]: Finished difference Result 577 states and 1769 transitions. [2021-06-12 20:37:11,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:37:11,508 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:37:11,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:11,509 INFO L225 Difference]: With dead ends: 577 [2021-06-12 20:37:11,510 INFO L226 Difference]: Without dead ends: 566 [2021-06-12 20:37:11,510 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 267.5ms TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:37:11,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-12 20:37:11,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 323. [2021-06-12 20:37:11,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 3.1180124223602483) internal successors, (1004), 322 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:11,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 1004 transitions. [2021-06-12 20:37:11,515 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 1004 transitions. Word has length 20 [2021-06-12 20:37:11,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:11,515 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 1004 transitions. [2021-06-12 20:37:11,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:11,515 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 1004 transitions. [2021-06-12 20:37:11,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:37:11,515 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:11,515 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:11,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-12 20:37:11,729 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:11,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:11,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1821665449, now seen corresponding path program 20 times [2021-06-12 20:37:11,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:11,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910725983] [2021-06-12 20:37:11,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:11,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:11,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:11,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:11,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910725983] [2021-06-12 20:37:11,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910725983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:11,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950136516] [2021-06-12 20:37:11,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:11,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:37:11,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:11,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:37:11,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:11,898 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:11,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 20:37:11,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:11,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:11,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:11,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:22 [2021-06-12 20:37:11,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:11,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950136516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:11,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:11,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 20:37:11,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209344759] [2021-06-12 20:37:11,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:37:11,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:11,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:37:11,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:37:11,977 INFO L87 Difference]: Start difference. First operand 323 states and 1004 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:12,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:12,388 INFO L93 Difference]: Finished difference Result 516 states and 1586 transitions. [2021-06-12 20:37:12,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:37:12,388 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:37:12,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:12,389 INFO L225 Difference]: With dead ends: 516 [2021-06-12 20:37:12,389 INFO L226 Difference]: Without dead ends: 505 [2021-06-12 20:37:12,389 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 264.7ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:37:12,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-06-12 20:37:12,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 322. [2021-06-12 20:37:12,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.1246105919003115) internal successors, (1003), 321 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:12,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1003 transitions. [2021-06-12 20:37:12,394 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1003 transitions. Word has length 20 [2021-06-12 20:37:12,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:12,394 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 1003 transitions. [2021-06-12 20:37:12,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:12,394 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1003 transitions. [2021-06-12 20:37:12,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:37:12,395 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:12,395 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:12,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:12,595 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:12,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:12,596 INFO L82 PathProgramCache]: Analyzing trace with hash -827696633, now seen corresponding path program 20 times [2021-06-12 20:37:12,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:12,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409126931] [2021-06-12 20:37:12,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:12,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:12,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409126931] [2021-06-12 20:37:12,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409126931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:12,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382629004] [2021-06-12 20:37:12,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:12,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:37:12,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:12,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:37:12,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:12,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:12,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382629004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:12,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:12,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 20:37:12,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474416160] [2021-06-12 20:37:12,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:37:12,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:12,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:37:12,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:37:12,683 INFO L87 Difference]: Start difference. First operand 322 states and 1003 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:12,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:12,747 INFO L93 Difference]: Finished difference Result 489 states and 1527 transitions. [2021-06-12 20:37:12,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:37:12,747 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:37:12,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:12,748 INFO L225 Difference]: With dead ends: 489 [2021-06-12 20:37:12,748 INFO L226 Difference]: Without dead ends: 489 [2021-06-12 20:37:12,748 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:37:12,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-12 20:37:12,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 311. [2021-06-12 20:37:12,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.203225806451613) internal successors, (993), 310 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:12,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 993 transitions. [2021-06-12 20:37:12,753 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 993 transitions. Word has length 22 [2021-06-12 20:37:12,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:12,753 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 993 transitions. [2021-06-12 20:37:12,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:12,753 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 993 transitions. [2021-06-12 20:37:12,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:37:12,753 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:12,753 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:12,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:12,954 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:12,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:12,954 INFO L82 PathProgramCache]: Analyzing trace with hash 196643718, now seen corresponding path program 21 times [2021-06-12 20:37:12,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:12,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308911549] [2021-06-12 20:37:12,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:12,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:12,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:12,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:12,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308911549] [2021-06-12 20:37:12,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308911549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:12,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702973215] [2021-06-12 20:37:12,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:12,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:37:12,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:12,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:37:12,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:13,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:13,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702973215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:13,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:13,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 20:37:13,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854744991] [2021-06-12 20:37:13,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:37:13,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:13,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:37:13,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:37:13,036 INFO L87 Difference]: Start difference. First operand 311 states and 993 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:13,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:13,118 INFO L93 Difference]: Finished difference Result 498 states and 1529 transitions. [2021-06-12 20:37:13,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:37:13,119 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:37:13,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:13,119 INFO L225 Difference]: With dead ends: 498 [2021-06-12 20:37:13,119 INFO L226 Difference]: Without dead ends: 439 [2021-06-12 20:37:13,119 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:37:13,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-12 20:37:13,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 311. [2021-06-12 20:37:13,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.170967741935484) internal successors, (983), 310 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:13,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 983 transitions. [2021-06-12 20:37:13,124 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 983 transitions. Word has length 22 [2021-06-12 20:37:13,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:13,124 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 983 transitions. [2021-06-12 20:37:13,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:13,124 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 983 transitions. [2021-06-12 20:37:13,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:37:13,124 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:13,124 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:13,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-06-12 20:37:13,340 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:13,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:13,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1724048449, now seen corresponding path program 22 times [2021-06-12 20:37:13,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:13,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895804232] [2021-06-12 20:37:13,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:13,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:13,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:13,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895804232] [2021-06-12 20:37:13,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895804232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:13,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210505990] [2021-06-12 20:37:13,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:13,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:37:13,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:13,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:37:13,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:13,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:13,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210505990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:13,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:13,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 20:37:13,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602275806] [2021-06-12 20:37:13,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:37:13,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:13,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:37:13,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:37:13,446 INFO L87 Difference]: Start difference. First operand 311 states and 983 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:13,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:13,544 INFO L93 Difference]: Finished difference Result 640 states and 1919 transitions. [2021-06-12 20:37:13,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:37:13,545 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:37:13,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:13,546 INFO L225 Difference]: With dead ends: 640 [2021-06-12 20:37:13,546 INFO L226 Difference]: Without dead ends: 640 [2021-06-12 20:37:13,546 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:37:13,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-06-12 20:37:13,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 368. [2021-06-12 20:37:13,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.231607629427793) internal successors, (1186), 367 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:13,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1186 transitions. [2021-06-12 20:37:13,551 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1186 transitions. Word has length 22 [2021-06-12 20:37:13,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:13,552 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1186 transitions. [2021-06-12 20:37:13,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:13,552 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1186 transitions. [2021-06-12 20:37:13,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:37:13,552 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:13,552 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:13,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:13,761 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:13,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:13,761 INFO L82 PathProgramCache]: Analyzing trace with hash 40343294, now seen corresponding path program 23 times [2021-06-12 20:37:13,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:13,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699518297] [2021-06-12 20:37:13,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:13,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:13,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:13,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:13,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699518297] [2021-06-12 20:37:13,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699518297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:13,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889920065] [2021-06-12 20:37:13,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:13,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:37:13,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:13,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:37:13,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:13,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:13,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889920065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:13,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:13,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 20:37:13,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163057674] [2021-06-12 20:37:13,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:37:13,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:13,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:37:13,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:37:13,870 INFO L87 Difference]: Start difference. First operand 368 states and 1186 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:14,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:14,006 INFO L93 Difference]: Finished difference Result 772 states and 2287 transitions. [2021-06-12 20:37:14,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:37:14,006 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:37:14,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:14,007 INFO L225 Difference]: With dead ends: 772 [2021-06-12 20:37:14,007 INFO L226 Difference]: Without dead ends: 728 [2021-06-12 20:37:14,007 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:37:14,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-06-12 20:37:14,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 506. [2021-06-12 20:37:14,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 3.235643564356436) internal successors, (1634), 505 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:14,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1634 transitions. [2021-06-12 20:37:14,014 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1634 transitions. Word has length 22 [2021-06-12 20:37:14,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:14,014 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1634 transitions. [2021-06-12 20:37:14,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:14,015 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1634 transitions. [2021-06-12 20:37:14,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:37:14,015 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:14,015 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:14,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-06-12 20:37:14,216 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:14,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:14,216 INFO L82 PathProgramCache]: Analyzing trace with hash 358278619, now seen corresponding path program 24 times [2021-06-12 20:37:14,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:14,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96297351] [2021-06-12 20:37:14,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:14,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:14,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:14,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96297351] [2021-06-12 20:37:14,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96297351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:14,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005873707] [2021-06-12 20:37:14,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:14,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:37:14,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:14,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:37:14,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:14,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005873707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:14,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:14,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 20:37:14,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544480631] [2021-06-12 20:37:14,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:37:14,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:14,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:37:14,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:37:14,308 INFO L87 Difference]: Start difference. First operand 506 states and 1634 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:14,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:14,419 INFO L93 Difference]: Finished difference Result 972 states and 2907 transitions. [2021-06-12 20:37:14,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:37:14,419 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:37:14,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:14,424 INFO L225 Difference]: With dead ends: 972 [2021-06-12 20:37:14,424 INFO L226 Difference]: Without dead ends: 972 [2021-06-12 20:37:14,424 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 66.4ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:37:14,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2021-06-12 20:37:14,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 557. [2021-06-12 20:37:14,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 3.318345323741007) internal successors, (1845), 556 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:14,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 1845 transitions. [2021-06-12 20:37:14,432 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 1845 transitions. Word has length 22 [2021-06-12 20:37:14,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:14,432 INFO L482 AbstractCegarLoop]: Abstraction has 557 states and 1845 transitions. [2021-06-12 20:37:14,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:14,432 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 1845 transitions. [2021-06-12 20:37:14,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:37:14,433 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:14,433 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:14,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:14,634 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:14,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:14,634 INFO L82 PathProgramCache]: Analyzing trace with hash -527046306, now seen corresponding path program 25 times [2021-06-12 20:37:14,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:14,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880617692] [2021-06-12 20:37:14,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:14,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:14,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:14,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880617692] [2021-06-12 20:37:14,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880617692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:14,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197265695] [2021-06-12 20:37:14,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:14,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:14,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:37:14,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:14,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:14,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197265695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:14,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:14,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 20:37:14,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789011614] [2021-06-12 20:37:14,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:37:14,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:14,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:37:14,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:37:14,723 INFO L87 Difference]: Start difference. First operand 557 states and 1845 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:14,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:14,888 INFO L93 Difference]: Finished difference Result 964 states and 2972 transitions. [2021-06-12 20:37:14,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:37:14,888 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:37:14,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:14,889 INFO L225 Difference]: With dead ends: 964 [2021-06-12 20:37:14,889 INFO L226 Difference]: Without dead ends: 916 [2021-06-12 20:37:14,890 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:37:14,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2021-06-12 20:37:14,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 606. [2021-06-12 20:37:14,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 3.3338842975206613) internal successors, (2017), 605 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:14,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 2017 transitions. [2021-06-12 20:37:14,898 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 2017 transitions. Word has length 22 [2021-06-12 20:37:14,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:14,898 INFO L482 AbstractCegarLoop]: Abstraction has 606 states and 2017 transitions. [2021-06-12 20:37:14,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:14,899 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 2017 transitions. [2021-06-12 20:37:14,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:37:14,899 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:14,900 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:15,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-12 20:37:15,115 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:15,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:15,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1135425701, now seen corresponding path program 26 times [2021-06-12 20:37:15,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:15,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643181320] [2021-06-12 20:37:15,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:15,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:15,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:15,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643181320] [2021-06-12 20:37:15,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643181320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:15,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726080943] [2021-06-12 20:37:15,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 20:37:15,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:37:15,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:15,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:37:15,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:15,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726080943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:15,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:15,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 20:37:15,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414348245] [2021-06-12 20:37:15,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:37:15,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:15,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:37:15,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:37:15,212 INFO L87 Difference]: Start difference. First operand 606 states and 2017 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:15,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:15,356 INFO L93 Difference]: Finished difference Result 881 states and 2727 transitions. [2021-06-12 20:37:15,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:37:15,357 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:37:15,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:15,358 INFO L225 Difference]: With dead ends: 881 [2021-06-12 20:37:15,358 INFO L226 Difference]: Without dead ends: 871 [2021-06-12 20:37:15,358 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 94.3ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:37:15,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-06-12 20:37:15,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 612. [2021-06-12 20:37:15,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 3.3060556464811786) internal successors, (2020), 611 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:15,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 2020 transitions. [2021-06-12 20:37:15,367 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 2020 transitions. Word has length 22 [2021-06-12 20:37:15,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:15,368 INFO L482 AbstractCegarLoop]: Abstraction has 612 states and 2020 transitions. [2021-06-12 20:37:15,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:15,368 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 2020 transitions. [2021-06-12 20:37:15,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:37:15,368 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:15,369 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:15,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-12 20:37:15,585 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:15,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:15,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1507852130, now seen corresponding path program 27 times [2021-06-12 20:37:15,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:15,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132544496] [2021-06-12 20:37:15,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:15,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:15,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:15,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132544496] [2021-06-12 20:37:15,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132544496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:15,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299980644] [2021-06-12 20:37:15,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:15,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:37:15,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:15,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:37:15,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:15,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:15,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299980644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:15,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:15,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 20:37:15,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999477605] [2021-06-12 20:37:15,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:37:15,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:15,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:37:15,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:37:15,685 INFO L87 Difference]: Start difference. First operand 612 states and 2020 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:15,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:15,796 INFO L93 Difference]: Finished difference Result 917 states and 2822 transitions. [2021-06-12 20:37:15,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:37:15,796 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:37:15,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:15,798 INFO L225 Difference]: With dead ends: 917 [2021-06-12 20:37:15,798 INFO L226 Difference]: Without dead ends: 893 [2021-06-12 20:37:15,798 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:37:15,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-06-12 20:37:15,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 606. [2021-06-12 20:37:15,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 3.3239669421487603) internal successors, (2011), 605 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:15,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 2011 transitions. [2021-06-12 20:37:15,807 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 2011 transitions. Word has length 22 [2021-06-12 20:37:15,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:15,807 INFO L482 AbstractCegarLoop]: Abstraction has 606 states and 2011 transitions. [2021-06-12 20:37:15,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:15,807 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 2011 transitions. [2021-06-12 20:37:15,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:37:15,808 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:15,808 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:16,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:16,021 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:16,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:16,021 INFO L82 PathProgramCache]: Analyzing trace with hash 326583295, now seen corresponding path program 28 times [2021-06-12 20:37:16,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:16,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516840823] [2021-06-12 20:37:16,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:16,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:16,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:16,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:16,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516840823] [2021-06-12 20:37:16,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516840823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:16,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954162107] [2021-06-12 20:37:16,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:16,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:37:16,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:16,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:37:16,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:16,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:16,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954162107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:16,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:16,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 20:37:16,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195233966] [2021-06-12 20:37:16,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:37:16,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:16,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:37:16,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:37:16,121 INFO L87 Difference]: Start difference. First operand 606 states and 2011 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:16,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:16,256 INFO L93 Difference]: Finished difference Result 1221 states and 3751 transitions. [2021-06-12 20:37:16,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:37:16,257 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:37:16,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:16,266 INFO L225 Difference]: With dead ends: 1221 [2021-06-12 20:37:16,266 INFO L226 Difference]: Without dead ends: 1221 [2021-06-12 20:37:16,266 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:37:16,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-06-12 20:37:16,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 650. [2021-06-12 20:37:16,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 3.362095531587057) internal successors, (2182), 649 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:16,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 2182 transitions. [2021-06-12 20:37:16,277 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 2182 transitions. Word has length 22 [2021-06-12 20:37:16,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:16,277 INFO L482 AbstractCegarLoop]: Abstraction has 650 states and 2182 transitions. [2021-06-12 20:37:16,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:16,277 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 2182 transitions. [2021-06-12 20:37:16,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:37:16,278 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:16,278 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:16,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:16,493 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:16,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:16,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1657114921, now seen corresponding path program 29 times [2021-06-12 20:37:16,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:16,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886674634] [2021-06-12 20:37:16,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:16,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:16,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:16,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:16,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886674634] [2021-06-12 20:37:16,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886674634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:16,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270621964] [2021-06-12 20:37:16,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:16,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:37:16,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:16,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:37:16,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:16,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270621964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:16,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:16,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-12 20:37:16,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588695730] [2021-06-12 20:37:16,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:37:16,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:16,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:37:16,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:37:16,601 INFO L87 Difference]: Start difference. First operand 650 states and 2182 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:16,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:16,733 INFO L93 Difference]: Finished difference Result 1386 states and 4279 transitions. [2021-06-12 20:37:16,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:37:16,734 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:37:16,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:16,736 INFO L225 Difference]: With dead ends: 1386 [2021-06-12 20:37:16,736 INFO L226 Difference]: Without dead ends: 1386 [2021-06-12 20:37:16,737 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:37:16,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2021-06-12 20:37:16,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 762. [2021-06-12 20:37:16,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.4480946123521683) internal successors, (2624), 761 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:16,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2624 transitions. [2021-06-12 20:37:16,750 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2624 transitions. Word has length 22 [2021-06-12 20:37:16,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:16,750 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 2624 transitions. [2021-06-12 20:37:16,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:16,750 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2624 transitions. [2021-06-12 20:37:16,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:37:16,751 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:16,751 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:16,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:16,965 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:16,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:16,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1144148055, now seen corresponding path program 30 times [2021-06-12 20:37:16,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:16,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034032619] [2021-06-12 20:37:16,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:16,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:16,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:37:16,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:16,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034032619] [2021-06-12 20:37:16,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034032619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:16,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596485038] [2021-06-12 20:37:16,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:17,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:37:17,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:17,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:37:17,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:17,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:17,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596485038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:17,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:17,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-12 20:37:17,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122686553] [2021-06-12 20:37:17,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:37:17,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:17,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:37:17,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:37:17,085 INFO L87 Difference]: Start difference. First operand 762 states and 2624 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:17,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:17,257 INFO L93 Difference]: Finished difference Result 1253 states and 3889 transitions. [2021-06-12 20:37:17,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:37:17,258 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:37:17,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:17,260 INFO L225 Difference]: With dead ends: 1253 [2021-06-12 20:37:17,260 INFO L226 Difference]: Without dead ends: 1244 [2021-06-12 20:37:17,260 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:37:17,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2021-06-12 20:37:17,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 762. [2021-06-12 20:37:17,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.4191852825229962) internal successors, (2602), 761 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:17,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2602 transitions. [2021-06-12 20:37:17,271 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2602 transitions. Word has length 22 [2021-06-12 20:37:17,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:17,271 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 2602 transitions. [2021-06-12 20:37:17,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:17,272 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2602 transitions. [2021-06-12 20:37:17,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:37:17,273 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:17,273 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:17,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:17,485 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:17,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:17,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1294632791, now seen corresponding path program 31 times [2021-06-12 20:37:17,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:17,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510515777] [2021-06-12 20:37:17,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:17,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:17,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:17,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510515777] [2021-06-12 20:37:17,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510515777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:17,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810661092] [2021-06-12 20:37:17,505 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:17,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:37:17,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:17,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810661092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:17,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:17,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 20:37:17,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15264416] [2021-06-12 20:37:17,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:37:17,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:17,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:37:17,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:37:17,579 INFO L87 Difference]: Start difference. First operand 762 states and 2602 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:17,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:17,731 INFO L93 Difference]: Finished difference Result 1263 states and 4021 transitions. [2021-06-12 20:37:17,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:37:17,731 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:37:17,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:17,733 INFO L225 Difference]: With dead ends: 1263 [2021-06-12 20:37:17,734 INFO L226 Difference]: Without dead ends: 1251 [2021-06-12 20:37:17,734 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 111.4ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:37:17,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-06-12 20:37:17,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 847. [2021-06-12 20:37:17,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 3.4539007092198584) internal successors, (2922), 846 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:17,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 2922 transitions. [2021-06-12 20:37:17,745 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 2922 transitions. Word has length 22 [2021-06-12 20:37:17,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:17,745 INFO L482 AbstractCegarLoop]: Abstraction has 847 states and 2922 transitions. [2021-06-12 20:37:17,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:17,746 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 2922 transitions. [2021-06-12 20:37:17,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:37:17,747 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:17,747 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:17,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:17,963 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:17,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:17,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1456964799, now seen corresponding path program 32 times [2021-06-12 20:37:17,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:17,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955935660] [2021-06-12 20:37:17,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:17,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:17,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:17,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:17,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955935660] [2021-06-12 20:37:17,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955935660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:17,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527628793] [2021-06-12 20:37:17,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:18,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:37:18,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:18,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:37:18,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:18,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527628793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:18,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:18,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 20:37:18,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400037358] [2021-06-12 20:37:18,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:37:18,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:18,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:37:18,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:37:18,064 INFO L87 Difference]: Start difference. First operand 847 states and 2922 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:18,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:18,191 INFO L93 Difference]: Finished difference Result 1246 states and 3991 transitions. [2021-06-12 20:37:18,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:37:18,192 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:37:18,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:18,194 INFO L225 Difference]: With dead ends: 1246 [2021-06-12 20:37:18,194 INFO L226 Difference]: Without dead ends: 1246 [2021-06-12 20:37:18,194 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:37:18,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2021-06-12 20:37:18,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 888. [2021-06-12 20:37:18,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.47576099210823) internal successors, (3083), 887 states have internal predecessors, (3083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:18,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3083 transitions. [2021-06-12 20:37:18,206 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3083 transitions. Word has length 22 [2021-06-12 20:37:18,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:18,206 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3083 transitions. [2021-06-12 20:37:18,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:18,206 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3083 transitions. [2021-06-12 20:37:18,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:37:18,207 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:18,207 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:18,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:18,408 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:18,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:18,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1570199292, now seen corresponding path program 33 times [2021-06-12 20:37:18,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:18,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720862295] [2021-06-12 20:37:18,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:18,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:18,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:18,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:18,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720862295] [2021-06-12 20:37:18,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720862295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:18,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950763576] [2021-06-12 20:37:18,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:18,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:37:18,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:18,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:37:18,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:18,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:18,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950763576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:18,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:18,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 20:37:18,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156052549] [2021-06-12 20:37:18,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:37:18,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:18,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:37:18,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:37:18,518 INFO L87 Difference]: Start difference. First operand 888 states and 3083 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:18,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:18,700 INFO L93 Difference]: Finished difference Result 1362 states and 4328 transitions. [2021-06-12 20:37:18,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:37:18,700 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:37:18,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:18,709 INFO L225 Difference]: With dead ends: 1362 [2021-06-12 20:37:18,709 INFO L226 Difference]: Without dead ends: 1275 [2021-06-12 20:37:18,709 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 139.0ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:37:18,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-06-12 20:37:18,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 976. [2021-06-12 20:37:18,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 975 states have (on average 3.4574358974358974) internal successors, (3371), 975 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:18,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 3371 transitions. [2021-06-12 20:37:18,728 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 3371 transitions. Word has length 22 [2021-06-12 20:37:18,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:18,728 INFO L482 AbstractCegarLoop]: Abstraction has 976 states and 3371 transitions. [2021-06-12 20:37:18,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:18,728 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 3371 transitions. [2021-06-12 20:37:18,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:37:18,730 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:18,730 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:18,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:18,945 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:18,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:18,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1138465271, now seen corresponding path program 34 times [2021-06-12 20:37:18,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:18,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602182111] [2021-06-12 20:37:18,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:18,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:18,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:18,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:18,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602182111] [2021-06-12 20:37:18,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602182111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:18,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898740622] [2021-06-12 20:37:18,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:18,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:37:18,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:18,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:37:18,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:19,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:19,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898740622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:19,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:19,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-12 20:37:19,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273960831] [2021-06-12 20:37:19,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:37:19,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:19,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:37:19,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:37:19,033 INFO L87 Difference]: Start difference. First operand 976 states and 3371 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:19,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:19,167 INFO L93 Difference]: Finished difference Result 1340 states and 4319 transitions. [2021-06-12 20:37:19,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:37:19,167 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:37:19,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:19,169 INFO L225 Difference]: With dead ends: 1340 [2021-06-12 20:37:19,169 INFO L226 Difference]: Without dead ends: 1331 [2021-06-12 20:37:19,169 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 74.8ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:37:19,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2021-06-12 20:37:19,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 928. [2021-06-12 20:37:19,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 3.4217907227615965) internal successors, (3172), 927 states have internal predecessors, (3172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:19,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 3172 transitions. [2021-06-12 20:37:19,181 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 3172 transitions. Word has length 22 [2021-06-12 20:37:19,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:19,181 INFO L482 AbstractCegarLoop]: Abstraction has 928 states and 3172 transitions. [2021-06-12 20:37:19,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:19,181 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 3172 transitions. [2021-06-12 20:37:19,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:37:19,183 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:19,183 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:19,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:19,383 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:19,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:19,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1510891700, now seen corresponding path program 35 times [2021-06-12 20:37:19,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:19,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036749286] [2021-06-12 20:37:19,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:19,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:19,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:19,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036749286] [2021-06-12 20:37:19,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036749286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:19,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021116100] [2021-06-12 20:37:19,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:19,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:37:19,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:19,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:37:19,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:19,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:19,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021116100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:19,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:19,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-12 20:37:19,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229121481] [2021-06-12 20:37:19,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:37:19,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:19,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:37:19,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:37:19,483 INFO L87 Difference]: Start difference. First operand 928 states and 3172 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:19,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:19,588 INFO L93 Difference]: Finished difference Result 1477 states and 4669 transitions. [2021-06-12 20:37:19,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:37:19,589 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:37:19,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:19,591 INFO L225 Difference]: With dead ends: 1477 [2021-06-12 20:37:19,591 INFO L226 Difference]: Without dead ends: 1435 [2021-06-12 20:37:19,591 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:37:19,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2021-06-12 20:37:19,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1075. [2021-06-12 20:37:19,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1075 states, 1074 states have (on average 3.4320297951582868) internal successors, (3686), 1074 states have internal predecessors, (3686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:19,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1075 states to 1075 states and 3686 transitions. [2021-06-12 20:37:19,614 INFO L78 Accepts]: Start accepts. Automaton has 1075 states and 3686 transitions. Word has length 22 [2021-06-12 20:37:19,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:19,615 INFO L482 AbstractCegarLoop]: Abstraction has 1075 states and 3686 transitions. [2021-06-12 20:37:19,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:19,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1075 states and 3686 transitions. [2021-06-12 20:37:19,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:37:19,617 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:19,617 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:19,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-06-12 20:37:19,825 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:19,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:19,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1381268681, now seen corresponding path program 36 times [2021-06-12 20:37:19,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:19,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507821733] [2021-06-12 20:37:19,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:19,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:19,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:19,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:19,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507821733] [2021-06-12 20:37:19,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507821733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:19,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259339952] [2021-06-12 20:37:19,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:19,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:37:19,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:19,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:37:19,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:19,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:19,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259339952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:19,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:19,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-12 20:37:19,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774289869] [2021-06-12 20:37:19,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:37:19,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:19,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:37:19,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:37:19,924 INFO L87 Difference]: Start difference. First operand 1075 states and 3686 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:20,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:20,028 INFO L93 Difference]: Finished difference Result 1825 states and 5875 transitions. [2021-06-12 20:37:20,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:37:20,029 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:37:20,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:20,031 INFO L225 Difference]: With dead ends: 1825 [2021-06-12 20:37:20,032 INFO L226 Difference]: Without dead ends: 1825 [2021-06-12 20:37:20,032 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 66.0ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:37:20,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2021-06-12 20:37:20,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 1237. [2021-06-12 20:37:20,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1236 states have (on average 3.5032362459546924) internal successors, (4330), 1236 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:20,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 4330 transitions. [2021-06-12 20:37:20,049 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 4330 transitions. Word has length 22 [2021-06-12 20:37:20,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:20,050 INFO L482 AbstractCegarLoop]: Abstraction has 1237 states and 4330 transitions. [2021-06-12 20:37:20,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:20,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 4330 transitions. [2021-06-12 20:37:20,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:37:20,051 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:20,051 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:20,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:20,263 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:20,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:20,263 INFO L82 PathProgramCache]: Analyzing trace with hash 495943756, now seen corresponding path program 37 times [2021-06-12 20:37:20,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:20,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265333157] [2021-06-12 20:37:20,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:20,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:20,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:20,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265333157] [2021-06-12 20:37:20,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265333157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:20,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645689180] [2021-06-12 20:37:20,280 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:20,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:20,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:37:20,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:20,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:20,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645689180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:20,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:20,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-12 20:37:20,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898782443] [2021-06-12 20:37:20,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:37:20,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:20,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:37:20,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:37:20,359 INFO L87 Difference]: Start difference. First operand 1237 states and 4330 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:20,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:20,510 INFO L93 Difference]: Finished difference Result 1507 states and 5030 transitions. [2021-06-12 20:37:20,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:37:20,510 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:37:20,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:20,513 INFO L225 Difference]: With dead ends: 1507 [2021-06-12 20:37:20,513 INFO L226 Difference]: Without dead ends: 1464 [2021-06-12 20:37:20,513 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 99.7ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:37:20,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-06-12 20:37:20,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1278. [2021-06-12 20:37:20,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 1277 states have (on average 3.534064212999217) internal successors, (4513), 1277 states have internal predecessors, (4513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:20,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 4513 transitions. [2021-06-12 20:37:20,548 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 4513 transitions. Word has length 22 [2021-06-12 20:37:20,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:20,549 INFO L482 AbstractCegarLoop]: Abstraction has 1278 states and 4513 transitions. [2021-06-12 20:37:20,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:20,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 4513 transitions. [2021-06-12 20:37:20,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:37:20,550 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:20,551 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:20,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-12 20:37:20,765 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:20,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:20,765 INFO L82 PathProgramCache]: Analyzing trace with hash -112435639, now seen corresponding path program 38 times [2021-06-12 20:37:20,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:20,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339625311] [2021-06-12 20:37:20,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:20,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:20,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:37:20,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:20,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339625311] [2021-06-12 20:37:20,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339625311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:20,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812870368] [2021-06-12 20:37:20,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:20,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:37:20,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:20,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:37:20,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:20,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:20,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812870368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:20,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:20,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-12 20:37:20,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226968876] [2021-06-12 20:37:20,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:37:20,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:20,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:37:20,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:37:20,874 INFO L87 Difference]: Start difference. First operand 1278 states and 4513 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:21,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:21,010 INFO L93 Difference]: Finished difference Result 1841 states and 5998 transitions. [2021-06-12 20:37:21,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:37:21,010 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:37:21,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:21,013 INFO L225 Difference]: With dead ends: 1841 [2021-06-12 20:37:21,013 INFO L226 Difference]: Without dead ends: 1832 [2021-06-12 20:37:21,013 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:37:21,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-06-12 20:37:21,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1224. [2021-06-12 20:37:21,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1223 states have (on average 3.493049877350777) internal successors, (4272), 1223 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:21,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 4272 transitions. [2021-06-12 20:37:21,032 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 4272 transitions. Word has length 22 [2021-06-12 20:37:21,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:21,032 INFO L482 AbstractCegarLoop]: Abstraction has 1224 states and 4272 transitions. [2021-06-12 20:37:21,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:21,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 4272 transitions. [2021-06-12 20:37:21,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:37:21,034 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:21,034 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:21,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:21,234 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:21,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:21,235 INFO L82 PathProgramCache]: Analyzing trace with hash 38049097, now seen corresponding path program 39 times [2021-06-12 20:37:21,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:21,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462186084] [2021-06-12 20:37:21,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:21,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:21,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:21,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462186084] [2021-06-12 20:37:21,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462186084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:21,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888076548] [2021-06-12 20:37:21,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:21,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:37:21,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:21,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:37:21,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:21,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:21,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888076548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:21,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:21,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 20:37:21,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757607546] [2021-06-12 20:37:21,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:37:21,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:21,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:37:21,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:37:21,349 INFO L87 Difference]: Start difference. First operand 1224 states and 4272 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:21,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:21,494 INFO L93 Difference]: Finished difference Result 1811 states and 5904 transitions. [2021-06-12 20:37:21,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:37:21,498 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:37:21,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:21,501 INFO L225 Difference]: With dead ends: 1811 [2021-06-12 20:37:21,501 INFO L226 Difference]: Without dead ends: 1799 [2021-06-12 20:37:21,501 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:37:21,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2021-06-12 20:37:21,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1222. [2021-06-12 20:37:21,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1221 states have (on average 3.493038493038493) internal successors, (4265), 1221 states have internal predecessors, (4265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:21,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 4265 transitions. [2021-06-12 20:37:21,524 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 4265 transitions. Word has length 22 [2021-06-12 20:37:21,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:21,524 INFO L482 AbstractCegarLoop]: Abstraction has 1222 states and 4265 transitions. [2021-06-12 20:37:21,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:21,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 4265 transitions. [2021-06-12 20:37:21,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:37:21,526 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:21,526 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:21,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-12 20:37:21,734 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:21,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:21,734 INFO L82 PathProgramCache]: Analyzing trace with hash 414299473, now seen corresponding path program 40 times [2021-06-12 20:37:21,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:21,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54370449] [2021-06-12 20:37:21,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:21,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:21,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:21,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54370449] [2021-06-12 20:37:21,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54370449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:21,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341891248] [2021-06-12 20:37:21,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:21,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:37:21,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:21,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:37:21,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:21,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:21,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341891248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:21,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:21,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 20:37:21,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897498123] [2021-06-12 20:37:21,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:37:21,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:21,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:37:21,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:37:21,832 INFO L87 Difference]: Start difference. First operand 1222 states and 4265 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:21,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:21,946 INFO L93 Difference]: Finished difference Result 2184 states and 7117 transitions. [2021-06-12 20:37:21,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:37:21,947 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:37:21,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:21,950 INFO L225 Difference]: With dead ends: 2184 [2021-06-12 20:37:21,950 INFO L226 Difference]: Without dead ends: 2184 [2021-06-12 20:37:21,950 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:37:21,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2021-06-12 20:37:21,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 1282. [2021-06-12 20:37:21,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 3.527712724434036) internal successors, (4519), 1281 states have internal predecessors, (4519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:21,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 4519 transitions. [2021-06-12 20:37:21,973 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 4519 transitions. Word has length 22 [2021-06-12 20:37:21,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:21,973 INFO L482 AbstractCegarLoop]: Abstraction has 1282 states and 4519 transitions. [2021-06-12 20:37:21,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:21,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 4519 transitions. [2021-06-12 20:37:21,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:37:21,975 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:21,975 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:22,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:22,189 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:22,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:22,189 INFO L82 PathProgramCache]: Analyzing trace with hash -254499376, now seen corresponding path program 41 times [2021-06-12 20:37:22,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:22,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967096232] [2021-06-12 20:37:22,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:22,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:22,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:22,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:22,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967096232] [2021-06-12 20:37:22,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967096232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:22,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573491102] [2021-06-12 20:37:22,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:22,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:37:22,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:22,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:37:22,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:22,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:22,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573491102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:22,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:22,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 20:37:22,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188793768] [2021-06-12 20:37:22,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:37:22,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:22,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:37:22,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:37:22,284 INFO L87 Difference]: Start difference. First operand 1282 states and 4519 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:22,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:22,448 INFO L93 Difference]: Finished difference Result 1724 states and 5684 transitions. [2021-06-12 20:37:22,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:37:22,448 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:37:22,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:22,450 INFO L225 Difference]: With dead ends: 1724 [2021-06-12 20:37:22,450 INFO L226 Difference]: Without dead ends: 1690 [2021-06-12 20:37:22,450 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 102.7ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:37:22,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2021-06-12 20:37:22,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1281. [2021-06-12 20:37:22,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1280 states have (on average 3.51484375) internal successors, (4499), 1280 states have internal predecessors, (4499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:22,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 4499 transitions. [2021-06-12 20:37:22,475 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 4499 transitions. Word has length 22 [2021-06-12 20:37:22,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:22,475 INFO L482 AbstractCegarLoop]: Abstraction has 1281 states and 4499 transitions. [2021-06-12 20:37:22,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:22,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 4499 transitions. [2021-06-12 20:37:22,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:37:22,477 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:22,477 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:22,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-12 20:37:22,693 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:22,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:22,693 INFO L82 PathProgramCache]: Analyzing trace with hash -811023835, now seen corresponding path program 42 times [2021-06-12 20:37:22,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:22,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988535585] [2021-06-12 20:37:22,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:22,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:22,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:22,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:22,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988535585] [2021-06-12 20:37:22,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988535585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:22,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631934865] [2021-06-12 20:37:22,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:22,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:37:22,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:22,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:37:22,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:22,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:22,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631934865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:22,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:22,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 20:37:22,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305074480] [2021-06-12 20:37:22,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:37:22,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:22,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:37:22,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:37:22,784 INFO L87 Difference]: Start difference. First operand 1281 states and 4499 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:22,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:22,951 INFO L93 Difference]: Finished difference Result 2125 states and 6947 transitions. [2021-06-12 20:37:22,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:37:22,951 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:37:22,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:22,954 INFO L225 Difference]: With dead ends: 2125 [2021-06-12 20:37:22,954 INFO L226 Difference]: Without dead ends: 2116 [2021-06-12 20:37:22,954 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:37:22,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2116 states. [2021-06-12 20:37:22,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2116 to 1245. [2021-06-12 20:37:22,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1244 states have (on average 3.485530546623794) internal successors, (4336), 1244 states have internal predecessors, (4336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:22,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 4336 transitions. [2021-06-12 20:37:22,973 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 4336 transitions. Word has length 22 [2021-06-12 20:37:22,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:22,973 INFO L482 AbstractCegarLoop]: Abstraction has 1245 states and 4336 transitions. [2021-06-12 20:37:22,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:22,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 4336 transitions. [2021-06-12 20:37:22,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:37:22,974 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:22,974 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:23,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-12 20:37:23,185 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:23,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:23,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1183450264, now seen corresponding path program 43 times [2021-06-12 20:37:23,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:23,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426985780] [2021-06-12 20:37:23,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:23,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:23,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:23,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:23,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426985780] [2021-06-12 20:37:23,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426985780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:23,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447908689] [2021-06-12 20:37:23,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:23,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:23,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:37:23,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:23,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:23,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447908689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:23,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:23,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 20:37:23,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086133285] [2021-06-12 20:37:23,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:37:23,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:23,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:37:23,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:37:23,270 INFO L87 Difference]: Start difference. First operand 1245 states and 4336 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:23,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:23,375 INFO L93 Difference]: Finished difference Result 1497 states and 4889 transitions. [2021-06-12 20:37:23,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:37:23,375 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:37:23,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:23,377 INFO L225 Difference]: With dead ends: 1497 [2021-06-12 20:37:23,377 INFO L226 Difference]: Without dead ends: 1497 [2021-06-12 20:37:23,377 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:37:23,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2021-06-12 20:37:23,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1200. [2021-06-12 20:37:23,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1199 states have (on average 3.433694745621351) internal successors, (4117), 1199 states have internal predecessors, (4117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:23,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 4117 transitions. [2021-06-12 20:37:23,406 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 4117 transitions. Word has length 22 [2021-06-12 20:37:23,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:23,406 INFO L482 AbstractCegarLoop]: Abstraction has 1200 states and 4117 transitions. [2021-06-12 20:37:23,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:23,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 4117 transitions. [2021-06-12 20:37:23,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:37:23,407 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:23,407 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:23,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-12 20:37:23,608 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:23,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:23,608 INFO L82 PathProgramCache]: Analyzing trace with hash -496279263, now seen corresponding path program 44 times [2021-06-12 20:37:23,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:23,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856185612] [2021-06-12 20:37:23,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:23,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:23,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:23,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:23,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856185612] [2021-06-12 20:37:23,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856185612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:23,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204530295] [2021-06-12 20:37:23,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:23,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:37:23,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:23,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:37:23,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:23,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:23,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204530295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:23,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:23,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 20:37:23,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191264675] [2021-06-12 20:37:23,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:37:23,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:23,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:37:23,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:37:23,715 INFO L87 Difference]: Start difference. First operand 1200 states and 4117 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:23,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:23,839 INFO L93 Difference]: Finished difference Result 1698 states and 5519 transitions. [2021-06-12 20:37:23,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:37:23,839 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:37:23,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:23,841 INFO L225 Difference]: With dead ends: 1698 [2021-06-12 20:37:23,841 INFO L226 Difference]: Without dead ends: 1690 [2021-06-12 20:37:23,841 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 85.6ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:37:23,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2021-06-12 20:37:23,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1200. [2021-06-12 20:37:23,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1199 states have (on average 3.4286905754795662) internal successors, (4111), 1199 states have internal predecessors, (4111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:23,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 4111 transitions. [2021-06-12 20:37:23,859 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 4111 transitions. Word has length 22 [2021-06-12 20:37:23,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:23,859 INFO L482 AbstractCegarLoop]: Abstraction has 1200 states and 4111 transitions. [2021-06-12 20:37:23,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:23,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 4111 transitions. [2021-06-12 20:37:23,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:37:23,861 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:23,861 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:24,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:24,077 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:24,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:24,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1029973939, now seen corresponding path program 45 times [2021-06-12 20:37:24,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:24,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475090864] [2021-06-12 20:37:24,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:24,096 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:24,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:24,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475090864] [2021-06-12 20:37:24,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475090864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:24,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473050101] [2021-06-12 20:37:24,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:24,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:37:24,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:24,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:37:24,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:24,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:24,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473050101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:24,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:24,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 20:37:24,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354137982] [2021-06-12 20:37:24,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:37:24,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:24,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:37:24,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:37:24,157 INFO L87 Difference]: Start difference. First operand 1200 states and 4111 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:24,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:24,214 INFO L93 Difference]: Finished difference Result 1428 states and 4807 transitions. [2021-06-12 20:37:24,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:37:24,214 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:37:24,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:24,216 INFO L225 Difference]: With dead ends: 1428 [2021-06-12 20:37:24,216 INFO L226 Difference]: Without dead ends: 1419 [2021-06-12 20:37:24,216 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:37:24,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2021-06-12 20:37:24,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 1199. [2021-06-12 20:37:24,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1198 states have (on average 3.4298831385642736) internal successors, (4109), 1198 states have internal predecessors, (4109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:24,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 4109 transitions. [2021-06-12 20:37:24,229 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 4109 transitions. Word has length 22 [2021-06-12 20:37:24,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:24,229 INFO L482 AbstractCegarLoop]: Abstraction has 1199 states and 4109 transitions. [2021-06-12 20:37:24,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:24,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 4109 transitions. [2021-06-12 20:37:24,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:37:24,231 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:24,231 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:24,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-12 20:37:24,433 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:24,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:24,433 INFO L82 PathProgramCache]: Analyzing trace with hash -736606674, now seen corresponding path program 46 times [2021-06-12 20:37:24,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:24,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186662616] [2021-06-12 20:37:24,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:24,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:24,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:24,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186662616] [2021-06-12 20:37:24,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186662616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:24,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596752235] [2021-06-12 20:37:24,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:24,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:37:24,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:24,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:37:24,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:24,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:24,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596752235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:24,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:24,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 20:37:24,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361137498] [2021-06-12 20:37:24,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:37:24,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:24,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:37:24,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:37:24,567 INFO L87 Difference]: Start difference. First operand 1199 states and 4109 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:24,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:24,628 INFO L93 Difference]: Finished difference Result 1470 states and 4948 transitions. [2021-06-12 20:37:24,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:37:24,628 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:37:24,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:24,630 INFO L225 Difference]: With dead ends: 1470 [2021-06-12 20:37:24,630 INFO L226 Difference]: Without dead ends: 1470 [2021-06-12 20:37:24,630 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:37:24,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2021-06-12 20:37:24,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1208. [2021-06-12 20:37:24,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1207 states have (on average 3.432477216238608) internal successors, (4143), 1207 states have internal predecessors, (4143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:24,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 4143 transitions. [2021-06-12 20:37:24,645 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 4143 transitions. Word has length 22 [2021-06-12 20:37:24,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:24,645 INFO L482 AbstractCegarLoop]: Abstraction has 1208 states and 4143 transitions. [2021-06-12 20:37:24,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:24,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 4143 transitions. [2021-06-12 20:37:24,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:37:24,647 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:24,647 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:24,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:24,847 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:24,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:24,848 INFO L82 PathProgramCache]: Analyzing trace with hash -834579384, now seen corresponding path program 47 times [2021-06-12 20:37:24,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:24,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203124483] [2021-06-12 20:37:24,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:24,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:25,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:25,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:25,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203124483] [2021-06-12 20:37:25,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203124483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:25,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012183896] [2021-06-12 20:37:25,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:25,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:37:25,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:25,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:37:25,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:25,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:37:25,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:25,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:25,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:25,196 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-12 20:37:25,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:25,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012183896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:25,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:25,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:37:25,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498945825] [2021-06-12 20:37:25,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:37:25,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:25,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:37:25,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:37:25,224 INFO L87 Difference]: Start difference. First operand 1208 states and 4143 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:28,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:28,526 INFO L93 Difference]: Finished difference Result 4448 states and 15165 transitions. [2021-06-12 20:37:28,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-12 20:37:28,526 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:37:28,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:28,532 INFO L225 Difference]: With dead ends: 4448 [2021-06-12 20:37:28,532 INFO L226 Difference]: Without dead ends: 4426 [2021-06-12 20:37:28,533 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2192 ImplicationChecksByTransitivity, 2608.2ms TimeCoverageRelationStatistics Valid=1022, Invalid=5620, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 20:37:28,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4426 states. [2021-06-12 20:37:28,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4426 to 1303. [2021-06-12 20:37:28,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1302 states have (on average 3.4400921658986174) internal successors, (4479), 1302 states have internal predecessors, (4479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:28,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 4479 transitions. [2021-06-12 20:37:28,566 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 4479 transitions. Word has length 24 [2021-06-12 20:37:28,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:28,566 INFO L482 AbstractCegarLoop]: Abstraction has 1303 states and 4479 transitions. [2021-06-12 20:37:28,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:28,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 4479 transitions. [2021-06-12 20:37:28,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:37:28,568 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:28,568 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:28,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-12 20:37:28,784 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:28,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:28,784 INFO L82 PathProgramCache]: Analyzing trace with hash 965720304, now seen corresponding path program 48 times [2021-06-12 20:37:28,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:28,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256139232] [2021-06-12 20:37:28,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:28,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:28,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:28,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256139232] [2021-06-12 20:37:28,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256139232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:28,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826040919] [2021-06-12 20:37:28,983 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:29,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:37:29,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:29,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 20:37:29,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:29,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:29,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:29,193 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:29,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 53 [2021-06-12 20:37:29,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:29,237 INFO L628 ElimStorePlain]: treesize reduction 37, result has 49.3 percent of original size [2021-06-12 20:37:29,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:29,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:41 [2021-06-12 20:37:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:29,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826040919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:29,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:29,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-06-12 20:37:29,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404152437] [2021-06-12 20:37:29,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:37:29,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:29,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:37:29,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:37:29,349 INFO L87 Difference]: Start difference. First operand 1303 states and 4479 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:32,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:32,139 INFO L93 Difference]: Finished difference Result 2829 states and 9372 transitions. [2021-06-12 20:37:32,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 20:37:32,140 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:37:32,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:32,143 INFO L225 Difference]: With dead ends: 2829 [2021-06-12 20:37:32,144 INFO L226 Difference]: Without dead ends: 2799 [2021-06-12 20:37:32,144 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1118 ImplicationChecksByTransitivity, 2200.7ms TimeCoverageRelationStatistics Valid=661, Invalid=3121, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 20:37:32,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2799 states. [2021-06-12 20:37:32,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2799 to 1316. [2021-06-12 20:37:32,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1316 states, 1315 states have (on average 3.4403041825095055) internal successors, (4524), 1315 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:32,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1316 states to 1316 states and 4524 transitions. [2021-06-12 20:37:32,167 INFO L78 Accepts]: Start accepts. Automaton has 1316 states and 4524 transitions. Word has length 24 [2021-06-12 20:37:32,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:32,167 INFO L482 AbstractCegarLoop]: Abstraction has 1316 states and 4524 transitions. [2021-06-12 20:37:32,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:32,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1316 states and 4524 transitions. [2021-06-12 20:37:32,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:37:32,169 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:32,169 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:32,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:32,369 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:32,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:32,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1186871304, now seen corresponding path program 49 times [2021-06-12 20:37:32,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:32,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984013060] [2021-06-12 20:37:32,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:32,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:32,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:32,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984013060] [2021-06-12 20:37:32,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984013060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:32,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794205697] [2021-06-12 20:37:32,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:32,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:37:32,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:32,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:37:32,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:32,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:32,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:32,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:37:32,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:32,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794205697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:32,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:32,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:37:32,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006307917] [2021-06-12 20:37:32,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:37:32,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:32,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:37:32,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:37:32,752 INFO L87 Difference]: Start difference. First operand 1316 states and 4524 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:34,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:34,376 INFO L93 Difference]: Finished difference Result 2754 states and 9152 transitions. [2021-06-12 20:37:34,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 20:37:34,376 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:37:34,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:34,380 INFO L225 Difference]: With dead ends: 2754 [2021-06-12 20:37:34,380 INFO L226 Difference]: Without dead ends: 2720 [2021-06-12 20:37:34,380 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1205.6ms TimeCoverageRelationStatistics Valid=379, Invalid=2171, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:37:34,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2720 states. [2021-06-12 20:37:34,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2720 to 1330. [2021-06-12 20:37:34,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1329 states have (on average 3.443190368698269) internal successors, (4576), 1329 states have internal predecessors, (4576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:34,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 4576 transitions. [2021-06-12 20:37:34,400 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 4576 transitions. Word has length 24 [2021-06-12 20:37:34,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:34,400 INFO L482 AbstractCegarLoop]: Abstraction has 1330 states and 4576 transitions. [2021-06-12 20:37:34,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:34,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 4576 transitions. [2021-06-12 20:37:34,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:37:34,402 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:34,402 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:34,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:34,602 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:34,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:34,603 INFO L82 PathProgramCache]: Analyzing trace with hash 749372208, now seen corresponding path program 50 times [2021-06-12 20:37:34,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:34,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851708631] [2021-06-12 20:37:34,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:34,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:34,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851708631] [2021-06-12 20:37:34,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851708631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:34,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801888385] [2021-06-12 20:37:34,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:34,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:37:34,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:34,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 20:37:34,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:34,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:37:34,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:35,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:35,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:35,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:15 [2021-06-12 20:37:35,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:35,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801888385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:35,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:35,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:37:35,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268833396] [2021-06-12 20:37:35,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:37:35,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:35,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:37:35,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:37:35,061 INFO L87 Difference]: Start difference. First operand 1330 states and 4576 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:36,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:36,062 INFO L93 Difference]: Finished difference Result 2450 states and 8194 transitions. [2021-06-12 20:37:36,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:37:36,063 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:37:36,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:36,066 INFO L225 Difference]: With dead ends: 2450 [2021-06-12 20:37:36,066 INFO L226 Difference]: Without dead ends: 2391 [2021-06-12 20:37:36,066 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 851.3ms TimeCoverageRelationStatistics Valid=289, Invalid=1517, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:37:36,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-06-12 20:37:36,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1349. [2021-06-12 20:37:36,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 3.438427299703264) internal successors, (4635), 1348 states have internal predecessors, (4635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:36,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 4635 transitions. [2021-06-12 20:37:36,087 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 4635 transitions. Word has length 24 [2021-06-12 20:37:36,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:36,087 INFO L482 AbstractCegarLoop]: Abstraction has 1349 states and 4635 transitions. [2021-06-12 20:37:36,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:36,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 4635 transitions. [2021-06-12 20:37:36,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:37:36,089 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:36,089 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:36,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:36,290 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:36,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:36,291 INFO L82 PathProgramCache]: Analyzing trace with hash 572830776, now seen corresponding path program 51 times [2021-06-12 20:37:36,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:36,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868741576] [2021-06-12 20:37:36,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:36,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:36,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:36,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:36,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868741576] [2021-06-12 20:37:36,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868741576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:36,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696359303] [2021-06-12 20:37:36,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:36,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:37:36,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:36,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:37:36,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:36,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:36,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:36,707 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:36,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-12 20:37:36,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:36,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:36,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:36,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:50 [2021-06-12 20:37:36,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:36,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696359303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:36,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:36,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:37:36,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378047456] [2021-06-12 20:37:36,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:37:36,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:36,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:37:36,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:37:36,895 INFO L87 Difference]: Start difference. First operand 1349 states and 4635 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:38,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:38,711 INFO L93 Difference]: Finished difference Result 2472 states and 8251 transitions. [2021-06-12 20:37:38,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 20:37:38,712 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:37:38,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:38,715 INFO L225 Difference]: With dead ends: 2472 [2021-06-12 20:37:38,715 INFO L226 Difference]: Without dead ends: 2452 [2021-06-12 20:37:38,716 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1563.7ms TimeCoverageRelationStatistics Valid=478, Invalid=2602, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 20:37:38,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2021-06-12 20:37:38,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 1352. [2021-06-12 20:37:38,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 3.4374537379718726) internal successors, (4644), 1351 states have internal predecessors, (4644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:38,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 4644 transitions. [2021-06-12 20:37:38,738 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 4644 transitions. Word has length 24 [2021-06-12 20:37:38,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:38,738 INFO L482 AbstractCegarLoop]: Abstraction has 1352 states and 4644 transitions. [2021-06-12 20:37:38,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:38,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 4644 transitions. [2021-06-12 20:37:38,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:37:38,740 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:38,740 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:38,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:38,956 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:38,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:38,956 INFO L82 PathProgramCache]: Analyzing trace with hash -260907664, now seen corresponding path program 52 times [2021-06-12 20:37:38,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:38,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503209748] [2021-06-12 20:37:38,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:38,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:39,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:39,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:39,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503209748] [2021-06-12 20:37:39,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503209748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:39,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827085054] [2021-06-12 20:37:39,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:39,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:37:39,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:39,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:37:39,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:39,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:37:39,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:39,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:39,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:39,324 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:37:39,372 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:39,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827085054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:39,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:39,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:37:39,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989733670] [2021-06-12 20:37:39,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:37:39,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:39,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:37:39,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:37:39,373 INFO L87 Difference]: Start difference. First operand 1352 states and 4644 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:40,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:40,411 INFO L93 Difference]: Finished difference Result 2456 states and 8262 transitions. [2021-06-12 20:37:40,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:37:40,412 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:37:40,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:40,415 INFO L225 Difference]: With dead ends: 2456 [2021-06-12 20:37:40,415 INFO L226 Difference]: Without dead ends: 2445 [2021-06-12 20:37:40,415 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 801.4ms TimeCoverageRelationStatistics Valid=271, Invalid=1451, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:37:40,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2021-06-12 20:37:40,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 1353. [2021-06-12 20:37:40,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1352 states have (on average 3.44008875739645) internal successors, (4651), 1352 states have internal predecessors, (4651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:40,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 4651 transitions. [2021-06-12 20:37:40,435 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 4651 transitions. Word has length 24 [2021-06-12 20:37:40,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:40,436 INFO L482 AbstractCegarLoop]: Abstraction has 1353 states and 4651 transitions. [2021-06-12 20:37:40,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:40,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 4651 transitions. [2021-06-12 20:37:40,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:37:40,438 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:40,438 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:40,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:40,655 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:40,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:40,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1760921938, now seen corresponding path program 1 times [2021-06-12 20:37:40,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:40,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833561944] [2021-06-12 20:37:40,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:40,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:40,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:40,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833561944] [2021-06-12 20:37:40,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833561944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:40,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416720519] [2021-06-12 20:37:40,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:40,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:40,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:37:40,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:41,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:37:41,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:41,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:41,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:41,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-12 20:37:41,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:41,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416720519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:41,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:41,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:37:41,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859001058] [2021-06-12 20:37:41,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:37:41,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:41,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:37:41,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:37:41,092 INFO L87 Difference]: Start difference. First operand 1353 states and 4651 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:44,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:44,026 INFO L93 Difference]: Finished difference Result 3805 states and 13021 transitions. [2021-06-12 20:37:44,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 20:37:44,026 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:37:44,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:44,032 INFO L225 Difference]: With dead ends: 3805 [2021-06-12 20:37:44,032 INFO L226 Difference]: Without dead ends: 3786 [2021-06-12 20:37:44,033 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 2337.7ms TimeCoverageRelationStatistics Valid=761, Invalid=4351, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 20:37:44,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2021-06-12 20:37:44,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 1388. [2021-06-12 20:37:44,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 3.4491708723864454) internal successors, (4784), 1387 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:44,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 4784 transitions. [2021-06-12 20:37:44,060 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 4784 transitions. Word has length 24 [2021-06-12 20:37:44,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:44,060 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 4784 transitions. [2021-06-12 20:37:44,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:44,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 4784 transitions. [2021-06-12 20:37:44,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:37:44,062 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:44,062 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:44,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:44,264 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:44,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:44,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1251406074, now seen corresponding path program 2 times [2021-06-12 20:37:44,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:44,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002517175] [2021-06-12 20:37:44,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:44,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:44,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:44,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:44,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002517175] [2021-06-12 20:37:44,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002517175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:44,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865751092] [2021-06-12 20:37:44,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:44,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:37:44,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:44,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:37:44,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:44,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:44,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:37:44,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:37:44,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:44,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:44,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:44,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 20:37:44,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:44,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865751092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:44,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:44,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:37:44,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363782744] [2021-06-12 20:37:44,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:37:44,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:44,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:37:44,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:37:44,717 INFO L87 Difference]: Start difference. First operand 1388 states and 4784 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:46,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:46,151 INFO L93 Difference]: Finished difference Result 2357 states and 8002 transitions. [2021-06-12 20:37:46,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:37:46,152 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:37:46,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:46,155 INFO L225 Difference]: With dead ends: 2357 [2021-06-12 20:37:46,155 INFO L226 Difference]: Without dead ends: 2348 [2021-06-12 20:37:46,155 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1193.9ms TimeCoverageRelationStatistics Valid=376, Invalid=2276, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 20:37:46,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-06-12 20:37:46,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 1398. [2021-06-12 20:37:46,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 3.45025053686471) internal successors, (4820), 1397 states have internal predecessors, (4820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:46,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4820 transitions. [2021-06-12 20:37:46,174 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4820 transitions. Word has length 24 [2021-06-12 20:37:46,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:46,174 INFO L482 AbstractCegarLoop]: Abstraction has 1398 states and 4820 transitions. [2021-06-12 20:37:46,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:46,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4820 transitions. [2021-06-12 20:37:46,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:37:46,176 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:46,176 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:46,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-12 20:37:46,376 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:46,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:46,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1041868694, now seen corresponding path program 3 times [2021-06-12 20:37:46,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:46,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183987085] [2021-06-12 20:37:46,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:46,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:46,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:46,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183987085] [2021-06-12 20:37:46,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183987085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:46,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859522225] [2021-06-12 20:37:46,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:46,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:37:46,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:46,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:37:46,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:46,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:37:46,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:46,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:46,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:46,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-12 20:37:46,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:46,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859522225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:46,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:46,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:37:46,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267828572] [2021-06-12 20:37:46,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:37:46,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:46,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:37:46,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:37:46,748 INFO L87 Difference]: Start difference. First operand 1398 states and 4820 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:48,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:48,197 INFO L93 Difference]: Finished difference Result 2538 states and 8518 transitions. [2021-06-12 20:37:48,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:37:48,198 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:37:48,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:48,201 INFO L225 Difference]: With dead ends: 2538 [2021-06-12 20:37:48,201 INFO L226 Difference]: Without dead ends: 2509 [2021-06-12 20:37:48,202 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1105.8ms TimeCoverageRelationStatistics Valid=348, Invalid=2004, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 20:37:48,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2021-06-12 20:37:48,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 1408. [2021-06-12 20:37:48,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1407 states have (on average 3.4534470504619756) internal successors, (4859), 1407 states have internal predecessors, (4859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:48,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 4859 transitions. [2021-06-12 20:37:48,225 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 4859 transitions. Word has length 24 [2021-06-12 20:37:48,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:48,225 INFO L482 AbstractCegarLoop]: Abstraction has 1408 states and 4859 transitions. [2021-06-12 20:37:48,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:48,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 4859 transitions. [2021-06-12 20:37:48,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:37:48,227 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:48,227 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:48,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-12 20:37:48,441 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:48,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:48,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1524426856, now seen corresponding path program 4 times [2021-06-12 20:37:48,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:48,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741669902] [2021-06-12 20:37:48,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:48,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:48,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:48,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:48,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741669902] [2021-06-12 20:37:48,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741669902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:48,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588789291] [2021-06-12 20:37:48,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:48,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:37:48,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:48,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:37:48,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:48,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:37:48,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:48,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:48,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:48,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:37:48,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:48,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588789291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:48,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:48,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:37:48,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462835096] [2021-06-12 20:37:48,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:37:48,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:48,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:37:48,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:37:48,813 INFO L87 Difference]: Start difference. First operand 1408 states and 4859 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:50,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:50,134 INFO L93 Difference]: Finished difference Result 2473 states and 8324 transitions. [2021-06-12 20:37:50,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:37:50,134 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:37:50,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:50,137 INFO L225 Difference]: With dead ends: 2473 [2021-06-12 20:37:50,137 INFO L226 Difference]: Without dead ends: 2444 [2021-06-12 20:37:50,138 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1030.8ms TimeCoverageRelationStatistics Valid=348, Invalid=1908, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:37:50,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2021-06-12 20:37:50,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 1402. [2021-06-12 20:37:50,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1401 states have (on average 3.457530335474661) internal successors, (4844), 1401 states have internal predecessors, (4844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:50,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 4844 transitions. [2021-06-12 20:37:50,157 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 4844 transitions. Word has length 24 [2021-06-12 20:37:50,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:50,158 INFO L482 AbstractCegarLoop]: Abstraction has 1402 states and 4844 transitions. [2021-06-12 20:37:50,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:50,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 4844 transitions. [2021-06-12 20:37:50,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:37:50,159 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:50,160 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:50,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:50,360 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:50,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:50,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1742390580, now seen corresponding path program 5 times [2021-06-12 20:37:50,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:50,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523888446] [2021-06-12 20:37:50,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:50,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:50,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:50,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:50,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523888446] [2021-06-12 20:37:50,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523888446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:50,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204573029] [2021-06-12 20:37:50,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:50,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:37:50,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:50,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:37:50,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:50,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:37:50,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:50,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:50,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:50,674 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:37:50,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:50,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204573029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:50,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:50,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:37:50,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511386615] [2021-06-12 20:37:50,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:37:50,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:50,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:37:50,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:37:50,715 INFO L87 Difference]: Start difference. First operand 1402 states and 4844 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:51,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:51,439 INFO L93 Difference]: Finished difference Result 2298 states and 7819 transitions. [2021-06-12 20:37:51,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:37:51,440 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:37:51,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:51,442 INFO L225 Difference]: With dead ends: 2298 [2021-06-12 20:37:51,442 INFO L226 Difference]: Without dead ends: 2289 [2021-06-12 20:37:51,443 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 572.0ms TimeCoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:37:51,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2021-06-12 20:37:51,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 1415. [2021-06-12 20:37:51,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1415 states, 1414 states have (on average 3.454031117397454) internal successors, (4884), 1414 states have internal predecessors, (4884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:51,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1415 states to 1415 states and 4884 transitions. [2021-06-12 20:37:51,462 INFO L78 Accepts]: Start accepts. Automaton has 1415 states and 4884 transitions. Word has length 24 [2021-06-12 20:37:51,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:51,462 INFO L482 AbstractCegarLoop]: Abstraction has 1415 states and 4884 transitions. [2021-06-12 20:37:51,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:51,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1415 states and 4884 transitions. [2021-06-12 20:37:51,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:37:51,464 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:51,464 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:51,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:51,664 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:51,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:51,665 INFO L82 PathProgramCache]: Analyzing trace with hash 2065976758, now seen corresponding path program 6 times [2021-06-12 20:37:51,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:51,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741212377] [2021-06-12 20:37:51,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:51,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:51,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:51,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:51,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741212377] [2021-06-12 20:37:51,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741212377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:51,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546747354] [2021-06-12 20:37:51,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:51,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:37:51,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:51,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:37:51,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:51,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:51,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:51,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:51,995 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:51,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-06-12 20:37:51,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:52,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:52,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:52,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:88 [2021-06-12 20:37:52,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:52,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546747354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:52,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:52,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:37:52,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300830252] [2021-06-12 20:37:52,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:37:52,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:52,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:37:52,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:37:52,125 INFO L87 Difference]: Start difference. First operand 1415 states and 4884 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:53,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:53,791 INFO L93 Difference]: Finished difference Result 2286 states and 7759 transitions. [2021-06-12 20:37:53,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:37:53,791 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:37:53,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:53,794 INFO L225 Difference]: With dead ends: 2286 [2021-06-12 20:37:53,794 INFO L226 Difference]: Without dead ends: 2277 [2021-06-12 20:37:53,795 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1522.5ms TimeCoverageRelationStatistics Valid=540, Invalid=2322, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 20:37:53,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2021-06-12 20:37:53,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 1418. [2021-06-12 20:37:53,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1418 states, 1417 states have (on average 3.455892731122089) internal successors, (4897), 1417 states have internal predecessors, (4897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:53,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 4897 transitions. [2021-06-12 20:37:53,814 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 4897 transitions. Word has length 24 [2021-06-12 20:37:53,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:53,814 INFO L482 AbstractCegarLoop]: Abstraction has 1418 states and 4897 transitions. [2021-06-12 20:37:53,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:53,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 4897 transitions. [2021-06-12 20:37:53,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:37:53,816 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:53,816 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:54,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:54,016 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:54,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:54,016 INFO L82 PathProgramCache]: Analyzing trace with hash -543246416, now seen corresponding path program 7 times [2021-06-12 20:37:54,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:54,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788380778] [2021-06-12 20:37:54,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:54,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:54,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:54,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:54,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788380778] [2021-06-12 20:37:54,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788380778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:54,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944951349] [2021-06-12 20:37:54,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:54,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:54,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:37:54,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:54,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:37:54,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:54,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:54,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:54,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:37:54,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:54,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944951349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:54,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:54,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:37:54,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720294773] [2021-06-12 20:37:54,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:37:54,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:54,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:37:54,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:37:54,332 INFO L87 Difference]: Start difference. First operand 1418 states and 4897 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:55,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:55,045 INFO L93 Difference]: Finished difference Result 2241 states and 7629 transitions. [2021-06-12 20:37:55,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:37:55,056 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:37:55,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:55,059 INFO L225 Difference]: With dead ends: 2241 [2021-06-12 20:37:55,059 INFO L226 Difference]: Without dead ends: 2230 [2021-06-12 20:37:55,059 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 568.6ms TimeCoverageRelationStatistics Valid=178, Invalid=1012, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:37:55,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2021-06-12 20:37:55,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 1410. [2021-06-12 20:37:55,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 3.4570617459190918) internal successors, (4871), 1409 states have internal predecessors, (4871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:55,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 4871 transitions. [2021-06-12 20:37:55,077 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 4871 transitions. Word has length 24 [2021-06-12 20:37:55,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:55,078 INFO L482 AbstractCegarLoop]: Abstraction has 1410 states and 4871 transitions. [2021-06-12 20:37:55,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:55,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 4871 transitions. [2021-06-12 20:37:55,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:37:55,079 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:55,080 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:55,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-12 20:37:55,280 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:55,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:55,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1059751936, now seen corresponding path program 53 times [2021-06-12 20:37:55,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:55,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384612159] [2021-06-12 20:37:55,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:55,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:55,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:55,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:55,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384612159] [2021-06-12 20:37:55,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384612159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:55,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693736314] [2021-06-12 20:37:55,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:55,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:37:55,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:55,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:37:55,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:55,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:37:55,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:55,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:55,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:55,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:37:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:55,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693736314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:55,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:55,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:37:55,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139282005] [2021-06-12 20:37:55,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:37:55,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:55,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:37:55,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:37:55,681 INFO L87 Difference]: Start difference. First operand 1410 states and 4871 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:56,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:56,743 INFO L93 Difference]: Finished difference Result 2280 states and 7676 transitions. [2021-06-12 20:37:56,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:37:56,743 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:37:56,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:56,746 INFO L225 Difference]: With dead ends: 2280 [2021-06-12 20:37:56,746 INFO L226 Difference]: Without dead ends: 2270 [2021-06-12 20:37:56,746 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 697.0ms TimeCoverageRelationStatistics Valid=245, Invalid=1647, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:37:56,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2021-06-12 20:37:56,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 1412. [2021-06-12 20:37:56,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 3.4564138908575477) internal successors, (4877), 1411 states have internal predecessors, (4877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:56,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 4877 transitions. [2021-06-12 20:37:56,764 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 4877 transitions. Word has length 24 [2021-06-12 20:37:56,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:56,764 INFO L482 AbstractCegarLoop]: Abstraction has 1412 states and 4877 transitions. [2021-06-12 20:37:56,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:56,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 4877 transitions. [2021-06-12 20:37:56,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:37:56,766 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:56,766 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:56,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-12 20:37:56,967 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:56,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:56,967 INFO L82 PathProgramCache]: Analyzing trace with hash -448330122, now seen corresponding path program 54 times [2021-06-12 20:37:56,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:56,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696896681] [2021-06-12 20:37:56,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:56,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:57,136 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:57,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:57,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696896681] [2021-06-12 20:37:57,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696896681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:57,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585123538] [2021-06-12 20:37:57,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:57,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:37:57,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:57,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 20:37:57,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:57,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:57,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:57,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:37:57,414 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:57,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-06-12 20:37:57,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:37:57,440 INFO L628 ElimStorePlain]: treesize reduction 29, result has 52.5 percent of original size [2021-06-12 20:37:57,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:57,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:21 [2021-06-12 20:37:57,504 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:57,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585123538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:57,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:57,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:37:57,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772411728] [2021-06-12 20:37:57,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:37:57,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:57,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:37:57,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:37:57,505 INFO L87 Difference]: Start difference. First operand 1412 states and 4877 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:58,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:58,476 INFO L93 Difference]: Finished difference Result 2222 states and 7429 transitions. [2021-06-12 20:37:58,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:37:58,476 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:37:58,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:58,479 INFO L225 Difference]: With dead ends: 2222 [2021-06-12 20:37:58,479 INFO L226 Difference]: Without dead ends: 2190 [2021-06-12 20:37:58,479 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 683.9ms TimeCoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:37:58,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2190 states. [2021-06-12 20:37:58,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2190 to 1424. [2021-06-12 20:37:58,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1423 states have (on average 3.456078706957133) internal successors, (4918), 1423 states have internal predecessors, (4918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:58,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 4918 transitions. [2021-06-12 20:37:58,499 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 4918 transitions. Word has length 24 [2021-06-12 20:37:58,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:58,499 INFO L482 AbstractCegarLoop]: Abstraction has 1424 states and 4918 transitions. [2021-06-12 20:37:58,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:58,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 4918 transitions. [2021-06-12 20:37:58,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:37:58,501 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:58,501 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:58,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:58,717 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:37:58,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:58,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1487913390, now seen corresponding path program 55 times [2021-06-12 20:37:58,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:58,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257435343] [2021-06-12 20:37:58,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:58,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:58,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:58,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257435343] [2021-06-12 20:37:58,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257435343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:58,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577320401] [2021-06-12 20:37:58,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:58,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:58,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:37:58,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:59,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:37:59,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:37:59,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:37:59,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:37:59,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:37:59,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:59,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577320401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:59,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:59,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:37:59,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179703160] [2021-06-12 20:37:59,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:37:59,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:59,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:37:59,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:37:59,064 INFO L87 Difference]: Start difference. First operand 1424 states and 4918 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:00,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:00,120 INFO L93 Difference]: Finished difference Result 2213 states and 7447 transitions. [2021-06-12 20:38:00,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:38:00,120 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:38:00,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:00,123 INFO L225 Difference]: With dead ends: 2213 [2021-06-12 20:38:00,123 INFO L226 Difference]: Without dead ends: 2191 [2021-06-12 20:38:00,124 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 733.7ms TimeCoverageRelationStatistics Valid=235, Invalid=1487, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:38:00,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2191 states. [2021-06-12 20:38:00,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2191 to 1426. [2021-06-12 20:38:00,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.4596491228070176) internal successors, (4930), 1425 states have internal predecessors, (4930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:00,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 4930 transitions. [2021-06-12 20:38:00,144 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 4930 transitions. Word has length 24 [2021-06-12 20:38:00,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:00,144 INFO L482 AbstractCegarLoop]: Abstraction has 1426 states and 4930 transitions. [2021-06-12 20:38:00,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:00,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 4930 transitions. [2021-06-12 20:38:00,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:38:00,148 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:00,148 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:00,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-12 20:38:00,357 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:38:00,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:00,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1311371958, now seen corresponding path program 56 times [2021-06-12 20:38:00,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:00,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117837232] [2021-06-12 20:38:00,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:00,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:00,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:00,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:00,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117837232] [2021-06-12 20:38:00,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117837232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:00,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578603386] [2021-06-12 20:38:00,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:00,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:38:00,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:00,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:38:00,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:00,739 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:00,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:38:00,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:00,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:00,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:00,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:38:00,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:00,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578603386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:00,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:00,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:38:00,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245405528] [2021-06-12 20:38:00,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:38:00,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:00,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:38:00,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:38:00,848 INFO L87 Difference]: Start difference. First operand 1426 states and 4930 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:01,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:01,796 INFO L93 Difference]: Finished difference Result 2144 states and 7220 transitions. [2021-06-12 20:38:01,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:38:01,797 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:38:01,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:01,800 INFO L225 Difference]: With dead ends: 2144 [2021-06-12 20:38:01,800 INFO L226 Difference]: Without dead ends: 2134 [2021-06-12 20:38:01,800 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 806.2ms TimeCoverageRelationStatistics Valid=251, Invalid=1555, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:38:01,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2134 states. [2021-06-12 20:38:01,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2134 to 1432. [2021-06-12 20:38:01,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1431 states have (on average 3.4556254367575123) internal successors, (4945), 1431 states have internal predecessors, (4945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:01,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 4945 transitions. [2021-06-12 20:38:01,823 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 4945 transitions. Word has length 24 [2021-06-12 20:38:01,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:01,823 INFO L482 AbstractCegarLoop]: Abstraction has 1432 states and 4945 transitions. [2021-06-12 20:38:01,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:01,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 4945 transitions. [2021-06-12 20:38:01,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:38:01,825 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:01,825 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:02,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-12 20:38:02,037 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:38:02,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:02,037 INFO L82 PathProgramCache]: Analyzing trace with hash 477633518, now seen corresponding path program 57 times [2021-06-12 20:38:02,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:02,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56428266] [2021-06-12 20:38:02,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:02,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:02,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:02,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:02,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56428266] [2021-06-12 20:38:02,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56428266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:02,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628568956] [2021-06-12 20:38:02,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:02,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:38:02,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:02,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:02,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:02,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:38:02,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:02,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 49 [2021-06-12 20:38:02,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:02,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:02,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:02,508 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:46 [2021-06-12 20:38:02,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:02,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628568956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:02,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:02,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:38:02,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762791345] [2021-06-12 20:38:02,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:38:02,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:02,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:38:02,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:38:02,651 INFO L87 Difference]: Start difference. First operand 1432 states and 4945 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:04,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:04,302 INFO L93 Difference]: Finished difference Result 2174 states and 7260 transitions. [2021-06-12 20:38:04,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 20:38:04,302 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:38:04,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:04,305 INFO L225 Difference]: With dead ends: 2174 [2021-06-12 20:38:04,305 INFO L226 Difference]: Without dead ends: 2163 [2021-06-12 20:38:04,305 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1385.9ms TimeCoverageRelationStatistics Valid=384, Invalid=2268, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 20:38:04,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-06-12 20:38:04,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1456. [2021-06-12 20:38:04,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.454982817869416) internal successors, (5027), 1455 states have internal predecessors, (5027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:04,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5027 transitions. [2021-06-12 20:38:04,326 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5027 transitions. Word has length 24 [2021-06-12 20:38:04,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:04,327 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 5027 transitions. [2021-06-12 20:38:04,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:04,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5027 transitions. [2021-06-12 20:38:04,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:38:04,336 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:04,336 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:04,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-12 20:38:04,552 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:38:04,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:04,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1259467318, now seen corresponding path program 58 times [2021-06-12 20:38:04,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:04,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835146634] [2021-06-12 20:38:04,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:04,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:04,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:04,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:04,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835146634] [2021-06-12 20:38:04,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835146634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:04,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77357991] [2021-06-12 20:38:04,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 20:38:04,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:38:04,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:04,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:04,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:04,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:38:04,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:04,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:04,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:04,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:38:04,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:04,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77357991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:04,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:04,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:38:04,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641672083] [2021-06-12 20:38:04,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:38:04,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:04,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:38:04,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:38:04,885 INFO L87 Difference]: Start difference. First operand 1456 states and 5027 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:05,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:05,596 INFO L93 Difference]: Finished difference Result 2091 states and 7062 transitions. [2021-06-12 20:38:05,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:38:05,597 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:38:05,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:05,599 INFO L225 Difference]: With dead ends: 2091 [2021-06-12 20:38:05,599 INFO L226 Difference]: Without dead ends: 2080 [2021-06-12 20:38:05,599 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 513.7ms TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:38:05,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2021-06-12 20:38:05,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 1453. [2021-06-12 20:38:05,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1452 states have (on average 3.4579889807162534) internal successors, (5021), 1452 states have internal predecessors, (5021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:05,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 5021 transitions. [2021-06-12 20:38:05,617 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 5021 transitions. Word has length 24 [2021-06-12 20:38:05,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:05,617 INFO L482 AbstractCegarLoop]: Abstraction has 1453 states and 5021 transitions. [2021-06-12 20:38:05,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:05,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 5021 transitions. [2021-06-12 20:38:05,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:38:05,619 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:05,619 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:05,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:05,820 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:38:05,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:05,820 INFO L82 PathProgramCache]: Analyzing trace with hash -291281526, now seen corresponding path program 8 times [2021-06-12 20:38:05,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:05,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649322763] [2021-06-12 20:38:05,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:05,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:05,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:05,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:05,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649322763] [2021-06-12 20:38:05,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649322763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:05,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450651845] [2021-06-12 20:38:05,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:06,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:38:06,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:06,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:38:06,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:06,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:38:06,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:38:06,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:38:06,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:06,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:06,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:06,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 20:38:06,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:06,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450651845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:06,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:06,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:38:06,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111013272] [2021-06-12 20:38:06,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:38:06,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:06,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:38:06,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:38:06,249 INFO L87 Difference]: Start difference. First operand 1453 states and 5021 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:07,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:07,262 INFO L93 Difference]: Finished difference Result 2199 states and 7401 transitions. [2021-06-12 20:38:07,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:38:07,263 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:38:07,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:07,266 INFO L225 Difference]: With dead ends: 2199 [2021-06-12 20:38:07,266 INFO L226 Difference]: Without dead ends: 2190 [2021-06-12 20:38:07,267 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 658.5ms TimeCoverageRelationStatistics Valid=206, Invalid=1434, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:38:07,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2190 states. [2021-06-12 20:38:07,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2190 to 1453. [2021-06-12 20:38:07,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1452 states have (on average 3.4579889807162534) internal successors, (5021), 1452 states have internal predecessors, (5021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:07,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 5021 transitions. [2021-06-12 20:38:07,285 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 5021 transitions. Word has length 24 [2021-06-12 20:38:07,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:07,285 INFO L482 AbstractCegarLoop]: Abstraction has 1453 states and 5021 transitions. [2021-06-12 20:38:07,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:07,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 5021 transitions. [2021-06-12 20:38:07,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:38:07,287 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:07,287 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:07,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:07,487 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:38:07,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:07,488 INFO L82 PathProgramCache]: Analyzing trace with hash -500818906, now seen corresponding path program 9 times [2021-06-12 20:38:07,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:07,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470266048] [2021-06-12 20:38:07,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:07,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:07,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:07,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:07,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470266048] [2021-06-12 20:38:07,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470266048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:07,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171786] [2021-06-12 20:38:07,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:07,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:38:07,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:07,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:07,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:07,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:38:07,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:07,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:07,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:07,831 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:38:07,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:07,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:07,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:07,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:38:07,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293108160] [2021-06-12 20:38:07,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:38:07,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:07,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:38:07,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:38:07,858 INFO L87 Difference]: Start difference. First operand 1453 states and 5021 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:09,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:09,105 INFO L93 Difference]: Finished difference Result 2243 states and 7546 transitions. [2021-06-12 20:38:09,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:38:09,106 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:38:09,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:09,109 INFO L225 Difference]: With dead ends: 2243 [2021-06-12 20:38:09,109 INFO L226 Difference]: Without dead ends: 2224 [2021-06-12 20:38:09,109 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 775.7ms TimeCoverageRelationStatistics Valid=241, Invalid=1565, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:38:09,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2224 states. [2021-06-12 20:38:09,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2224 to 1462. [2021-06-12 20:38:09,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1461 states have (on average 3.45927446954141) internal successors, (5054), 1461 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:09,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 5054 transitions. [2021-06-12 20:38:09,128 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 5054 transitions. Word has length 24 [2021-06-12 20:38:09,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:09,128 INFO L482 AbstractCegarLoop]: Abstraction has 1462 states and 5054 transitions. [2021-06-12 20:38:09,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:09,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 5054 transitions. [2021-06-12 20:38:09,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:38:09,130 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:09,130 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:09,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:09,330 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:38:09,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:09,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1227852840, now seen corresponding path program 10 times [2021-06-12 20:38:09,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:09,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466467541] [2021-06-12 20:38:09,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:09,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:09,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:09,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:09,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466467541] [2021-06-12 20:38:09,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466467541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:09,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093846088] [2021-06-12 20:38:09,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:09,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:38:09,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:09,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:09,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:09,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:38:09,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:09,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:09,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:09,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-12 20:38:09,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:09,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093846088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:09,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:09,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:38:09,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146905336] [2021-06-12 20:38:09,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:38:09,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:09,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:38:09,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:38:09,708 INFO L87 Difference]: Start difference. First operand 1462 states and 5054 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:10,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:10,672 INFO L93 Difference]: Finished difference Result 2195 states and 7404 transitions. [2021-06-12 20:38:10,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:38:10,672 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:38:10,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:10,675 INFO L225 Difference]: With dead ends: 2195 [2021-06-12 20:38:10,675 INFO L226 Difference]: Without dead ends: 2176 [2021-06-12 20:38:10,675 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 739.9ms TimeCoverageRelationStatistics Valid=235, Invalid=1487, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:38:10,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-06-12 20:38:10,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 1460. [2021-06-12 20:38:10,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 3.4619602467443453) internal successors, (5051), 1459 states have internal predecessors, (5051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:10,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 5051 transitions. [2021-06-12 20:38:10,694 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 5051 transitions. Word has length 24 [2021-06-12 20:38:10,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:10,694 INFO L482 AbstractCegarLoop]: Abstraction has 1460 states and 5051 transitions. [2021-06-12 20:38:10,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:10,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 5051 transitions. [2021-06-12 20:38:10,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:38:10,696 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:10,696 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:10,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-12 20:38:10,896 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:38:10,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:10,897 INFO L82 PathProgramCache]: Analyzing trace with hash 199702980, now seen corresponding path program 11 times [2021-06-12 20:38:10,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:10,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079539095] [2021-06-12 20:38:10,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:10,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:11,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:11,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:11,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079539095] [2021-06-12 20:38:11,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079539095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:11,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882423951] [2021-06-12 20:38:11,040 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:11,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:38:11,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:11,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:11,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:11,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:38:11,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:11,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:11,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:11,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:38:11,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:11,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882423951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:11,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:11,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:38:11,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539094908] [2021-06-12 20:38:11,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:38:11,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:11,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:38:11,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:38:11,225 INFO L87 Difference]: Start difference. First operand 1460 states and 5051 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:11,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:11,930 INFO L93 Difference]: Finished difference Result 2165 states and 7322 transitions. [2021-06-12 20:38:11,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:38:11,930 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:38:11,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:11,933 INFO L225 Difference]: With dead ends: 2165 [2021-06-12 20:38:11,933 INFO L226 Difference]: Without dead ends: 2156 [2021-06-12 20:38:11,933 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 537.5ms TimeCoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:38:11,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2021-06-12 20:38:11,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 1469. [2021-06-12 20:38:11,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1469 states, 1468 states have (on average 3.459809264305177) internal successors, (5079), 1468 states have internal predecessors, (5079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:11,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 5079 transitions. [2021-06-12 20:38:11,961 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 5079 transitions. Word has length 24 [2021-06-12 20:38:11,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:11,961 INFO L482 AbstractCegarLoop]: Abstraction has 1469 states and 5079 transitions. [2021-06-12 20:38:11,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:11,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 5079 transitions. [2021-06-12 20:38:11,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:38:11,963 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:11,963 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:12,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-12 20:38:12,163 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:38:12,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:12,164 INFO L82 PathProgramCache]: Analyzing trace with hash 523289158, now seen corresponding path program 12 times [2021-06-12 20:38:12,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:12,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487055352] [2021-06-12 20:38:12,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:12,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:12,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:12,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:12,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487055352] [2021-06-12 20:38:12,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487055352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:12,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142683810] [2021-06-12 20:38:12,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:12,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:38:12,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:12,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:38:12,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:12,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:38:12,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:38:12,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:38:12,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:12,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-06-12 20:38:12,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:12,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:12,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:12,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:88 [2021-06-12 20:38:12,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:12,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142683810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:12,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:12,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:38:12,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613748650] [2021-06-12 20:38:12,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:38:12,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:12,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:38:12,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:38:12,612 INFO L87 Difference]: Start difference. First operand 1469 states and 5079 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:13,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:13,625 INFO L93 Difference]: Finished difference Result 2142 states and 7233 transitions. [2021-06-12 20:38:13,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:38:13,626 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:38:13,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:13,629 INFO L225 Difference]: With dead ends: 2142 [2021-06-12 20:38:13,629 INFO L226 Difference]: Without dead ends: 2133 [2021-06-12 20:38:13,629 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 811.6ms TimeCoverageRelationStatistics Valid=284, Invalid=1522, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:38:13,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2021-06-12 20:38:13,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 1481. [2021-06-12 20:38:13,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1480 states have (on average 3.4594594594594597) internal successors, (5120), 1480 states have internal predecessors, (5120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:13,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 5120 transitions. [2021-06-12 20:38:13,649 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 5120 transitions. Word has length 24 [2021-06-12 20:38:13,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:13,649 INFO L482 AbstractCegarLoop]: Abstraction has 1481 states and 5120 transitions. [2021-06-12 20:38:13,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:13,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 5120 transitions. [2021-06-12 20:38:13,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:38:13,651 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:13,651 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:13,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-12 20:38:13,852 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:38:13,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:13,852 INFO L82 PathProgramCache]: Analyzing trace with hash -2085934016, now seen corresponding path program 13 times [2021-06-12 20:38:13,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:13,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997879498] [2021-06-12 20:38:13,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:13,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:13,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:13,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:13,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997879498] [2021-06-12 20:38:13,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997879498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:13,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656042977] [2021-06-12 20:38:13,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:14,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:14,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:14,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:14,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:38:14,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:14,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:14,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:14,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:38:14,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:14,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656042977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:14,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:14,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:38:14,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776221329] [2021-06-12 20:38:14,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:38:14,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:14,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:38:14,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:38:14,194 INFO L87 Difference]: Start difference. First operand 1481 states and 5120 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:14,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:14,870 INFO L93 Difference]: Finished difference Result 2094 states and 7096 transitions. [2021-06-12 20:38:14,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:38:14,870 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:38:14,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:14,873 INFO L225 Difference]: With dead ends: 2094 [2021-06-12 20:38:14,873 INFO L226 Difference]: Without dead ends: 2083 [2021-06-12 20:38:14,873 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 495.1ms TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:38:14,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2021-06-12 20:38:14,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 1473. [2021-06-12 20:38:14,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1472 states have (on average 3.4619565217391304) internal successors, (5096), 1472 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:14,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 5096 transitions. [2021-06-12 20:38:14,891 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 5096 transitions. Word has length 24 [2021-06-12 20:38:14,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:14,892 INFO L482 AbstractCegarLoop]: Abstraction has 1473 states and 5096 transitions. [2021-06-12 20:38:14,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:14,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 5096 transitions. [2021-06-12 20:38:14,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:38:14,893 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:14,893 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:15,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:15,094 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:38:15,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:15,094 INFO L82 PathProgramCache]: Analyzing trace with hash 721304348, now seen corresponding path program 59 times [2021-06-12 20:38:15,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:15,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153008118] [2021-06-12 20:38:15,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:15,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:15,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:15,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:15,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153008118] [2021-06-12 20:38:15,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153008118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:15,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771252025] [2021-06-12 20:38:15,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:15,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:38:15,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:15,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:15,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:15,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:38:15,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:15,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:15,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:15,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:38:15,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:15,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771252025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:15,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:15,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:38:15,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145128557] [2021-06-12 20:38:15,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:38:15,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:15,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:38:15,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:38:15,475 INFO L87 Difference]: Start difference. First operand 1473 states and 5096 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:17,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:17,217 INFO L93 Difference]: Finished difference Result 2359 states and 7859 transitions. [2021-06-12 20:38:17,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 20:38:17,218 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:38:17,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:17,221 INFO L225 Difference]: With dead ends: 2359 [2021-06-12 20:38:17,221 INFO L226 Difference]: Without dead ends: 2317 [2021-06-12 20:38:17,221 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1330.7ms TimeCoverageRelationStatistics Valid=405, Invalid=2675, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 20:38:17,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2021-06-12 20:38:17,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 1490. [2021-06-12 20:38:17,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490 states, 1489 states have (on average 3.455339153794493) internal successors, (5145), 1489 states have internal predecessors, (5145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:17,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 5145 transitions. [2021-06-12 20:38:17,240 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 5145 transitions. Word has length 24 [2021-06-12 20:38:17,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:17,240 INFO L482 AbstractCegarLoop]: Abstraction has 1490 states and 5145 transitions. [2021-06-12 20:38:17,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:17,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 5145 transitions. [2021-06-12 20:38:17,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:38:17,242 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:17,242 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:17,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:17,442 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:38:17,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:17,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1985601830, now seen corresponding path program 60 times [2021-06-12 20:38:17,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:17,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109048666] [2021-06-12 20:38:17,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:17,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:17,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:17,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109048666] [2021-06-12 20:38:17,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109048666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:17,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265075874] [2021-06-12 20:38:17,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:17,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:38:17,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:17,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:17,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:17,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:38:17,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:38:17,823 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:17,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 40 [2021-06-12 20:38:17,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:38:17,855 INFO L628 ElimStorePlain]: treesize reduction 31, result has 44.6 percent of original size [2021-06-12 20:38:17,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:17,860 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2021-06-12 20:38:17,921 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:17,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265075874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:17,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:17,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:38:17,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187029208] [2021-06-12 20:38:17,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:38:17,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:17,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:38:17,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:38:17,922 INFO L87 Difference]: Start difference. First operand 1490 states and 5145 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:19,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:19,293 INFO L93 Difference]: Finished difference Result 2233 states and 7485 transitions. [2021-06-12 20:38:19,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:38:19,293 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:38:19,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:19,296 INFO L225 Difference]: With dead ends: 2233 [2021-06-12 20:38:19,296 INFO L226 Difference]: Without dead ends: 2187 [2021-06-12 20:38:19,297 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 971.5ms TimeCoverageRelationStatistics Valid=237, Invalid=1743, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:38:19,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2021-06-12 20:38:19,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 1495. [2021-06-12 20:38:19,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 3.4558232931726907) internal successors, (5163), 1494 states have internal predecessors, (5163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:19,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 5163 transitions. [2021-06-12 20:38:19,315 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 5163 transitions. Word has length 24 [2021-06-12 20:38:19,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:19,315 INFO L482 AbstractCegarLoop]: Abstraction has 1495 states and 5163 transitions. [2021-06-12 20:38:19,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:19,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 5163 transitions. [2021-06-12 20:38:19,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:38:19,317 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:19,317 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:19,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-06-12 20:38:19,517 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:38:19,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:19,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1809060398, now seen corresponding path program 61 times [2021-06-12 20:38:19,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:19,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599472048] [2021-06-12 20:38:19,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:19,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:19,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:19,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:19,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599472048] [2021-06-12 20:38:19,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599472048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:19,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330014287] [2021-06-12 20:38:19,662 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:19,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:19,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:19,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:19,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:38:19,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:19,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:19,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:19,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:38:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:19,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330014287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:19,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:19,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:38:19,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351446123] [2021-06-12 20:38:19,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:38:19,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:19,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:38:19,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:38:19,847 INFO L87 Difference]: Start difference. First operand 1495 states and 5163 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:20,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:20,926 INFO L93 Difference]: Finished difference Result 2155 states and 7270 transitions. [2021-06-12 20:38:20,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:38:20,926 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:38:20,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:20,929 INFO L225 Difference]: With dead ends: 2155 [2021-06-12 20:38:20,929 INFO L226 Difference]: Without dead ends: 2125 [2021-06-12 20:38:20,929 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 880.4ms TimeCoverageRelationStatistics Valid=336, Invalid=1920, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:38:20,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2125 states. [2021-06-12 20:38:20,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2125 to 1497. [2021-06-12 20:38:20,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1496 states have (on average 3.4558823529411766) internal successors, (5170), 1496 states have internal predecessors, (5170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:20,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 5170 transitions. [2021-06-12 20:38:20,947 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 5170 transitions. Word has length 24 [2021-06-12 20:38:20,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:20,947 INFO L482 AbstractCegarLoop]: Abstraction has 1497 states and 5170 transitions. [2021-06-12 20:38:20,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:20,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 5170 transitions. [2021-06-12 20:38:20,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:38:20,949 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:20,949 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:21,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-12 20:38:21,149 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:38:21,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:21,150 INFO L82 PathProgramCache]: Analyzing trace with hash 975321958, now seen corresponding path program 62 times [2021-06-12 20:38:21,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:21,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137107293] [2021-06-12 20:38:21,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:21,299 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:21,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:21,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137107293] [2021-06-12 20:38:21,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137107293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:21,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560545801] [2021-06-12 20:38:21,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:21,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:38:21,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:21,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:38:21,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:21,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:21,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:38:21,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:21,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:21,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:21,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:38:21,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:21,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560545801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:21,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:21,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:38:21,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257961763] [2021-06-12 20:38:21,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:38:21,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:21,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:38:21,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:38:21,548 INFO L87 Difference]: Start difference. First operand 1497 states and 5170 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:22,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:22,835 INFO L93 Difference]: Finished difference Result 2128 states and 7174 transitions. [2021-06-12 20:38:22,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:38:22,835 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:38:22,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:22,838 INFO L225 Difference]: With dead ends: 2128 [2021-06-12 20:38:22,838 INFO L226 Difference]: Without dead ends: 2097 [2021-06-12 20:38:22,838 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 997.6ms TimeCoverageRelationStatistics Valid=297, Invalid=2055, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 20:38:22,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-06-12 20:38:22,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1499. [2021-06-12 20:38:22,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 3.4539385847797064) internal successors, (5174), 1498 states have internal predecessors, (5174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:22,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 5174 transitions. [2021-06-12 20:38:22,857 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 5174 transitions. Word has length 24 [2021-06-12 20:38:22,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:22,857 INFO L482 AbstractCegarLoop]: Abstraction has 1499 states and 5174 transitions. [2021-06-12 20:38:22,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:22,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 5174 transitions. [2021-06-12 20:38:22,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:38:22,859 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:22,859 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:23,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:23,066 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:38:23,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:23,066 INFO L82 PathProgramCache]: Analyzing trace with hash -846298030, now seen corresponding path program 14 times [2021-06-12 20:38:23,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:23,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069946167] [2021-06-12 20:38:23,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:23,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:23,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:23,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069946167] [2021-06-12 20:38:23,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069946167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:23,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519923279] [2021-06-12 20:38:23,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:23,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:38:23,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:23,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:38:23,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:23,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:38:23,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:38:23,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:38:23,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:23,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:23,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:23,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 20:38:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:23,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519923279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:23,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:23,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:38:23,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376958865] [2021-06-12 20:38:23,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:38:23,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:23,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:38:23,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:38:23,515 INFO L87 Difference]: Start difference. First operand 1499 states and 5174 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:24,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:24,966 INFO L93 Difference]: Finished difference Result 2335 states and 7758 transitions. [2021-06-12 20:38:24,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 20:38:24,966 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:38:24,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:24,970 INFO L225 Difference]: With dead ends: 2335 [2021-06-12 20:38:24,970 INFO L226 Difference]: Without dead ends: 2285 [2021-06-12 20:38:24,970 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1168.0ms TimeCoverageRelationStatistics Valid=381, Invalid=2589, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 20:38:24,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-12 20:38:24,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 1503. [2021-06-12 20:38:24,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1503 states, 1502 states have (on average 3.454727030625832) internal successors, (5189), 1502 states have internal predecessors, (5189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:24,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 5189 transitions. [2021-06-12 20:38:24,995 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 5189 transitions. Word has length 24 [2021-06-12 20:38:24,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:24,995 INFO L482 AbstractCegarLoop]: Abstraction has 1503 states and 5189 transitions. [2021-06-12 20:38:24,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:24,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 5189 transitions. [2021-06-12 20:38:24,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:38:24,997 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:24,997 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:25,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-06-12 20:38:25,198 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:38:25,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:25,199 INFO L82 PathProgramCache]: Analyzing trace with hash 882373716, now seen corresponding path program 15 times [2021-06-12 20:38:25,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:25,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603369132] [2021-06-12 20:38:25,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:25,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:25,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:25,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:25,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603369132] [2021-06-12 20:38:25,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603369132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:25,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040982846] [2021-06-12 20:38:25,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:25,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:38:25,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:25,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:38:25,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:25,568 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:25,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-12 20:38:25,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:25,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:25,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:25,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-12 20:38:25,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:25,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040982846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:25,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:25,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:38:25,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735407323] [2021-06-12 20:38:25,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:38:25,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:25,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:38:25,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:38:25,678 INFO L87 Difference]: Start difference. First operand 1503 states and 5189 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:25,957 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2021-06-12 20:38:28,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:28,147 INFO L93 Difference]: Finished difference Result 2316 states and 7730 transitions. [2021-06-12 20:38:28,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 20:38:28,147 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:38:28,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:28,150 INFO L225 Difference]: With dead ends: 2316 [2021-06-12 20:38:28,150 INFO L226 Difference]: Without dead ends: 2277 [2021-06-12 20:38:28,151 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 2111.2ms TimeCoverageRelationStatistics Valid=572, Invalid=3588, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 20:38:28,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2021-06-12 20:38:28,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 1507. [2021-06-12 20:38:28,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1506 states have (on average 3.455511288180611) internal successors, (5204), 1506 states have internal predecessors, (5204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:28,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 5204 transitions. [2021-06-12 20:38:28,171 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 5204 transitions. Word has length 24 [2021-06-12 20:38:28,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:28,171 INFO L482 AbstractCegarLoop]: Abstraction has 1507 states and 5204 transitions. [2021-06-12 20:38:28,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:28,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 5204 transitions. [2021-06-12 20:38:28,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:38:28,172 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:28,173 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:28,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:28,373 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:38:28,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:28,373 INFO L82 PathProgramCache]: Analyzing trace with hash -145776144, now seen corresponding path program 16 times [2021-06-12 20:38:28,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:28,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606976601] [2021-06-12 20:38:28,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:28,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:28,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:28,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:28,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606976601] [2021-06-12 20:38:28,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606976601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:28,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949805742] [2021-06-12 20:38:28,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:28,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:38:28,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:28,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:28,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:28,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:38:28,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:28,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:28,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:28,700 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:38:28,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:28,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949805742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:28,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:28,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:38:28,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188956326] [2021-06-12 20:38:28,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:38:28,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:28,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:38:28,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:38:28,748 INFO L87 Difference]: Start difference. First operand 1507 states and 5204 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:29,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:29,960 INFO L93 Difference]: Finished difference Result 2152 states and 7265 transitions. [2021-06-12 20:38:29,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:38:29,961 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:38:29,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:29,963 INFO L225 Difference]: With dead ends: 2152 [2021-06-12 20:38:29,963 INFO L226 Difference]: Without dead ends: 2126 [2021-06-12 20:38:29,964 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 993.0ms TimeCoverageRelationStatistics Valid=350, Invalid=2002, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 20:38:29,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-06-12 20:38:29,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1510. [2021-06-12 20:38:29,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1509 states have (on average 3.453943008614977) internal successors, (5212), 1509 states have internal predecessors, (5212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:29,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 5212 transitions. [2021-06-12 20:38:29,982 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 5212 transitions. Word has length 24 [2021-06-12 20:38:29,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:29,982 INFO L482 AbstractCegarLoop]: Abstraction has 1510 states and 5212 transitions. [2021-06-12 20:38:29,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:29,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 5212 transitions. [2021-06-12 20:38:29,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:38:29,984 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:29,984 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:30,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:30,185 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:38:30,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:30,185 INFO L82 PathProgramCache]: Analyzing trace with hash 177810034, now seen corresponding path program 17 times [2021-06-12 20:38:30,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:30,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593301635] [2021-06-12 20:38:30,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:30,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:30,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:30,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:30,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593301635] [2021-06-12 20:38:30,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593301635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:30,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384834259] [2021-06-12 20:38:30,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:30,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:38:30,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:30,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:30,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:30,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:38:30,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:30,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:30,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:30,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:38:30,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:30,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384834259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:30,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:30,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:38:30,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444961501] [2021-06-12 20:38:30,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:38:30,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:30,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:38:30,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:38:30,559 INFO L87 Difference]: Start difference. First operand 1510 states and 5212 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:31,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:31,576 INFO L93 Difference]: Finished difference Result 2129 states and 7196 transitions. [2021-06-12 20:38:31,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:38:31,576 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:38:31,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:31,579 INFO L225 Difference]: With dead ends: 2129 [2021-06-12 20:38:31,579 INFO L226 Difference]: Without dead ends: 2104 [2021-06-12 20:38:31,580 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 797.5ms TimeCoverageRelationStatistics Valid=255, Invalid=1551, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:38:31,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-06-12 20:38:31,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1507. [2021-06-12 20:38:31,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1506 states have (on average 3.454183266932271) internal successors, (5202), 1506 states have internal predecessors, (5202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:31,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 5202 transitions. [2021-06-12 20:38:31,598 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 5202 transitions. Word has length 24 [2021-06-12 20:38:31,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:31,599 INFO L482 AbstractCegarLoop]: Abstraction has 1507 states and 5202 transitions. [2021-06-12 20:38:31,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:31,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 5202 transitions. [2021-06-12 20:38:31,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:38:31,600 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:31,600 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:31,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:31,802 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:38:31,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:31,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1468982144, now seen corresponding path program 63 times [2021-06-12 20:38:31,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:31,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407467466] [2021-06-12 20:38:31,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:31,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:31,986 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:31,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:31,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407467466] [2021-06-12 20:38:31,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407467466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:31,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171775570] [2021-06-12 20:38:31,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:32,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:38:32,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:32,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:32,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:32,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:38:32,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:32,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:32,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:32,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:38:32,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:32,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171775570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:32,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:32,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:38:32,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041981039] [2021-06-12 20:38:32,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:38:32,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:32,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:38:32,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:38:32,174 INFO L87 Difference]: Start difference. First operand 1507 states and 5202 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:34,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:34,448 INFO L93 Difference]: Finished difference Result 2395 states and 7988 transitions. [2021-06-12 20:38:34,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 20:38:34,448 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:38:34,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:34,451 INFO L225 Difference]: With dead ends: 2395 [2021-06-12 20:38:34,451 INFO L226 Difference]: Without dead ends: 2353 [2021-06-12 20:38:34,451 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 1794.2ms TimeCoverageRelationStatistics Valid=583, Invalid=3973, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 20:38:34,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2021-06-12 20:38:34,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 1512. [2021-06-12 20:38:34,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 3.452680344142952) internal successors, (5217), 1511 states have internal predecessors, (5217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:34,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 5217 transitions. [2021-06-12 20:38:34,470 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 5217 transitions. Word has length 24 [2021-06-12 20:38:34,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:34,470 INFO L482 AbstractCegarLoop]: Abstraction has 1512 states and 5217 transitions. [2021-06-12 20:38:34,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:34,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 5217 transitions. [2021-06-12 20:38:34,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:38:34,472 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:34,472 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:34,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-12 20:38:34,672 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:38:34,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:34,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1686407030, now seen corresponding path program 64 times [2021-06-12 20:38:34,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:34,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936798321] [2021-06-12 20:38:34,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:34,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:34,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:34,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:34,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936798321] [2021-06-12 20:38:34,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936798321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:34,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822648359] [2021-06-12 20:38:34,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:34,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:38:34,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:34,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:34,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:34,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:38:34,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:34,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:34,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:34,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:38:35,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:35,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822648359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:35,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:35,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:38:35,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073799385] [2021-06-12 20:38:35,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:38:35,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:35,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:38:35,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:38:35,006 INFO L87 Difference]: Start difference. First operand 1512 states and 5217 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:36,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:36,558 INFO L93 Difference]: Finished difference Result 2231 states and 7499 transitions. [2021-06-12 20:38:36,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 20:38:36,559 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:38:36,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:36,561 INFO L225 Difference]: With dead ends: 2231 [2021-06-12 20:38:36,561 INFO L226 Difference]: Without dead ends: 2201 [2021-06-12 20:38:36,562 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 1306.6ms TimeCoverageRelationStatistics Valid=477, Invalid=2829, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 20:38:36,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2201 states. [2021-06-12 20:38:36,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2201 to 1514. [2021-06-12 20:38:36,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1513 states have (on average 3.4527428949107732) internal successors, (5224), 1513 states have internal predecessors, (5224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:36,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 5224 transitions. [2021-06-12 20:38:36,579 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 5224 transitions. Word has length 24 [2021-06-12 20:38:36,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:36,580 INFO L482 AbstractCegarLoop]: Abstraction has 1514 states and 5224 transitions. [2021-06-12 20:38:36,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:36,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 5224 transitions. [2021-06-12 20:38:36,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:38:36,581 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:36,581 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:36,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-12 20:38:36,782 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:38:36,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:36,782 INFO L82 PathProgramCache]: Analyzing trace with hash 852668590, now seen corresponding path program 65 times [2021-06-12 20:38:36,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:36,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767822329] [2021-06-12 20:38:36,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:36,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:36,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:36,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:36,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767822329] [2021-06-12 20:38:36,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767822329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:36,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141419210] [2021-06-12 20:38:36,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:36,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:38:36,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:36,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:36,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:37,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:38:37,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:38:37,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:38:37,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-12 20:38:37,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:37,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:37,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:37,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:7 [2021-06-12 20:38:37,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:37,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141419210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:37,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:37,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:38:37,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614124445] [2021-06-12 20:38:37,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:38:37,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:37,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:38:37,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:38:37,178 INFO L87 Difference]: Start difference. First operand 1514 states and 5224 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:39,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:39,139 INFO L93 Difference]: Finished difference Result 2184 states and 7332 transitions. [2021-06-12 20:38:39,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 20:38:39,139 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:38:39,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:39,142 INFO L225 Difference]: With dead ends: 2184 [2021-06-12 20:38:39,142 INFO L226 Difference]: Without dead ends: 2150 [2021-06-12 20:38:39,143 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 1654.4ms TimeCoverageRelationStatistics Valid=513, Invalid=3777, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 20:38:39,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-06-12 20:38:39,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 1509. [2021-06-12 20:38:39,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1509 states, 1508 states have (on average 3.453580901856764) internal successors, (5208), 1508 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:39,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1509 states to 1509 states and 5208 transitions. [2021-06-12 20:38:39,170 INFO L78 Accepts]: Start accepts. Automaton has 1509 states and 5208 transitions. Word has length 24 [2021-06-12 20:38:39,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:39,170 INFO L482 AbstractCegarLoop]: Abstraction has 1509 states and 5208 transitions. [2021-06-12 20:38:39,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:39,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1509 states and 5208 transitions. [2021-06-12 20:38:39,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:38:39,172 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:39,172 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:39,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:39,373 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:38:39,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:39,373 INFO L82 PathProgramCache]: Analyzing trace with hash 2111150986, now seen corresponding path program 18 times [2021-06-12 20:38:39,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:39,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97558671] [2021-06-12 20:38:39,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:39,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:39,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:39,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:39,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97558671] [2021-06-12 20:38:39,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97558671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:39,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522473489] [2021-06-12 20:38:39,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:39,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:38:39,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:39,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:38:39,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:39,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:38:39,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:38:39,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:38:39,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:39,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:39,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:39,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 20:38:39,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:39,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522473489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:39,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:39,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:38:39,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460664586] [2021-06-12 20:38:39,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:38:39,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:39,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:38:39,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:38:39,798 INFO L87 Difference]: Start difference. First operand 1509 states and 5208 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:42,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:42,027 INFO L93 Difference]: Finished difference Result 2330 states and 7756 transitions. [2021-06-12 20:38:42,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 20:38:42,027 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:38:42,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:42,031 INFO L225 Difference]: With dead ends: 2330 [2021-06-12 20:38:42,031 INFO L226 Difference]: Without dead ends: 2272 [2021-06-12 20:38:42,031 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 1721.5ms TimeCoverageRelationStatistics Valid=553, Invalid=3479, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 20:38:42,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2021-06-12 20:38:42,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 1512. [2021-06-12 20:38:42,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 3.4533421575115817) internal successors, (5218), 1511 states have internal predecessors, (5218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:42,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 5218 transitions. [2021-06-12 20:38:42,051 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 5218 transitions. Word has length 24 [2021-06-12 20:38:42,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:42,051 INFO L482 AbstractCegarLoop]: Abstraction has 1512 states and 5218 transitions. [2021-06-12 20:38:42,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:42,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 5218 transitions. [2021-06-12 20:38:42,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:38:42,053 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:42,053 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:42,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:42,254 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:38:42,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:42,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1083001126, now seen corresponding path program 19 times [2021-06-12 20:38:42,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:42,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833623381] [2021-06-12 20:38:42,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:42,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:42,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:42,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:42,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833623381] [2021-06-12 20:38:42,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833623381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:42,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87628367] [2021-06-12 20:38:42,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:42,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:42,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:42,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:42,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:38:42,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:42,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:42,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:42,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:38:42,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:42,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87628367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:42,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:42,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:38:42,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570110816] [2021-06-12 20:38:42,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:38:42,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:42,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:38:42,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:38:42,575 INFO L87 Difference]: Start difference. First operand 1512 states and 5218 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:44,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:44,137 INFO L93 Difference]: Finished difference Result 2195 states and 7393 transitions. [2021-06-12 20:38:44,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 20:38:44,137 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:38:44,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:44,139 INFO L225 Difference]: With dead ends: 2195 [2021-06-12 20:38:44,140 INFO L226 Difference]: Without dead ends: 2169 [2021-06-12 20:38:44,140 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 1257.1ms TimeCoverageRelationStatistics Valid=418, Invalid=2234, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 20:38:44,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2021-06-12 20:38:44,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 1515. [2021-06-12 20:38:44,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 1514 states have (on average 3.451783355350066) internal successors, (5226), 1514 states have internal predecessors, (5226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:44,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 5226 transitions. [2021-06-12 20:38:44,157 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 5226 transitions. Word has length 24 [2021-06-12 20:38:44,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:44,158 INFO L482 AbstractCegarLoop]: Abstraction has 1515 states and 5226 transitions. [2021-06-12 20:38:44,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:44,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 5226 transitions. [2021-06-12 20:38:44,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:38:44,159 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:44,159 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:44,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:44,360 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:38:44,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:44,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1406587304, now seen corresponding path program 20 times [2021-06-12 20:38:44,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:44,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508427913] [2021-06-12 20:38:44,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:44,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:44,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:44,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:44,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508427913] [2021-06-12 20:38:44,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508427913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:44,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365195349] [2021-06-12 20:38:44,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:44,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:38:44,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:44,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:38:44,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:44,672 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:44,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:38:44,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:44,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:44,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:44,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:38:44,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:44,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365195349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:44,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:44,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:38:44,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87403707] [2021-06-12 20:38:44,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:38:44,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:44,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:38:44,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:38:44,788 INFO L87 Difference]: Start difference. First operand 1515 states and 5226 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:47,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:47,043 INFO L93 Difference]: Finished difference Result 2274 states and 7562 transitions. [2021-06-12 20:38:47,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 20:38:47,044 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:38:47,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:47,047 INFO L225 Difference]: With dead ends: 2274 [2021-06-12 20:38:47,047 INFO L226 Difference]: Without dead ends: 2243 [2021-06-12 20:38:47,047 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 1853.7ms TimeCoverageRelationStatistics Valid=590, Invalid=3570, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 20:38:47,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2243 states. [2021-06-12 20:38:47,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2243 to 1527. [2021-06-12 20:38:47,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 3.450851900393185) internal successors, (5266), 1526 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:47,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 5266 transitions. [2021-06-12 20:38:47,066 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 5266 transitions. Word has length 24 [2021-06-12 20:38:47,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:47,067 INFO L482 AbstractCegarLoop]: Abstraction has 1527 states and 5266 transitions. [2021-06-12 20:38:47,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:47,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 5266 transitions. [2021-06-12 20:38:47,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:38:47,068 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:47,068 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:47,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:47,269 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:38:47,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:47,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1202635870, now seen corresponding path program 21 times [2021-06-12 20:38:47,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:47,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166973871] [2021-06-12 20:38:47,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:47,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:47,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:47,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166973871] [2021-06-12 20:38:47,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166973871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:47,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995479338] [2021-06-12 20:38:47,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:47,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:38:47,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:47,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:47,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:47,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:38:47,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:47,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:47,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:47,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:38:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:47,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995479338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:47,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:47,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:38:47,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041502121] [2021-06-12 20:38:47,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:38:47,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:47,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:38:47,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:38:47,594 INFO L87 Difference]: Start difference. First operand 1527 states and 5266 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:49,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:49,018 INFO L93 Difference]: Finished difference Result 2109 states and 7137 transitions. [2021-06-12 20:38:49,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 20:38:49,019 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:38:49,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:49,022 INFO L225 Difference]: With dead ends: 2109 [2021-06-12 20:38:49,022 INFO L226 Difference]: Without dead ends: 2092 [2021-06-12 20:38:49,022 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1160.0ms TimeCoverageRelationStatistics Valid=359, Invalid=2091, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:38:49,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-06-12 20:38:49,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1518. [2021-06-12 20:38:49,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 3.4535266974291363) internal successors, (5239), 1517 states have internal predecessors, (5239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:49,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 5239 transitions. [2021-06-12 20:38:49,040 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 5239 transitions. Word has length 24 [2021-06-12 20:38:49,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:49,041 INFO L482 AbstractCegarLoop]: Abstraction has 1518 states and 5239 transitions. [2021-06-12 20:38:49,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:49,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 5239 transitions. [2021-06-12 20:38:49,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:38:49,042 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:49,042 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:49,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:49,243 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:38:49,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:49,243 INFO L82 PathProgramCache]: Analyzing trace with hash -743658084, now seen corresponding path program 66 times [2021-06-12 20:38:49,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:49,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990668093] [2021-06-12 20:38:49,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:49,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:49,388 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:49,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:49,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990668093] [2021-06-12 20:38:49,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990668093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:49,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850644709] [2021-06-12 20:38:49,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:49,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:38:49,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:49,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:38:49,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:49,532 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:49,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:38:49,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:49,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:49,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:49,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:38:49,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:49,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850644709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:49,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:49,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:38:49,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600724451] [2021-06-12 20:38:49,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:38:49,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:49,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:38:49,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:38:49,621 INFO L87 Difference]: Start difference. First operand 1518 states and 5239 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:52,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:52,250 INFO L93 Difference]: Finished difference Result 2778 states and 9114 transitions. [2021-06-12 20:38:52,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-12 20:38:52,250 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:38:52,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:52,254 INFO L225 Difference]: With dead ends: 2778 [2021-06-12 20:38:52,254 INFO L226 Difference]: Without dead ends: 2741 [2021-06-12 20:38:52,254 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2494 ImplicationChecksByTransitivity, 2158.0ms TimeCoverageRelationStatistics Valid=924, Invalid=6048, Unknown=0, NotChecked=0, Total=6972 [2021-06-12 20:38:52,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2741 states. [2021-06-12 20:38:52,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2741 to 1535. [2021-06-12 20:38:52,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 3.4615384615384617) internal successors, (5310), 1534 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:52,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 5310 transitions. [2021-06-12 20:38:52,276 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 5310 transitions. Word has length 24 [2021-06-12 20:38:52,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:52,276 INFO L482 AbstractCegarLoop]: Abstraction has 1535 states and 5310 transitions. [2021-06-12 20:38:52,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:52,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 5310 transitions. [2021-06-12 20:38:52,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:38:52,278 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:52,278 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:52,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:52,481 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:38:52,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:52,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1760448038, now seen corresponding path program 67 times [2021-06-12 20:38:52,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:52,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029790671] [2021-06-12 20:38:52,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:52,651 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:52,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:52,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029790671] [2021-06-12 20:38:52,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029790671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:52,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991552201] [2021-06-12 20:38:52,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:52,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:52,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:52,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:52,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:38:52,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:52,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:52,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:52,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:38:52,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:52,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991552201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:52,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:52,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:38:52,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791155248] [2021-06-12 20:38:52,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:38:52,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:52,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:38:52,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:38:52,842 INFO L87 Difference]: Start difference. First operand 1535 states and 5310 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:55,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:55,015 INFO L93 Difference]: Finished difference Result 2830 states and 9291 transitions. [2021-06-12 20:38:55,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-12 20:38:55,015 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:38:55,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:55,019 INFO L225 Difference]: With dead ends: 2830 [2021-06-12 20:38:55,020 INFO L226 Difference]: Without dead ends: 2787 [2021-06-12 20:38:55,020 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 1878.6ms TimeCoverageRelationStatistics Valid=868, Invalid=5294, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 20:38:55,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2021-06-12 20:38:55,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 1554. [2021-06-12 20:38:55,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1554 states, 1553 states have (on average 3.4745653573728266) internal successors, (5396), 1553 states have internal predecessors, (5396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:55,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 5396 transitions. [2021-06-12 20:38:55,044 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 5396 transitions. Word has length 24 [2021-06-12 20:38:55,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:55,044 INFO L482 AbstractCegarLoop]: Abstraction has 1554 states and 5396 transitions. [2021-06-12 20:38:55,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:55,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 5396 transitions. [2021-06-12 20:38:55,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:38:55,046 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:55,046 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:55,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-12 20:38:55,246 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:38:55,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:55,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1493814354, now seen corresponding path program 22 times [2021-06-12 20:38:55,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:55,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523366265] [2021-06-12 20:38:55,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:55,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:55,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:55,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:55,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523366265] [2021-06-12 20:38:55,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523366265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:55,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953017242] [2021-06-12 20:38:55,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:55,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:38:55,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:55,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:55,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:55,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:38:55,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:55,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:55,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:55,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:38:55,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:55,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953017242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:55,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:55,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:38:55,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952740082] [2021-06-12 20:38:55,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:38:55,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:55,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:38:55,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:38:55,576 INFO L87 Difference]: Start difference. First operand 1554 states and 5396 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:57,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:57,771 INFO L93 Difference]: Finished difference Result 2881 states and 9430 transitions. [2021-06-12 20:38:57,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-12 20:38:57,771 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:38:57,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:57,775 INFO L225 Difference]: With dead ends: 2881 [2021-06-12 20:38:57,775 INFO L226 Difference]: Without dead ends: 2832 [2021-06-12 20:38:57,775 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2147 ImplicationChecksByTransitivity, 1852.8ms TimeCoverageRelationStatistics Valid=911, Invalid=5095, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 20:38:57,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-06-12 20:38:57,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 1582. [2021-06-12 20:38:57,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 3.4927261227071473) internal successors, (5522), 1581 states have internal predecessors, (5522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:57,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 5522 transitions. [2021-06-12 20:38:57,799 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 5522 transitions. Word has length 24 [2021-06-12 20:38:57,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:57,799 INFO L482 AbstractCegarLoop]: Abstraction has 1582 states and 5522 transitions. [2021-06-12 20:38:57,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:57,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 5522 transitions. [2021-06-12 20:38:57,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:38:57,801 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:57,801 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:58,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-12 20:38:58,017 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:38:58,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:58,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1817400532, now seen corresponding path program 23 times [2021-06-12 20:38:58,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:58,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225534102] [2021-06-12 20:38:58,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:58,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:58,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:58,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:58,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225534102] [2021-06-12 20:38:58,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225534102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:58,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294536882] [2021-06-12 20:38:58,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:58,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:38:58,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:58,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:38:58,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:58,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:38:58,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:38:58,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:38:58,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:38:58,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:38:58,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:38:58,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294536882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:58,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:58,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:38:58,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874853668] [2021-06-12 20:38:58,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:38:58,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:58,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:38:58,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:38:58,324 INFO L87 Difference]: Start difference. First operand 1582 states and 5522 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:00,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:00,487 INFO L93 Difference]: Finished difference Result 2726 states and 9045 transitions. [2021-06-12 20:39:00,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-12 20:39:00,487 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:39:00,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:00,491 INFO L225 Difference]: With dead ends: 2726 [2021-06-12 20:39:00,492 INFO L226 Difference]: Without dead ends: 2706 [2021-06-12 20:39:00,492 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1946 ImplicationChecksByTransitivity, 1726.1ms TimeCoverageRelationStatistics Valid=828, Invalid=4722, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 20:39:00,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2706 states. [2021-06-12 20:39:00,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2706 to 1576. [2021-06-12 20:39:00,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 3.493333333333333) internal successors, (5502), 1575 states have internal predecessors, (5502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:00,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 5502 transitions. [2021-06-12 20:39:00,515 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 5502 transitions. Word has length 24 [2021-06-12 20:39:00,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:00,515 INFO L482 AbstractCegarLoop]: Abstraction has 1576 states and 5502 transitions. [2021-06-12 20:39:00,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:00,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 5502 transitions. [2021-06-12 20:39:00,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:39:00,517 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:00,517 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:00,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:00,717 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:39:00,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:00,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1940644096, now seen corresponding path program 68 times [2021-06-12 20:39:00,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:00,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180179222] [2021-06-12 20:39:00,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:00,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:00,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:00,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180179222] [2021-06-12 20:39:00,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180179222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:00,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856246264] [2021-06-12 20:39:00,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:00,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:39:00,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:00,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:39:00,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:01,015 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:01,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-12 20:39:01,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:01,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:01,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:01,026 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-12 20:39:01,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:01,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856246264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:01,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:01,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:39:01,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585226313] [2021-06-12 20:39:01,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:39:01,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:01,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:39:01,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:39:01,112 INFO L87 Difference]: Start difference. First operand 1576 states and 5502 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:03,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:03,981 INFO L93 Difference]: Finished difference Result 2803 states and 9390 transitions. [2021-06-12 20:39:03,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-12 20:39:03,982 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:39:03,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:03,986 INFO L225 Difference]: With dead ends: 2803 [2021-06-12 20:39:03,986 INFO L226 Difference]: Without dead ends: 2781 [2021-06-12 20:39:03,986 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 2497.0ms TimeCoverageRelationStatistics Valid=988, Invalid=6322, Unknown=0, NotChecked=0, Total=7310 [2021-06-12 20:39:03,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2781 states. [2021-06-12 20:39:04,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2781 to 1592. [2021-06-12 20:39:04,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1592 states, 1591 states have (on average 3.508485229415462) internal successors, (5582), 1591 states have internal predecessors, (5582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:04,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 5582 transitions. [2021-06-12 20:39:04,015 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 5582 transitions. Word has length 24 [2021-06-12 20:39:04,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:04,016 INFO L482 AbstractCegarLoop]: Abstraction has 1592 states and 5582 transitions. [2021-06-12 20:39:04,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:04,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 5582 transitions. [2021-06-12 20:39:04,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:39:04,018 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:04,018 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:04,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:04,229 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:39:04,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:04,230 INFO L82 PathProgramCache]: Analyzing trace with hash -2145562230, now seen corresponding path program 24 times [2021-06-12 20:39:04,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:04,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527927477] [2021-06-12 20:39:04,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:04,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:04,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:04,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:04,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527927477] [2021-06-12 20:39:04,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527927477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:04,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567618469] [2021-06-12 20:39:04,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:04,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:39:04,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:04,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:39:04,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:04,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:04,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-12 20:39:04,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:04,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:04,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:04,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:27 [2021-06-12 20:39:04,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:04,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567618469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:04,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:04,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:39:04,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860134734] [2021-06-12 20:39:04,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:39:04,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:04,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:39:04,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:39:04,617 INFO L87 Difference]: Start difference. First operand 1592 states and 5582 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:07,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:07,531 INFO L93 Difference]: Finished difference Result 2820 states and 9359 transitions. [2021-06-12 20:39:07,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-12 20:39:07,531 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:39:07,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:07,535 INFO L225 Difference]: With dead ends: 2820 [2021-06-12 20:39:07,535 INFO L226 Difference]: Without dead ends: 2800 [2021-06-12 20:39:07,536 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2682 ImplicationChecksByTransitivity, 2555.4ms TimeCoverageRelationStatistics Valid=1088, Invalid=6222, Unknown=0, NotChecked=0, Total=7310 [2021-06-12 20:39:07,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2800 states. [2021-06-12 20:39:07,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2800 to 1593. [2021-06-12 20:39:07,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1592 states have (on average 3.5069095477386933) internal successors, (5583), 1592 states have internal predecessors, (5583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:07,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 5583 transitions. [2021-06-12 20:39:07,560 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 5583 transitions. Word has length 24 [2021-06-12 20:39:07,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:07,560 INFO L482 AbstractCegarLoop]: Abstraction has 1593 states and 5583 transitions. [2021-06-12 20:39:07,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:07,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 5583 transitions. [2021-06-12 20:39:07,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:39:07,562 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:07,562 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:07,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-12 20:39:07,763 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:39:07,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:07,764 INFO L82 PathProgramCache]: Analyzing trace with hash -459818108, now seen corresponding path program 25 times [2021-06-12 20:39:07,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:07,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510930046] [2021-06-12 20:39:07,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:07,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:07,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:07,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:07,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510930046] [2021-06-12 20:39:07,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510930046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:07,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754124042] [2021-06-12 20:39:07,902 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:07,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:07,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:07,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:08,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:39:08,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:08,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:08,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:08,056 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:39:08,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:08,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754124042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:08,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:08,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:39:08,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993762713] [2021-06-12 20:39:08,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:39:08,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:08,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:39:08,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:39:08,084 INFO L87 Difference]: Start difference. First operand 1593 states and 5583 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:10,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:10,337 INFO L93 Difference]: Finished difference Result 2662 states and 8908 transitions. [2021-06-12 20:39:10,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 20:39:10,338 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:39:10,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:10,341 INFO L225 Difference]: With dead ends: 2662 [2021-06-12 20:39:10,341 INFO L226 Difference]: Without dead ends: 2629 [2021-06-12 20:39:10,342 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 1753.4ms TimeCoverageRelationStatistics Valid=738, Invalid=4092, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 20:39:10,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2629 states. [2021-06-12 20:39:10,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2629 to 1589. [2021-06-12 20:39:10,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1589 states, 1588 states have (on average 3.5025188916876573) internal successors, (5562), 1588 states have internal predecessors, (5562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:10,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1589 states to 1589 states and 5562 transitions. [2021-06-12 20:39:10,365 INFO L78 Accepts]: Start accepts. Automaton has 1589 states and 5562 transitions. Word has length 24 [2021-06-12 20:39:10,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:10,365 INFO L482 AbstractCegarLoop]: Abstraction has 1589 states and 5562 transitions. [2021-06-12 20:39:10,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:10,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1589 states and 5562 transitions. [2021-06-12 20:39:10,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:39:10,367 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:10,367 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:10,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:10,569 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:39:10,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:10,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1985018250, now seen corresponding path program 26 times [2021-06-12 20:39:10,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:10,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419879686] [2021-06-12 20:39:10,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:10,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:10,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419879686] [2021-06-12 20:39:10,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419879686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:10,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025629698] [2021-06-12 20:39:10,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:10,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:39:10,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:10,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:39:10,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:10,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:10,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:10,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:39:10,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:10,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:10,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:10,979 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 20:39:11,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:11,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025629698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:11,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:11,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:39:11,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552896532] [2021-06-12 20:39:11,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:39:11,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:11,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:39:11,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:39:11,008 INFO L87 Difference]: Start difference. First operand 1589 states and 5562 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:13,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:13,449 INFO L93 Difference]: Finished difference Result 3367 states and 11408 transitions. [2021-06-12 20:39:13,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 20:39:13,449 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:39:13,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:13,455 INFO L225 Difference]: With dead ends: 3367 [2021-06-12 20:39:13,455 INFO L226 Difference]: Without dead ends: 3341 [2021-06-12 20:39:13,455 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1266 ImplicationChecksByTransitivity, 1933.6ms TimeCoverageRelationStatistics Valid=538, Invalid=4018, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 20:39:13,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3341 states. [2021-06-12 20:39:13,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3341 to 1591. [2021-06-12 20:39:13,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1590 states have (on average 3.5018867924528303) internal successors, (5568), 1590 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:13,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 5568 transitions. [2021-06-12 20:39:13,486 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 5568 transitions. Word has length 24 [2021-06-12 20:39:13,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:13,486 INFO L482 AbstractCegarLoop]: Abstraction has 1591 states and 5568 transitions. [2021-06-12 20:39:13,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:13,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 5568 transitions. [2021-06-12 20:39:13,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:39:13,488 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:13,488 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:13,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:13,703 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:39:13,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:13,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1800433182, now seen corresponding path program 27 times [2021-06-12 20:39:13,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:13,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750370823] [2021-06-12 20:39:13,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:13,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:13,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:13,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:13,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750370823] [2021-06-12 20:39:13,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750370823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:13,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846802733] [2021-06-12 20:39:13,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:13,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:39:13,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:13,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:39:13,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:14,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:14,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-12 20:39:14,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:14,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:14,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:14,056 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-12 20:39:14,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:14,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846802733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:14,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:14,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:39:14,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326288138] [2021-06-12 20:39:14,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:39:14,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:14,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:39:14,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:39:14,119 INFO L87 Difference]: Start difference. First operand 1591 states and 5568 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:16,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:16,838 INFO L93 Difference]: Finished difference Result 2710 states and 9124 transitions. [2021-06-12 20:39:16,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 20:39:16,838 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:39:16,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:16,842 INFO L225 Difference]: With dead ends: 2710 [2021-06-12 20:39:16,842 INFO L226 Difference]: Without dead ends: 2683 [2021-06-12 20:39:16,842 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 2216.9ms TimeCoverageRelationStatistics Valid=744, Invalid=4368, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 20:39:16,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2683 states. [2021-06-12 20:39:16,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2683 to 1600. [2021-06-12 20:39:16,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 3.50281425891182) internal successors, (5601), 1599 states have internal predecessors, (5601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:16,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 5601 transitions. [2021-06-12 20:39:16,866 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 5601 transitions. Word has length 24 [2021-06-12 20:39:16,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:16,866 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 5601 transitions. [2021-06-12 20:39:16,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:16,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 5601 transitions. [2021-06-12 20:39:16,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:39:16,868 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:16,868 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:17,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-12 20:39:17,069 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:39:17,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:17,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1590895802, now seen corresponding path program 28 times [2021-06-12 20:39:17,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:17,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753097074] [2021-06-12 20:39:17,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:17,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:17,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:17,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:17,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753097074] [2021-06-12 20:39:17,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753097074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:17,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947201267] [2021-06-12 20:39:17,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:17,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:39:17,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:17,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:17,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:17,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:39:17,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:17,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:17,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:17,435 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:39:17,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:17,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947201267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:17,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:17,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:39:17,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576221340] [2021-06-12 20:39:17,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:39:17,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:17,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:39:17,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:39:17,468 INFO L87 Difference]: Start difference. First operand 1600 states and 5601 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:19,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:19,228 INFO L93 Difference]: Finished difference Result 2564 states and 8676 transitions. [2021-06-12 20:39:19,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:39:19,228 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:39:19,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:19,232 INFO L225 Difference]: With dead ends: 2564 [2021-06-12 20:39:19,232 INFO L226 Difference]: Without dead ends: 2535 [2021-06-12 20:39:19,232 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1384.2ms TimeCoverageRelationStatistics Valid=402, Invalid=2460, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 20:39:19,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2535 states. [2021-06-12 20:39:19,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2535 to 1605. [2021-06-12 20:39:19,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1604 states have (on average 3.501870324189526) internal successors, (5617), 1604 states have internal predecessors, (5617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:19,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 5617 transitions. [2021-06-12 20:39:19,255 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 5617 transitions. Word has length 24 [2021-06-12 20:39:19,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:19,255 INFO L482 AbstractCegarLoop]: Abstraction has 1605 states and 5617 transitions. [2021-06-12 20:39:19,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:19,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 5617 transitions. [2021-06-12 20:39:19,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:39:19,258 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:19,258 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:19,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-12 20:39:19,477 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:39:19,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:19,477 INFO L82 PathProgramCache]: Analyzing trace with hash -975399748, now seen corresponding path program 29 times [2021-06-12 20:39:19,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:19,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312137593] [2021-06-12 20:39:19,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:19,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:19,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:19,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:19,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312137593] [2021-06-12 20:39:19,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312137593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:19,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685482987] [2021-06-12 20:39:19,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:19,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:39:19,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:19,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:19,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:19,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:39:19,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:19,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:19,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:19,859 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:39:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:19,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685482987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:19,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:19,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:39:19,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047242102] [2021-06-12 20:39:19,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:39:19,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:19,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:39:19,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:39:19,885 INFO L87 Difference]: Start difference. First operand 1605 states and 5617 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:21,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:21,469 INFO L93 Difference]: Finished difference Result 2491 states and 8452 transitions. [2021-06-12 20:39:21,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:39:21,469 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:39:21,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:21,473 INFO L225 Difference]: With dead ends: 2491 [2021-06-12 20:39:21,473 INFO L226 Difference]: Without dead ends: 2462 [2021-06-12 20:39:21,473 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1331.0ms TimeCoverageRelationStatistics Valid=402, Invalid=2354, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 20:39:21,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2021-06-12 20:39:21,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 1598. [2021-06-12 20:39:21,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1598 states, 1597 states have (on average 3.504696305572949) internal successors, (5597), 1597 states have internal predecessors, (5597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:21,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 5597 transitions. [2021-06-12 20:39:21,494 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 5597 transitions. Word has length 24 [2021-06-12 20:39:21,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:21,494 INFO L482 AbstractCegarLoop]: Abstraction has 1598 states and 5597 transitions. [2021-06-12 20:39:21,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:21,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 5597 transitions. [2021-06-12 20:39:21,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:39:21,496 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:21,496 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:21,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:21,697 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:39:21,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:21,697 INFO L82 PathProgramCache]: Analyzing trace with hash -2003549608, now seen corresponding path program 30 times [2021-06-12 20:39:21,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:21,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847736498] [2021-06-12 20:39:21,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:21,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:21,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:21,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:21,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847736498] [2021-06-12 20:39:21,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847736498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:21,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226411709] [2021-06-12 20:39:21,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:21,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:39:21,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:21,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:21,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:22,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:22,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:22,053 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:22,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-06-12 20:39:22,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:22,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:22,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:22,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:36 [2021-06-12 20:39:22,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:22,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226411709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:22,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:22,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:39:22,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429108533] [2021-06-12 20:39:22,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:39:22,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:22,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:39:22,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:39:22,164 INFO L87 Difference]: Start difference. First operand 1598 states and 5597 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:23,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:23,872 INFO L93 Difference]: Finished difference Result 2374 states and 8085 transitions. [2021-06-12 20:39:23,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 20:39:23,873 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:39:23,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:23,876 INFO L225 Difference]: With dead ends: 2374 [2021-06-12 20:39:23,876 INFO L226 Difference]: Without dead ends: 2357 [2021-06-12 20:39:23,876 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 1469.6ms TimeCoverageRelationStatistics Valid=625, Invalid=3035, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 20:39:23,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2021-06-12 20:39:23,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 1611. [2021-06-12 20:39:23,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1610 states have (on average 3.5012422360248445) internal successors, (5637), 1610 states have internal predecessors, (5637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:23,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 5637 transitions. [2021-06-12 20:39:23,896 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 5637 transitions. Word has length 24 [2021-06-12 20:39:23,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:23,896 INFO L482 AbstractCegarLoop]: Abstraction has 1611 states and 5637 transitions. [2021-06-12 20:39:23,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:23,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 5637 transitions. [2021-06-12 20:39:23,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:39:23,898 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:23,898 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:24,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-12 20:39:24,098 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:39:24,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:24,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1679963430, now seen corresponding path program 31 times [2021-06-12 20:39:24,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:24,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098939898] [2021-06-12 20:39:24,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:24,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:24,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:24,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098939898] [2021-06-12 20:39:24,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098939898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:24,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42432459] [2021-06-12 20:39:24,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:24,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:24,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:24,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:24,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:39:24,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:24,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:24,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:24,426 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:39:24,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:24,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42432459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:24,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:24,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:39:24,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348210602] [2021-06-12 20:39:24,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:39:24,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:24,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:39:24,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:39:24,469 INFO L87 Difference]: Start difference. First operand 1611 states and 5637 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:25,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:25,547 INFO L93 Difference]: Finished difference Result 2307 states and 7914 transitions. [2021-06-12 20:39:25,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:39:25,547 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:39:25,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:25,550 INFO L225 Difference]: With dead ends: 2307 [2021-06-12 20:39:25,550 INFO L226 Difference]: Without dead ends: 2296 [2021-06-12 20:39:25,550 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 863.4ms TimeCoverageRelationStatistics Valid=262, Invalid=1460, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:39:25,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-06-12 20:39:25,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1596. [2021-06-12 20:39:25,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1596 states, 1595 states have (on average 3.5040752351097177) internal successors, (5589), 1595 states have internal predecessors, (5589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:25,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 5589 transitions. [2021-06-12 20:39:25,570 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 5589 transitions. Word has length 24 [2021-06-12 20:39:25,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:25,570 INFO L482 AbstractCegarLoop]: Abstraction has 1596 states and 5589 transitions. [2021-06-12 20:39:25,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:25,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 5589 transitions. [2021-06-12 20:39:25,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:39:25,572 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:25,572 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:25,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:25,773 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:39:25,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:25,773 INFO L82 PathProgramCache]: Analyzing trace with hash 772236998, now seen corresponding path program 32 times [2021-06-12 20:39:25,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:25,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902919558] [2021-06-12 20:39:25,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:25,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:25,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:25,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:25,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902919558] [2021-06-12 20:39:25,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902919558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:25,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148126700] [2021-06-12 20:39:25,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:25,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:39:25,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:25,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:39:25,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:26,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:26,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:26,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:39:26,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:26,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:26,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:26,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 20:39:26,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:26,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148126700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:26,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:26,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:39:26,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510751379] [2021-06-12 20:39:26,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:39:26,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:26,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:39:26,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:39:26,211 INFO L87 Difference]: Start difference. First operand 1596 states and 5589 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:28,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:28,830 INFO L93 Difference]: Finished difference Result 3315 states and 11270 transitions. [2021-06-12 20:39:28,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 20:39:28,830 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:39:28,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:28,835 INFO L225 Difference]: With dead ends: 3315 [2021-06-12 20:39:28,835 INFO L226 Difference]: Without dead ends: 3296 [2021-06-12 20:39:28,836 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1290 ImplicationChecksByTransitivity, 2146.1ms TimeCoverageRelationStatistics Valid=585, Invalid=4107, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 20:39:28,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3296 states. [2021-06-12 20:39:28,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3296 to 1596. [2021-06-12 20:39:28,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1596 states, 1595 states have (on average 3.5040752351097177) internal successors, (5589), 1595 states have internal predecessors, (5589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:28,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 5589 transitions. [2021-06-12 20:39:28,861 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 5589 transitions. Word has length 24 [2021-06-12 20:39:28,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:28,861 INFO L482 AbstractCegarLoop]: Abstraction has 1596 states and 5589 transitions. [2021-06-12 20:39:28,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:28,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 5589 transitions. [2021-06-12 20:39:28,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:39:28,863 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:28,863 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:29,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:29,064 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:39:29,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:29,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1068711792, now seen corresponding path program 33 times [2021-06-12 20:39:29,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:29,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047488829] [2021-06-12 20:39:29,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:29,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:29,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:29,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:29,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047488829] [2021-06-12 20:39:29,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047488829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:29,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472954896] [2021-06-12 20:39:29,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:29,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:39:29,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:29,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:39:29,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:29,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:29,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-12 20:39:29,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:29,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:29,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:29,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-12 20:39:29,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:29,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472954896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:29,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:29,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:39:29,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041055087] [2021-06-12 20:39:29,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:39:29,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:29,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:39:29,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:39:29,510 INFO L87 Difference]: Start difference. First operand 1596 states and 5589 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:32,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:32,491 INFO L93 Difference]: Finished difference Result 2689 states and 9043 transitions. [2021-06-12 20:39:32,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 20:39:32,491 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:39:32,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:32,495 INFO L225 Difference]: With dead ends: 2689 [2021-06-12 20:39:32,495 INFO L226 Difference]: Without dead ends: 2662 [2021-06-12 20:39:32,496 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 2410.2ms TimeCoverageRelationStatistics Valid=686, Invalid=4284, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 20:39:32,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2662 states. [2021-06-12 20:39:32,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2662 to 1601. [2021-06-12 20:39:32,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1600 states have (on average 3.503125) internal successors, (5605), 1600 states have internal predecessors, (5605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:32,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 5605 transitions. [2021-06-12 20:39:32,518 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 5605 transitions. Word has length 24 [2021-06-12 20:39:32,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:32,518 INFO L482 AbstractCegarLoop]: Abstraction has 1601 states and 5605 transitions. [2021-06-12 20:39:32,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:32,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 5605 transitions. [2021-06-12 20:39:32,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:39:32,520 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:32,520 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:32,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-12 20:39:32,720 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:39:32,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:32,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1073663896, now seen corresponding path program 34 times [2021-06-12 20:39:32,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:32,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612412587] [2021-06-12 20:39:32,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:32,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:32,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:32,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:32,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612412587] [2021-06-12 20:39:32,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612412587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:32,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258618998] [2021-06-12 20:39:32,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:32,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:39:32,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:32,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:32,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:33,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:39:33,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:33,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:33,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:33,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:39:33,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:33,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258618998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:33,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:33,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:39:33,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847704333] [2021-06-12 20:39:33,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:39:33,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:33,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:39:33,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:39:33,107 INFO L87 Difference]: Start difference. First operand 1601 states and 5605 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:34,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:34,924 INFO L93 Difference]: Finished difference Result 2578 states and 8710 transitions. [2021-06-12 20:39:34,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:39:34,924 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:39:34,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:34,927 INFO L225 Difference]: With dead ends: 2578 [2021-06-12 20:39:34,928 INFO L226 Difference]: Without dead ends: 2558 [2021-06-12 20:39:34,928 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 1337.9ms TimeCoverageRelationStatistics Valid=368, Invalid=2284, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 20:39:34,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2558 states. [2021-06-12 20:39:34,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2558 to 1604. [2021-06-12 20:39:34,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1603 states have (on average 3.5015595757953837) internal successors, (5613), 1603 states have internal predecessors, (5613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:34,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 5613 transitions. [2021-06-12 20:39:34,950 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 5613 transitions. Word has length 24 [2021-06-12 20:39:34,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:34,950 INFO L482 AbstractCegarLoop]: Abstraction has 1604 states and 5613 transitions. [2021-06-12 20:39:34,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:34,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 5613 transitions. [2021-06-12 20:39:34,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:39:34,952 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:34,952 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:35,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-12 20:39:35,153 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:39:35,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:35,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1285059888, now seen corresponding path program 35 times [2021-06-12 20:39:35,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:35,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033662758] [2021-06-12 20:39:35,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:35,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:35,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:35,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:35,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033662758] [2021-06-12 20:39:35,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033662758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:35,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510812068] [2021-06-12 20:39:35,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:35,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:39:35,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:35,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:35,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:35,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:39:35,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:35,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:35,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:35,537 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:39:35,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:35,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510812068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:35,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:35,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:39:35,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196799390] [2021-06-12 20:39:35,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:39:35,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:35,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:39:35,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:39:35,572 INFO L87 Difference]: Start difference. First operand 1604 states and 5613 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:37,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:37,089 INFO L93 Difference]: Finished difference Result 2511 states and 8501 transitions. [2021-06-12 20:39:37,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:39:37,089 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:39:37,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:37,093 INFO L225 Difference]: With dead ends: 2511 [2021-06-12 20:39:37,093 INFO L226 Difference]: Without dead ends: 2491 [2021-06-12 20:39:37,093 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1262.6ms TimeCoverageRelationStatistics Valid=363, Invalid=2187, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:39:37,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2021-06-12 20:39:37,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 1600. [2021-06-12 20:39:37,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 3.5053158223889933) internal successors, (5605), 1599 states have internal predecessors, (5605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:37,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 5605 transitions. [2021-06-12 20:39:37,115 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 5605 transitions. Word has length 24 [2021-06-12 20:39:37,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:37,115 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 5605 transitions. [2021-06-12 20:39:37,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:37,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 5605 transitions. [2021-06-12 20:39:37,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:39:37,117 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:37,117 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:37,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:37,317 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:39:37,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:37,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1461601320, now seen corresponding path program 36 times [2021-06-12 20:39:37,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:37,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650812634] [2021-06-12 20:39:37,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:37,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:37,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:37,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650812634] [2021-06-12 20:39:37,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650812634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:37,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131094564] [2021-06-12 20:39:37,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:37,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:39:37,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:37,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:37,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:37,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:39:37,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:37,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:37,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:37,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:39:37,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:37,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131094564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:37,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:37,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:39:37,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749580072] [2021-06-12 20:39:37,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:39:37,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:37,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:39:37,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:39:37,674 INFO L87 Difference]: Start difference. First operand 1600 states and 5605 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:39,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:39,127 INFO L93 Difference]: Finished difference Result 2345 states and 8015 transitions. [2021-06-12 20:39:39,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 20:39:39,127 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:39:39,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:39,130 INFO L225 Difference]: With dead ends: 2345 [2021-06-12 20:39:39,130 INFO L226 Difference]: Without dead ends: 2336 [2021-06-12 20:39:39,130 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1266.3ms TimeCoverageRelationStatistics Valid=386, Invalid=2266, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 20:39:39,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-06-12 20:39:39,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 1608. [2021-06-12 20:39:39,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 3.5003111387678905) internal successors, (5625), 1607 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:39,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 5625 transitions. [2021-06-12 20:39:39,151 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 5625 transitions. Word has length 24 [2021-06-12 20:39:39,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:39,151 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 5625 transitions. [2021-06-12 20:39:39,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:39,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 5625 transitions. [2021-06-12 20:39:39,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:39:39,153 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:39,153 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:39,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-06-12 20:39:39,354 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:39:39,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:39,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1999627536, now seen corresponding path program 37 times [2021-06-12 20:39:39,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:39,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982946645] [2021-06-12 20:39:39,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:39,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:39,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:39,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:39,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982946645] [2021-06-12 20:39:39,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982946645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:39,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751301097] [2021-06-12 20:39:39,513 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:39,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:39,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:39,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:39,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:39:39,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:39,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:39,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:39,658 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:39:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:39,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751301097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:39,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:39,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:39:39,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548222317] [2021-06-12 20:39:39,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:39:39,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:39,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:39:39,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:39:39,712 INFO L87 Difference]: Start difference. First operand 1608 states and 5625 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:41,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:41,081 INFO L93 Difference]: Finished difference Result 2356 states and 8045 transitions. [2021-06-12 20:39:41,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:39:41,081 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:39:41,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:41,085 INFO L225 Difference]: With dead ends: 2356 [2021-06-12 20:39:41,085 INFO L226 Difference]: Without dead ends: 2346 [2021-06-12 20:39:41,085 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1095.8ms TimeCoverageRelationStatistics Valid=303, Invalid=1767, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:39:41,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-06-12 20:39:41,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1603. [2021-06-12 20:39:41,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 3.5037453183520597) internal successors, (5613), 1602 states have internal predecessors, (5613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:41,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 5613 transitions. [2021-06-12 20:39:41,106 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 5613 transitions. Word has length 24 [2021-06-12 20:39:41,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:41,106 INFO L482 AbstractCegarLoop]: Abstraction has 1603 states and 5613 transitions. [2021-06-12 20:39:41,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:41,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 5613 transitions. [2021-06-12 20:39:41,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:39:41,108 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:41,108 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:41,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-12 20:39:41,308 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:39:41,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:41,309 INFO L82 PathProgramCache]: Analyzing trace with hash 2121589456, now seen corresponding path program 38 times [2021-06-12 20:39:41,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:41,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140092043] [2021-06-12 20:39:41,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:41,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:41,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:41,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:41,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140092043] [2021-06-12 20:39:41,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140092043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:41,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634735220] [2021-06-12 20:39:41,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:41,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:39:41,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:41,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:39:41,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:41,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:41,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:41,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:39:41,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:41,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:41,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:41,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 20:39:41,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:41,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634735220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:41,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:41,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:39:41,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173126807] [2021-06-12 20:39:41,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:39:41,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:41,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:39:41,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:39:41,760 INFO L87 Difference]: Start difference. First operand 1603 states and 5613 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:42,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:42,847 INFO L93 Difference]: Finished difference Result 2139 states and 7300 transitions. [2021-06-12 20:39:42,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:39:42,847 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:39:42,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:42,850 INFO L225 Difference]: With dead ends: 2139 [2021-06-12 20:39:42,850 INFO L226 Difference]: Without dead ends: 2130 [2021-06-12 20:39:42,850 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 893.1ms TimeCoverageRelationStatistics Valid=253, Invalid=1553, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:39:42,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2021-06-12 20:39:42,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 1605. [2021-06-12 20:39:42,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1604 states have (on average 3.5037406483790523) internal successors, (5620), 1604 states have internal predecessors, (5620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:42,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 5620 transitions. [2021-06-12 20:39:42,869 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 5620 transitions. Word has length 24 [2021-06-12 20:39:42,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:42,869 INFO L482 AbstractCegarLoop]: Abstraction has 1605 states and 5620 transitions. [2021-06-12 20:39:42,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:42,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 5620 transitions. [2021-06-12 20:39:42,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:39:42,871 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:42,871 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:43,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-12 20:39:43,072 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:39:43,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:43,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1912052076, now seen corresponding path program 39 times [2021-06-12 20:39:43,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:43,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543783297] [2021-06-12 20:39:43,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:43,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:43,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:43,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543783297] [2021-06-12 20:39:43,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543783297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:43,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745503787] [2021-06-12 20:39:43,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:43,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:39:43,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:43,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:43,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:43,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:39:43,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:43,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:43,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:43,424 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:39:43,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:43,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745503787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:43,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:43,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:39:43,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169673332] [2021-06-12 20:39:43,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:39:43,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:43,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:39:43,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:39:43,451 INFO L87 Difference]: Start difference. First operand 1605 states and 5620 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:44,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:44,688 INFO L93 Difference]: Finished difference Result 2163 states and 7368 transitions. [2021-06-12 20:39:44,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:39:44,688 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:39:44,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:44,691 INFO L225 Difference]: With dead ends: 2163 [2021-06-12 20:39:44,691 INFO L226 Difference]: Without dead ends: 2144 [2021-06-12 20:39:44,692 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 986.8ms TimeCoverageRelationStatistics Valid=294, Invalid=1686, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:39:44,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2021-06-12 20:39:44,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 1610. [2021-06-12 20:39:44,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1609 states have (on average 3.5027967681789933) internal successors, (5636), 1609 states have internal predecessors, (5636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:44,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 5636 transitions. [2021-06-12 20:39:44,712 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 5636 transitions. Word has length 24 [2021-06-12 20:39:44,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:44,712 INFO L482 AbstractCegarLoop]: Abstraction has 1610 states and 5636 transitions. [2021-06-12 20:39:44,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:44,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 5636 transitions. [2021-06-12 20:39:44,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:39:44,714 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:44,714 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:44,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:44,914 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:39:44,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:44,914 INFO L82 PathProgramCache]: Analyzing trace with hash -654243474, now seen corresponding path program 40 times [2021-06-12 20:39:44,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:44,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046185327] [2021-06-12 20:39:44,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:45,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:45,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:45,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046185327] [2021-06-12 20:39:45,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046185327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:45,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678639802] [2021-06-12 20:39:45,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:45,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:39:45,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:45,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:45,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:45,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:39:45,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:45,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:45,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:45,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:39:45,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:45,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678639802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:45,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:45,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:39:45,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233660214] [2021-06-12 20:39:45,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:39:45,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:45,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:39:45,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:39:45,303 INFO L87 Difference]: Start difference. First operand 1610 states and 5636 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:46,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:46,521 INFO L93 Difference]: Finished difference Result 2117 states and 7230 transitions. [2021-06-12 20:39:46,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:39:46,521 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:39:46,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:46,524 INFO L225 Difference]: With dead ends: 2117 [2021-06-12 20:39:46,525 INFO L226 Difference]: Without dead ends: 2098 [2021-06-12 20:39:46,525 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 966.0ms TimeCoverageRelationStatistics Valid=287, Invalid=1605, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:39:46,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2021-06-12 20:39:46,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1607. [2021-06-12 20:39:46,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1607 states, 1606 states have (on average 3.5043586550435863) internal successors, (5628), 1606 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:46,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 5628 transitions. [2021-06-12 20:39:46,545 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 5628 transitions. Word has length 24 [2021-06-12 20:39:46,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:46,545 INFO L482 AbstractCegarLoop]: Abstraction has 1607 states and 5628 transitions. [2021-06-12 20:39:46,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:46,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 5628 transitions. [2021-06-12 20:39:46,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:39:46,547 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:46,547 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:46,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:46,747 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:39:46,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:46,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1682393334, now seen corresponding path program 41 times [2021-06-12 20:39:46,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:46,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340963251] [2021-06-12 20:39:46,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:46,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:46,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:46,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340963251] [2021-06-12 20:39:46,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340963251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:46,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333348874] [2021-06-12 20:39:46,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:46,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:39:46,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:46,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:46,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:47,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:39:47,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:47,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:47,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:47,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:39:47,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:47,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333348874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:47,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:47,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:39:47,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490921861] [2021-06-12 20:39:47,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:39:47,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:47,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:39:47,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:39:47,094 INFO L87 Difference]: Start difference. First operand 1607 states and 5628 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:48,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:48,019 INFO L93 Difference]: Finished difference Result 2083 states and 7122 transitions. [2021-06-12 20:39:48,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:39:48,019 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:39:48,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:48,021 INFO L225 Difference]: With dead ends: 2083 [2021-06-12 20:39:48,021 INFO L226 Difference]: Without dead ends: 2074 [2021-06-12 20:39:48,022 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 758.6ms TimeCoverageRelationStatistics Valid=252, Invalid=1230, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:39:48,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2021-06-12 20:39:48,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 1616. [2021-06-12 20:39:48,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 1615 states have (on average 3.502167182662539) internal successors, (5656), 1615 states have internal predecessors, (5656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:48,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 5656 transitions. [2021-06-12 20:39:48,041 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 5656 transitions. Word has length 24 [2021-06-12 20:39:48,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:48,041 INFO L482 AbstractCegarLoop]: Abstraction has 1616 states and 5656 transitions. [2021-06-12 20:39:48,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:48,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 5656 transitions. [2021-06-12 20:39:48,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:39:48,043 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:48,043 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:48,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2021-06-12 20:39:48,244 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:39:48,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:48,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1358807156, now seen corresponding path program 42 times [2021-06-12 20:39:48,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:48,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203400610] [2021-06-12 20:39:48,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:48,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:48,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:48,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203400610] [2021-06-12 20:39:48,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203400610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:48,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049302222] [2021-06-12 20:39:48,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:48,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:39:48,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:48,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:39:48,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:48,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:48,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:48,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:48,583 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:48,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-06-12 20:39:48,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:48,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:48,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:48,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:88 [2021-06-12 20:39:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:48,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049302222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:48,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:48,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:39:48,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60305937] [2021-06-12 20:39:48,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:39:48,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:48,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:39:48,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:39:48,726 INFO L87 Difference]: Start difference. First operand 1616 states and 5656 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:50,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:50,106 INFO L93 Difference]: Finished difference Result 2092 states and 7134 transitions. [2021-06-12 20:39:50,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:39:50,106 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:39:50,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:50,109 INFO L225 Difference]: With dead ends: 2092 [2021-06-12 20:39:50,109 INFO L226 Difference]: Without dead ends: 2083 [2021-06-12 20:39:50,109 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1165.2ms TimeCoverageRelationStatistics Valid=419, Invalid=1933, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 20:39:50,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2021-06-12 20:39:50,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 1615. [2021-06-12 20:39:50,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1615 states, 1614 states have (on average 3.502478314745973) internal successors, (5653), 1614 states have internal predecessors, (5653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:50,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 5653 transitions. [2021-06-12 20:39:50,128 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 5653 transitions. Word has length 24 [2021-06-12 20:39:50,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:50,128 INFO L482 AbstractCegarLoop]: Abstraction has 1615 states and 5653 transitions. [2021-06-12 20:39:50,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:50,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 5653 transitions. [2021-06-12 20:39:50,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:39:50,130 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:50,130 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:50,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-12 20:39:50,331 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:39:50,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:50,331 INFO L82 PathProgramCache]: Analyzing trace with hash 326936966, now seen corresponding path program 43 times [2021-06-12 20:39:50,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:50,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295322714] [2021-06-12 20:39:50,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:50,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:50,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:50,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295322714] [2021-06-12 20:39:50,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295322714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:50,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098101147] [2021-06-12 20:39:50,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:50,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:50,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:50,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:39:50,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:50,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:50,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:50,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:39:50,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:50,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098101147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:50,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:50,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:39:50,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018050847] [2021-06-12 20:39:50,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:39:50,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:50,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:39:50,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:39:50,682 INFO L87 Difference]: Start difference. First operand 1615 states and 5653 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:51,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:51,563 INFO L93 Difference]: Finished difference Result 2032 states and 6957 transitions. [2021-06-12 20:39:51,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:39:51,563 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:39:51,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:51,566 INFO L225 Difference]: With dead ends: 2032 [2021-06-12 20:39:51,566 INFO L226 Difference]: Without dead ends: 2021 [2021-06-12 20:39:51,566 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 745.9ms TimeCoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:39:51,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2021-06-12 20:39:51,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 1605. [2021-06-12 20:39:51,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1604 states have (on average 3.5031172069825436) internal successors, (5619), 1604 states have internal predecessors, (5619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:51,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 5619 transitions. [2021-06-12 20:39:51,585 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 5619 transitions. Word has length 24 [2021-06-12 20:39:51,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:51,585 INFO L482 AbstractCegarLoop]: Abstraction has 1605 states and 5619 transitions. [2021-06-12 20:39:51,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:51,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 5619 transitions. [2021-06-12 20:39:51,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:39:51,587 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:51,587 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:51,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:51,788 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:39:51,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:51,789 INFO L82 PathProgramCache]: Analyzing trace with hash 409417856, now seen corresponding path program 44 times [2021-06-12 20:39:51,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:51,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124067860] [2021-06-12 20:39:51,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:51,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:51,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:51,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:51,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124067860] [2021-06-12 20:39:51,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124067860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:51,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207390278] [2021-06-12 20:39:51,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:52,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:39:52,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:52,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:39:52,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:52,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:52,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:52,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:39:52,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:52,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:52,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:52,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 20:39:52,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:52,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207390278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:52,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:52,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:39:52,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013007527] [2021-06-12 20:39:52,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:39:52,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:52,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:39:52,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:39:52,266 INFO L87 Difference]: Start difference. First operand 1605 states and 5619 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:53,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:53,350 INFO L93 Difference]: Finished difference Result 2169 states and 7374 transitions. [2021-06-12 20:39:53,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:39:53,350 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:39:53,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:53,353 INFO L225 Difference]: With dead ends: 2169 [2021-06-12 20:39:53,353 INFO L226 Difference]: Without dead ends: 2160 [2021-06-12 20:39:53,353 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 910.8ms TimeCoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:39:53,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2160 states. [2021-06-12 20:39:53,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2160 to 1607. [2021-06-12 20:39:53,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1607 states, 1606 states have (on average 3.5043586550435863) internal successors, (5628), 1606 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:53,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 5628 transitions. [2021-06-12 20:39:53,372 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 5628 transitions. Word has length 24 [2021-06-12 20:39:53,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:53,373 INFO L482 AbstractCegarLoop]: Abstraction has 1607 states and 5628 transitions. [2021-06-12 20:39:53,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:53,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 5628 transitions. [2021-06-12 20:39:53,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:39:53,374 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:53,374 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:53,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-12 20:39:53,575 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:39:53,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:53,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1098664202, now seen corresponding path program 45 times [2021-06-12 20:39:53,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:53,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505032738] [2021-06-12 20:39:53,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:53,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:53,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:53,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:53,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505032738] [2021-06-12 20:39:53,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505032738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:53,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041153980] [2021-06-12 20:39:53,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:53,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:39:53,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:53,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:39:53,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:53,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:39:53,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:39:53,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:39:53,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:53,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:53,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:53,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 20:39:54,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:54,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041153980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:54,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:54,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:39:54,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473592731] [2021-06-12 20:39:54,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:39:54,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:54,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:39:54,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:39:54,020 INFO L87 Difference]: Start difference. First operand 1607 states and 5628 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:54,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:54,991 INFO L93 Difference]: Finished difference Result 2173 states and 7379 transitions. [2021-06-12 20:39:54,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:39:54,991 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:39:54,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:54,994 INFO L225 Difference]: With dead ends: 2173 [2021-06-12 20:39:54,994 INFO L226 Difference]: Without dead ends: 2163 [2021-06-12 20:39:54,994 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 850.3ms TimeCoverageRelationStatistics Valid=228, Invalid=1332, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:39:54,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-06-12 20:39:55,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1610. [2021-06-12 20:39:55,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1609 states have (on average 3.5027967681789933) internal successors, (5636), 1609 states have internal predecessors, (5636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:55,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 5636 transitions. [2021-06-12 20:39:55,015 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 5636 transitions. Word has length 24 [2021-06-12 20:39:55,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:55,015 INFO L482 AbstractCegarLoop]: Abstraction has 1610 states and 5636 transitions. [2021-06-12 20:39:55,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:55,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 5636 transitions. [2021-06-12 20:39:55,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:39:55,017 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:55,017 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:55,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:55,218 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:39:55,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:55,218 INFO L82 PathProgramCache]: Analyzing trace with hash 837579310, now seen corresponding path program 46 times [2021-06-12 20:39:55,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:55,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183757956] [2021-06-12 20:39:55,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:55,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:55,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:55,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:55,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183757956] [2021-06-12 20:39:55,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183757956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:55,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085855565] [2021-06-12 20:39:55,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:55,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:39:55,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:55,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:55,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:55,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:39:55,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:55,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:55,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:55,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-12 20:39:55,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:55,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085855565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:55,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:55,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:39:55,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604564332] [2021-06-12 20:39:55,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:39:55,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:55,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:39:55,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:39:55,643 INFO L87 Difference]: Start difference. First operand 1610 states and 5636 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:56,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:56,691 INFO L93 Difference]: Finished difference Result 2159 states and 7353 transitions. [2021-06-12 20:39:56,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:39:56,692 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:39:56,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:56,694 INFO L225 Difference]: With dead ends: 2159 [2021-06-12 20:39:56,694 INFO L226 Difference]: Without dead ends: 2149 [2021-06-12 20:39:56,694 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 901.3ms TimeCoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:39:56,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-06-12 20:39:56,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1608. [2021-06-12 20:39:56,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 3.5046670815183574) internal successors, (5632), 1607 states have internal predecessors, (5632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:56,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 5632 transitions. [2021-06-12 20:39:56,714 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 5632 transitions. Word has length 24 [2021-06-12 20:39:56,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:56,714 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 5632 transitions. [2021-06-12 20:39:56,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:56,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 5632 transitions. [2021-06-12 20:39:56,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:39:56,716 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:56,716 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:56,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable230 [2021-06-12 20:39:56,916 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:39:56,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:56,916 INFO L82 PathProgramCache]: Analyzing trace with hash 661037878, now seen corresponding path program 47 times [2021-06-12 20:39:56,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:56,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836296269] [2021-06-12 20:39:56,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:56,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:57,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:57,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:57,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836296269] [2021-06-12 20:39:57,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836296269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:57,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180244267] [2021-06-12 20:39:57,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:57,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:39:57,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:57,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:39:57,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:57,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:39:57,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:57,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:57,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:57,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:39:57,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:57,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180244267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:57,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:57,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:39:57,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364932885] [2021-06-12 20:39:57,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:39:57,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:57,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:39:57,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:39:57,259 INFO L87 Difference]: Start difference. First operand 1608 states and 5632 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:58,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:58,389 INFO L93 Difference]: Finished difference Result 2113 states and 7205 transitions. [2021-06-12 20:39:58,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:39:58,389 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:39:58,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:58,392 INFO L225 Difference]: With dead ends: 2113 [2021-06-12 20:39:58,392 INFO L226 Difference]: Without dead ends: 2104 [2021-06-12 20:39:58,392 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 857.9ms TimeCoverageRelationStatistics Valid=270, Invalid=1452, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:39:58,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-06-12 20:39:58,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1614. [2021-06-12 20:39:58,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1613 states have (on average 3.5015499070055798) internal successors, (5648), 1613 states have internal predecessors, (5648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:58,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 5648 transitions. [2021-06-12 20:39:58,413 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 5648 transitions. Word has length 24 [2021-06-12 20:39:58,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:58,413 INFO L482 AbstractCegarLoop]: Abstraction has 1614 states and 5648 transitions. [2021-06-12 20:39:58,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:58,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 5648 transitions. [2021-06-12 20:39:58,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:39:58,415 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:58,416 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:58,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:58,616 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:39:58,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:58,616 INFO L82 PathProgramCache]: Analyzing trace with hash -172700562, now seen corresponding path program 48 times [2021-06-12 20:39:58,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:58,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259845932] [2021-06-12 20:39:58,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:58,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:58,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:58,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:58,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259845932] [2021-06-12 20:39:58,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259845932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:58,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235897091] [2021-06-12 20:39:58,785 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:58,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:39:58,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:58,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:39:58,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:58,933 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:58,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:39:58,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:39:58,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:39:58,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:39:58,943 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:39:59,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:59,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235897091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:59,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:59,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:39:59,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129966191] [2021-06-12 20:39:59,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:39:59,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:59,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:39:59,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:39:59,039 INFO L87 Difference]: Start difference. First operand 1614 states and 5648 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:00,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:00,462 INFO L93 Difference]: Finished difference Result 2241 states and 7546 transitions. [2021-06-12 20:40:00,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:40:00,462 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:00,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:00,466 INFO L225 Difference]: With dead ends: 2241 [2021-06-12 20:40:00,466 INFO L226 Difference]: Without dead ends: 2222 [2021-06-12 20:40:00,466 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1166.3ms TimeCoverageRelationStatistics Valid=348, Invalid=1722, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:40:00,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2021-06-12 20:40:00,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 1621. [2021-06-12 20:40:00,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 3.504938271604938) internal successors, (5678), 1620 states have internal predecessors, (5678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:00,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 5678 transitions. [2021-06-12 20:40:00,487 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 5678 transitions. Word has length 24 [2021-06-12 20:40:00,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:00,487 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 5678 transitions. [2021-06-12 20:40:00,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:00,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 5678 transitions. [2021-06-12 20:40:00,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:00,489 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:00,489 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:00,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-06-12 20:40:00,690 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:00,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:00,690 INFO L82 PathProgramCache]: Analyzing trace with hash 609133238, now seen corresponding path program 49 times [2021-06-12 20:40:00,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:00,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245082565] [2021-06-12 20:40:00,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:00,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:00,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:00,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:00,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245082565] [2021-06-12 20:40:00,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245082565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:00,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473498863] [2021-06-12 20:40:00,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:00,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:00,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:40:00,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:00,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:40:00,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:00,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:00,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:00,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:40:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:01,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473498863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:01,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:01,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:40:01,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143842537] [2021-06-12 20:40:01,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:40:01,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:01,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:40:01,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:40:01,036 INFO L87 Difference]: Start difference. First operand 1621 states and 5678 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:02,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:02,098 INFO L93 Difference]: Finished difference Result 2080 states and 7089 transitions. [2021-06-12 20:40:02,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:40:02,099 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:02,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:02,102 INFO L225 Difference]: With dead ends: 2080 [2021-06-12 20:40:02,102 INFO L226 Difference]: Without dead ends: 2070 [2021-06-12 20:40:02,102 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 876.4ms TimeCoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:40:02,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2021-06-12 20:40:02,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 1615. [2021-06-12 20:40:02,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1615 states, 1614 states have (on average 3.507434944237918) internal successors, (5661), 1614 states have internal predecessors, (5661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:02,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 5661 transitions. [2021-06-12 20:40:02,122 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 5661 transitions. Word has length 24 [2021-06-12 20:40:02,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:02,122 INFO L482 AbstractCegarLoop]: Abstraction has 1615 states and 5661 transitions. [2021-06-12 20:40:02,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:02,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 5661 transitions. [2021-06-12 20:40:02,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:02,124 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:02,124 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:02,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-12 20:40:02,340 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:02,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:02,340 INFO L82 PathProgramCache]: Analyzing trace with hash -451513034, now seen corresponding path program 50 times [2021-06-12 20:40:02,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:02,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102715843] [2021-06-12 20:40:02,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:02,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:02,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:02,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:02,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102715843] [2021-06-12 20:40:02,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102715843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:02,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939074892] [2021-06-12 20:40:02,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:02,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:40:02,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:02,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 20:40:02,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:02,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:40:02,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:40:02,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:40:02,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:02,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-06-12 20:40:02,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:40:02,790 INFO L628 ElimStorePlain]: treesize reduction 16, result has 61.0 percent of original size [2021-06-12 20:40:02,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:02,792 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:33 [2021-06-12 20:40:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:02,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939074892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:02,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:02,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:40:02,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993459871] [2021-06-12 20:40:02,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:40:02,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:02,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:40:02,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:40:02,875 INFO L87 Difference]: Start difference. First operand 1615 states and 5661 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:04,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:04,096 INFO L93 Difference]: Finished difference Result 2143 states and 7250 transitions. [2021-06-12 20:40:04,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:40:04,096 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:04,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:04,100 INFO L225 Difference]: With dead ends: 2143 [2021-06-12 20:40:04,100 INFO L226 Difference]: Without dead ends: 2116 [2021-06-12 20:40:04,100 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1103.1ms TimeCoverageRelationStatistics Valid=268, Invalid=1712, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:40:04,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2116 states. [2021-06-12 20:40:04,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2116 to 1621. [2021-06-12 20:40:04,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 3.50679012345679) internal successors, (5681), 1620 states have internal predecessors, (5681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:04,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 5681 transitions. [2021-06-12 20:40:04,125 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 5681 transitions. Word has length 24 [2021-06-12 20:40:04,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:04,125 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 5681 transitions. [2021-06-12 20:40:04,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:04,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 5681 transitions. [2021-06-12 20:40:04,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:04,127 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:04,127 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:04,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-12 20:40:04,327 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:04,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:04,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1277158712, now seen corresponding path program 51 times [2021-06-12 20:40:04,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:04,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889862359] [2021-06-12 20:40:04,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:04,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:04,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:04,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:04,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889862359] [2021-06-12 20:40:04,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889862359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:04,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7729088] [2021-06-12 20:40:04,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:04,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:40:04,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:04,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:40:04,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:04,742 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:04,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-12 20:40:04,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:04,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:04,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:04,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-12 20:40:04,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:04,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7729088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:04,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:04,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:40:04,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567824242] [2021-06-12 20:40:04,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:40:04,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:04,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:40:04,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:40:04,817 INFO L87 Difference]: Start difference. First operand 1621 states and 5681 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:06,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:06,631 INFO L93 Difference]: Finished difference Result 2143 states and 7279 transitions. [2021-06-12 20:40:06,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:40:06,631 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:06,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:06,635 INFO L225 Difference]: With dead ends: 2143 [2021-06-12 20:40:06,635 INFO L226 Difference]: Without dead ends: 2124 [2021-06-12 20:40:06,636 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 1546.1ms TimeCoverageRelationStatistics Valid=440, Invalid=2212, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 20:40:06,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2021-06-12 20:40:06,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 1623. [2021-06-12 20:40:06,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1622 states have (on average 3.5067817509247843) internal successors, (5688), 1622 states have internal predecessors, (5688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:06,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 5688 transitions. [2021-06-12 20:40:06,661 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 5688 transitions. Word has length 24 [2021-06-12 20:40:06,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:06,661 INFO L482 AbstractCegarLoop]: Abstraction has 1623 states and 5688 transitions. [2021-06-12 20:40:06,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:06,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 5688 transitions. [2021-06-12 20:40:06,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:06,663 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:06,663 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:06,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable242 [2021-06-12 20:40:06,869 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:06,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:06,869 INFO L82 PathProgramCache]: Analyzing trace with hash 249008852, now seen corresponding path program 52 times [2021-06-12 20:40:06,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:06,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566642177] [2021-06-12 20:40:06,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:06,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:07,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:07,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:07,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566642177] [2021-06-12 20:40:07,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566642177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:07,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393726517] [2021-06-12 20:40:07,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:07,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:40:07,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:07,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:40:07,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:07,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:40:07,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:07,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:07,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:07,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:40:07,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:07,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393726517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:07,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:07,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:40:07,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920746385] [2021-06-12 20:40:07,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:40:07,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:07,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:40:07,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:40:07,258 INFO L87 Difference]: Start difference. First operand 1623 states and 5688 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:08,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:08,576 INFO L93 Difference]: Finished difference Result 2073 states and 7090 transitions. [2021-06-12 20:40:08,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:40:08,576 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:08,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:08,580 INFO L225 Difference]: With dead ends: 2073 [2021-06-12 20:40:08,581 INFO L226 Difference]: Without dead ends: 2063 [2021-06-12 20:40:08,581 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 834.6ms TimeCoverageRelationStatistics Valid=259, Invalid=1223, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:40:08,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-06-12 20:40:08,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1632. [2021-06-12 20:40:08,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1631 states have (on average 3.505824647455549) internal successors, (5718), 1631 states have internal predecessors, (5718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:08,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 5718 transitions. [2021-06-12 20:40:08,604 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 5718 transitions. Word has length 24 [2021-06-12 20:40:08,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:08,604 INFO L482 AbstractCegarLoop]: Abstraction has 1632 states and 5718 transitions. [2021-06-12 20:40:08,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:08,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 5718 transitions. [2021-06-12 20:40:08,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:08,606 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:08,606 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:08,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-12 20:40:08,817 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:08,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:08,817 INFO L82 PathProgramCache]: Analyzing trace with hash 572595030, now seen corresponding path program 53 times [2021-06-12 20:40:08,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:08,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356450659] [2021-06-12 20:40:08,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:08,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:09,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:09,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356450659] [2021-06-12 20:40:09,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356450659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:09,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439629301] [2021-06-12 20:40:09,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:09,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:40:09,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:09,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:40:09,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:09,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:40:09,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:09,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:09,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:09,144 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:40:09,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:09,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439629301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:09,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:09,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:40:09,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438998343] [2021-06-12 20:40:09,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:40:09,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:09,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:40:09,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:40:09,193 INFO L87 Difference]: Start difference. First operand 1632 states and 5718 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:10,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:10,094 INFO L93 Difference]: Finished difference Result 2042 states and 7006 transitions. [2021-06-12 20:40:10,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:40:10,094 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:10,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:10,097 INFO L225 Difference]: With dead ends: 2042 [2021-06-12 20:40:10,097 INFO L226 Difference]: Without dead ends: 2029 [2021-06-12 20:40:10,098 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 808.8ms TimeCoverageRelationStatistics Valid=237, Invalid=1169, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:40:10,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2021-06-12 20:40:10,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 1624. [2021-06-12 20:40:10,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1623 states have (on average 3.507085643869378) internal successors, (5692), 1623 states have internal predecessors, (5692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:10,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 5692 transitions. [2021-06-12 20:40:10,118 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 5692 transitions. Word has length 24 [2021-06-12 20:40:10,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:10,118 INFO L482 AbstractCegarLoop]: Abstraction has 1624 states and 5692 transitions. [2021-06-12 20:40:10,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:10,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 5692 transitions. [2021-06-12 20:40:10,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:10,120 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:10,120 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:10,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-12 20:40:10,320 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:10,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:10,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1571465606, now seen corresponding path program 54 times [2021-06-12 20:40:10,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:10,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6559968] [2021-06-12 20:40:10,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:10,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:10,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:10,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6559968] [2021-06-12 20:40:10,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6559968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:10,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252782416] [2021-06-12 20:40:10,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:10,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:40:10,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:10,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:40:10,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:10,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:40:10,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:40:10,729 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:10,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-06-12 20:40:10,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:40:10,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:10,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:10,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-06-12 20:40:10,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:10,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252782416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:10,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:10,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:40:10,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793989606] [2021-06-12 20:40:10,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:40:10,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:10,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:40:10,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:40:10,799 INFO L87 Difference]: Start difference. First operand 1624 states and 5692 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:11,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:11,795 INFO L93 Difference]: Finished difference Result 2123 states and 7198 transitions. [2021-06-12 20:40:11,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:40:11,795 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:11,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:11,798 INFO L225 Difference]: With dead ends: 2123 [2021-06-12 20:40:11,798 INFO L226 Difference]: Without dead ends: 2104 [2021-06-12 20:40:11,799 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 827.8ms TimeCoverageRelationStatistics Valid=246, Invalid=1476, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:40:11,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-06-12 20:40:11,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1630. [2021-06-12 20:40:11,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1629 states have (on average 3.5058317986494782) internal successors, (5711), 1629 states have internal predecessors, (5711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:11,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 5711 transitions. [2021-06-12 20:40:11,820 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 5711 transitions. Word has length 24 [2021-06-12 20:40:11,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:11,820 INFO L482 AbstractCegarLoop]: Abstraction has 1630 states and 5711 transitions. [2021-06-12 20:40:11,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:11,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 5711 transitions. [2021-06-12 20:40:11,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:11,822 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:11,822 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:12,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:12,023 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:12,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:12,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1459204208, now seen corresponding path program 55 times [2021-06-12 20:40:12,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:12,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566228891] [2021-06-12 20:40:12,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:12,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:12,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:12,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566228891] [2021-06-12 20:40:12,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566228891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:12,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138829288] [2021-06-12 20:40:12,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:12,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:12,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:40:12,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:12,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:40:12,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:12,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:12,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:12,423 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-12 20:40:12,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:12,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138829288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:12,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:12,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:40:12,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959039310] [2021-06-12 20:40:12,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:40:12,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:12,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:40:12,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:40:12,451 INFO L87 Difference]: Start difference. First operand 1630 states and 5711 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:13,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:13,637 INFO L93 Difference]: Finished difference Result 2123 states and 7240 transitions. [2021-06-12 20:40:13,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:40:13,637 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:13,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:13,641 INFO L225 Difference]: With dead ends: 2123 [2021-06-12 20:40:13,641 INFO L226 Difference]: Without dead ends: 2113 [2021-06-12 20:40:13,641 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 956.8ms TimeCoverageRelationStatistics Valid=258, Invalid=1464, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:40:13,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2021-06-12 20:40:13,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 1629. [2021-06-12 20:40:13,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 3.5067567567567566) internal successors, (5709), 1628 states have internal predecessors, (5709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:13,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 5709 transitions. [2021-06-12 20:40:13,662 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 5709 transitions. Word has length 24 [2021-06-12 20:40:13,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:13,662 INFO L482 AbstractCegarLoop]: Abstraction has 1629 states and 5709 transitions. [2021-06-12 20:40:13,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:13,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 5709 transitions. [2021-06-12 20:40:13,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:13,664 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:13,664 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:13,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:13,865 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:13,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:13,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1635745640, now seen corresponding path program 56 times [2021-06-12 20:40:13,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:13,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894811025] [2021-06-12 20:40:13,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:13,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:14,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:14,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:14,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894811025] [2021-06-12 20:40:14,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894811025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:14,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452935821] [2021-06-12 20:40:14,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:14,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:40:14,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:14,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:40:14,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:14,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:14,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:40:14,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:14,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:14,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:14,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:40:14,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:14,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452935821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:14,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:14,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:40:14,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537049261] [2021-06-12 20:40:14,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:40:14,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:14,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:40:14,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:40:14,340 INFO L87 Difference]: Start difference. First operand 1629 states and 5709 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:16,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:16,108 INFO L93 Difference]: Finished difference Result 2214 states and 7495 transitions. [2021-06-12 20:40:16,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 20:40:16,108 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:16,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:16,112 INFO L225 Difference]: With dead ends: 2214 [2021-06-12 20:40:16,112 INFO L226 Difference]: Without dead ends: 2195 [2021-06-12 20:40:16,112 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1508.6ms TimeCoverageRelationStatistics Valid=493, Invalid=2369, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 20:40:16,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2195 states. [2021-06-12 20:40:16,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2195 to 1638. [2021-06-12 20:40:16,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 3.5070250458155163) internal successors, (5741), 1637 states have internal predecessors, (5741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:16,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 5741 transitions. [2021-06-12 20:40:16,135 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 5741 transitions. Word has length 24 [2021-06-12 20:40:16,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:16,135 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 5741 transitions. [2021-06-12 20:40:16,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:16,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 5741 transitions. [2021-06-12 20:40:16,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:16,137 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:16,137 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:16,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:16,337 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:16,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:16,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1825483216, now seen corresponding path program 57 times [2021-06-12 20:40:16,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:16,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377864990] [2021-06-12 20:40:16,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:16,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:16,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:16,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:16,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377864990] [2021-06-12 20:40:16,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377864990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:16,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278870556] [2021-06-12 20:40:16,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:16,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:40:16,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:16,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:40:16,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:16,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:40:16,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:16,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:16,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:16,665 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:40:16,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:16,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278870556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:16,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:16,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:40:16,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182097953] [2021-06-12 20:40:16,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:40:16,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:16,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:40:16,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:40:16,710 INFO L87 Difference]: Start difference. First operand 1638 states and 5741 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:17,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:17,748 INFO L93 Difference]: Finished difference Result 2105 states and 7183 transitions. [2021-06-12 20:40:17,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:40:17,748 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:17,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:17,751 INFO L225 Difference]: With dead ends: 2105 [2021-06-12 20:40:17,751 INFO L226 Difference]: Without dead ends: 2095 [2021-06-12 20:40:17,751 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 842.4ms TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:40:17,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2021-06-12 20:40:17,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 1636. [2021-06-12 20:40:17,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1635 states have (on average 3.507645259938838) internal successors, (5735), 1635 states have internal predecessors, (5735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:17,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 5735 transitions. [2021-06-12 20:40:17,770 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 5735 transitions. Word has length 24 [2021-06-12 20:40:17,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:17,770 INFO L482 AbstractCegarLoop]: Abstraction has 1636 states and 5735 transitions. [2021-06-12 20:40:17,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:17,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 5735 transitions. [2021-06-12 20:40:17,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:17,772 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:17,772 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:17,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-12 20:40:17,973 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:17,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:17,973 INFO L82 PathProgramCache]: Analyzing trace with hash 224079120, now seen corresponding path program 58 times [2021-06-12 20:40:17,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:17,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025621480] [2021-06-12 20:40:17,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:18,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:18,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:18,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025621480] [2021-06-12 20:40:18,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025621480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:18,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595898629] [2021-06-12 20:40:18,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:18,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:40:18,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:18,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:40:18,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:18,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:40:18,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:18,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:18,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:18,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:40:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:18,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595898629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:18,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:18,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:40:18,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937372144] [2021-06-12 20:40:18,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:40:18,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:18,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:40:18,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:40:18,367 INFO L87 Difference]: Start difference. First operand 1636 states and 5735 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:19,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:19,554 INFO L93 Difference]: Finished difference Result 2128 states and 7250 transitions. [2021-06-12 20:40:19,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:40:19,555 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:19,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:19,558 INFO L225 Difference]: With dead ends: 2128 [2021-06-12 20:40:19,558 INFO L226 Difference]: Without dead ends: 2109 [2021-06-12 20:40:19,558 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 864.5ms TimeCoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:40:19,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2109 states. [2021-06-12 20:40:19,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2109 to 1643. [2021-06-12 20:40:19,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1642 states have (on average 3.509744214372716) internal successors, (5763), 1642 states have internal predecessors, (5763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:19,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 5763 transitions. [2021-06-12 20:40:19,585 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 5763 transitions. Word has length 24 [2021-06-12 20:40:19,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:19,585 INFO L482 AbstractCegarLoop]: Abstraction has 1643 states and 5763 transitions. [2021-06-12 20:40:19,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:19,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 5763 transitions. [2021-06-12 20:40:19,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:19,587 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:19,587 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:19,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-12 20:40:19,788 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:19,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:19,788 INFO L82 PathProgramCache]: Analyzing trace with hash -804070740, now seen corresponding path program 59 times [2021-06-12 20:40:19,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:19,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123675213] [2021-06-12 20:40:19,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:19,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:19,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:19,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:19,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123675213] [2021-06-12 20:40:19,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123675213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:19,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497999392] [2021-06-12 20:40:19,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:19,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:40:19,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:19,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:40:19,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:20,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:40:20,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:20,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:20,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:20,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:40:20,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:20,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497999392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:20,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:20,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:40:20,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363428844] [2021-06-12 20:40:20,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:40:20,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:20,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:40:20,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:40:20,129 INFO L87 Difference]: Start difference. First operand 1643 states and 5763 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:20,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:20,906 INFO L93 Difference]: Finished difference Result 2129 states and 7275 transitions. [2021-06-12 20:40:20,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:40:20,907 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:20,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:20,910 INFO L225 Difference]: With dead ends: 2129 [2021-06-12 20:40:20,910 INFO L226 Difference]: Without dead ends: 2119 [2021-06-12 20:40:20,910 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 711.3ms TimeCoverageRelationStatistics Valid=242, Invalid=1164, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:40:20,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2021-06-12 20:40:20,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 1651. [2021-06-12 20:40:20,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.5090909090909093) internal successors, (5790), 1650 states have internal predecessors, (5790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:20,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5790 transitions. [2021-06-12 20:40:20,930 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5790 transitions. Word has length 24 [2021-06-12 20:40:20,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:20,931 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5790 transitions. [2021-06-12 20:40:20,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:20,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5790 transitions. [2021-06-12 20:40:20,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:20,933 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:20,933 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:21,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-12 20:40:21,133 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:21,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:21,134 INFO L82 PathProgramCache]: Analyzing trace with hash -480484562, now seen corresponding path program 60 times [2021-06-12 20:40:21,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:21,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112613947] [2021-06-12 20:40:21,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:21,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:21,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:21,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:21,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112613947] [2021-06-12 20:40:21,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112613947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:21,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377623599] [2021-06-12 20:40:21,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:21,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:40:21,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:21,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:40:21,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:21,458 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:21,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:40:21,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:21,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:21,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:21,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:40:21,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:21,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377623599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:21,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:21,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:40:21,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65604022] [2021-06-12 20:40:21,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:40:21,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:21,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:40:21,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:40:21,555 INFO L87 Difference]: Start difference. First operand 1651 states and 5790 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:22,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:22,632 INFO L93 Difference]: Finished difference Result 2134 states and 7234 transitions. [2021-06-12 20:40:22,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:40:22,632 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:22,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:22,635 INFO L225 Difference]: With dead ends: 2134 [2021-06-12 20:40:22,635 INFO L226 Difference]: Without dead ends: 2115 [2021-06-12 20:40:22,636 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 944.6ms TimeCoverageRelationStatistics Valid=294, Invalid=1346, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:40:22,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2021-06-12 20:40:22,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1650. [2021-06-12 20:40:22,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1649 states have (on average 3.5106124924196482) internal successors, (5789), 1649 states have internal predecessors, (5789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:22,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 5789 transitions. [2021-06-12 20:40:22,681 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 5789 transitions. Word has length 24 [2021-06-12 20:40:22,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:22,681 INFO L482 AbstractCegarLoop]: Abstraction has 1650 states and 5789 transitions. [2021-06-12 20:40:22,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:22,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 5789 transitions. [2021-06-12 20:40:22,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:22,683 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:22,683 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:22,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-06-12 20:40:22,899 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:22,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:22,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1205259560, now seen corresponding path program 61 times [2021-06-12 20:40:22,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:22,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165665022] [2021-06-12 20:40:22,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:22,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:23,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:23,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:23,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165665022] [2021-06-12 20:40:23,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165665022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:23,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319148166] [2021-06-12 20:40:23,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:23,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:23,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:40:23,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:23,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:40:23,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:23,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:23,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:23,196 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:40:23,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:23,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319148166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:23,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:23,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:40:23,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159888627] [2021-06-12 20:40:23,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:40:23,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:23,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:40:23,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:40:23,235 INFO L87 Difference]: Start difference. First operand 1650 states and 5789 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:24,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:24,017 INFO L93 Difference]: Finished difference Result 2040 states and 6997 transitions. [2021-06-12 20:40:24,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:40:24,018 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:24,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:24,020 INFO L225 Difference]: With dead ends: 2040 [2021-06-12 20:40:24,020 INFO L226 Difference]: Without dead ends: 2027 [2021-06-12 20:40:24,020 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 643.8ms TimeCoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:40:24,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-06-12 20:40:24,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1645. [2021-06-12 20:40:24,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1644 states have (on average 3.5097323600973236) internal successors, (5770), 1644 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:24,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 5770 transitions. [2021-06-12 20:40:24,040 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 5770 transitions. Word has length 24 [2021-06-12 20:40:24,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:24,040 INFO L482 AbstractCegarLoop]: Abstraction has 1645 states and 5770 transitions. [2021-06-12 20:40:24,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:24,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 5770 transitions. [2021-06-12 20:40:24,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:24,042 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:24,042 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:24,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:24,242 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:24,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:24,242 INFO L82 PathProgramCache]: Analyzing trace with hash 843525824, now seen corresponding path program 62 times [2021-06-12 20:40:24,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:24,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127851779] [2021-06-12 20:40:24,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:24,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:24,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:24,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:24,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127851779] [2021-06-12 20:40:24,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127851779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:24,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885296094] [2021-06-12 20:40:24,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:24,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:40:24,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:24,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 20:40:24,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:24,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:40:24,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:40:24,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 12 [2021-06-12 20:40:24,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:24,647 INFO L628 ElimStorePlain]: treesize reduction 3, result has 85.0 percent of original size [2021-06-12 20:40:24,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:24,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:17 [2021-06-12 20:40:24,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:24,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885296094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:24,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:24,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:40:24,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730848385] [2021-06-12 20:40:24,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:40:24,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:24,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:40:24,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:40:24,696 INFO L87 Difference]: Start difference. First operand 1645 states and 5770 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:25,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:25,401 INFO L93 Difference]: Finished difference Result 2123 states and 7208 transitions. [2021-06-12 20:40:25,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:40:25,402 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:25,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:25,405 INFO L225 Difference]: With dead ends: 2123 [2021-06-12 20:40:25,405 INFO L226 Difference]: Without dead ends: 2071 [2021-06-12 20:40:25,405 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 522.1ms TimeCoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:40:25,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-06-12 20:40:25,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1648. [2021-06-12 20:40:25,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1647 states have (on average 3.5088038858530664) internal successors, (5779), 1647 states have internal predecessors, (5779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:25,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 5779 transitions. [2021-06-12 20:40:25,425 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 5779 transitions. Word has length 24 [2021-06-12 20:40:25,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:25,425 INFO L482 AbstractCegarLoop]: Abstraction has 1648 states and 5779 transitions. [2021-06-12 20:40:25,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:25,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 5779 transitions. [2021-06-12 20:40:25,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:25,427 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:25,427 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:25,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:25,628 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:25,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:25,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1060950710, now seen corresponding path program 63 times [2021-06-12 20:40:25,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:25,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396074867] [2021-06-12 20:40:25,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:25,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:25,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:25,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:25,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396074867] [2021-06-12 20:40:25,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396074867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:25,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246764045] [2021-06-12 20:40:25,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:25,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:40:25,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:25,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 20:40:25,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:26,017 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:26,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-12 20:40:26,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:26,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:26,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:26,031 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:37 [2021-06-12 20:40:26,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:26,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246764045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:26,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:26,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:40:26,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597819770] [2021-06-12 20:40:26,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:40:26,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:26,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:40:26,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:40:26,201 INFO L87 Difference]: Start difference. First operand 1648 states and 5779 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:27,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:27,265 INFO L93 Difference]: Finished difference Result 2110 states and 7189 transitions. [2021-06-12 20:40:27,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:40:27,265 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:27,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:27,268 INFO L225 Difference]: With dead ends: 2110 [2021-06-12 20:40:27,268 INFO L226 Difference]: Without dead ends: 2091 [2021-06-12 20:40:27,268 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 958.2ms TimeCoverageRelationStatistics Valid=269, Invalid=1537, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:40:27,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-06-12 20:40:27,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1651. [2021-06-12 20:40:27,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.5090909090909093) internal successors, (5790), 1650 states have internal predecessors, (5790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:27,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5790 transitions. [2021-06-12 20:40:27,289 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5790 transitions. Word has length 24 [2021-06-12 20:40:27,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:27,289 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5790 transitions. [2021-06-12 20:40:27,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:27,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5790 transitions. [2021-06-12 20:40:27,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:27,291 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:27,291 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:27,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:27,491 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:27,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:27,491 INFO L82 PathProgramCache]: Analyzing trace with hash 227212270, now seen corresponding path program 64 times [2021-06-12 20:40:27,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:27,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883539705] [2021-06-12 20:40:27,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:27,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:27,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:27,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883539705] [2021-06-12 20:40:27,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883539705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:27,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67205717] [2021-06-12 20:40:27,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:27,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:40:27,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:27,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:40:27,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:27,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:40:27,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:27,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:27,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:27,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:40:27,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:27,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67205717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:27,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:27,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:40:27,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191789599] [2021-06-12 20:40:27,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:40:27,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:27,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:40:27,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:40:27,869 INFO L87 Difference]: Start difference. First operand 1651 states and 5790 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:28,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:28,847 INFO L93 Difference]: Finished difference Result 2132 states and 7279 transitions. [2021-06-12 20:40:28,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:40:28,847 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:28,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:28,850 INFO L225 Difference]: With dead ends: 2132 [2021-06-12 20:40:28,850 INFO L226 Difference]: Without dead ends: 2119 [2021-06-12 20:40:28,850 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 788.2ms TimeCoverageRelationStatistics Valid=248, Invalid=1312, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:40:28,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2021-06-12 20:40:28,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 1649. [2021-06-12 20:40:28,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 3.5097087378640777) internal successors, (5784), 1648 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:28,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 5784 transitions. [2021-06-12 20:40:28,870 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 5784 transitions. Word has length 24 [2021-06-12 20:40:28,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:28,870 INFO L482 AbstractCegarLoop]: Abstraction has 1649 states and 5784 transitions. [2021-06-12 20:40:28,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:28,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 5784 transitions. [2021-06-12 20:40:28,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:28,872 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:28,872 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:29,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:29,073 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:29,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:29,073 INFO L82 PathProgramCache]: Analyzing trace with hash -605413130, now seen corresponding path program 65 times [2021-06-12 20:40:29,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:29,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300932891] [2021-06-12 20:40:29,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:29,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:29,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:29,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:29,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300932891] [2021-06-12 20:40:29,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300932891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:29,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126633426] [2021-06-12 20:40:29,265 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:29,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:40:29,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:29,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:40:29,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:29,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:40:29,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:29,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:29,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:29,393 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:40:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:29,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126633426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:29,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:29,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:40:29,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261688919] [2021-06-12 20:40:29,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:40:29,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:29,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:40:29,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:40:29,448 INFO L87 Difference]: Start difference. First operand 1649 states and 5784 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:30,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:30,371 INFO L93 Difference]: Finished difference Result 2060 states and 7057 transitions. [2021-06-12 20:40:30,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:40:30,371 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:30,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:30,374 INFO L225 Difference]: With dead ends: 2060 [2021-06-12 20:40:30,374 INFO L226 Difference]: Without dead ends: 2051 [2021-06-12 20:40:30,374 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 795.2ms TimeCoverageRelationStatistics Valid=248, Invalid=1234, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:40:30,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-06-12 20:40:30,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1653. [2021-06-12 20:40:30,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 3.5090799031476996) internal successors, (5797), 1652 states have internal predecessors, (5797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:30,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 5797 transitions. [2021-06-12 20:40:30,394 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 5797 transitions. Word has length 24 [2021-06-12 20:40:30,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:30,394 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 5797 transitions. [2021-06-12 20:40:30,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:30,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 5797 transitions. [2021-06-12 20:40:30,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:30,396 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:30,396 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:30,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:30,599 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:30,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:30,599 INFO L82 PathProgramCache]: Analyzing trace with hash -281826952, now seen corresponding path program 66 times [2021-06-12 20:40:30,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:30,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376920782] [2021-06-12 20:40:30,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:30,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:30,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:30,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:30,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376920782] [2021-06-12 20:40:30,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376920782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:30,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237749235] [2021-06-12 20:40:30,760 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:30,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:40:30,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:30,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:40:30,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:30,884 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:30,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:40:30,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:30,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:30,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:30,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-12 20:40:31,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:31,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237749235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:31,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:31,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:40:31,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526287921] [2021-06-12 20:40:31,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:40:31,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:31,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:40:31,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:40:31,014 INFO L87 Difference]: Start difference. First operand 1653 states and 5797 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:32,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:32,354 INFO L93 Difference]: Finished difference Result 2157 states and 7303 transitions. [2021-06-12 20:40:32,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:40:32,354 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:32,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:32,357 INFO L225 Difference]: With dead ends: 2157 [2021-06-12 20:40:32,357 INFO L226 Difference]: Without dead ends: 2138 [2021-06-12 20:40:32,357 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1113.6ms TimeCoverageRelationStatistics Valid=365, Invalid=1615, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:40:32,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-06-12 20:40:32,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1657. [2021-06-12 20:40:32,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1656 states have (on average 3.510265700483092) internal successors, (5813), 1656 states have internal predecessors, (5813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:32,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 5813 transitions. [2021-06-12 20:40:32,385 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 5813 transitions. Word has length 24 [2021-06-12 20:40:32,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:32,385 INFO L482 AbstractCegarLoop]: Abstraction has 1657 states and 5813 transitions. [2021-06-12 20:40:32,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:32,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 5813 transitions. [2021-06-12 20:40:32,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:32,387 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:32,387 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:32,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:32,587 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:32,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:32,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1403917170, now seen corresponding path program 67 times [2021-06-12 20:40:32,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:32,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196869456] [2021-06-12 20:40:32,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:32,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:32,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:32,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:32,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196869456] [2021-06-12 20:40:32,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196869456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:32,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038812350] [2021-06-12 20:40:32,743 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:32,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:32,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:40:32,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:32,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:40:32,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:32,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:32,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:32,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:40:32,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:32,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038812350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:32,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:32,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:40:32,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167155039] [2021-06-12 20:40:32,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:40:32,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:32,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:40:32,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:40:32,924 INFO L87 Difference]: Start difference. First operand 1657 states and 5813 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:33,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:33,714 INFO L93 Difference]: Finished difference Result 2022 states and 6937 transitions. [2021-06-12 20:40:33,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:40:33,714 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:33,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:33,716 INFO L225 Difference]: With dead ends: 2022 [2021-06-12 20:40:33,717 INFO L226 Difference]: Without dead ends: 2011 [2021-06-12 20:40:33,717 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 703.5ms TimeCoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:40:33,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2021-06-12 20:40:33,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 1656. [2021-06-12 20:40:33,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 3.5099697885196375) internal successors, (5809), 1655 states have internal predecessors, (5809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:33,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 5809 transitions. [2021-06-12 20:40:33,736 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 5809 transitions. Word has length 24 [2021-06-12 20:40:33,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:33,736 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 5809 transitions. [2021-06-12 20:40:33,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:33,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 5809 transitions. [2021-06-12 20:40:33,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:33,738 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:33,738 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:33,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-12 20:40:33,938 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:33,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:33,938 INFO L82 PathProgramCache]: Analyzing trace with hash -308336314, now seen corresponding path program 68 times [2021-06-12 20:40:33,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:33,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845982044] [2021-06-12 20:40:33,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:33,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:34,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:34,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:34,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845982044] [2021-06-12 20:40:34,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845982044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:34,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152386107] [2021-06-12 20:40:34,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:34,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:40:34,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:34,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:40:34,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:34,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:40:34,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:34,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:34,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:34,229 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:40:34,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:34,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152386107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:34,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:34,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:40:34,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595020437] [2021-06-12 20:40:34,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:40:34,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:34,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:40:34,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:40:34,292 INFO L87 Difference]: Start difference. First operand 1656 states and 5809 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:35,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:35,186 INFO L93 Difference]: Finished difference Result 2080 states and 7118 transitions. [2021-06-12 20:40:35,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:40:35,186 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:35,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:35,189 INFO L225 Difference]: With dead ends: 2080 [2021-06-12 20:40:35,189 INFO L226 Difference]: Without dead ends: 2071 [2021-06-12 20:40:35,189 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 732.6ms TimeCoverageRelationStatistics Valid=242, Invalid=1240, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:40:35,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-06-12 20:40:35,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1657. [2021-06-12 20:40:35,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1656 states have (on average 3.510265700483092) internal successors, (5813), 1656 states have internal predecessors, (5813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:35,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 5813 transitions. [2021-06-12 20:40:35,208 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 5813 transitions. Word has length 24 [2021-06-12 20:40:35,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:35,217 INFO L482 AbstractCegarLoop]: Abstraction has 1657 states and 5813 transitions. [2021-06-12 20:40:35,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:35,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 5813 transitions. [2021-06-12 20:40:35,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:35,219 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:35,219 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:35,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-12 20:40:35,435 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:35,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:35,435 INFO L82 PathProgramCache]: Analyzing trace with hash -2099197488, now seen corresponding path program 69 times [2021-06-12 20:40:35,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:35,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469066085] [2021-06-12 20:40:35,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:35,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:35,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:35,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469066085] [2021-06-12 20:40:35,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469066085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:35,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009794859] [2021-06-12 20:40:35,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:35,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:40:35,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:35,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 20:40:35,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:35,753 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:35,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 53 [2021-06-12 20:40:35,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:35,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:35,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:35,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:476 [2021-06-12 20:40:35,980 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-06-12 20:40:36,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:36,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009794859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:36,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:36,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:40:36,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235483344] [2021-06-12 20:40:36,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:40:36,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:36,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:40:36,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:40:36,248 INFO L87 Difference]: Start difference. First operand 1657 states and 5813 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:36,952 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-06-12 20:40:37,194 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-06-12 20:40:37,907 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-06-12 20:40:38,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:38,512 INFO L93 Difference]: Finished difference Result 2129 states and 7217 transitions. [2021-06-12 20:40:38,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 20:40:38,513 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:38,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:38,516 INFO L225 Difference]: With dead ends: 2129 [2021-06-12 20:40:38,516 INFO L226 Difference]: Without dead ends: 2119 [2021-06-12 20:40:38,516 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 2337.2ms TimeCoverageRelationStatistics Valid=471, Invalid=2285, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 20:40:38,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2021-06-12 20:40:38,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 1661. [2021-06-12 20:40:38,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1660 states have (on average 3.5096385542168673) internal successors, (5826), 1660 states have internal predecessors, (5826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:38,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 5826 transitions. [2021-06-12 20:40:38,536 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 5826 transitions. Word has length 24 [2021-06-12 20:40:38,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:38,536 INFO L482 AbstractCegarLoop]: Abstraction has 1661 states and 5826 transitions. [2021-06-12 20:40:38,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:38,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 5826 transitions. [2021-06-12 20:40:38,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:38,538 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:38,538 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:38,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-12 20:40:38,739 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:38,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:38,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1317363688, now seen corresponding path program 70 times [2021-06-12 20:40:38,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:38,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154425457] [2021-06-12 20:40:38,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:38,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:38,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:38,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:38,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154425457] [2021-06-12 20:40:38,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154425457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:38,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245113132] [2021-06-12 20:40:38,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:38,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:40:38,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:38,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:40:38,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:39,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:40:39,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:39,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:39,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:39,069 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:40:39,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:39,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245113132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:39,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:39,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:40:39,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411703697] [2021-06-12 20:40:39,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:40:39,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:39,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:40:39,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:40:39,136 INFO L87 Difference]: Start difference. First operand 1661 states and 5826 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:39,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:39,821 INFO L93 Difference]: Finished difference Result 2022 states and 6939 transitions. [2021-06-12 20:40:39,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:40:39,821 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:39,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:39,824 INFO L225 Difference]: With dead ends: 2022 [2021-06-12 20:40:39,824 INFO L226 Difference]: Without dead ends: 2012 [2021-06-12 20:40:39,824 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 634.9ms TimeCoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:40:39,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2012 states. [2021-06-12 20:40:39,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2012 to 1658. [2021-06-12 20:40:39,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 3.5093542546771275) internal successors, (5815), 1657 states have internal predecessors, (5815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:39,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 5815 transitions. [2021-06-12 20:40:39,852 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 5815 transitions. Word has length 24 [2021-06-12 20:40:39,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:39,852 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 5815 transitions. [2021-06-12 20:40:39,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:39,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 5815 transitions. [2021-06-12 20:40:39,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:39,854 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:39,854 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:40,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:40,055 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:40,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:40,055 INFO L82 PathProgramCache]: Analyzing trace with hash -372308144, now seen corresponding path program 71 times [2021-06-12 20:40:40,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:40,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203836513] [2021-06-12 20:40:40,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:40,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:40,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:40,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:40,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203836513] [2021-06-12 20:40:40,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203836513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:40,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597894656] [2021-06-12 20:40:40,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:40,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:40:40,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:40,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:40:40,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:40,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:40:40,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:40,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:40,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:40,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:40:40,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:40,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597894656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:40,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:40,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:40:40,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957497744] [2021-06-12 20:40:40,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:40:40,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:40,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:40:40,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:40:40,397 INFO L87 Difference]: Start difference. First operand 1658 states and 5815 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:41,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:41,300 INFO L93 Difference]: Finished difference Result 2057 states and 7052 transitions. [2021-06-12 20:40:41,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:40:41,301 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:41,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:41,303 INFO L225 Difference]: With dead ends: 2057 [2021-06-12 20:40:41,303 INFO L226 Difference]: Without dead ends: 2046 [2021-06-12 20:40:41,303 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 691.1ms TimeCoverageRelationStatistics Valid=218, Invalid=1114, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:40:41,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-06-12 20:40:41,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1660. [2021-06-12 20:40:41,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 1659 states have (on average 3.5087402049427365) internal successors, (5821), 1659 states have internal predecessors, (5821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:41,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 5821 transitions. [2021-06-12 20:40:41,323 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 5821 transitions. Word has length 24 [2021-06-12 20:40:41,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:41,323 INFO L482 AbstractCegarLoop]: Abstraction has 1660 states and 5821 transitions. [2021-06-12 20:40:41,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:41,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 5821 transitions. [2021-06-12 20:40:41,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:41,325 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:41,325 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:41,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:41,526 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:41,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:41,526 INFO L82 PathProgramCache]: Analyzing trace with hash 607106304, now seen corresponding path program 72 times [2021-06-12 20:40:41,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:41,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966392210] [2021-06-12 20:40:41,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:41,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:41,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:41,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:41,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966392210] [2021-06-12 20:40:41,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966392210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:41,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375252457] [2021-06-12 20:40:41,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:41,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:40:41,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:41,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:40:41,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:41,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:41,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:40:41,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:41,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:41,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:41,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-12 20:40:42,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:42,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375252457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:42,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:42,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:40:42,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674298237] [2021-06-12 20:40:42,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:40:42,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:42,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:40:42,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:40:42,043 INFO L87 Difference]: Start difference. First operand 1660 states and 5821 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:43,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:43,400 INFO L93 Difference]: Finished difference Result 2168 states and 7318 transitions. [2021-06-12 20:40:43,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:40:43,405 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:43,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:43,408 INFO L225 Difference]: With dead ends: 2168 [2021-06-12 20:40:43,408 INFO L226 Difference]: Without dead ends: 2149 [2021-06-12 20:40:43,408 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1184.1ms TimeCoverageRelationStatistics Valid=387, Invalid=1775, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:40:43,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-06-12 20:40:43,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1662. [2021-06-12 20:40:43,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 3.5099337748344372) internal successors, (5830), 1661 states have internal predecessors, (5830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:43,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 5830 transitions. [2021-06-12 20:40:43,430 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 5830 transitions. Word has length 24 [2021-06-12 20:40:43,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:43,431 INFO L482 AbstractCegarLoop]: Abstraction has 1662 states and 5830 transitions. [2021-06-12 20:40:43,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:43,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 5830 transitions. [2021-06-12 20:40:43,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:43,433 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:43,433 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:43,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2021-06-12 20:40:43,633 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:43,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:43,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1967070794, now seen corresponding path program 73 times [2021-06-12 20:40:43,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:43,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306704420] [2021-06-12 20:40:43,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:43,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:43,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:43,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:43,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306704420] [2021-06-12 20:40:43,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306704420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:43,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518551713] [2021-06-12 20:40:43,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:43,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:43,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:40:43,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:43,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:40:43,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:43,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:43,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:43,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:40:43,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:43,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518551713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:43,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:43,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:40:43,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986944618] [2021-06-12 20:40:43,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:40:43,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:43,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:40:43,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:40:43,966 INFO L87 Difference]: Start difference. First operand 1662 states and 5830 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:44,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:44,662 INFO L93 Difference]: Finished difference Result 2006 states and 6892 transitions. [2021-06-12 20:40:44,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:40:44,663 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:44,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:44,666 INFO L225 Difference]: With dead ends: 2006 [2021-06-12 20:40:44,666 INFO L226 Difference]: Without dead ends: 1996 [2021-06-12 20:40:44,666 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 626.4ms TimeCoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:40:44,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2021-06-12 20:40:44,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1660. [2021-06-12 20:40:44,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 1659 states have (on average 3.5099457504520797) internal successors, (5823), 1659 states have internal predecessors, (5823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:44,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 5823 transitions. [2021-06-12 20:40:44,689 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 5823 transitions. Word has length 24 [2021-06-12 20:40:44,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:44,689 INFO L482 AbstractCegarLoop]: Abstraction has 1660 states and 5823 transitions. [2021-06-12 20:40:44,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:44,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 5823 transitions. [2021-06-12 20:40:44,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:44,691 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:44,691 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:44,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:44,892 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:44,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:44,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1147399810, now seen corresponding path program 69 times [2021-06-12 20:40:44,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:44,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639605334] [2021-06-12 20:40:44,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:44,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:45,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:45,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:45,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639605334] [2021-06-12 20:40:45,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639605334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:45,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868151154] [2021-06-12 20:40:45,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:45,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:40:45,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:45,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:40:45,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:45,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:40:45,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:40:45,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:40:45,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:45,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:45,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:45,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 20:40:45,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:45,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868151154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:45,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:45,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:40:45,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563059001] [2021-06-12 20:40:45,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:40:45,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:45,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:40:45,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:40:45,340 INFO L87 Difference]: Start difference. First operand 1660 states and 5823 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:46,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:46,321 INFO L93 Difference]: Finished difference Result 2254 states and 7645 transitions. [2021-06-12 20:40:46,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:40:46,321 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:46,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:46,324 INFO L225 Difference]: With dead ends: 2254 [2021-06-12 20:40:46,324 INFO L226 Difference]: Without dead ends: 2244 [2021-06-12 20:40:46,324 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 736.0ms TimeCoverageRelationStatistics Valid=243, Invalid=1563, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:40:46,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2021-06-12 20:40:46,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 1663. [2021-06-12 20:40:46,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 3.509025270758123) internal successors, (5832), 1662 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:46,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 5832 transitions. [2021-06-12 20:40:46,345 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 5832 transitions. Word has length 24 [2021-06-12 20:40:46,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:46,345 INFO L482 AbstractCegarLoop]: Abstraction has 1663 states and 5832 transitions. [2021-06-12 20:40:46,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:46,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 5832 transitions. [2021-06-12 20:40:46,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:46,347 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:46,347 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:46,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:46,547 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:46,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:46,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1639485428, now seen corresponding path program 70 times [2021-06-12 20:40:46,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:46,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751470067] [2021-06-12 20:40:46,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:46,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:46,734 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:46,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:46,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751470067] [2021-06-12 20:40:46,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751470067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:46,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104622360] [2021-06-12 20:40:46,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:46,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:40:46,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:46,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:40:46,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:46,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:40:46,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:46,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:46,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:46,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:40:46,931 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:46,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104622360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:46,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:46,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:40:46,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474876975] [2021-06-12 20:40:46,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:40:46,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:46,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:40:46,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:40:46,932 INFO L87 Difference]: Start difference. First operand 1663 states and 5832 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:48,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:48,155 INFO L93 Difference]: Finished difference Result 2340 states and 7929 transitions. [2021-06-12 20:40:48,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:40:48,155 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:48,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:48,158 INFO L225 Difference]: With dead ends: 2340 [2021-06-12 20:40:48,158 INFO L226 Difference]: Without dead ends: 2318 [2021-06-12 20:40:48,158 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 938.5ms TimeCoverageRelationStatistics Valid=275, Invalid=1617, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:40:48,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2021-06-12 20:40:48,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 1666. [2021-06-12 20:40:48,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1665 states have (on average 3.5081081081081082) internal successors, (5841), 1665 states have internal predecessors, (5841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:48,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 5841 transitions. [2021-06-12 20:40:48,179 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 5841 transitions. Word has length 24 [2021-06-12 20:40:48,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:48,180 INFO L482 AbstractCegarLoop]: Abstraction has 1666 states and 5841 transitions. [2021-06-12 20:40:48,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:48,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 5841 transitions. [2021-06-12 20:40:48,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:48,182 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:48,182 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:48,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:48,382 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:48,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:48,382 INFO L82 PathProgramCache]: Analyzing trace with hash -719238356, now seen corresponding path program 71 times [2021-06-12 20:40:48,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:48,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012390785] [2021-06-12 20:40:48,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:48,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:48,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:48,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:48,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012390785] [2021-06-12 20:40:48,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012390785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:48,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723874435] [2021-06-12 20:40:48,548 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:48,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:40:48,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:48,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:40:48,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:48,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:40:48,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:40:48,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:40:48,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:40:48,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 12 [2021-06-12 20:40:48,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:48,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:48,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:48,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:5 [2021-06-12 20:40:48,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:48,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723874435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:48,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:48,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:40:48,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999014790] [2021-06-12 20:40:48,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:40:48,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:48,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:40:48,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:40:48,831 INFO L87 Difference]: Start difference. First operand 1666 states and 5841 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:49,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:49,971 INFO L93 Difference]: Finished difference Result 2248 states and 7620 transitions. [2021-06-12 20:40:49,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:40:49,972 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:49,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:49,975 INFO L225 Difference]: With dead ends: 2248 [2021-06-12 20:40:49,975 INFO L226 Difference]: Without dead ends: 2226 [2021-06-12 20:40:49,975 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 872.0ms TimeCoverageRelationStatistics Valid=242, Invalid=1650, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:40:49,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-06-12 20:40:49,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1669. [2021-06-12 20:40:49,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 3.5071942446043165) internal successors, (5850), 1668 states have internal predecessors, (5850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:49,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 5850 transitions. [2021-06-12 20:40:49,996 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 5850 transitions. Word has length 24 [2021-06-12 20:40:49,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:49,996 INFO L482 AbstractCegarLoop]: Abstraction has 1669 states and 5850 transitions. [2021-06-12 20:40:49,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:49,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 5850 transitions. [2021-06-12 20:40:49,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:49,998 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:49,998 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:50,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:50,201 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:50,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:50,201 INFO L82 PathProgramCache]: Analyzing trace with hash -895779788, now seen corresponding path program 72 times [2021-06-12 20:40:50,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:50,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911291552] [2021-06-12 20:40:50,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:50,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:50,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:50,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:50,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911291552] [2021-06-12 20:40:50,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911291552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:50,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261649311] [2021-06-12 20:40:50,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:50,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:40:50,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:50,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:40:50,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:50,499 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:50,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:40:50,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:50,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:50,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:50,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:40:50,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:50,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261649311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:50,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:50,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:40:50,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876756136] [2021-06-12 20:40:50,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:40:50,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:50,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:40:50,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:40:50,585 INFO L87 Difference]: Start difference. First operand 1669 states and 5850 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:51,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:51,521 INFO L93 Difference]: Finished difference Result 2232 states and 7581 transitions. [2021-06-12 20:40:51,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:40:51,521 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:51,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:51,524 INFO L225 Difference]: With dead ends: 2232 [2021-06-12 20:40:51,524 INFO L226 Difference]: Without dead ends: 2222 [2021-06-12 20:40:51,524 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 856.9ms TimeCoverageRelationStatistics Valid=310, Invalid=1760, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:40:51,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2021-06-12 20:40:51,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 1673. [2021-06-12 20:40:51,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1672 states have (on average 3.5053827751196174) internal successors, (5861), 1672 states have internal predecessors, (5861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:51,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 5861 transitions. [2021-06-12 20:40:51,545 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 5861 transitions. Word has length 24 [2021-06-12 20:40:51,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:51,545 INFO L482 AbstractCegarLoop]: Abstraction has 1673 states and 5861 transitions. [2021-06-12 20:40:51,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:51,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 5861 transitions. [2021-06-12 20:40:51,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:51,547 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:51,547 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:51,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-06-12 20:40:51,748 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:51,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:51,748 INFO L82 PathProgramCache]: Analyzing trace with hash -412454626, now seen corresponding path program 73 times [2021-06-12 20:40:51,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:51,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403839643] [2021-06-12 20:40:51,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:51,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:51,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:51,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403839643] [2021-06-12 20:40:51,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403839643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:51,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770427046] [2021-06-12 20:40:51,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:51,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:51,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:40:51,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:52,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:40:52,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:52,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:52,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:52,062 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:40:52,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:52,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770427046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:52,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:52,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:40:52,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481418610] [2021-06-12 20:40:52,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:40:52,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:52,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:40:52,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:40:52,107 INFO L87 Difference]: Start difference. First operand 1673 states and 5861 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:52,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:52,987 INFO L93 Difference]: Finished difference Result 2202 states and 7495 transitions. [2021-06-12 20:40:52,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:40:52,987 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:52,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:52,990 INFO L225 Difference]: With dead ends: 2202 [2021-06-12 20:40:52,990 INFO L226 Difference]: Without dead ends: 2191 [2021-06-12 20:40:52,990 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 698.7ms TimeCoverageRelationStatistics Valid=245, Invalid=1395, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:40:52,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2191 states. [2021-06-12 20:40:53,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2191 to 1660. [2021-06-12 20:40:53,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 1659 states have (on average 3.5099457504520797) internal successors, (5823), 1659 states have internal predecessors, (5823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:53,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 5823 transitions. [2021-06-12 20:40:53,010 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 5823 transitions. Word has length 24 [2021-06-12 20:40:53,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:53,010 INFO L482 AbstractCegarLoop]: Abstraction has 1660 states and 5823 transitions. [2021-06-12 20:40:53,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:53,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 5823 transitions. [2021-06-12 20:40:53,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:53,012 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:53,012 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:53,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-12 20:40:53,213 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:53,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:53,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1796534024, now seen corresponding path program 74 times [2021-06-12 20:40:53,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:53,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704423465] [2021-06-12 20:40:53,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:53,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:53,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:53,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:53,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704423465] [2021-06-12 20:40:53,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704423465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:53,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778430590] [2021-06-12 20:40:53,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:53,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:40:53,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:53,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:40:53,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:53,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:40:53,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:40:53,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:40:53,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:53,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:53,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:53,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 20:40:53,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:53,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778430590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:53,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:53,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:40:53,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508153494] [2021-06-12 20:40:53,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:40:53,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:53,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:40:53,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:40:53,621 INFO L87 Difference]: Start difference. First operand 1660 states and 5823 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:54,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:54,633 INFO L93 Difference]: Finished difference Result 2228 states and 7569 transitions. [2021-06-12 20:40:54,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:40:54,633 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:54,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:54,636 INFO L225 Difference]: With dead ends: 2228 [2021-06-12 20:40:54,636 INFO L226 Difference]: Without dead ends: 2219 [2021-06-12 20:40:54,636 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 716.4ms TimeCoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:40:54,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2219 states. [2021-06-12 20:40:54,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2219 to 1663. [2021-06-12 20:40:54,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 3.5096269554753308) internal successors, (5833), 1662 states have internal predecessors, (5833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:54,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 5833 transitions. [2021-06-12 20:40:54,657 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 5833 transitions. Word has length 24 [2021-06-12 20:40:54,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:54,657 INFO L482 AbstractCegarLoop]: Abstraction has 1663 states and 5833 transitions. [2021-06-12 20:40:54,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:54,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 5833 transitions. [2021-06-12 20:40:54,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:54,659 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:54,659 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:54,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-06-12 20:40:54,859 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:54,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:54,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1586996644, now seen corresponding path program 75 times [2021-06-12 20:40:54,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:54,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848194649] [2021-06-12 20:40:54,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:54,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:55,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:55,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:55,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848194649] [2021-06-12 20:40:55,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848194649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:55,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019342445] [2021-06-12 20:40:55,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:55,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:40:55,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:55,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:40:55,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:55,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:40:55,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:55,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:55,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:55,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:40:55,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:55,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019342445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:55,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:55,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:40:55,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797349160] [2021-06-12 20:40:55,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:40:55,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:55,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:40:55,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:40:55,243 INFO L87 Difference]: Start difference. First operand 1663 states and 5833 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:56,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:56,362 INFO L93 Difference]: Finished difference Result 2272 states and 7714 transitions. [2021-06-12 20:40:56,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:40:56,362 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:56,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:56,365 INFO L225 Difference]: With dead ends: 2272 [2021-06-12 20:40:56,365 INFO L226 Difference]: Without dead ends: 2253 [2021-06-12 20:40:56,365 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 861.7ms TimeCoverageRelationStatistics Valid=275, Invalid=1617, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:40:56,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2021-06-12 20:40:56,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 1666. [2021-06-12 20:40:56,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1665 states have (on average 3.5093093093093093) internal successors, (5843), 1665 states have internal predecessors, (5843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:56,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 5843 transitions. [2021-06-12 20:40:56,386 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 5843 transitions. Word has length 24 [2021-06-12 20:40:56,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:56,386 INFO L482 AbstractCegarLoop]: Abstraction has 1666 states and 5843 transitions. [2021-06-12 20:40:56,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:56,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 5843 transitions. [2021-06-12 20:40:56,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:56,388 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:56,388 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:56,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:56,589 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:56,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:56,589 INFO L82 PathProgramCache]: Analyzing trace with hash -979298906, now seen corresponding path program 76 times [2021-06-12 20:40:56,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:56,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855072592] [2021-06-12 20:40:56,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:56,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:56,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:56,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:56,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855072592] [2021-06-12 20:40:56,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855072592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:56,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680177660] [2021-06-12 20:40:56,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:56,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:40:56,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:56,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:40:56,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:56,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:40:56,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:56,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:56,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:56,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:40:56,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:56,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680177660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:56,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:56,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:40:56,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535248350] [2021-06-12 20:40:56,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:40:56,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:56,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:40:56,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:40:56,948 INFO L87 Difference]: Start difference. First operand 1666 states and 5843 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:58,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:58,020 INFO L93 Difference]: Finished difference Result 2224 states and 7572 transitions. [2021-06-12 20:40:58,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:40:58,020 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:58,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:58,023 INFO L225 Difference]: With dead ends: 2224 [2021-06-12 20:40:58,024 INFO L226 Difference]: Without dead ends: 2205 [2021-06-12 20:40:58,024 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 827.7ms TimeCoverageRelationStatistics Valid=268, Invalid=1538, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:40:58,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2021-06-12 20:40:58,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 1669. [2021-06-12 20:40:58,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 3.508992805755396) internal successors, (5853), 1668 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:58,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 5853 transitions. [2021-06-12 20:40:58,044 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 5853 transitions. Word has length 24 [2021-06-12 20:40:58,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:58,045 INFO L482 AbstractCegarLoop]: Abstraction has 1669 states and 5853 transitions. [2021-06-12 20:40:58,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:58,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 5853 transitions. [2021-06-12 20:40:58,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:58,046 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:58,047 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:58,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-06-12 20:40:58,247 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:58,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:58,247 INFO L82 PathProgramCache]: Analyzing trace with hash -2007448766, now seen corresponding path program 77 times [2021-06-12 20:40:58,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:58,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175650261] [2021-06-12 20:40:58,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:58,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:58,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:58,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:58,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175650261] [2021-06-12 20:40:58,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175650261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:58,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239255043] [2021-06-12 20:40:58,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:58,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:40:58,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:58,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:40:58,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:58,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:40:58,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:58,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:58,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:40:58,541 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:40:58,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:58,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239255043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:58,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:58,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:40:58,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796420260] [2021-06-12 20:40:58,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:40:58,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:58,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:40:58,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:40:58,583 INFO L87 Difference]: Start difference. First operand 1669 states and 5853 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:59,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:59,244 INFO L93 Difference]: Finished difference Result 2193 states and 7486 transitions. [2021-06-12 20:40:59,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:40:59,245 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:40:59,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:59,247 INFO L225 Difference]: With dead ends: 2193 [2021-06-12 20:40:59,247 INFO L226 Difference]: Without dead ends: 2184 [2021-06-12 20:40:59,248 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 609.3ms TimeCoverageRelationStatistics Valid=221, Invalid=1111, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:40:59,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2021-06-12 20:40:59,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 1676. [2021-06-12 20:40:59,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.5074626865671643) internal successors, (5875), 1675 states have internal predecessors, (5875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:59,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5875 transitions. [2021-06-12 20:40:59,277 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5875 transitions. Word has length 24 [2021-06-12 20:40:59,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:59,277 INFO L482 AbstractCegarLoop]: Abstraction has 1676 states and 5875 transitions. [2021-06-12 20:40:59,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:59,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5875 transitions. [2021-06-12 20:40:59,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:40:59,279 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:59,279 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:59,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:59,480 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:40:59,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:59,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1881534, now seen corresponding path program 78 times [2021-06-12 20:40:59,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:59,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215540877] [2021-06-12 20:40:59,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:59,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:59,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:59,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:59,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215540877] [2021-06-12 20:40:59,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215540877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:59,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678769198] [2021-06-12 20:40:59,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:59,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:40:59,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:59,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 20:40:59,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:59,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:40:59,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:40:59,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:59,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 49 [2021-06-12 20:40:59,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:40:59,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:40:59,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:40:59,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:118 [2021-06-12 20:40:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:40:59,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678769198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:59,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:59,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-12 20:40:59,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707521665] [2021-06-12 20:40:59,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:40:59,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:59,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:40:59,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:40:59,950 INFO L87 Difference]: Start difference. First operand 1676 states and 5875 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:00,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:00,927 INFO L93 Difference]: Finished difference Result 2099 states and 7191 transitions. [2021-06-12 20:41:00,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:41:00,928 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:41:00,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:00,931 INFO L225 Difference]: With dead ends: 2099 [2021-06-12 20:41:00,931 INFO L226 Difference]: Without dead ends: 2086 [2021-06-12 20:41:00,931 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 830.5ms TimeCoverageRelationStatistics Valid=247, Invalid=1475, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:41:00,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2021-06-12 20:41:00,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 1680. [2021-06-12 20:41:00,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.5080405002977963) internal successors, (5890), 1679 states have internal predecessors, (5890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:00,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 5890 transitions. [2021-06-12 20:41:00,951 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 5890 transitions. Word has length 24 [2021-06-12 20:41:00,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:00,951 INFO L482 AbstractCegarLoop]: Abstraction has 1680 states and 5890 transitions. [2021-06-12 20:41:00,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:00,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 5890 transitions. [2021-06-12 20:41:00,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:41:00,953 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:00,953 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:01,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:01,154 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:41:01,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:01,154 INFO L82 PathProgramCache]: Analyzing trace with hash -528846374, now seen corresponding path program 79 times [2021-06-12 20:41:01,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:01,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613885425] [2021-06-12 20:41:01,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:01,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:01,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:01,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:01,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613885425] [2021-06-12 20:41:01,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613885425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:01,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254541508] [2021-06-12 20:41:01,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:01,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:41:01,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:01,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:41:01,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:01,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:01,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:01,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:41:01,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:01,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254541508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:01,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:01,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:41:01,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37769088] [2021-06-12 20:41:01,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:41:01,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:01,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:41:01,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:41:01,486 INFO L87 Difference]: Start difference. First operand 1680 states and 5890 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:02,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:02,212 INFO L93 Difference]: Finished difference Result 2165 states and 7395 transitions. [2021-06-12 20:41:02,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:41:02,213 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:41:02,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:02,216 INFO L225 Difference]: With dead ends: 2165 [2021-06-12 20:41:02,216 INFO L226 Difference]: Without dead ends: 2156 [2021-06-12 20:41:02,216 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 597.6ms TimeCoverageRelationStatistics Valid=207, Invalid=1125, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:41:02,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2021-06-12 20:41:02,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 1669. [2021-06-12 20:41:02,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 3.5077937649880098) internal successors, (5851), 1668 states have internal predecessors, (5851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:02,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 5851 transitions. [2021-06-12 20:41:02,237 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 5851 transitions. Word has length 24 [2021-06-12 20:41:02,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:02,237 INFO L482 AbstractCegarLoop]: Abstraction has 1669 states and 5851 transitions. [2021-06-12 20:41:02,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:02,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 5851 transitions. [2021-06-12 20:41:02,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:41:02,239 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:02,239 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:02,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-06-12 20:41:02,439 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:41:02,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:02,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1485847398, now seen corresponding path program 74 times [2021-06-12 20:41:02,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:02,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769296600] [2021-06-12 20:41:02,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:02,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:02,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:02,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769296600] [2021-06-12 20:41:02,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769296600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:02,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796399725] [2021-06-12 20:41:02,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:02,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:41:02,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:02,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:41:02,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:02,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:41:02,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:41:02,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:41:02,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:02,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:02,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:02,836 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 20:41:02,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:02,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796399725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:02,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:02,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:41:02,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235938641] [2021-06-12 20:41:02,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:41:02,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:02,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:41:02,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:41:02,866 INFO L87 Difference]: Start difference. First operand 1669 states and 5851 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:04,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:04,266 INFO L93 Difference]: Finished difference Result 2362 states and 7905 transitions. [2021-06-12 20:41:04,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 20:41:04,266 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:41:04,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:04,269 INFO L225 Difference]: With dead ends: 2362 [2021-06-12 20:41:04,269 INFO L226 Difference]: Without dead ends: 2302 [2021-06-12 20:41:04,270 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1145.0ms TimeCoverageRelationStatistics Valid=341, Invalid=2109, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:41:04,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2302 states. [2021-06-12 20:41:04,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2302 to 1674. [2021-06-12 20:41:04,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 3.506276150627615) internal successors, (5866), 1673 states have internal predecessors, (5866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:04,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 5866 transitions. [2021-06-12 20:41:04,290 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 5866 transitions. Word has length 24 [2021-06-12 20:41:04,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:04,290 INFO L482 AbstractCegarLoop]: Abstraction has 1674 states and 5866 transitions. [2021-06-12 20:41:04,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:04,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 5866 transitions. [2021-06-12 20:41:04,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:41:04,292 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:04,292 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:04,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-06-12 20:41:04,493 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:41:04,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:04,493 INFO L82 PathProgramCache]: Analyzing trace with hash -221549916, now seen corresponding path program 75 times [2021-06-12 20:41:04,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:04,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683294097] [2021-06-12 20:41:04,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:04,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:04,657 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:04,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:04,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683294097] [2021-06-12 20:41:04,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683294097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:04,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145690317] [2021-06-12 20:41:04,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:04,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:41:04,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:04,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:41:04,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:04,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:41:04,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:04,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:04,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:04,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:41:04,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:04,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145690317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:04,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:04,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:41:04,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656596645] [2021-06-12 20:41:04,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:41:04,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:04,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:41:04,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:41:04,860 INFO L87 Difference]: Start difference. First operand 1674 states and 5866 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:06,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:06,385 INFO L93 Difference]: Finished difference Result 2284 states and 7716 transitions. [2021-06-12 20:41:06,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 20:41:06,385 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:41:06,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:06,388 INFO L225 Difference]: With dead ends: 2284 [2021-06-12 20:41:06,389 INFO L226 Difference]: Without dead ends: 2242 [2021-06-12 20:41:06,389 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 1216.9ms TimeCoverageRelationStatistics Valid=386, Invalid=2266, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 20:41:06,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2021-06-12 20:41:06,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 1677. [2021-06-12 20:41:06,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1676 states have (on average 3.5053699284009547) internal successors, (5875), 1676 states have internal predecessors, (5875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:06,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 5875 transitions. [2021-06-12 20:41:06,409 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 5875 transitions. Word has length 24 [2021-06-12 20:41:06,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:06,409 INFO L482 AbstractCegarLoop]: Abstraction has 1677 states and 5875 transitions. [2021-06-12 20:41:06,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:06,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 5875 transitions. [2021-06-12 20:41:06,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:41:06,411 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:06,411 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:06,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable317 [2021-06-12 20:41:06,611 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:41:06,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:06,611 INFO L82 PathProgramCache]: Analyzing trace with hash -398091348, now seen corresponding path program 76 times [2021-06-12 20:41:06,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:06,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9366651] [2021-06-12 20:41:06,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:06,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:06,753 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:06,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:06,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9366651] [2021-06-12 20:41:06,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9366651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:06,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871168086] [2021-06-12 20:41:06,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:06,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:41:06,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:06,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:41:06,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:06,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:41:06,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:06,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:06,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:06,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:41:06,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:06,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871168086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:06,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:06,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:41:06,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138902075] [2021-06-12 20:41:06,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:41:06,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:06,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:41:06,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:41:06,945 INFO L87 Difference]: Start difference. First operand 1677 states and 5875 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:07,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:07,999 INFO L93 Difference]: Finished difference Result 2173 states and 7397 transitions. [2021-06-12 20:41:08,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 20:41:08,000 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:41:08,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:08,002 INFO L225 Difference]: With dead ends: 2173 [2021-06-12 20:41:08,002 INFO L226 Difference]: Without dead ends: 2143 [2021-06-12 20:41:08,003 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 899.1ms TimeCoverageRelationStatistics Valid=354, Invalid=1808, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:41:08,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2021-06-12 20:41:08,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 1679. [2021-06-12 20:41:08,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1679 states, 1678 states have (on average 3.505363528009535) internal successors, (5882), 1678 states have internal predecessors, (5882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:08,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1679 states to 1679 states and 5882 transitions. [2021-06-12 20:41:08,022 INFO L78 Accepts]: Start accepts. Automaton has 1679 states and 5882 transitions. Word has length 24 [2021-06-12 20:41:08,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:08,022 INFO L482 AbstractCegarLoop]: Abstraction has 1679 states and 5882 transitions. [2021-06-12 20:41:08,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:08,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1679 states and 5882 transitions. [2021-06-12 20:41:08,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:41:08,024 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:08,024 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:08,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:08,224 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:41:08,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:08,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1231829788, now seen corresponding path program 77 times [2021-06-12 20:41:08,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:08,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309616878] [2021-06-12 20:41:08,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:08,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:08,371 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:08,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:08,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309616878] [2021-06-12 20:41:08,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309616878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:08,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322172219] [2021-06-12 20:41:08,372 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:08,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:41:08,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:08,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:41:08,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:08,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:41:08,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:08,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:08,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:08,510 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:41:08,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:08,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322172219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:08,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:08,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:41:08,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444982724] [2021-06-12 20:41:08,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:41:08,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:08,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:41:08,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:41:08,552 INFO L87 Difference]: Start difference. First operand 1679 states and 5882 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:09,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:09,527 INFO L93 Difference]: Finished difference Result 2149 states and 7324 transitions. [2021-06-12 20:41:09,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:41:09,528 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:41:09,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:09,530 INFO L225 Difference]: With dead ends: 2149 [2021-06-12 20:41:09,530 INFO L226 Difference]: Without dead ends: 2123 [2021-06-12 20:41:09,531 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 775.2ms TimeCoverageRelationStatistics Valid=272, Invalid=1534, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:41:09,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2021-06-12 20:41:09,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 1671. [2021-06-12 20:41:09,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1671 states, 1670 states have (on average 3.507185628742515) internal successors, (5857), 1670 states have internal predecessors, (5857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:09,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 5857 transitions. [2021-06-12 20:41:09,550 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 5857 transitions. Word has length 24 [2021-06-12 20:41:09,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:09,550 INFO L482 AbstractCegarLoop]: Abstraction has 1671 states and 5857 transitions. [2021-06-12 20:41:09,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:09,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 5857 transitions. [2021-06-12 20:41:09,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:41:09,552 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:09,552 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:09,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:09,754 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:41:09,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:09,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1241517520, now seen corresponding path program 80 times [2021-06-12 20:41:09,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:09,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270598650] [2021-06-12 20:41:09,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:09,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:09,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:09,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270598650] [2021-06-12 20:41:09,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270598650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:09,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644339879] [2021-06-12 20:41:09,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:09,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:41:09,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:09,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:41:09,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:10,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:41:10,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:41:10,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:41:10,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:10,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:10,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:10,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 20:41:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:10,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644339879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:10,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:10,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:41:10,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920874096] [2021-06-12 20:41:10,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:41:10,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:10,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:41:10,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:41:10,192 INFO L87 Difference]: Start difference. First operand 1671 states and 5857 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:11,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:11,569 INFO L93 Difference]: Finished difference Result 2325 states and 7797 transitions. [2021-06-12 20:41:11,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 20:41:11,570 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:41:11,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:11,573 INFO L225 Difference]: With dead ends: 2325 [2021-06-12 20:41:11,573 INFO L226 Difference]: Without dead ends: 2275 [2021-06-12 20:41:11,573 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1137.5ms TimeCoverageRelationStatistics Valid=359, Invalid=2191, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:41:11,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2275 states. [2021-06-12 20:41:11,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2275 to 1674. [2021-06-12 20:41:11,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 3.5068738792588166) internal successors, (5867), 1673 states have internal predecessors, (5867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:11,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 5867 transitions. [2021-06-12 20:41:11,593 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 5867 transitions. Word has length 24 [2021-06-12 20:41:11,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:11,593 INFO L482 AbstractCegarLoop]: Abstraction has 1674 states and 5867 transitions. [2021-06-12 20:41:11,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:11,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 5867 transitions. [2021-06-12 20:41:11,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:41:11,595 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:11,595 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:11,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-06-12 20:41:11,797 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:41:11,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:11,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1324778030, now seen corresponding path program 81 times [2021-06-12 20:41:11,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:11,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063039948] [2021-06-12 20:41:11,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:11,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:12,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:12,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:12,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063039948] [2021-06-12 20:41:12,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063039948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:12,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472800382] [2021-06-12 20:41:12,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:12,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:41:12,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:12,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:41:12,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:12,212 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:12,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-12 20:41:12,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:12,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:12,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:12,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-12 20:41:12,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:12,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472800382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:12,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:12,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:41:12,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801971524] [2021-06-12 20:41:12,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:41:12,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:12,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:41:12,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:41:12,285 INFO L87 Difference]: Start difference. First operand 1674 states and 5867 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:14,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:14,721 INFO L93 Difference]: Finished difference Result 2304 states and 7763 transitions. [2021-06-12 20:41:14,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 20:41:14,721 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:41:14,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:14,724 INFO L225 Difference]: With dead ends: 2304 [2021-06-12 20:41:14,724 INFO L226 Difference]: Without dead ends: 2265 [2021-06-12 20:41:14,724 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 2045.0ms TimeCoverageRelationStatistics Valid=579, Invalid=3327, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 20:41:14,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2021-06-12 20:41:14,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 1677. [2021-06-12 20:41:14,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1676 states have (on average 3.506563245823389) internal successors, (5877), 1676 states have internal predecessors, (5877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:14,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 5877 transitions. [2021-06-12 20:41:14,745 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 5877 transitions. Word has length 24 [2021-06-12 20:41:14,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:14,745 INFO L482 AbstractCegarLoop]: Abstraction has 1677 states and 5877 transitions. [2021-06-12 20:41:14,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:14,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 5877 transitions. [2021-06-12 20:41:14,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:41:14,747 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:14,747 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:14,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable321,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:14,947 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:41:14,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:14,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1942039406, now seen corresponding path program 82 times [2021-06-12 20:41:14,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:14,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599709849] [2021-06-12 20:41:14,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:15,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:15,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:15,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599709849] [2021-06-12 20:41:15,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599709849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:15,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843885864] [2021-06-12 20:41:15,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:15,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:41:15,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:15,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:41:15,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:15,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:41:15,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:15,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:15,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:15,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:41:15,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:15,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843885864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:15,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:15,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:41:15,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576664732] [2021-06-12 20:41:15,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:41:15,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:15,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:41:15,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:41:15,292 INFO L87 Difference]: Start difference. First operand 1677 states and 5877 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:16,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:16,377 INFO L93 Difference]: Finished difference Result 2148 states and 7323 transitions. [2021-06-12 20:41:16,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:41:16,377 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:41:16,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:16,379 INFO L225 Difference]: With dead ends: 2148 [2021-06-12 20:41:16,379 INFO L226 Difference]: Without dead ends: 2122 [2021-06-12 20:41:16,380 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 862.8ms TimeCoverageRelationStatistics Valid=329, Invalid=1651, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:41:16,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-06-12 20:41:16,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1680. [2021-06-12 20:41:16,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.5050625372245383) internal successors, (5885), 1679 states have internal predecessors, (5885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:16,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 5885 transitions. [2021-06-12 20:41:16,399 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 5885 transitions. Word has length 24 [2021-06-12 20:41:16,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:16,399 INFO L482 AbstractCegarLoop]: Abstraction has 1680 states and 5885 transitions. [2021-06-12 20:41:16,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:16,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 5885 transitions. [2021-06-12 20:41:16,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:41:16,401 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:16,401 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:16,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-06-12 20:41:16,601 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:41:16,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:16,602 INFO L82 PathProgramCache]: Analyzing trace with hash -2029341712, now seen corresponding path program 83 times [2021-06-12 20:41:16,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:16,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453484860] [2021-06-12 20:41:16,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:16,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:16,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:16,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:16,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453484860] [2021-06-12 20:41:16,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453484860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:16,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995643148] [2021-06-12 20:41:16,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:16,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:41:16,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:16,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:41:16,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:16,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:41:16,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:16,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:16,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:16,880 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:41:16,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:16,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995643148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:16,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:16,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:41:16,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639612201] [2021-06-12 20:41:16,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:41:16,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:16,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:41:16,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:41:16,922 INFO L87 Difference]: Start difference. First operand 1680 states and 5885 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:17,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:17,788 INFO L93 Difference]: Finished difference Result 2123 states and 7249 transitions. [2021-06-12 20:41:17,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:41:17,789 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:41:17,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:17,792 INFO L225 Difference]: With dead ends: 2123 [2021-06-12 20:41:17,792 INFO L226 Difference]: Without dead ends: 2098 [2021-06-12 20:41:17,792 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 716.2ms TimeCoverageRelationStatistics Valid=234, Invalid=1248, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:41:17,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2021-06-12 20:41:17,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1671. [2021-06-12 20:41:17,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1671 states, 1670 states have (on average 3.507185628742515) internal successors, (5857), 1670 states have internal predecessors, (5857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:17,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 5857 transitions. [2021-06-12 20:41:17,812 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 5857 transitions. Word has length 24 [2021-06-12 20:41:17,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:17,812 INFO L482 AbstractCegarLoop]: Abstraction has 1671 states and 5857 transitions. [2021-06-12 20:41:17,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:17,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 5857 transitions. [2021-06-12 20:41:17,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:41:17,814 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:17,814 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:18,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-06-12 20:41:18,015 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:41:18,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:18,015 INFO L82 PathProgramCache]: Analyzing trace with hash -738169602, now seen corresponding path program 78 times [2021-06-12 20:41:18,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:18,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961865608] [2021-06-12 20:41:18,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:18,166 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:18,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:18,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961865608] [2021-06-12 20:41:18,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961865608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:18,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167053725] [2021-06-12 20:41:18,167 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:18,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:41:18,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:18,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:41:18,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:18,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:41:18,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:41:18,384 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:18,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 40 [2021-06-12 20:41:18,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:41:18,472 INFO L628 ElimStorePlain]: treesize reduction 31, result has 44.6 percent of original size [2021-06-12 20:41:18,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:18,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2021-06-12 20:41:18,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:18,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167053725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:18,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:18,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:41:18,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918035596] [2021-06-12 20:41:18,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:41:18,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:18,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:41:18,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:41:18,553 INFO L87 Difference]: Start difference. First operand 1671 states and 5857 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:20,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:20,578 INFO L93 Difference]: Finished difference Result 2486 states and 8299 transitions. [2021-06-12 20:41:20,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 20:41:20,579 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:41:20,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:20,582 INFO L225 Difference]: With dead ends: 2486 [2021-06-12 20:41:20,582 INFO L226 Difference]: Without dead ends: 2396 [2021-06-12 20:41:20,582 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1490.6ms TimeCoverageRelationStatistics Valid=418, Invalid=2774, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 20:41:20,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2396 states. [2021-06-12 20:41:20,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2396 to 1686. [2021-06-12 20:41:20,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 3.5050445103857566) internal successors, (5906), 1685 states have internal predecessors, (5906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:20,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 5906 transitions. [2021-06-12 20:41:20,603 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 5906 transitions. Word has length 24 [2021-06-12 20:41:20,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:20,603 INFO L482 AbstractCegarLoop]: Abstraction has 1686 states and 5906 transitions. [2021-06-12 20:41:20,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:20,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 5906 transitions. [2021-06-12 20:41:20,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:41:20,605 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:20,605 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:20,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-12 20:41:20,805 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:41:20,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:20,806 INFO L82 PathProgramCache]: Analyzing trace with hash -520744716, now seen corresponding path program 79 times [2021-06-12 20:41:20,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:20,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742430315] [2021-06-12 20:41:20,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:20,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:20,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:20,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742430315] [2021-06-12 20:41:20,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742430315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:20,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788484764] [2021-06-12 20:41:20,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:20,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:20,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:41:20,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:21,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:41:21,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:21,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:21,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:21,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:41:21,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:21,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788484764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:21,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:21,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:41:21,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554374731] [2021-06-12 20:41:21,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:41:21,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:21,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:41:21,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:41:21,133 INFO L87 Difference]: Start difference. First operand 1686 states and 5906 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:22,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:22,904 INFO L93 Difference]: Finished difference Result 2547 states and 8513 transitions. [2021-06-12 20:41:22,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 20:41:22,904 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:41:22,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:22,908 INFO L225 Difference]: With dead ends: 2547 [2021-06-12 20:41:22,908 INFO L226 Difference]: Without dead ends: 2487 [2021-06-12 20:41:22,908 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 1482.4ms TimeCoverageRelationStatistics Valid=611, Invalid=2811, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 20:41:22,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2021-06-12 20:41:22,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 1726. [2021-06-12 20:41:22,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1725 states have (on average 3.508985507246377) internal successors, (6053), 1725 states have internal predecessors, (6053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:22,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 6053 transitions. [2021-06-12 20:41:22,930 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 6053 transitions. Word has length 24 [2021-06-12 20:41:22,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:22,930 INFO L482 AbstractCegarLoop]: Abstraction has 1726 states and 6053 transitions. [2021-06-12 20:41:22,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:22,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 6053 transitions. [2021-06-12 20:41:22,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:41:22,932 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:22,932 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:23,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:23,133 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:41:23,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:23,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1354483156, now seen corresponding path program 80 times [2021-06-12 20:41:23,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:23,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009743870] [2021-06-12 20:41:23,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:23,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:23,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:23,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:23,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009743870] [2021-06-12 20:41:23,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009743870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:23,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331271098] [2021-06-12 20:41:23,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:23,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:41:23,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:23,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:41:23,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:23,438 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:23,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:41:23,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:23,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:23,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:23,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:41:23,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:23,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331271098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:23,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:23,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:41:23,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546133364] [2021-06-12 20:41:23,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:41:23,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:23,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:41:23,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:41:23,531 INFO L87 Difference]: Start difference. First operand 1726 states and 6053 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:25,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:25,236 INFO L93 Difference]: Finished difference Result 2452 states and 8252 transitions. [2021-06-12 20:41:25,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 20:41:25,237 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:41:25,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:25,240 INFO L225 Difference]: With dead ends: 2452 [2021-06-12 20:41:25,240 INFO L226 Difference]: Without dead ends: 2401 [2021-06-12 20:41:25,240 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 1513.2ms TimeCoverageRelationStatistics Valid=551, Invalid=2989, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 20:41:25,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2401 states. [2021-06-12 20:41:25,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2401 to 1748. [2021-06-12 20:41:25,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1747 states have (on average 3.5060103033772183) internal successors, (6125), 1747 states have internal predecessors, (6125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:25,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 6125 transitions. [2021-06-12 20:41:25,261 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 6125 transitions. Word has length 24 [2021-06-12 20:41:25,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:25,262 INFO L482 AbstractCegarLoop]: Abstraction has 1748 states and 6125 transitions. [2021-06-12 20:41:25,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:25,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 6125 transitions. [2021-06-12 20:41:25,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:41:25,264 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:25,264 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:25,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:25,464 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:41:25,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:25,464 INFO L82 PathProgramCache]: Analyzing trace with hash -96000760, now seen corresponding path program 84 times [2021-06-12 20:41:25,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:25,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403396055] [2021-06-12 20:41:25,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:25,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:25,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403396055] [2021-06-12 20:41:25,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403396055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:25,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438159426] [2021-06-12 20:41:25,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:25,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:41:25,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:25,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:41:25,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:25,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:41:25,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:41:25,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:41:25,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:25,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:25,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:25,860 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 20:41:25,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:25,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438159426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:25,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:25,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:41:25,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33235868] [2021-06-12 20:41:25,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:41:25,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:25,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:41:25,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:41:25,886 INFO L87 Difference]: Start difference. First operand 1748 states and 6125 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:28,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:28,237 INFO L93 Difference]: Finished difference Result 2604 states and 8741 transitions. [2021-06-12 20:41:28,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 20:41:28,237 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:41:28,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:28,241 INFO L225 Difference]: With dead ends: 2604 [2021-06-12 20:41:28,241 INFO L226 Difference]: Without dead ends: 2546 [2021-06-12 20:41:28,242 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 1885.4ms TimeCoverageRelationStatistics Valid=752, Invalid=3940, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 20:41:28,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2546 states. [2021-06-12 20:41:28,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2546 to 1755. [2021-06-12 20:41:28,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1755 states, 1754 states have (on average 3.506841505131129) internal successors, (6151), 1754 states have internal predecessors, (6151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:28,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 6151 transitions. [2021-06-12 20:41:28,268 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 6151 transitions. Word has length 24 [2021-06-12 20:41:28,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:28,268 INFO L482 AbstractCegarLoop]: Abstraction has 1755 states and 6151 transitions. [2021-06-12 20:41:28,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:28,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 6151 transitions. [2021-06-12 20:41:28,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:41:28,270 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:28,270 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:28,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-12 20:41:28,471 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:41:28,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:28,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1124150620, now seen corresponding path program 85 times [2021-06-12 20:41:28,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:28,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710779815] [2021-06-12 20:41:28,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:28,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:28,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:28,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:28,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710779815] [2021-06-12 20:41:28,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710779815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:28,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811930253] [2021-06-12 20:41:28,623 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:28,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:28,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:41:28,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:28,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:41:28,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:28,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:28,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:28,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:41:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:28,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811930253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:28,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:28,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:41:28,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651934200] [2021-06-12 20:41:28,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:41:28,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:28,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:41:28,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:41:28,804 INFO L87 Difference]: Start difference. First operand 1755 states and 6151 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:30,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:30,549 INFO L93 Difference]: Finished difference Result 2476 states and 8372 transitions. [2021-06-12 20:41:30,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 20:41:30,549 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:41:30,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:30,552 INFO L225 Difference]: With dead ends: 2476 [2021-06-12 20:41:30,552 INFO L226 Difference]: Without dead ends: 2434 [2021-06-12 20:41:30,552 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 1412.5ms TimeCoverageRelationStatistics Valid=536, Invalid=2544, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 20:41:30,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2434 states. [2021-06-12 20:41:30,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2434 to 1765. [2021-06-12 20:41:30,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1765 states, 1764 states have (on average 3.5051020408163267) internal successors, (6183), 1764 states have internal predecessors, (6183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:30,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 6183 transitions. [2021-06-12 20:41:30,575 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 6183 transitions. Word has length 24 [2021-06-12 20:41:30,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:30,575 INFO L482 AbstractCegarLoop]: Abstraction has 1765 states and 6183 transitions. [2021-06-12 20:41:30,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:30,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 6183 transitions. [2021-06-12 20:41:30,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:41:30,577 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:30,577 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:30,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-06-12 20:41:30,777 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:41:30,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:30,778 INFO L82 PathProgramCache]: Analyzing trace with hash -800564442, now seen corresponding path program 86 times [2021-06-12 20:41:30,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:30,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347275500] [2021-06-12 20:41:30,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:30,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:30,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:30,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:30,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347275500] [2021-06-12 20:41:30,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347275500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:30,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809802176] [2021-06-12 20:41:30,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:30,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:41:30,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:30,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:41:30,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:31,051 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:31,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:41:31,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:31,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:31,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:31,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:41:31,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:31,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809802176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:31,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:31,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:41:31,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681467987] [2021-06-12 20:41:31,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:41:31,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:31,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:41:31,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:41:31,144 INFO L87 Difference]: Start difference. First operand 1765 states and 6183 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:33,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:33,269 INFO L93 Difference]: Finished difference Result 2476 states and 8307 transitions. [2021-06-12 20:41:33,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 20:41:33,269 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:41:33,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:33,273 INFO L225 Difference]: With dead ends: 2476 [2021-06-12 20:41:33,273 INFO L226 Difference]: Without dead ends: 2436 [2021-06-12 20:41:33,273 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 1771.7ms TimeCoverageRelationStatistics Valid=639, Invalid=3393, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 20:41:33,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-06-12 20:41:33,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 1773. [2021-06-12 20:41:33,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1773 states, 1772 states have (on average 3.505079006772009) internal successors, (6211), 1772 states have internal predecessors, (6211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:33,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1773 states to 1773 states and 6211 transitions. [2021-06-12 20:41:33,295 INFO L78 Accepts]: Start accepts. Automaton has 1773 states and 6211 transitions. Word has length 24 [2021-06-12 20:41:33,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:33,295 INFO L482 AbstractCegarLoop]: Abstraction has 1773 states and 6211 transitions. [2021-06-12 20:41:33,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:33,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1773 states and 6211 transitions. [2021-06-12 20:41:33,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:41:33,297 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:33,297 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:33,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-06-12 20:41:33,498 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:41:33,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:33,498 INFO L82 PathProgramCache]: Analyzing trace with hash 885179680, now seen corresponding path program 87 times [2021-06-12 20:41:33,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:33,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240320001] [2021-06-12 20:41:33,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:33,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:33,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:33,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:33,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240320001] [2021-06-12 20:41:33,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240320001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:33,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616893123] [2021-06-12 20:41:33,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:33,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:41:33,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:33,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:41:33,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:33,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:41:33,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:33,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:33,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:33,766 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:41:33,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:33,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616893123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:33,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:33,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:41:33,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939629952] [2021-06-12 20:41:33,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:41:33,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:33,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:41:33,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:41:33,803 INFO L87 Difference]: Start difference. First operand 1773 states and 6211 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:35,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:35,186 INFO L93 Difference]: Finished difference Result 2331 states and 7931 transitions. [2021-06-12 20:41:35,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 20:41:35,187 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:41:35,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:35,190 INFO L225 Difference]: With dead ends: 2331 [2021-06-12 20:41:35,190 INFO L226 Difference]: Without dead ends: 2310 [2021-06-12 20:41:35,190 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1148.2ms TimeCoverageRelationStatistics Valid=439, Invalid=2213, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 20:41:35,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-06-12 20:41:35,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1760. [2021-06-12 20:41:35,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1759 states have (on average 3.505969300739056) internal successors, (6167), 1759 states have internal predecessors, (6167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:35,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 6167 transitions. [2021-06-12 20:41:35,211 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 6167 transitions. Word has length 24 [2021-06-12 20:41:35,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:35,211 INFO L482 AbstractCegarLoop]: Abstraction has 1760 states and 6167 transitions. [2021-06-12 20:41:35,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:35,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 6167 transitions. [2021-06-12 20:41:35,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:41:35,213 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:35,213 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:35,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2021-06-12 20:41:35,414 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:41:35,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:35,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1344157466, now seen corresponding path program 81 times [2021-06-12 20:41:35,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:35,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199822221] [2021-06-12 20:41:35,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:35,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:35,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:35,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:35,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199822221] [2021-06-12 20:41:35,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199822221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:35,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036329319] [2021-06-12 20:41:35,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:35,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:41:35,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:35,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 20:41:35,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:35,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:41:35,734 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:35,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-06-12 20:41:35,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:35,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:35,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:35,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:350 [2021-06-12 20:41:36,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:36,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036329319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:36,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:36,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:41:36,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818792503] [2021-06-12 20:41:36,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:41:36,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:36,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:41:36,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:41:36,070 INFO L87 Difference]: Start difference. First operand 1760 states and 6167 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:36,684 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 39 [2021-06-12 20:41:36,832 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 37 [2021-06-12 20:41:38,887 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2021-06-12 20:41:39,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:39,555 INFO L93 Difference]: Finished difference Result 3383 states and 11252 transitions. [2021-06-12 20:41:39,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 20:41:39,556 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:41:39,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:39,561 INFO L225 Difference]: With dead ends: 3383 [2021-06-12 20:41:39,561 INFO L226 Difference]: Without dead ends: 3356 [2021-06-12 20:41:39,561 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1996 ImplicationChecksByTransitivity, 3127.3ms TimeCoverageRelationStatistics Valid=1107, Invalid=5373, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 20:41:39,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2021-06-12 20:41:39,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 1826. [2021-06-12 20:41:39,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1826 states, 1825 states have (on average 3.530958904109589) internal successors, (6444), 1825 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:39,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 6444 transitions. [2021-06-12 20:41:39,590 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 6444 transitions. Word has length 24 [2021-06-12 20:41:39,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:39,590 INFO L482 AbstractCegarLoop]: Abstraction has 1826 states and 6444 transitions. [2021-06-12 20:41:39,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:39,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 6444 transitions. [2021-06-12 20:41:39,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:41:39,592 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:39,592 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:39,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:39,793 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:41:39,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:39,793 INFO L82 PathProgramCache]: Analyzing trace with hash -446703708, now seen corresponding path program 82 times [2021-06-12 20:41:39,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:39,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952647234] [2021-06-12 20:41:39,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:39,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:39,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:39,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:39,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952647234] [2021-06-12 20:41:39,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952647234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:39,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583281223] [2021-06-12 20:41:39,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:40,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:41:40,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:40,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:41:40,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:40,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:41:40,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:40,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:40,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:40,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:41:40,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:40,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583281223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:40,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:40,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:41:40,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178840530] [2021-06-12 20:41:40,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:41:40,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:40,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:41:40,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:41:40,322 INFO L87 Difference]: Start difference. First operand 1826 states and 6444 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:42,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:42,875 INFO L93 Difference]: Finished difference Result 3469 states and 11530 transitions. [2021-06-12 20:41:42,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-12 20:41:42,875 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:41:42,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:42,880 INFO L225 Difference]: With dead ends: 3469 [2021-06-12 20:41:42,880 INFO L226 Difference]: Without dead ends: 3411 [2021-06-12 20:41:42,881 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2250 ImplicationChecksByTransitivity, 2321.4ms TimeCoverageRelationStatistics Valid=1048, Invalid=5432, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 20:41:42,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2021-06-12 20:41:42,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 1859. [2021-06-12 20:41:42,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1858 states have (on average 3.5441334768568353) internal successors, (6585), 1858 states have internal predecessors, (6585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:42,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 6585 transitions. [2021-06-12 20:41:42,910 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 6585 transitions. Word has length 24 [2021-06-12 20:41:42,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:42,910 INFO L482 AbstractCegarLoop]: Abstraction has 1859 states and 6585 transitions. [2021-06-12 20:41:42,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:42,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 6585 transitions. [2021-06-12 20:41:42,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:41:42,912 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:42,912 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:43,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:43,113 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:41:43,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:43,113 INFO L82 PathProgramCache]: Analyzing trace with hash -713337392, now seen corresponding path program 88 times [2021-06-12 20:41:43,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:43,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825368421] [2021-06-12 20:41:43,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:43,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:43,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:43,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:43,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825368421] [2021-06-12 20:41:43,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825368421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:43,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489927875] [2021-06-12 20:41:43,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:43,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:41:43,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:43,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:41:43,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:43,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:41:43,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:43,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:43,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:43,393 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:41:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:43,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489927875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:43,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:43,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:41:43,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523334493] [2021-06-12 20:41:43,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:41:43,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:43,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:41:43,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:41:43,437 INFO L87 Difference]: Start difference. First operand 1859 states and 6585 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:45,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:45,567 INFO L93 Difference]: Finished difference Result 3517 states and 11694 transitions. [2021-06-12 20:41:45,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 20:41:45,567 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:41:45,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:45,572 INFO L225 Difference]: With dead ends: 3517 [2021-06-12 20:41:45,573 INFO L226 Difference]: Without dead ends: 3467 [2021-06-12 20:41:45,573 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 1747.2ms TimeCoverageRelationStatistics Valid=938, Invalid=4318, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 20:41:45,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3467 states. [2021-06-12 20:41:45,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3467 to 1918. [2021-06-12 20:41:45,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1918 states, 1917 states have (on average 3.5701617110067816) internal successors, (6844), 1917 states have internal predecessors, (6844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:45,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 6844 transitions. [2021-06-12 20:41:45,603 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 6844 transitions. Word has length 24 [2021-06-12 20:41:45,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:45,603 INFO L482 AbstractCegarLoop]: Abstraction has 1918 states and 6844 transitions. [2021-06-12 20:41:45,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:45,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 6844 transitions. [2021-06-12 20:41:45,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:41:45,605 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:45,605 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:45,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:45,805 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:41:45,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:45,806 INFO L82 PathProgramCache]: Analyzing trace with hash -389751214, now seen corresponding path program 89 times [2021-06-12 20:41:45,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:45,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620017138] [2021-06-12 20:41:45,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:45,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:45,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:45,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:45,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620017138] [2021-06-12 20:41:45,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620017138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:45,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533140474] [2021-06-12 20:41:45,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:45,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:41:45,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:45,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:41:45,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:46,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:41:46,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:46,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:46,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:46,075 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:41:46,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:46,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533140474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:46,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:46,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:41:46,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379683505] [2021-06-12 20:41:46,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:41:46,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:46,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:41:46,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:41:46,129 INFO L87 Difference]: Start difference. First operand 1918 states and 6844 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:48,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:48,072 INFO L93 Difference]: Finished difference Result 3345 states and 11284 transitions. [2021-06-12 20:41:48,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 20:41:48,072 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:41:48,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:48,077 INFO L225 Difference]: With dead ends: 3345 [2021-06-12 20:41:48,077 INFO L226 Difference]: Without dead ends: 3302 [2021-06-12 20:41:48,078 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 1590.8ms TimeCoverageRelationStatistics Valid=813, Invalid=3879, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 20:41:48,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3302 states. [2021-06-12 20:41:48,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3302 to 1924. [2021-06-12 20:41:48,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 3.578263130525221) internal successors, (6881), 1923 states have internal predecessors, (6881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:48,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 6881 transitions. [2021-06-12 20:41:48,115 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 6881 transitions. Word has length 24 [2021-06-12 20:41:48,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:48,116 INFO L482 AbstractCegarLoop]: Abstraction has 1924 states and 6881 transitions. [2021-06-12 20:41:48,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:48,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 6881 transitions. [2021-06-12 20:41:48,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:41:48,118 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:48,118 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:48,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable352 [2021-06-12 20:41:48,318 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:41:48,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:48,319 INFO L82 PathProgramCache]: Analyzing trace with hash 147171454, now seen corresponding path program 83 times [2021-06-12 20:41:48,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:48,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716125143] [2021-06-12 20:41:48,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:48,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:48,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:48,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716125143] [2021-06-12 20:41:48,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716125143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:48,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369859515] [2021-06-12 20:41:48,480 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:48,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:41:48,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:48,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:41:48,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:48,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:41:48,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:48,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:48,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:48,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:41:48,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:48,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369859515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:48,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:48,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:41:48,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615812812] [2021-06-12 20:41:48,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:41:48,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:48,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:41:48,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:41:48,660 INFO L87 Difference]: Start difference. First operand 1924 states and 6881 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:50,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:50,958 INFO L93 Difference]: Finished difference Result 3554 states and 12008 transitions. [2021-06-12 20:41:50,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 20:41:50,958 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:41:50,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:50,963 INFO L225 Difference]: With dead ends: 3554 [2021-06-12 20:41:50,964 INFO L226 Difference]: Without dead ends: 3506 [2021-06-12 20:41:50,964 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 1834.5ms TimeCoverageRelationStatistics Valid=855, Invalid=3975, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 20:41:50,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3506 states. [2021-06-12 20:41:50,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3506 to 1958. [2021-06-12 20:41:50,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1958 states, 1957 states have (on average 3.601430761369443) internal successors, (7048), 1957 states have internal predecessors, (7048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:50,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 7048 transitions. [2021-06-12 20:41:50,996 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 7048 transitions. Word has length 24 [2021-06-12 20:41:50,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:50,996 INFO L482 AbstractCegarLoop]: Abstraction has 1958 states and 7048 transitions. [2021-06-12 20:41:50,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:50,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 7048 transitions. [2021-06-12 20:41:50,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:41:50,998 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:50,998 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:51,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2021-06-12 20:41:51,198 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:41:51,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:51,199 INFO L82 PathProgramCache]: Analyzing trace with hash -57746680, now seen corresponding path program 90 times [2021-06-12 20:41:51,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:51,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445239283] [2021-06-12 20:41:51,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:51,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:51,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:51,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:51,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445239283] [2021-06-12 20:41:51,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445239283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:51,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683696477] [2021-06-12 20:41:51,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:51,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:41:51,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:51,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:41:51,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:51,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:51,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-12 20:41:51,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:51,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:51,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:51,510 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:27 [2021-06-12 20:41:51,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:51,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683696477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:51,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:51,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:41:51,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523170926] [2021-06-12 20:41:51,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:41:51,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:51,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:41:51,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:41:51,588 INFO L87 Difference]: Start difference. First operand 1958 states and 7048 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:54,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:54,401 INFO L93 Difference]: Finished difference Result 3437 states and 11640 transitions. [2021-06-12 20:41:54,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 20:41:54,401 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:41:54,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:54,407 INFO L225 Difference]: With dead ends: 3437 [2021-06-12 20:41:54,407 INFO L226 Difference]: Without dead ends: 3407 [2021-06-12 20:41:54,407 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1979 ImplicationChecksByTransitivity, 2372.6ms TimeCoverageRelationStatistics Valid=1021, Invalid=4831, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 20:41:54,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3407 states. [2021-06-12 20:41:54,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3407 to 1969. [2021-06-12 20:41:54,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.608739837398374) internal successors, (7102), 1968 states have internal predecessors, (7102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:54,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 7102 transitions. [2021-06-12 20:41:54,445 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 7102 transitions. Word has length 24 [2021-06-12 20:41:54,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:54,445 INFO L482 AbstractCegarLoop]: Abstraction has 1969 states and 7102 transitions. [2021-06-12 20:41:54,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:54,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 7102 transitions. [2021-06-12 20:41:54,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:41:54,447 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:54,447 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:54,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-06-12 20:41:54,648 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:41:54,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:54,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1627997442, now seen corresponding path program 91 times [2021-06-12 20:41:54,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:54,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19701047] [2021-06-12 20:41:54,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:54,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:54,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:54,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:54,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19701047] [2021-06-12 20:41:54,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19701047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:54,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324790155] [2021-06-12 20:41:54,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:54,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:54,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:41:54,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:54,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:41:54,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:54,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:54,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:54,932 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:41:54,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:54,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324790155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:54,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:54,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:41:54,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632207829] [2021-06-12 20:41:54,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:41:54,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:54,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:41:54,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:41:54,959 INFO L87 Difference]: Start difference. First operand 1969 states and 7102 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:56,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:56,789 INFO L93 Difference]: Finished difference Result 3267 states and 11097 transitions. [2021-06-12 20:41:56,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 20:41:56,789 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:41:56,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:56,794 INFO L225 Difference]: With dead ends: 3267 [2021-06-12 20:41:56,794 INFO L226 Difference]: Without dead ends: 3232 [2021-06-12 20:41:56,794 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 1453.0ms TimeCoverageRelationStatistics Valid=656, Invalid=3004, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 20:41:56,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2021-06-12 20:41:56,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 1969. [2021-06-12 20:41:56,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.608739837398374) internal successors, (7102), 1968 states have internal predecessors, (7102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:56,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 7102 transitions. [2021-06-12 20:41:56,823 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 7102 transitions. Word has length 24 [2021-06-12 20:41:56,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:56,823 INFO L482 AbstractCegarLoop]: Abstraction has 1969 states and 7102 transitions. [2021-06-12 20:41:56,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:56,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 7102 transitions. [2021-06-12 20:41:56,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:41:56,826 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:56,826 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:57,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-06-12 20:41:57,026 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:41:57,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:57,026 INFO L82 PathProgramCache]: Analyzing trace with hash -634589398, now seen corresponding path program 92 times [2021-06-12 20:41:57,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:57,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320377161] [2021-06-12 20:41:57,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:57,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:57,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:57,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320377161] [2021-06-12 20:41:57,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320377161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:57,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083690543] [2021-06-12 20:41:57,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:57,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:41:57,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:57,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:41:57,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:57,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:41:57,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:41:57,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:41:57,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:57,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:57,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:57,423 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 20:41:57,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:57,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083690543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:57,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:57,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:41:57,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025204734] [2021-06-12 20:41:57,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:41:57,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:57,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:41:57,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:41:57,452 INFO L87 Difference]: Start difference. First operand 1969 states and 7102 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:58,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:58,285 INFO L93 Difference]: Finished difference Result 2469 states and 8641 transitions. [2021-06-12 20:41:58,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:41:58,286 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:41:58,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:58,289 INFO L225 Difference]: With dead ends: 2469 [2021-06-12 20:41:58,289 INFO L226 Difference]: Without dead ends: 2460 [2021-06-12 20:41:58,289 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 733.9ms TimeCoverageRelationStatistics Valid=248, Invalid=1474, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:41:58,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2021-06-12 20:41:58,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 1973. [2021-06-12 20:41:58,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1973 states, 1972 states have (on average 3.6080121703853956) internal successors, (7115), 1972 states have internal predecessors, (7115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:58,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 7115 transitions. [2021-06-12 20:41:58,314 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 7115 transitions. Word has length 24 [2021-06-12 20:41:58,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:58,314 INFO L482 AbstractCegarLoop]: Abstraction has 1973 states and 7115 transitions. [2021-06-12 20:41:58,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:58,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 7115 transitions. [2021-06-12 20:41:58,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:41:58,317 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:58,317 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:41:58,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:58,519 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:41:58,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:41:58,519 INFO L82 PathProgramCache]: Analyzing trace with hash -844126778, now seen corresponding path program 93 times [2021-06-12 20:41:58,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:41:58,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216053994] [2021-06-12 20:41:58,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:41:58,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:41:58,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:58,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:41:58,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216053994] [2021-06-12 20:41:58,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216053994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:58,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753014694] [2021-06-12 20:41:58,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:41:58,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:41:58,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:41:58,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:41:58,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:41:58,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:41:58,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:41:58,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:41:58,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:41:58,900 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:41:58,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:41:58,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753014694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:41:58,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:41:58,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:41:58,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386697030] [2021-06-12 20:41:58,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:41:58,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:41:58,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:41:58,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:41:58,926 INFO L87 Difference]: Start difference. First operand 1973 states and 7115 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:59,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:41:59,955 INFO L93 Difference]: Finished difference Result 2516 states and 8793 transitions. [2021-06-12 20:41:59,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:41:59,955 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:41:59,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:41:59,959 INFO L225 Difference]: With dead ends: 2516 [2021-06-12 20:41:59,959 INFO L226 Difference]: Without dead ends: 2497 [2021-06-12 20:41:59,959 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 879.5ms TimeCoverageRelationStatistics Valid=289, Invalid=1603, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:41:59,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-06-12 20:41:59,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1976. [2021-06-12 20:41:59,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1976 states, 1975 states have (on average 3.607594936708861) internal successors, (7125), 1975 states have internal predecessors, (7125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:59,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1976 states to 1976 states and 7125 transitions. [2021-06-12 20:41:59,984 INFO L78 Accepts]: Start accepts. Automaton has 1976 states and 7125 transitions. Word has length 24 [2021-06-12 20:41:59,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:41:59,984 INFO L482 AbstractCegarLoop]: Abstraction has 1976 states and 7125 transitions. [2021-06-12 20:41:59,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:41:59,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1976 states and 7125 transitions. [2021-06-12 20:41:59,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:41:59,986 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:41:59,986 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:00,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-06-12 20:42:00,187 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:00,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:00,187 INFO L82 PathProgramCache]: Analyzing trace with hash 884544968, now seen corresponding path program 94 times [2021-06-12 20:42:00,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:00,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556098809] [2021-06-12 20:42:00,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:00,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:00,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:00,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556098809] [2021-06-12 20:42:00,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556098809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:00,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379668204] [2021-06-12 20:42:00,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:00,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:42:00,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:00,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:00,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:00,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:42:00,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:00,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:00,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:00,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-12 20:42:00,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:00,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379668204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:00,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:00,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:42:00,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766903310] [2021-06-12 20:42:00,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:42:00,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:00,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:42:00,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:42:00,553 INFO L87 Difference]: Start difference. First operand 1976 states and 7125 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:01,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:01,494 INFO L93 Difference]: Finished difference Result 2478 states and 8683 transitions. [2021-06-12 20:42:01,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:42:01,494 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:01,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:01,498 INFO L225 Difference]: With dead ends: 2478 [2021-06-12 20:42:01,498 INFO L226 Difference]: Without dead ends: 2459 [2021-06-12 20:42:01,498 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 813.7ms TimeCoverageRelationStatistics Valid=282, Invalid=1524, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:42:01,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2021-06-12 20:42:01,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 1979. [2021-06-12 20:42:01,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1979 states, 1978 states have (on average 3.6071789686552074) internal successors, (7135), 1978 states have internal predecessors, (7135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:01,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1979 states to 1979 states and 7135 transitions. [2021-06-12 20:42:01,523 INFO L78 Accepts]: Start accepts. Automaton has 1979 states and 7135 transitions. Word has length 24 [2021-06-12 20:42:01,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:01,523 INFO L482 AbstractCegarLoop]: Abstraction has 1979 states and 7135 transitions. [2021-06-12 20:42:01,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:01,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1979 states and 7135 transitions. [2021-06-12 20:42:01,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:01,525 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:01,525 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:01,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:01,726 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:01,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:01,726 INFO L82 PathProgramCache]: Analyzing trace with hash -143604892, now seen corresponding path program 95 times [2021-06-12 20:42:01,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:01,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860052776] [2021-06-12 20:42:01,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:01,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:01,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:01,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:01,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860052776] [2021-06-12 20:42:01,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860052776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:01,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297346228] [2021-06-12 20:42:01,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:01,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:42:01,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:01,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:01,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:02,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:42:02,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:02,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:02,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:02,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:42:02,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:02,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297346228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:02,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:02,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:42:02,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052005179] [2021-06-12 20:42:02,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:42:02,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:02,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:42:02,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:42:02,063 INFO L87 Difference]: Start difference. First operand 1979 states and 7135 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:02,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:02,764 INFO L93 Difference]: Finished difference Result 2450 states and 8602 transitions. [2021-06-12 20:42:02,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:42:02,765 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:02,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:02,768 INFO L225 Difference]: With dead ends: 2450 [2021-06-12 20:42:02,768 INFO L226 Difference]: Without dead ends: 2441 [2021-06-12 20:42:02,768 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 637.0ms TimeCoverageRelationStatistics Valid=247, Invalid=1159, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:42:02,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2441 states. [2021-06-12 20:42:02,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2441 to 1982. [2021-06-12 20:42:02,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1981 states have (on average 3.606764260474508) internal successors, (7145), 1981 states have internal predecessors, (7145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:02,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 7145 transitions. [2021-06-12 20:42:02,791 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 7145 transitions. Word has length 24 [2021-06-12 20:42:02,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:02,792 INFO L482 AbstractCegarLoop]: Abstraction has 1982 states and 7145 transitions. [2021-06-12 20:42:02,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:02,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 7145 transitions. [2021-06-12 20:42:02,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:02,794 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:02,794 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:02,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:02,994 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:02,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:02,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1865725408, now seen corresponding path program 96 times [2021-06-12 20:42:02,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:02,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772516815] [2021-06-12 20:42:02,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:03,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:03,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:03,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772516815] [2021-06-12 20:42:03,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772516815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:03,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348457283] [2021-06-12 20:42:03,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:03,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:42:03,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:03,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 20:42:03,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:03,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:42:03,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:42:03,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:03,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 49 [2021-06-12 20:42:03,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:03,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:03,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:42:03,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:118 [2021-06-12 20:42:03,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:03,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348457283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:03,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:03,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-12 20:42:03,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687368192] [2021-06-12 20:42:03,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:42:03,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:03,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:42:03,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:42:03,454 INFO L87 Difference]: Start difference. First operand 1982 states and 7145 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:04,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:04,495 INFO L93 Difference]: Finished difference Result 2366 states and 8334 transitions. [2021-06-12 20:42:04,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:42:04,495 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:04,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:04,499 INFO L225 Difference]: With dead ends: 2366 [2021-06-12 20:42:04,499 INFO L226 Difference]: Without dead ends: 2353 [2021-06-12 20:42:04,499 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 914.0ms TimeCoverageRelationStatistics Valid=300, Invalid=1592, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:42:04,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2021-06-12 20:42:04,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 1974. [2021-06-12 20:42:04,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 3.6097313735428282) internal successors, (7122), 1973 states have internal predecessors, (7122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:04,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 7122 transitions. [2021-06-12 20:42:04,524 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 7122 transitions. Word has length 24 [2021-06-12 20:42:04,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:04,524 INFO L482 AbstractCegarLoop]: Abstraction has 1974 states and 7122 transitions. [2021-06-12 20:42:04,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:04,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 7122 transitions. [2021-06-12 20:42:04,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:04,526 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:04,526 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:04,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:04,727 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:04,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:04,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1334997500, now seen corresponding path program 97 times [2021-06-12 20:42:04,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:04,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835137007] [2021-06-12 20:42:04,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:04,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:04,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:04,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:04,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835137007] [2021-06-12 20:42:04,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835137007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:04,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644027311] [2021-06-12 20:42:04,886 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:04,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:04,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:04,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:05,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:42:05,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:05,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:05,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:05,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:42:05,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:05,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644027311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:05,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:05,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:42:05,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079823657] [2021-06-12 20:42:05,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:42:05,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:05,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:42:05,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:42:05,074 INFO L87 Difference]: Start difference. First operand 1974 states and 7122 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:05,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:05,745 INFO L93 Difference]: Finished difference Result 2438 states and 8561 transitions. [2021-06-12 20:42:05,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:42:05,745 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:05,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:05,749 INFO L225 Difference]: With dead ends: 2438 [2021-06-12 20:42:05,749 INFO L226 Difference]: Without dead ends: 2429 [2021-06-12 20:42:05,749 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 634.9ms TimeCoverageRelationStatistics Valid=225, Invalid=1107, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:42:05,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2021-06-12 20:42:05,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 1963. [2021-06-12 20:42:05,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 3.610091743119266) internal successors, (7083), 1962 states have internal predecessors, (7083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:05,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 7083 transitions. [2021-06-12 20:42:05,781 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 7083 transitions. Word has length 24 [2021-06-12 20:42:05,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:05,781 INFO L482 AbstractCegarLoop]: Abstraction has 1963 states and 7083 transitions. [2021-06-12 20:42:05,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:05,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 7083 transitions. [2021-06-12 20:42:05,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:05,784 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:05,784 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:05,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:05,984 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:05,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:05,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1948206298, now seen corresponding path program 98 times [2021-06-12 20:42:05,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:05,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368308746] [2021-06-12 20:42:05,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:05,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:06,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:06,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:06,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368308746] [2021-06-12 20:42:06,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368308746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:06,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520176269] [2021-06-12 20:42:06,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:06,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:42:06,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:06,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:42:06,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:06,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:42:06,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:42:06,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:42:06,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:06,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:06,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:06,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 20:42:06,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:06,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520176269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:06,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:06,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:42:06,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996386411] [2021-06-12 20:42:06,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:42:06,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:06,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:42:06,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:42:06,434 INFO L87 Difference]: Start difference. First operand 1963 states and 7083 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:07,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:07,270 INFO L93 Difference]: Finished difference Result 2495 states and 8710 transitions. [2021-06-12 20:42:07,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:42:07,270 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:07,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:07,274 INFO L225 Difference]: With dead ends: 2495 [2021-06-12 20:42:07,274 INFO L226 Difference]: Without dead ends: 2486 [2021-06-12 20:42:07,274 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 718.0ms TimeCoverageRelationStatistics Valid=234, Invalid=1326, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:42:07,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2021-06-12 20:42:07,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 1963. [2021-06-12 20:42:07,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 3.610091743119266) internal successors, (7083), 1962 states have internal predecessors, (7083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:07,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 7083 transitions. [2021-06-12 20:42:07,300 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 7083 transitions. Word has length 24 [2021-06-12 20:42:07,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:07,300 INFO L482 AbstractCegarLoop]: Abstraction has 1963 states and 7083 transitions. [2021-06-12 20:42:07,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:07,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 7083 transitions. [2021-06-12 20:42:07,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:07,303 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:07,303 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:07,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:07,503 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:07,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:07,503 INFO L82 PathProgramCache]: Analyzing trace with hash 440124240, now seen corresponding path program 99 times [2021-06-12 20:42:07,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:07,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318823757] [2021-06-12 20:42:07,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:07,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:07,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:07,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:07,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318823757] [2021-06-12 20:42:07,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318823757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:07,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652488546] [2021-06-12 20:42:07,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:07,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:42:07,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:07,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:42:07,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:07,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:42:07,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:42:07,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:42:07,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:07,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:07,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:07,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 20:42:07,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:07,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652488546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:07,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:07,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:42:07,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990128958] [2021-06-12 20:42:07,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:42:07,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:07,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:42:07,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:42:07,964 INFO L87 Difference]: Start difference. First operand 1963 states and 7083 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:08,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:08,817 INFO L93 Difference]: Finished difference Result 2517 states and 8781 transitions. [2021-06-12 20:42:08,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:42:08,818 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:08,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:08,821 INFO L225 Difference]: With dead ends: 2517 [2021-06-12 20:42:08,821 INFO L226 Difference]: Without dead ends: 2507 [2021-06-12 20:42:08,822 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 714.8ms TimeCoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:42:08,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2021-06-12 20:42:08,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 1967. [2021-06-12 20:42:08,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1966 states have (on average 3.608850457782299) internal successors, (7095), 1966 states have internal predecessors, (7095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:08,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 7095 transitions. [2021-06-12 20:42:08,858 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 7095 transitions. Word has length 24 [2021-06-12 20:42:08,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:08,858 INFO L482 AbstractCegarLoop]: Abstraction has 1967 states and 7095 transitions. [2021-06-12 20:42:08,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:08,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 7095 transitions. [2021-06-12 20:42:08,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:08,860 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:08,860 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:09,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:09,061 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:09,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:09,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1918599544, now seen corresponding path program 100 times [2021-06-12 20:42:09,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:09,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350042698] [2021-06-12 20:42:09,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:09,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:09,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:09,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350042698] [2021-06-12 20:42:09,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350042698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:09,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274520753] [2021-06-12 20:42:09,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:09,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:42:09,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:09,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:09,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:09,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:42:09,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:09,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:09,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:09,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:42:09,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:09,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274520753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:09,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:09,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:42:09,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609550733] [2021-06-12 20:42:09,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:42:09,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:09,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:42:09,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:42:09,476 INFO L87 Difference]: Start difference. First operand 1967 states and 7095 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:10,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:10,330 INFO L93 Difference]: Finished difference Result 2507 states and 8780 transitions. [2021-06-12 20:42:10,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:42:10,330 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:10,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:10,334 INFO L225 Difference]: With dead ends: 2507 [2021-06-12 20:42:10,334 INFO L226 Difference]: Without dead ends: 2497 [2021-06-12 20:42:10,334 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 782.1ms TimeCoverageRelationStatistics Valid=249, Invalid=1311, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:42:10,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-06-12 20:42:10,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1966. [2021-06-12 20:42:10,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1966 states, 1965 states have (on average 3.6106870229007635) internal successors, (7095), 1965 states have internal predecessors, (7095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:10,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1966 states to 1966 states and 7095 transitions. [2021-06-12 20:42:10,358 INFO L78 Accepts]: Start accepts. Automaton has 1966 states and 7095 transitions. Word has length 24 [2021-06-12 20:42:10,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:10,358 INFO L482 AbstractCegarLoop]: Abstraction has 1966 states and 7095 transitions. [2021-06-12 20:42:10,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:10,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1966 states and 7095 transitions. [2021-06-12 20:42:10,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:10,361 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:10,361 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:10,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable374 [2021-06-12 20:42:10,576 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:10,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:10,577 INFO L82 PathProgramCache]: Analyzing trace with hash -2095140976, now seen corresponding path program 101 times [2021-06-12 20:42:10,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:10,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831496960] [2021-06-12 20:42:10,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:10,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:10,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:10,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:10,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831496960] [2021-06-12 20:42:10,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831496960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:10,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223799876] [2021-06-12 20:42:10,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:10,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:42:10,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:10,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:10,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:10,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:42:10,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:10,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:10,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:10,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:42:10,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:10,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223799876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:10,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:10,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:42:10,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044849270] [2021-06-12 20:42:10,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:42:10,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:10,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:42:10,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:42:10,952 INFO L87 Difference]: Start difference. First operand 1966 states and 7095 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:11,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:11,840 INFO L93 Difference]: Finished difference Result 2493 states and 8734 transitions. [2021-06-12 20:42:11,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:42:11,841 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:11,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:11,844 INFO L225 Difference]: With dead ends: 2493 [2021-06-12 20:42:11,844 INFO L226 Difference]: Without dead ends: 2484 [2021-06-12 20:42:11,844 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 763.7ms TimeCoverageRelationStatistics Valid=286, Invalid=1520, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:42:11,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2021-06-12 20:42:11,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 1969. [2021-06-12 20:42:11,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.609247967479675) internal successors, (7103), 1968 states have internal predecessors, (7103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:11,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 7103 transitions. [2021-06-12 20:42:11,869 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 7103 transitions. Word has length 24 [2021-06-12 20:42:11,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:11,870 INFO L482 AbstractCegarLoop]: Abstraction has 1969 states and 7103 transitions. [2021-06-12 20:42:11,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:11,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 7103 transitions. [2021-06-12 20:42:11,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:11,872 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:11,872 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:12,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-12 20:42:12,072 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:12,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:12,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1366087880, now seen corresponding path program 102 times [2021-06-12 20:42:12,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:12,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219913933] [2021-06-12 20:42:12,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:12,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:12,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:12,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:12,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219913933] [2021-06-12 20:42:12,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219913933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:12,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765631861] [2021-06-12 20:42:12,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:12,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:42:12,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:12,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:42:12,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:12,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:12,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:42:12,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:12,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:12,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:12,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:42:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:12,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765631861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:12,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:12,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:42:12,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823182454] [2021-06-12 20:42:12,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:42:12,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:12,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:42:12,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:42:12,475 INFO L87 Difference]: Start difference. First operand 1969 states and 7103 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:13,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:13,692 INFO L93 Difference]: Finished difference Result 2601 states and 8996 transitions. [2021-06-12 20:42:13,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:42:13,692 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:13,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:13,696 INFO L225 Difference]: With dead ends: 2601 [2021-06-12 20:42:13,696 INFO L226 Difference]: Without dead ends: 2582 [2021-06-12 20:42:13,696 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1093.5ms TimeCoverageRelationStatistics Valid=378, Invalid=1974, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 20:42:13,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2582 states. [2021-06-12 20:42:13,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2582 to 1974. [2021-06-12 20:42:13,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 3.6117587430309173) internal successors, (7126), 1973 states have internal predecessors, (7126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:13,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 7126 transitions. [2021-06-12 20:42:13,721 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 7126 transitions. Word has length 24 [2021-06-12 20:42:13,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:13,721 INFO L482 AbstractCegarLoop]: Abstraction has 1974 states and 7126 transitions. [2021-06-12 20:42:13,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:13,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 7126 transitions. [2021-06-12 20:42:13,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:13,723 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:13,723 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:13,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-12 20:42:13,924 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:13,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:13,924 INFO L82 PathProgramCache]: Analyzing trace with hash -2147045616, now seen corresponding path program 103 times [2021-06-12 20:42:13,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:13,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575893249] [2021-06-12 20:42:13,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:13,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:14,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:14,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:14,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575893249] [2021-06-12 20:42:14,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575893249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:14,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154850649] [2021-06-12 20:42:14,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:14,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:14,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:14,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:14,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:42:14,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:14,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:14,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:14,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:42:14,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:14,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154850649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:14,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:14,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:42:14,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375860650] [2021-06-12 20:42:14,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:42:14,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:14,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:42:14,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:42:14,265 INFO L87 Difference]: Start difference. First operand 1974 states and 7126 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:15,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:15,017 INFO L93 Difference]: Finished difference Result 2447 states and 8580 transitions. [2021-06-12 20:42:15,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:42:15,018 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:15,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:15,021 INFO L225 Difference]: With dead ends: 2447 [2021-06-12 20:42:15,021 INFO L226 Difference]: Without dead ends: 2437 [2021-06-12 20:42:15,021 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 706.1ms TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:42:15,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2437 states. [2021-06-12 20:42:15,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2437 to 1970. [2021-06-12 20:42:15,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1970 states, 1969 states have (on average 3.612493651599797) internal successors, (7113), 1969 states have internal predecessors, (7113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:15,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1970 states to 1970 states and 7113 transitions. [2021-06-12 20:42:15,045 INFO L78 Accepts]: Start accepts. Automaton has 1970 states and 7113 transitions. Word has length 24 [2021-06-12 20:42:15,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:15,045 INFO L482 AbstractCegarLoop]: Abstraction has 1970 states and 7113 transitions. [2021-06-12 20:42:15,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:15,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1970 states and 7113 transitions. [2021-06-12 20:42:15,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:15,048 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:15,048 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:15,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2021-06-12 20:42:15,248 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:15,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:15,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1479020142, now seen corresponding path program 104 times [2021-06-12 20:42:15,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:15,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559808831] [2021-06-12 20:42:15,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:15,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:15,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:15,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559808831] [2021-06-12 20:42:15,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559808831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:15,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729868500] [2021-06-12 20:42:15,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:15,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:42:15,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:15,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:42:15,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:15,612 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:15,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-12 20:42:15,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:15,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:15,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:15,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-12 20:42:15,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:15,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729868500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:15,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:15,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:42:15,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526814024] [2021-06-12 20:42:15,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:42:15,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:15,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:42:15,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:42:15,680 INFO L87 Difference]: Start difference. First operand 1970 states and 7113 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:17,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:17,129 INFO L93 Difference]: Finished difference Result 2518 states and 8787 transitions. [2021-06-12 20:42:17,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:42:17,129 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:17,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:17,133 INFO L225 Difference]: With dead ends: 2518 [2021-06-12 20:42:17,133 INFO L226 Difference]: Without dead ends: 2499 [2021-06-12 20:42:17,133 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1304.9ms TimeCoverageRelationStatistics Valid=434, Invalid=2116, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:42:17,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2499 states. [2021-06-12 20:42:17,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2499 to 1974. [2021-06-12 20:42:17,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 3.6122655854029397) internal successors, (7127), 1973 states have internal predecessors, (7127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:17,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 7127 transitions. [2021-06-12 20:42:17,165 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 7127 transitions. Word has length 24 [2021-06-12 20:42:17,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:17,165 INFO L482 AbstractCegarLoop]: Abstraction has 1974 states and 7127 transitions. [2021-06-12 20:42:17,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:17,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 7127 transitions. [2021-06-12 20:42:17,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:17,167 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:17,168 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:17,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:17,369 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:17,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:17,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1787797294, now seen corresponding path program 105 times [2021-06-12 20:42:17,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:17,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186436913] [2021-06-12 20:42:17,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:17,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:17,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:17,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:17,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186436913] [2021-06-12 20:42:17,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186436913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:17,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411138914] [2021-06-12 20:42:17,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:17,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:42:17,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:17,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:42:17,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:17,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:17,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:42:17,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:17,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:17,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:17,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:42:17,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:17,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411138914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:17,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:17,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:42:17,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273524907] [2021-06-12 20:42:17,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:42:17,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:17,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:42:17,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:42:17,756 INFO L87 Difference]: Start difference. First operand 1974 states and 7127 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:18,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:18,860 INFO L93 Difference]: Finished difference Result 2444 states and 8570 transitions. [2021-06-12 20:42:18,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:42:18,861 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:18,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:18,864 INFO L225 Difference]: With dead ends: 2444 [2021-06-12 20:42:18,864 INFO L226 Difference]: Without dead ends: 2425 [2021-06-12 20:42:18,865 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 991.3ms TimeCoverageRelationStatistics Valid=384, Invalid=1686, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:42:18,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2021-06-12 20:42:18,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1979. [2021-06-12 20:42:18,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1979 states, 1978 states have (on average 3.6122345803842264) internal successors, (7145), 1978 states have internal predecessors, (7145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:18,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1979 states to 1979 states and 7145 transitions. [2021-06-12 20:42:18,890 INFO L78 Accepts]: Start accepts. Automaton has 1979 states and 7145 transitions. Word has length 24 [2021-06-12 20:42:18,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:18,890 INFO L482 AbstractCegarLoop]: Abstraction has 1979 states and 7145 transitions. [2021-06-12 20:42:18,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:18,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1979 states and 7145 transitions. [2021-06-12 20:42:18,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:18,893 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:18,893 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:19,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:19,093 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:19,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:19,093 INFO L82 PathProgramCache]: Analyzing trace with hash 2111383472, now seen corresponding path program 106 times [2021-06-12 20:42:19,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:19,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594826758] [2021-06-12 20:42:19,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:19,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:19,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:19,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594826758] [2021-06-12 20:42:19,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594826758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:19,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259284680] [2021-06-12 20:42:19,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:19,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:42:19,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:19,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:19,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:19,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:42:19,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:19,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:19,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:19,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:42:19,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:19,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259284680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:19,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:19,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:42:19,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598916300] [2021-06-12 20:42:19,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:42:19,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:19,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:42:19,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:42:19,431 INFO L87 Difference]: Start difference. First operand 1979 states and 7145 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:20,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:20,096 INFO L93 Difference]: Finished difference Result 2401 states and 8472 transitions. [2021-06-12 20:42:20,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:42:20,096 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:20,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:20,099 INFO L225 Difference]: With dead ends: 2401 [2021-06-12 20:42:20,099 INFO L226 Difference]: Without dead ends: 2388 [2021-06-12 20:42:20,099 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 634.9ms TimeCoverageRelationStatistics Valid=231, Invalid=1101, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:42:20,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2388 states. [2021-06-12 20:42:20,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2388 to 1974. [2021-06-12 20:42:20,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 3.6122655854029397) internal successors, (7127), 1973 states have internal predecessors, (7127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:20,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 7127 transitions. [2021-06-12 20:42:20,131 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 7127 transitions. Word has length 24 [2021-06-12 20:42:20,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:20,131 INFO L482 AbstractCegarLoop]: Abstraction has 1974 states and 7127 transitions. [2021-06-12 20:42:20,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:20,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 7127 transitions. [2021-06-12 20:42:20,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:20,134 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:20,134 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:20,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable386,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:20,334 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:20,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:20,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1365890042, now seen corresponding path program 107 times [2021-06-12 20:42:20,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:20,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032033220] [2021-06-12 20:42:20,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:20,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:20,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:20,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:20,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032033220] [2021-06-12 20:42:20,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032033220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:20,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219214082] [2021-06-12 20:42:20,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:20,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:42:20,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:20,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:20,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:20,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:42:20,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:20,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:20,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:20,681 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:42:20,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:20,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219214082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:20,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:20,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:42:20,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634162579] [2021-06-12 20:42:20,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:42:20,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:20,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:42:20,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:42:20,708 INFO L87 Difference]: Start difference. First operand 1974 states and 7127 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:21,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:21,695 INFO L93 Difference]: Finished difference Result 2538 states and 8840 transitions. [2021-06-12 20:42:21,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:42:21,695 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:21,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:21,699 INFO L225 Difference]: With dead ends: 2538 [2021-06-12 20:42:21,699 INFO L226 Difference]: Without dead ends: 2519 [2021-06-12 20:42:21,699 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 846.3ms TimeCoverageRelationStatistics Valid=277, Invalid=1529, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:42:21,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2519 states. [2021-06-12 20:42:21,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2519 to 1974. [2021-06-12 20:42:21,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 3.6122655854029397) internal successors, (7127), 1973 states have internal predecessors, (7127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:21,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 7127 transitions. [2021-06-12 20:42:21,724 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 7127 transitions. Word has length 24 [2021-06-12 20:42:21,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:21,724 INFO L482 AbstractCegarLoop]: Abstraction has 1974 states and 7127 transitions. [2021-06-12 20:42:21,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:21,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 7127 transitions. [2021-06-12 20:42:21,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:21,727 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:21,727 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:21,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-06-12 20:42:21,927 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:21,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:21,927 INFO L82 PathProgramCache]: Analyzing trace with hash 109929152, now seen corresponding path program 108 times [2021-06-12 20:42:21,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:21,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452109408] [2021-06-12 20:42:21,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:22,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:22,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:22,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452109408] [2021-06-12 20:42:22,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452109408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:22,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767319127] [2021-06-12 20:42:22,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:22,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:42:22,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:22,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 20:42:22,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:22,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:42:22,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:22,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:22,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:22,320 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:15 [2021-06-12 20:42:22,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:22,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767319127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:22,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:22,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:42:22,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95131975] [2021-06-12 20:42:22,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:42:22,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:22,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:42:22,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:42:22,369 INFO L87 Difference]: Start difference. First operand 1974 states and 7127 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:22,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:22,877 INFO L93 Difference]: Finished difference Result 2514 states and 8723 transitions. [2021-06-12 20:42:22,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:42:22,877 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:22,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:22,880 INFO L225 Difference]: With dead ends: 2514 [2021-06-12 20:42:22,880 INFO L226 Difference]: Without dead ends: 2456 [2021-06-12 20:42:22,881 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 518.6ms TimeCoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:42:22,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2021-06-12 20:42:22,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 1983. [2021-06-12 20:42:22,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1982 states have (on average 3.608980827447023) internal successors, (7153), 1982 states have internal predecessors, (7153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:22,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 7153 transitions. [2021-06-12 20:42:22,904 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 7153 transitions. Word has length 24 [2021-06-12 20:42:22,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:22,904 INFO L482 AbstractCegarLoop]: Abstraction has 1983 states and 7153 transitions. [2021-06-12 20:42:22,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:22,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 7153 transitions. [2021-06-12 20:42:22,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:22,907 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:22,907 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:23,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-12 20:42:23,107 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:23,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:23,108 INFO L82 PathProgramCache]: Analyzing trace with hash 79584234, now seen corresponding path program 109 times [2021-06-12 20:42:23,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:23,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137862628] [2021-06-12 20:42:23,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:23,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:23,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:23,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:23,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137862628] [2021-06-12 20:42:23,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137862628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:23,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669947234] [2021-06-12 20:42:23,298 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:23,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:23,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:23,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:42:23,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:23,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:23,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:23,467 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:42:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:23,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669947234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:23,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:23,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:42:23,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671061300] [2021-06-12 20:42:23,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:42:23,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:23,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:42:23,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:42:23,494 INFO L87 Difference]: Start difference. First operand 1983 states and 7153 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:24,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:24,310 INFO L93 Difference]: Finished difference Result 2509 states and 8769 transitions. [2021-06-12 20:42:24,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:42:24,310 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:24,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:24,314 INFO L225 Difference]: With dead ends: 2509 [2021-06-12 20:42:24,314 INFO L226 Difference]: Without dead ends: 2499 [2021-06-12 20:42:24,314 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 757.5ms TimeCoverageRelationStatistics Valid=252, Invalid=1388, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:42:24,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2499 states. [2021-06-12 20:42:24,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2499 to 1984. [2021-06-12 20:42:24,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1984 states, 1983 states have (on average 3.6091780131114475) internal successors, (7157), 1983 states have internal predecessors, (7157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:24,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 7157 transitions. [2021-06-12 20:42:24,339 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 7157 transitions. Word has length 24 [2021-06-12 20:42:24,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:24,339 INFO L482 AbstractCegarLoop]: Abstraction has 1984 states and 7157 transitions. [2021-06-12 20:42:24,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:24,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 7157 transitions. [2021-06-12 20:42:24,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:24,341 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:24,341 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:24,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-12 20:42:24,542 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:24,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:24,542 INFO L82 PathProgramCache]: Analyzing trace with hash -96957198, now seen corresponding path program 110 times [2021-06-12 20:42:24,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:24,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675189873] [2021-06-12 20:42:24,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:24,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:24,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:24,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:24,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675189873] [2021-06-12 20:42:24,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675189873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:24,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652372077] [2021-06-12 20:42:24,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:24,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:42:24,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:24,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:42:24,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:24,848 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:24,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:42:24,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:24,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:24,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:24,858 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:42:24,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:24,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652372077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:24,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:24,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:42:24,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289269345] [2021-06-12 20:42:24,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:42:24,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:24,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:42:24,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:42:24,943 INFO L87 Difference]: Start difference. First operand 1984 states and 7157 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:26,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:26,419 INFO L93 Difference]: Finished difference Result 2588 states and 8993 transitions. [2021-06-12 20:42:26,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 20:42:26,419 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:26,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:26,423 INFO L225 Difference]: With dead ends: 2588 [2021-06-12 20:42:26,423 INFO L226 Difference]: Without dead ends: 2569 [2021-06-12 20:42:26,423 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 1359.4ms TimeCoverageRelationStatistics Valid=508, Invalid=2462, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 20:42:26,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2021-06-12 20:42:26,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 1988. [2021-06-12 20:42:26,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 3.610468042274786) internal successors, (7174), 1987 states have internal predecessors, (7174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:26,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 7174 transitions. [2021-06-12 20:42:26,449 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 7174 transitions. Word has length 24 [2021-06-12 20:42:26,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:26,449 INFO L482 AbstractCegarLoop]: Abstraction has 1988 states and 7174 transitions. [2021-06-12 20:42:26,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:26,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 7174 transitions. [2021-06-12 20:42:26,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:26,451 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:26,451 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:26,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable390 [2021-06-12 20:42:26,652 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:26,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:26,652 INFO L82 PathProgramCache]: Analyzing trace with hash -930695638, now seen corresponding path program 111 times [2021-06-12 20:42:26,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:26,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826891042] [2021-06-12 20:42:26,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:26,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:26,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:26,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826891042] [2021-06-12 20:42:26,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826891042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:26,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785804321] [2021-06-12 20:42:26,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:26,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:42:26,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:26,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:26,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:26,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:42:26,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:26,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:26,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:26,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:42:26,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:26,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785804321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:26,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:26,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:42:26,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006941716] [2021-06-12 20:42:26,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:42:26,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:26,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:42:26,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:42:26,989 INFO L87 Difference]: Start difference. First operand 1988 states and 7174 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:27,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:27,785 INFO L93 Difference]: Finished difference Result 2469 states and 8651 transitions. [2021-06-12 20:42:27,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:42:27,786 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:27,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:27,789 INFO L225 Difference]: With dead ends: 2469 [2021-06-12 20:42:27,789 INFO L226 Difference]: Without dead ends: 2459 [2021-06-12 20:42:27,789 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 723.9ms TimeCoverageRelationStatistics Valid=260, Invalid=1462, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:42:27,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2021-06-12 20:42:27,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 1987. [2021-06-12 20:42:27,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1987 states, 1986 states have (on average 3.610271903323263) internal successors, (7170), 1986 states have internal predecessors, (7170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:27,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 7170 transitions. [2021-06-12 20:42:27,813 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 7170 transitions. Word has length 24 [2021-06-12 20:42:27,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:27,813 INFO L482 AbstractCegarLoop]: Abstraction has 1987 states and 7170 transitions. [2021-06-12 20:42:27,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:27,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 7170 transitions. [2021-06-12 20:42:27,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:27,816 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:27,816 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:28,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:28,016 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:28,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:28,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1762867562, now seen corresponding path program 112 times [2021-06-12 20:42:28,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:28,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773339111] [2021-06-12 20:42:28,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:28,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:28,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:28,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773339111] [2021-06-12 20:42:28,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773339111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:28,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698679881] [2021-06-12 20:42:28,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:28,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:42:28,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:28,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:28,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:28,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:42:28,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:28,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:28,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:28,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:42:28,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:28,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698679881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:28,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:28,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:42:28,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397142688] [2021-06-12 20:42:28,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:42:28,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:28,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:42:28,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:42:28,394 INFO L87 Difference]: Start difference. First operand 1987 states and 7170 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:29,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:29,290 INFO L93 Difference]: Finished difference Result 2492 states and 8720 transitions. [2021-06-12 20:42:29,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:42:29,290 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:29,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:29,294 INFO L225 Difference]: With dead ends: 2492 [2021-06-12 20:42:29,294 INFO L226 Difference]: Without dead ends: 2473 [2021-06-12 20:42:29,294 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 744.0ms TimeCoverageRelationStatistics Valid=247, Invalid=1313, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:42:29,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2021-06-12 20:42:29,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 1991. [2021-06-12 20:42:29,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1991 states, 1990 states have (on average 3.6105527638190953) internal successors, (7185), 1990 states have internal predecessors, (7185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:29,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 7185 transitions. [2021-06-12 20:42:29,327 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 7185 transitions. Word has length 24 [2021-06-12 20:42:29,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:29,327 INFO L482 AbstractCegarLoop]: Abstraction has 1991 states and 7185 transitions. [2021-06-12 20:42:29,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:29,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 7185 transitions. [2021-06-12 20:42:29,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:29,329 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:29,330 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:29,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable394 [2021-06-12 20:42:29,530 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:29,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:29,530 INFO L82 PathProgramCache]: Analyzing trace with hash 734717702, now seen corresponding path program 113 times [2021-06-12 20:42:29,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:29,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089639387] [2021-06-12 20:42:29,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:29,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:29,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:29,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:29,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089639387] [2021-06-12 20:42:29,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089639387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:29,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689827097] [2021-06-12 20:42:29,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:29,711 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:42:29,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:29,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:29,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:29,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:42:29,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:29,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:29,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:29,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:42:29,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:29,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689827097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:29,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:29,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:42:29,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559384170] [2021-06-12 20:42:29,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:42:29,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:29,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:42:29,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:42:29,866 INFO L87 Difference]: Start difference. First operand 1991 states and 7185 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:30,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:30,528 INFO L93 Difference]: Finished difference Result 2469 states and 8673 transitions. [2021-06-12 20:42:30,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:42:30,529 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:30,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:30,532 INFO L225 Difference]: With dead ends: 2469 [2021-06-12 20:42:30,532 INFO L226 Difference]: Without dead ends: 2459 [2021-06-12 20:42:30,532 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 613.8ms TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:42:30,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2021-06-12 20:42:30,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 1994. [2021-06-12 20:42:30,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 3.611138986452584) internal successors, (7197), 1993 states have internal predecessors, (7197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:30,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 7197 transitions. [2021-06-12 20:42:30,556 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 7197 transitions. Word has length 24 [2021-06-12 20:42:30,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:30,556 INFO L482 AbstractCegarLoop]: Abstraction has 1994 states and 7197 transitions. [2021-06-12 20:42:30,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:30,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 7197 transitions. [2021-06-12 20:42:30,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:30,559 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:30,559 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:30,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:30,759 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:30,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:30,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1058303880, now seen corresponding path program 114 times [2021-06-12 20:42:30,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:30,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728740467] [2021-06-12 20:42:30,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:30,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:30,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:30,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:30,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728740467] [2021-06-12 20:42:30,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728740467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:30,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108812401] [2021-06-12 20:42:30,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:30,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:42:30,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:30,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:42:30,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:31,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:31,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:42:31,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:31,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:31,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:31,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:42:31,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:31,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108812401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:31,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:31,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:42:31,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042459161] [2021-06-12 20:42:31,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:42:31,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:31,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:42:31,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:42:31,146 INFO L87 Difference]: Start difference. First operand 1994 states and 7197 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:32,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:32,033 INFO L93 Difference]: Finished difference Result 2464 states and 8603 transitions. [2021-06-12 20:42:32,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:42:32,034 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:32,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:32,037 INFO L225 Difference]: With dead ends: 2464 [2021-06-12 20:42:32,037 INFO L226 Difference]: Without dead ends: 2445 [2021-06-12 20:42:32,037 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 804.7ms TimeCoverageRelationStatistics Valid=287, Invalid=1273, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:42:32,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2021-06-12 20:42:32,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 1998. [2021-06-12 20:42:32,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1998 states, 1997 states have (on average 3.6119178768152227) internal successors, (7213), 1997 states have internal predecessors, (7213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:32,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1998 states to 1998 states and 7213 transitions. [2021-06-12 20:42:32,061 INFO L78 Accepts]: Start accepts. Automaton has 1998 states and 7213 transitions. Word has length 24 [2021-06-12 20:42:32,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:32,061 INFO L482 AbstractCegarLoop]: Abstraction has 1998 states and 7213 transitions. [2021-06-12 20:42:32,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:32,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1998 states and 7213 transitions. [2021-06-12 20:42:32,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:32,064 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:32,064 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:32,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:32,265 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:32,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:32,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1550919294, now seen corresponding path program 115 times [2021-06-12 20:42:32,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:32,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240833196] [2021-06-12 20:42:32,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:32,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:32,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:32,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:32,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240833196] [2021-06-12 20:42:32,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240833196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:32,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941982680] [2021-06-12 20:42:32,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:32,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:32,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:32,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:32,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:42:32,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:32,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:32,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:32,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:42:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:32,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941982680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:32,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:32,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:42:32,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718455033] [2021-06-12 20:42:32,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:42:32,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:32,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:42:32,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:42:32,600 INFO L87 Difference]: Start difference. First operand 1998 states and 7213 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:33,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:33,172 INFO L93 Difference]: Finished difference Result 2386 states and 8411 transitions. [2021-06-12 20:42:33,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:42:33,172 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:33,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:33,175 INFO L225 Difference]: With dead ends: 2386 [2021-06-12 20:42:33,175 INFO L226 Difference]: Without dead ends: 2373 [2021-06-12 20:42:33,176 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 562.5ms TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:42:33,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2021-06-12 20:42:33,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 1991. [2021-06-12 20:42:33,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1991 states, 1990 states have (on average 3.6105527638190953) internal successors, (7185), 1990 states have internal predecessors, (7185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:33,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 7185 transitions. [2021-06-12 20:42:33,200 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 7185 transitions. Word has length 24 [2021-06-12 20:42:33,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:33,200 INFO L482 AbstractCegarLoop]: Abstraction has 1991 states and 7185 transitions. [2021-06-12 20:42:33,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:33,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 7185 transitions. [2021-06-12 20:42:33,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:33,203 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:33,203 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:33,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-06-12 20:42:33,418 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:33,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:33,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1912653030, now seen corresponding path program 116 times [2021-06-12 20:42:33,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:33,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976358595] [2021-06-12 20:42:33,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:33,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:33,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:33,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:33,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976358595] [2021-06-12 20:42:33,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976358595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:33,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263192734] [2021-06-12 20:42:33,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:33,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:42:33,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:33,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 20:42:33,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:33,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:42:33,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:33,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:33,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:33,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:15 [2021-06-12 20:42:33,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:33,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263192734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:33,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:33,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:42:33,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806294604] [2021-06-12 20:42:33,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:42:33,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:33,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:42:33,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:42:33,907 INFO L87 Difference]: Start difference. First operand 1991 states and 7185 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:34,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:34,518 INFO L93 Difference]: Finished difference Result 2486 states and 8672 transitions. [2021-06-12 20:42:34,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:42:34,519 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:34,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:34,522 INFO L225 Difference]: With dead ends: 2486 [2021-06-12 20:42:34,522 INFO L226 Difference]: Without dead ends: 2434 [2021-06-12 20:42:34,522 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 580.7ms TimeCoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:42:34,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2434 states. [2021-06-12 20:42:34,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2434 to 1995. [2021-06-12 20:42:34,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 3.6093279839518555) internal successors, (7197), 1994 states have internal predecessors, (7197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:34,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 7197 transitions. [2021-06-12 20:42:34,554 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 7197 transitions. Word has length 24 [2021-06-12 20:42:34,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:34,554 INFO L482 AbstractCegarLoop]: Abstraction has 1995 states and 7197 transitions. [2021-06-12 20:42:34,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:34,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 7197 transitions. [2021-06-12 20:42:34,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:34,557 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:34,557 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:34,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-12 20:42:34,757 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:34,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:34,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1695228144, now seen corresponding path program 117 times [2021-06-12 20:42:34,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:34,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403885905] [2021-06-12 20:42:34,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:34,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:34,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:34,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:34,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403885905] [2021-06-12 20:42:34,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403885905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:34,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269070889] [2021-06-12 20:42:34,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:34,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:42:34,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:34,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:34,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:35,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:42:35,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:35,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 49 [2021-06-12 20:42:35,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:35,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:35,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:35,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:46 [2021-06-12 20:42:35,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:35,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269070889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:35,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:35,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:42:35,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653726192] [2021-06-12 20:42:35,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:42:35,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:35,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:42:35,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:42:35,221 INFO L87 Difference]: Start difference. First operand 1995 states and 7197 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:36,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:36,305 INFO L93 Difference]: Finished difference Result 2464 states and 8608 transitions. [2021-06-12 20:42:36,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:42:36,305 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:36,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:36,309 INFO L225 Difference]: With dead ends: 2464 [2021-06-12 20:42:36,309 INFO L226 Difference]: Without dead ends: 2445 [2021-06-12 20:42:36,309 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 959.5ms TimeCoverageRelationStatistics Valid=298, Invalid=1682, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:42:36,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2021-06-12 20:42:36,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 2002. [2021-06-12 20:42:36,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2002 states, 2001 states have (on average 3.6081959020489753) internal successors, (7220), 2001 states have internal predecessors, (7220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:36,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 7220 transitions. [2021-06-12 20:42:36,333 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 7220 transitions. Word has length 24 [2021-06-12 20:42:36,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:36,333 INFO L482 AbstractCegarLoop]: Abstraction has 2002 states and 7220 transitions. [2021-06-12 20:42:36,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:36,333 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 7220 transitions. [2021-06-12 20:42:36,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:36,335 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:36,335 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:36,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-06-12 20:42:36,536 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:36,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:36,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1766000712, now seen corresponding path program 118 times [2021-06-12 20:42:36,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:36,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513216432] [2021-06-12 20:42:36,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:36,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:36,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:36,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:36,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513216432] [2021-06-12 20:42:36,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513216432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:36,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370315187] [2021-06-12 20:42:36,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:36,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:42:36,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:36,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:36,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:36,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:42:36,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:36,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:36,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:36,839 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:42:36,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:36,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370315187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:36,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:36,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:42:36,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528399700] [2021-06-12 20:42:36,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:42:36,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:36,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:42:36,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:42:36,882 INFO L87 Difference]: Start difference. First operand 2002 states and 7220 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:37,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:37,678 INFO L93 Difference]: Finished difference Result 2479 states and 8688 transitions. [2021-06-12 20:42:37,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:42:37,678 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:37,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:37,681 INFO L225 Difference]: With dead ends: 2479 [2021-06-12 20:42:37,681 INFO L226 Difference]: Without dead ends: 2466 [2021-06-12 20:42:37,682 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 725.5ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:42:37,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2466 states. [2021-06-12 20:42:37,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2466 to 2000. [2021-06-12 20:42:37,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1999 states have (on average 3.6088044022011005) internal successors, (7214), 1999 states have internal predecessors, (7214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:37,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 7214 transitions. [2021-06-12 20:42:37,706 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 7214 transitions. Word has length 24 [2021-06-12 20:42:37,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:37,706 INFO L482 AbstractCegarLoop]: Abstraction has 2000 states and 7214 transitions. [2021-06-12 20:42:37,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:37,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 7214 transitions. [2021-06-12 20:42:37,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:37,708 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:37,708 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:37,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:37,909 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:37,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:37,909 INFO L82 PathProgramCache]: Analyzing trace with hash 933375312, now seen corresponding path program 119 times [2021-06-12 20:42:37,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:37,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267423387] [2021-06-12 20:42:37,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:37,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:38,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:38,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:38,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267423387] [2021-06-12 20:42:38,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267423387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:38,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073833370] [2021-06-12 20:42:38,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:38,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:42:38,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:38,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:38,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:38,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:42:38,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:38,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:38,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:38,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:42:38,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:38,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073833370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:38,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:38,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:42:38,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705882842] [2021-06-12 20:42:38,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:42:38,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:38,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:42:38,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:42:38,255 INFO L87 Difference]: Start difference. First operand 2000 states and 7214 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:38,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:38,994 INFO L93 Difference]: Finished difference Result 2408 states and 8475 transitions. [2021-06-12 20:42:38,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:42:38,994 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:38,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:38,998 INFO L225 Difference]: With dead ends: 2408 [2021-06-12 20:42:38,998 INFO L226 Difference]: Without dead ends: 2399 [2021-06-12 20:42:38,998 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 636.5ms TimeCoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:42:39,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2021-06-12 20:42:39,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2002. [2021-06-12 20:42:39,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2002 states, 2001 states have (on average 3.608695652173913) internal successors, (7221), 2001 states have internal predecessors, (7221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:39,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 7221 transitions. [2021-06-12 20:42:39,024 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 7221 transitions. Word has length 24 [2021-06-12 20:42:39,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:39,025 INFO L482 AbstractCegarLoop]: Abstraction has 2002 states and 7221 transitions. [2021-06-12 20:42:39,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:39,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 7221 transitions. [2021-06-12 20:42:39,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:39,027 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:39,027 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:39,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable407 [2021-06-12 20:42:39,229 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:39,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:39,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1256961490, now seen corresponding path program 120 times [2021-06-12 20:42:39,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:39,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879126425] [2021-06-12 20:42:39,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:39,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:39,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:39,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:39,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879126425] [2021-06-12 20:42:39,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879126425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:39,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051349510] [2021-06-12 20:42:39,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:39,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:42:39,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:39,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:42:39,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:39,497 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:39,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:42:39,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:39,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:39,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:39,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-12 20:42:39,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:39,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051349510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:39,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:39,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:42:39,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581195572] [2021-06-12 20:42:39,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:42:39,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:39,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:42:39,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:42:39,618 INFO L87 Difference]: Start difference. First operand 2002 states and 7221 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:40,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:40,718 INFO L93 Difference]: Finished difference Result 2501 states and 8707 transitions. [2021-06-12 20:42:40,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:42:40,719 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:40,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:40,722 INFO L225 Difference]: With dead ends: 2501 [2021-06-12 20:42:40,722 INFO L226 Difference]: Without dead ends: 2482 [2021-06-12 20:42:40,723 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 926.2ms TimeCoverageRelationStatistics Valid=355, Invalid=1537, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:42:40,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2482 states. [2021-06-12 20:42:40,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2482 to 2006. [2021-06-12 20:42:40,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2006 states, 2005 states have (on average 3.6099750623441396) internal successors, (7238), 2005 states have internal predecessors, (7238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:40,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 7238 transitions. [2021-06-12 20:42:40,755 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 7238 transitions. Word has length 24 [2021-06-12 20:42:40,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:40,755 INFO L482 AbstractCegarLoop]: Abstraction has 2006 states and 7238 transitions. [2021-06-12 20:42:40,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:40,755 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 7238 transitions. [2021-06-12 20:42:40,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:40,757 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:40,757 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:40,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:40,958 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:40,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:40,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1352261684, now seen corresponding path program 121 times [2021-06-12 20:42:40,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:40,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504980122] [2021-06-12 20:42:40,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:40,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:41,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:41,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:41,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504980122] [2021-06-12 20:42:41,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504980122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:41,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525915064] [2021-06-12 20:42:41,091 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:41,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:41,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:41,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:41,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:42:41,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:41,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:41,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:41,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:42:41,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:41,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525915064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:41,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:41,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:42:41,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509515734] [2021-06-12 20:42:41,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:42:41,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:41,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:42:41,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:42:41,264 INFO L87 Difference]: Start difference. First operand 2006 states and 7238 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:41,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:41,930 INFO L93 Difference]: Finished difference Result 2370 states and 8354 transitions. [2021-06-12 20:42:41,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:42:41,930 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:41,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:41,934 INFO L225 Difference]: With dead ends: 2370 [2021-06-12 20:42:41,934 INFO L226 Difference]: Without dead ends: 2359 [2021-06-12 20:42:41,934 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 551.4ms TimeCoverageRelationStatistics Valid=181, Invalid=941, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:42:41,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2021-06-12 20:42:41,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2004. [2021-06-12 20:42:41,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2004 states, 2003 states have (on average 3.6090863704443334) internal successors, (7229), 2003 states have internal predecessors, (7229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:41,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 7229 transitions. [2021-06-12 20:42:41,958 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 7229 transitions. Word has length 24 [2021-06-12 20:42:41,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:41,958 INFO L482 AbstractCegarLoop]: Abstraction has 2004 states and 7229 transitions. [2021-06-12 20:42:41,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:41,958 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 7229 transitions. [2021-06-12 20:42:41,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:41,960 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:41,960 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:42,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-12 20:42:42,161 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:42,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:42,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1230452128, now seen corresponding path program 122 times [2021-06-12 20:42:42,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:42,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256270311] [2021-06-12 20:42:42,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:42,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:42,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:42,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:42,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256270311] [2021-06-12 20:42:42,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256270311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:42,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704443026] [2021-06-12 20:42:42,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:42,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:42:42,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:42,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:42,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:42,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:42:42,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:42,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:42,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:42,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:42:42,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:42,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704443026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:42,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:42,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:42:42,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701065695] [2021-06-12 20:42:42,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:42:42,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:42,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:42:42,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:42:42,475 INFO L87 Difference]: Start difference. First operand 2004 states and 7229 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:43,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:43,329 INFO L93 Difference]: Finished difference Result 2441 states and 8576 transitions. [2021-06-12 20:42:43,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:42:43,329 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:43,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:43,333 INFO L225 Difference]: With dead ends: 2441 [2021-06-12 20:42:43,333 INFO L226 Difference]: Without dead ends: 2432 [2021-06-12 20:42:43,333 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 652.3ms TimeCoverageRelationStatistics Valid=253, Invalid=1307, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:42:43,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2021-06-12 20:42:43,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 2005. [2021-06-12 20:42:43,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2005 states, 2004 states have (on average 3.6092814371257487) internal successors, (7233), 2004 states have internal predecessors, (7233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:43,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 7233 transitions. [2021-06-12 20:42:43,358 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 7233 transitions. Word has length 24 [2021-06-12 20:42:43,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:43,358 INFO L482 AbstractCegarLoop]: Abstraction has 2005 states and 7233 transitions. [2021-06-12 20:42:43,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:43,358 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 7233 transitions. [2021-06-12 20:42:43,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:43,360 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:43,360 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:43,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-06-12 20:42:43,561 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:43,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:43,561 INFO L82 PathProgramCache]: Analyzing trace with hash 221424754, now seen corresponding path program 123 times [2021-06-12 20:42:43,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:43,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105209733] [2021-06-12 20:42:43,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:43,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:43,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:43,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:43,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105209733] [2021-06-12 20:42:43,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105209733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:43,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160574169] [2021-06-12 20:42:43,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:43,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:42:43,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:43,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 20:42:43,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:43,845 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:43,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 61 [2021-06-12 20:42:43,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:43,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:44,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:44,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:1840 [2021-06-12 20:42:44,552 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 58 [2021-06-12 20:42:44,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:44,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160574169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:44,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:44,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:42:44,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126700345] [2021-06-12 20:42:44,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:42:44,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:44,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:42:44,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:42:44,814 INFO L87 Difference]: Start difference. First operand 2005 states and 7233 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:45,184 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 38 [2021-06-12 20:42:45,864 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-06-12 20:42:46,310 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-06-12 20:42:46,455 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-06-12 20:42:46,615 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-06-12 20:42:46,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:46,872 INFO L93 Difference]: Finished difference Result 2333 states and 8246 transitions. [2021-06-12 20:42:46,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:42:46,872 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:46,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:46,876 INFO L225 Difference]: With dead ends: 2333 [2021-06-12 20:42:46,876 INFO L226 Difference]: Without dead ends: 2323 [2021-06-12 20:42:46,876 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 2389.0ms TimeCoverageRelationStatistics Valid=326, Invalid=1930, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:42:46,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2021-06-12 20:42:46,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 2007. [2021-06-12 20:42:46,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2007 states, 2006 states have (on average 3.610169491525424) internal successors, (7242), 2006 states have internal predecessors, (7242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:46,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2007 states to 2007 states and 7242 transitions. [2021-06-12 20:42:46,899 INFO L78 Accepts]: Start accepts. Automaton has 2007 states and 7242 transitions. Word has length 24 [2021-06-12 20:42:46,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:46,899 INFO L482 AbstractCegarLoop]: Abstraction has 2007 states and 7242 transitions. [2021-06-12 20:42:46,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:46,899 INFO L276 IsEmpty]: Start isEmpty. Operand 2007 states and 7242 transitions. [2021-06-12 20:42:46,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:46,901 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:46,902 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:47,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-06-12 20:42:47,102 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:47,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:47,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1940929934, now seen corresponding path program 124 times [2021-06-12 20:42:47,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:47,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010426780] [2021-06-12 20:42:47,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:47,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:47,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:47,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010426780] [2021-06-12 20:42:47,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010426780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:47,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274049911] [2021-06-12 20:42:47,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:47,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:42:47,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:47,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:47,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:47,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:42:47,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:47,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:47,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:47,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:42:47,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:47,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274049911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:47,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:47,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:42:47,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436421196] [2021-06-12 20:42:47,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:42:47,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:47,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:42:47,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:42:47,417 INFO L87 Difference]: Start difference. First operand 2007 states and 7242 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:48,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:48,122 INFO L93 Difference]: Finished difference Result 2425 states and 8523 transitions. [2021-06-12 20:42:48,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:42:48,123 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:48,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:48,126 INFO L225 Difference]: With dead ends: 2425 [2021-06-12 20:42:48,126 INFO L226 Difference]: Without dead ends: 2416 [2021-06-12 20:42:48,126 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 568.8ms TimeCoverageRelationStatistics Valid=236, Invalid=1170, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:42:48,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-06-12 20:42:48,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2006. [2021-06-12 20:42:48,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2006 states, 2005 states have (on average 3.6099750623441396) internal successors, (7238), 2005 states have internal predecessors, (7238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:48,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 7238 transitions. [2021-06-12 20:42:48,151 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 7238 transitions. Word has length 24 [2021-06-12 20:42:48,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:48,151 INFO L482 AbstractCegarLoop]: Abstraction has 2006 states and 7238 transitions. [2021-06-12 20:42:48,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:48,151 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 7238 transitions. [2021-06-12 20:42:48,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:48,153 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:48,153 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:48,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable451 [2021-06-12 20:42:48,353 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:48,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:48,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1166480298, now seen corresponding path program 125 times [2021-06-12 20:42:48,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:48,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603174247] [2021-06-12 20:42:48,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:48,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:48,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:48,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:48,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603174247] [2021-06-12 20:42:48,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603174247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:48,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014459330] [2021-06-12 20:42:48,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:48,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:42:48,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:48,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:48,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:48,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:42:48,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:48,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:48,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:48,617 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:42:48,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:48,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014459330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:48,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:48,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:42:48,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007924085] [2021-06-12 20:42:48,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:42:48,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:48,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:42:48,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:42:48,674 INFO L87 Difference]: Start difference. First operand 2006 states and 7238 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:49,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:49,389 INFO L93 Difference]: Finished difference Result 2401 states and 8458 transitions. [2021-06-12 20:42:49,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:42:49,390 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:49,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:49,393 INFO L225 Difference]: With dead ends: 2401 [2021-06-12 20:42:49,393 INFO L226 Difference]: Without dead ends: 2390 [2021-06-12 20:42:49,393 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 559.9ms TimeCoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:42:49,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2390 states. [2021-06-12 20:42:49,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2390 to 2008. [2021-06-12 20:42:49,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 3.6093672147483806) internal successors, (7244), 2007 states have internal predecessors, (7244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:49,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 7244 transitions. [2021-06-12 20:42:49,418 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 7244 transitions. Word has length 24 [2021-06-12 20:42:49,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:49,418 INFO L482 AbstractCegarLoop]: Abstraction has 2008 states and 7244 transitions. [2021-06-12 20:42:49,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:49,418 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 7244 transitions. [2021-06-12 20:42:49,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:49,421 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:49,421 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:49,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-06-12 20:42:49,621 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:49,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:49,621 INFO L82 PathProgramCache]: Analyzing trace with hash 2145894746, now seen corresponding path program 126 times [2021-06-12 20:42:49,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:49,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342146909] [2021-06-12 20:42:49,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:49,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:49,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:49,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342146909] [2021-06-12 20:42:49,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342146909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:49,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115039665] [2021-06-12 20:42:49,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:49,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:42:49,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:49,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:42:49,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:49,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:49,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:42:49,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:49,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:49,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:49,932 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-12 20:42:50,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:50,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115039665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:50,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:50,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:42:50,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973377456] [2021-06-12 20:42:50,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:42:50,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:50,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:42:50,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:42:50,056 INFO L87 Difference]: Start difference. First operand 2008 states and 7244 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:51,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:51,212 INFO L93 Difference]: Finished difference Result 2511 states and 8723 transitions. [2021-06-12 20:42:51,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:42:51,212 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:51,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:51,216 INFO L225 Difference]: With dead ends: 2511 [2021-06-12 20:42:51,216 INFO L226 Difference]: Without dead ends: 2492 [2021-06-12 20:42:51,216 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 961.8ms TimeCoverageRelationStatistics Valid=374, Invalid=1696, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:42:51,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2021-06-12 20:42:51,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 2010. [2021-06-12 20:42:51,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2010 states, 2009 states have (on average 3.6102538576406173) internal successors, (7253), 2009 states have internal predecessors, (7253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:51,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 7253 transitions. [2021-06-12 20:42:51,241 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 7253 transitions. Word has length 24 [2021-06-12 20:42:51,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:51,241 INFO L482 AbstractCegarLoop]: Abstraction has 2010 states and 7253 transitions. [2021-06-12 20:42:51,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:51,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 7253 transitions. [2021-06-12 20:42:51,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:51,243 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:51,243 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:51,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-06-12 20:42:51,444 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:51,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:51,444 INFO L82 PathProgramCache]: Analyzing trace with hash -428282352, now seen corresponding path program 127 times [2021-06-12 20:42:51,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:51,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108046832] [2021-06-12 20:42:51,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:51,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:51,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:51,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:51,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108046832] [2021-06-12 20:42:51,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108046832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:51,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408324687] [2021-06-12 20:42:51,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:51,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:51,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:51,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:51,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:42:51,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:51,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:51,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:51,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:42:51,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:51,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408324687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:51,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:51,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:42:51,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152873290] [2021-06-12 20:42:51,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:42:51,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:51,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:42:51,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:42:51,784 INFO L87 Difference]: Start difference. First operand 2010 states and 7253 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:52,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:52,339 INFO L93 Difference]: Finished difference Result 2354 states and 8315 transitions. [2021-06-12 20:42:52,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:42:52,339 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:52,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:52,342 INFO L225 Difference]: With dead ends: 2354 [2021-06-12 20:42:52,342 INFO L226 Difference]: Without dead ends: 2344 [2021-06-12 20:42:52,343 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 474.6ms TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:42:52,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2344 states. [2021-06-12 20:42:52,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2344 to 2008. [2021-06-12 20:42:52,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 3.610363726955655) internal successors, (7246), 2007 states have internal predecessors, (7246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:52,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 7246 transitions. [2021-06-12 20:42:52,367 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 7246 transitions. Word has length 24 [2021-06-12 20:42:52,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:52,367 INFO L482 AbstractCegarLoop]: Abstraction has 2008 states and 7246 transitions. [2021-06-12 20:42:52,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:52,367 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 7246 transitions. [2021-06-12 20:42:52,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:52,370 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:52,370 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:52,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:52,570 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:52,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:52,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1107281254, now seen corresponding path program 84 times [2021-06-12 20:42:52,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:52,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567602489] [2021-06-12 20:42:52,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:52,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:52,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:52,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:52,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567602489] [2021-06-12 20:42:52,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567602489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:52,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869544019] [2021-06-12 20:42:52,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:52,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:42:52,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:52,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:52,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:52,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:42:52,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:42:52,958 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:52,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-06-12 20:42:52,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:42:52,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:52,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:52,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-06-12 20:42:53,030 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:53,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869544019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:53,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:53,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:42:53,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325427712] [2021-06-12 20:42:53,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:42:53,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:53,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:42:53,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:42:53,031 INFO L87 Difference]: Start difference. First operand 2008 states and 7246 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:54,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:54,799 INFO L93 Difference]: Finished difference Result 2660 states and 9152 transitions. [2021-06-12 20:42:54,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 20:42:54,799 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:54,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:54,803 INFO L225 Difference]: With dead ends: 2660 [2021-06-12 20:42:54,803 INFO L226 Difference]: Without dead ends: 2590 [2021-06-12 20:42:54,803 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1379.0ms TimeCoverageRelationStatistics Valid=377, Invalid=2593, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 20:42:54,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2021-06-12 20:42:54,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 2017. [2021-06-12 20:42:54,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 3.6086309523809526) internal successors, (7275), 2016 states have internal predecessors, (7275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:54,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 7275 transitions. [2021-06-12 20:42:54,827 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 7275 transitions. Word has length 24 [2021-06-12 20:42:54,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:54,827 INFO L482 AbstractCegarLoop]: Abstraction has 2017 states and 7275 transitions. [2021-06-12 20:42:54,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:54,827 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 7275 transitions. [2021-06-12 20:42:54,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:54,829 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:54,830 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:55,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-06-12 20:42:55,030 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:55,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:55,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1923388560, now seen corresponding path program 85 times [2021-06-12 20:42:55,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:55,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599878660] [2021-06-12 20:42:55,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:55,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:55,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:55,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:55,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599878660] [2021-06-12 20:42:55,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599878660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:55,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978025981] [2021-06-12 20:42:55,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:55,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:55,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:42:55,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:55,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:42:55,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:55,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:55,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:55,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:42:55,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:55,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978025981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:55,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:55,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:42:55,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192272613] [2021-06-12 20:42:55,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:42:55,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:55,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:42:55,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:42:55,420 INFO L87 Difference]: Start difference. First operand 2017 states and 7275 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:57,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:57,169 INFO L93 Difference]: Finished difference Result 2582 states and 8988 transitions. [2021-06-12 20:42:57,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 20:42:57,169 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:57,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:57,173 INFO L225 Difference]: With dead ends: 2582 [2021-06-12 20:42:57,173 INFO L226 Difference]: Without dead ends: 2540 [2021-06-12 20:42:57,173 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1379.4ms TimeCoverageRelationStatistics Valid=435, Invalid=2535, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 20:42:57,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2540 states. [2021-06-12 20:42:57,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2540 to 2020. [2021-06-12 20:42:57,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 2019 states have (on average 3.6077265973254087) internal successors, (7284), 2019 states have internal predecessors, (7284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:57,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 7284 transitions. [2021-06-12 20:42:57,198 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 7284 transitions. Word has length 24 [2021-06-12 20:42:57,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:57,199 INFO L482 AbstractCegarLoop]: Abstraction has 2020 states and 7284 transitions. [2021-06-12 20:42:57,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:57,199 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 7284 transitions. [2021-06-12 20:42:57,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:57,201 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:57,201 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:57,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:57,401 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:57,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:57,402 INFO L82 PathProgramCache]: Analyzing trace with hash -2099929992, now seen corresponding path program 86 times [2021-06-12 20:42:57,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:57,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625478337] [2021-06-12 20:42:57,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:57,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:57,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:57,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:57,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625478337] [2021-06-12 20:42:57,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625478337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:57,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663333399] [2021-06-12 20:42:57,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:57,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:42:57,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:42:57,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:42:57,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:42:57,724 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:57,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:42:57,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:42:57,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:42:57,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:42:57,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:42:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:57,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663333399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:57,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:42:57,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:42:57,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601437377] [2021-06-12 20:42:57,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:42:57,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:42:57,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:42:57,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:42:57,818 INFO L87 Difference]: Start difference. First operand 2020 states and 7284 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:59,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:42:59,571 INFO L93 Difference]: Finished difference Result 2539 states and 8854 transitions. [2021-06-12 20:42:59,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 20:42:59,572 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:42:59,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:42:59,575 INFO L225 Difference]: With dead ends: 2539 [2021-06-12 20:42:59,575 INFO L226 Difference]: Without dead ends: 2493 [2021-06-12 20:42:59,576 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1550.3ms TimeCoverageRelationStatistics Valid=513, Invalid=2909, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 20:42:59,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2021-06-12 20:42:59,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2027. [2021-06-12 20:42:59,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 2026 states have (on average 3.6076011846001976) internal successors, (7309), 2026 states have internal predecessors, (7309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:59,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 7309 transitions. [2021-06-12 20:42:59,605 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 7309 transitions. Word has length 24 [2021-06-12 20:42:59,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:42:59,605 INFO L482 AbstractCegarLoop]: Abstraction has 2027 states and 7309 transitions. [2021-06-12 20:42:59,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:42:59,605 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 7309 transitions. [2021-06-12 20:42:59,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:42:59,607 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:42:59,607 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:42:59,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:42:59,808 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:42:59,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:42:59,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1361298864, now seen corresponding path program 87 times [2021-06-12 20:42:59,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:42:59,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833951963] [2021-06-12 20:42:59,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:42:59,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:42:59,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:42:59,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:42:59,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833951963] [2021-06-12 20:42:59,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833951963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:42:59,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389150326] [2021-06-12 20:42:59,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:00,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:43:00,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:00,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:43:00,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:00,124 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:00,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:43:00,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:00,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:00,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:00,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:43:00,222 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:00,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389150326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:00,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:00,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:43:00,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689562023] [2021-06-12 20:43:00,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:43:00,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:00,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:43:00,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:43:00,223 INFO L87 Difference]: Start difference. First operand 2027 states and 7309 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:01,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:01,781 INFO L93 Difference]: Finished difference Result 2478 states and 8649 transitions. [2021-06-12 20:43:01,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:43:01,781 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:43:01,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:01,785 INFO L225 Difference]: With dead ends: 2478 [2021-06-12 20:43:01,785 INFO L226 Difference]: Without dead ends: 2457 [2021-06-12 20:43:01,785 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1324.9ms TimeCoverageRelationStatistics Valid=374, Invalid=2076, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:43:01,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-06-12 20:43:01,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2026. [2021-06-12 20:43:01,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2026 states, 2025 states have (on average 3.608395061728395) internal successors, (7307), 2025 states have internal predecessors, (7307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:01,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2026 states to 2026 states and 7307 transitions. [2021-06-12 20:43:01,823 INFO L78 Accepts]: Start accepts. Automaton has 2026 states and 7307 transitions. Word has length 24 [2021-06-12 20:43:01,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:01,823 INFO L482 AbstractCegarLoop]: Abstraction has 2026 states and 7307 transitions. [2021-06-12 20:43:01,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:01,823 INFO L276 IsEmpty]: Start isEmpty. Operand 2026 states and 7307 transitions. [2021-06-12 20:43:01,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:43:01,826 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:01,826 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:02,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable464,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:02,026 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:43:02,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:02,027 INFO L82 PathProgramCache]: Analyzing trace with hash 2143132664, now seen corresponding path program 88 times [2021-06-12 20:43:02,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:02,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343694128] [2021-06-12 20:43:02,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:02,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:02,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:02,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343694128] [2021-06-12 20:43:02,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343694128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:02,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403092367] [2021-06-12 20:43:02,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:02,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:43:02,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:02,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:43:02,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:02,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:43:02,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:02,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:02,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:02,324 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:43:02,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:02,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403092367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:02,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:02,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:43:02,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667914573] [2021-06-12 20:43:02,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:43:02,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:02,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:43:02,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:43:02,365 INFO L87 Difference]: Start difference. First operand 2026 states and 7307 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:03,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:03,435 INFO L93 Difference]: Finished difference Result 2424 states and 8516 transitions. [2021-06-12 20:43:03,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:43:03,436 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:43:03,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:03,439 INFO L225 Difference]: With dead ends: 2424 [2021-06-12 20:43:03,439 INFO L226 Difference]: Without dead ends: 2407 [2021-06-12 20:43:03,439 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 941.9ms TimeCoverageRelationStatistics Valid=283, Invalid=1609, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:43:03,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2021-06-12 20:43:03,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 2023. [2021-06-12 20:43:03,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2022 states have (on average 3.609297725024728) internal successors, (7298), 2022 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:03,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 7298 transitions. [2021-06-12 20:43:03,462 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 7298 transitions. Word has length 24 [2021-06-12 20:43:03,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:03,463 INFO L482 AbstractCegarLoop]: Abstraction has 2023 states and 7298 transitions. [2021-06-12 20:43:03,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:03,463 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 7298 transitions. [2021-06-12 20:43:03,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:43:03,465 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:03,465 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:03,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:03,669 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:43:03,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:03,669 INFO L82 PathProgramCache]: Analyzing trace with hash -460321124, now seen corresponding path program 128 times [2021-06-12 20:43:03,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:03,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151242719] [2021-06-12 20:43:03,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:03,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:03,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:03,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:03,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151242719] [2021-06-12 20:43:03,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151242719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:03,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957639190] [2021-06-12 20:43:03,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:03,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:43:03,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:03,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:43:03,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:04,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:43:04,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:43:04,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:43:04,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:04,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:04,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:04,090 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 20:43:04,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:04,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957639190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:04,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:04,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:43:04,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435064907] [2021-06-12 20:43:04,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:43:04,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:04,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:43:04,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:43:04,119 INFO L87 Difference]: Start difference. First operand 2023 states and 7298 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:05,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:05,740 INFO L93 Difference]: Finished difference Result 2630 states and 9090 transitions. [2021-06-12 20:43:05,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 20:43:05,741 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:43:05,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:05,744 INFO L225 Difference]: With dead ends: 2630 [2021-06-12 20:43:05,744 INFO L226 Difference]: Without dead ends: 2580 [2021-06-12 20:43:05,744 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1347.5ms TimeCoverageRelationStatistics Valid=397, Invalid=2359, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 20:43:05,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2580 states. [2021-06-12 20:43:05,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2580 to 2026. [2021-06-12 20:43:05,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2026 states, 2025 states have (on average 3.608888888888889) internal successors, (7308), 2025 states have internal predecessors, (7308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:05,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2026 states to 2026 states and 7308 transitions. [2021-06-12 20:43:05,769 INFO L78 Accepts]: Start accepts. Automaton has 2026 states and 7308 transitions. Word has length 24 [2021-06-12 20:43:05,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:05,769 INFO L482 AbstractCegarLoop]: Abstraction has 2026 states and 7308 transitions. [2021-06-12 20:43:05,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:05,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2026 states and 7308 transitions. [2021-06-12 20:43:05,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:43:05,772 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:05,772 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:05,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-06-12 20:43:05,972 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:43:05,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:05,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1268350622, now seen corresponding path program 129 times [2021-06-12 20:43:05,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:05,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590091165] [2021-06-12 20:43:05,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:05,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:06,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:06,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:06,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590091165] [2021-06-12 20:43:06,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590091165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:06,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708959426] [2021-06-12 20:43:06,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:06,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:43:06,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:06,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:43:06,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:06,351 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:06,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-12 20:43:06,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:06,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:06,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:06,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-12 20:43:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:06,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708959426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:06,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:06,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:43:06,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540395623] [2021-06-12 20:43:06,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:43:06,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:06,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:43:06,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:43:06,432 INFO L87 Difference]: Start difference. First operand 2026 states and 7308 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:06,671 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-06-12 20:43:08,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:08,879 INFO L93 Difference]: Finished difference Result 2613 states and 9074 transitions. [2021-06-12 20:43:08,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 20:43:08,879 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:43:08,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:08,883 INFO L225 Difference]: With dead ends: 2613 [2021-06-12 20:43:08,883 INFO L226 Difference]: Without dead ends: 2574 [2021-06-12 20:43:08,884 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 2108.9ms TimeCoverageRelationStatistics Valid=606, Invalid=3554, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 20:43:08,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2021-06-12 20:43:08,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 2029. [2021-06-12 20:43:08,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2029 states, 2028 states have (on average 3.608481262327416) internal successors, (7318), 2028 states have internal predecessors, (7318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:08,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 7318 transitions. [2021-06-12 20:43:08,909 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 7318 transitions. Word has length 24 [2021-06-12 20:43:08,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:08,909 INFO L482 AbstractCegarLoop]: Abstraction has 2029 states and 7318 transitions. [2021-06-12 20:43:08,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:08,909 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 7318 transitions. [2021-06-12 20:43:08,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:43:08,911 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:08,911 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:09,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:09,112 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:43:09,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:09,112 INFO L82 PathProgramCache]: Analyzing trace with hash 240200762, now seen corresponding path program 130 times [2021-06-12 20:43:09,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:09,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987104844] [2021-06-12 20:43:09,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:09,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:09,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:09,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:09,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987104844] [2021-06-12 20:43:09,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987104844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:09,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162173609] [2021-06-12 20:43:09,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:09,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:43:09,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:09,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:43:09,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:09,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:43:09,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:09,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:09,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:09,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:43:09,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:09,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162173609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:09,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:09,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:43:09,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052150070] [2021-06-12 20:43:09,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:43:09,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:09,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:43:09,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:43:09,465 INFO L87 Difference]: Start difference. First operand 2029 states and 7318 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:10,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:10,668 INFO L93 Difference]: Finished difference Result 2464 states and 8660 transitions. [2021-06-12 20:43:10,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 20:43:10,669 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:43:10,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:10,672 INFO L225 Difference]: With dead ends: 2464 [2021-06-12 20:43:10,672 INFO L226 Difference]: Without dead ends: 2438 [2021-06-12 20:43:10,672 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1068.3ms TimeCoverageRelationStatistics Valid=384, Invalid=1872, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:43:10,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2021-06-12 20:43:10,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 2032. [2021-06-12 20:43:10,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 2031 states have (on average 3.6070901033973413) internal successors, (7326), 2031 states have internal predecessors, (7326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:10,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 7326 transitions. [2021-06-12 20:43:10,706 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 7326 transitions. Word has length 24 [2021-06-12 20:43:10,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:10,706 INFO L482 AbstractCegarLoop]: Abstraction has 2032 states and 7326 transitions. [2021-06-12 20:43:10,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:10,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 7326 transitions. [2021-06-12 20:43:10,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:43:10,708 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:10,708 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:10,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:10,910 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:43:10,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:10,910 INFO L82 PathProgramCache]: Analyzing trace with hash 563786940, now seen corresponding path program 131 times [2021-06-12 20:43:10,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:10,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409887095] [2021-06-12 20:43:10,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:10,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:11,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:11,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:11,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409887095] [2021-06-12 20:43:11,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409887095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:11,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321295385] [2021-06-12 20:43:11,068 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:11,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:43:11,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:11,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:43:11,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:11,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:43:11,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:11,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:11,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:11,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:43:11,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:11,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321295385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:11,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:11,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:43:11,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618056647] [2021-06-12 20:43:11,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:43:11,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:11,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:43:11,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:43:11,249 INFO L87 Difference]: Start difference. First operand 2032 states and 7326 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:12,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:12,355 INFO L93 Difference]: Finished difference Result 2452 states and 8624 transitions. [2021-06-12 20:43:12,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:43:12,355 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:43:12,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:12,358 INFO L225 Difference]: With dead ends: 2452 [2021-06-12 20:43:12,358 INFO L226 Difference]: Without dead ends: 2427 [2021-06-12 20:43:12,358 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 904.2ms TimeCoverageRelationStatistics Valid=285, Invalid=1437, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:43:12,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2021-06-12 20:43:12,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 2025. [2021-06-12 20:43:12,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2025 states, 2024 states have (on average 3.6096837944664033) internal successors, (7306), 2024 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:12,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2025 states to 2025 states and 7306 transitions. [2021-06-12 20:43:12,381 INFO L78 Accepts]: Start accepts. Automaton has 2025 states and 7306 transitions. Word has length 24 [2021-06-12 20:43:12,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:12,382 INFO L482 AbstractCegarLoop]: Abstraction has 2025 states and 7306 transitions. [2021-06-12 20:43:12,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:12,382 INFO L276 IsEmpty]: Start isEmpty. Operand 2025 states and 7306 transitions. [2021-06-12 20:43:12,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:43:12,384 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:12,384 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:12,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable473 [2021-06-12 20:43:12,585 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:43:12,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:12,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1854959050, now seen corresponding path program 89 times [2021-06-12 20:43:12,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:12,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312020089] [2021-06-12 20:43:12,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:12,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:12,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:12,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:12,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312020089] [2021-06-12 20:43:12,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312020089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:12,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116424399] [2021-06-12 20:43:12,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:12,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:43:12,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:12,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:43:12,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:12,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:43:12,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:12,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:12,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:12,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:43:12,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:12,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116424399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:12,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:12,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:43:12,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772380322] [2021-06-12 20:43:12,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:43:12,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:12,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:43:12,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:43:12,937 INFO L87 Difference]: Start difference. First operand 2025 states and 7306 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:15,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:15,077 INFO L93 Difference]: Finished difference Result 2892 states and 9978 transitions. [2021-06-12 20:43:15,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 20:43:15,080 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:43:15,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:15,085 INFO L225 Difference]: With dead ends: 2892 [2021-06-12 20:43:15,085 INFO L226 Difference]: Without dead ends: 2832 [2021-06-12 20:43:15,085 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 1724.1ms TimeCoverageRelationStatistics Valid=585, Invalid=2955, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 20:43:15,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-06-12 20:43:15,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 2045. [2021-06-12 20:43:15,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2045 states, 2044 states have (on average 3.606164383561644) internal successors, (7371), 2044 states have internal predecessors, (7371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:15,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2045 states to 2045 states and 7371 transitions. [2021-06-12 20:43:15,111 INFO L78 Accepts]: Start accepts. Automaton has 2045 states and 7371 transitions. Word has length 24 [2021-06-12 20:43:15,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:15,111 INFO L482 AbstractCegarLoop]: Abstraction has 2045 states and 7371 transitions. [2021-06-12 20:43:15,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:15,112 INFO L276 IsEmpty]: Start isEmpty. Operand 2045 states and 7371 transitions. [2021-06-12 20:43:15,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:43:15,114 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:15,114 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:15,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-06-12 20:43:15,315 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:43:15,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:15,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1238645496, now seen corresponding path program 90 times [2021-06-12 20:43:15,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:15,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306922567] [2021-06-12 20:43:15,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:15,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:15,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:15,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:15,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306922567] [2021-06-12 20:43:15,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306922567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:15,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018502861] [2021-06-12 20:43:15,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:15,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:43:15,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:15,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:43:15,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:15,625 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:15,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:43:15,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:15,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:15,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:15,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:43:15,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:15,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018502861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:15,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:15,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:43:15,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496639114] [2021-06-12 20:43:15,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:43:15,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:15,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:43:15,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:43:15,733 INFO L87 Difference]: Start difference. First operand 2045 states and 7371 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:17,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:17,896 INFO L93 Difference]: Finished difference Result 2693 states and 9333 transitions. [2021-06-12 20:43:17,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 20:43:17,897 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:43:17,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:17,901 INFO L225 Difference]: With dead ends: 2693 [2021-06-12 20:43:17,901 INFO L226 Difference]: Without dead ends: 2642 [2021-06-12 20:43:17,902 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 1906.8ms TimeCoverageRelationStatistics Valid=652, Invalid=3380, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 20:43:17,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-06-12 20:43:17,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 2049. [2021-06-12 20:43:17,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 3.60546875) internal successors, (7384), 2048 states have internal predecessors, (7384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:17,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 7384 transitions. [2021-06-12 20:43:17,928 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 7384 transitions. Word has length 24 [2021-06-12 20:43:17,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:17,928 INFO L482 AbstractCegarLoop]: Abstraction has 2049 states and 7384 transitions. [2021-06-12 20:43:17,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:17,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 7384 transitions. [2021-06-12 20:43:17,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:43:17,930 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:17,930 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:18,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-06-12 20:43:18,132 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:43:18,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:18,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1797839404, now seen corresponding path program 132 times [2021-06-12 20:43:18,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:18,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722088684] [2021-06-12 20:43:18,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:18,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:18,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:18,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:18,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722088684] [2021-06-12 20:43:18,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722088684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:18,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460252562] [2021-06-12 20:43:18,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:18,345 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:43:18,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:18,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:43:18,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:18,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:43:18,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:43:18,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:43:18,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:18,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:18,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:18,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 20:43:18,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:18,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460252562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:18,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:18,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:43:18,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309616845] [2021-06-12 20:43:18,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:43:18,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:18,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:43:18,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:43:18,600 INFO L87 Difference]: Start difference. First operand 2049 states and 7384 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:20,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:20,929 INFO L93 Difference]: Finished difference Result 2862 states and 9855 transitions. [2021-06-12 20:43:20,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 20:43:20,929 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:43:20,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:20,933 INFO L225 Difference]: With dead ends: 2862 [2021-06-12 20:43:20,933 INFO L226 Difference]: Without dead ends: 2804 [2021-06-12 20:43:20,934 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1298 ImplicationChecksByTransitivity, 2025.9ms TimeCoverageRelationStatistics Valid=732, Invalid=3690, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 20:43:20,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2804 states. [2021-06-12 20:43:20,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 2057. [2021-06-12 20:43:20,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2057 states, 2056 states have (on average 3.6060311284046693) internal successors, (7414), 2056 states have internal predecessors, (7414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:20,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 7414 transitions. [2021-06-12 20:43:20,959 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 7414 transitions. Word has length 24 [2021-06-12 20:43:20,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:20,959 INFO L482 AbstractCegarLoop]: Abstraction has 2057 states and 7414 transitions. [2021-06-12 20:43:20,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:20,959 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 7414 transitions. [2021-06-12 20:43:20,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:43:20,962 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:20,962 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:21,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable477,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:21,162 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:43:21,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:21,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1468978032, now seen corresponding path program 133 times [2021-06-12 20:43:21,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:21,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608912662] [2021-06-12 20:43:21,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:21,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:21,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:21,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:21,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608912662] [2021-06-12 20:43:21,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608912662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:21,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114089792] [2021-06-12 20:43:21,319 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:21,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:21,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:43:21,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:21,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:43:21,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:21,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:21,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:21,463 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:43:21,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:21,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114089792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:21,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:21,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:43:21,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746988937] [2021-06-12 20:43:21,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:43:21,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:21,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:43:21,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:43:21,502 INFO L87 Difference]: Start difference. First operand 2057 states and 7414 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:23,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:23,300 INFO L93 Difference]: Finished difference Result 2726 states and 9487 transitions. [2021-06-12 20:43:23,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 20:43:23,300 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:43:23,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:23,304 INFO L225 Difference]: With dead ends: 2726 [2021-06-12 20:43:23,304 INFO L226 Difference]: Without dead ends: 2684 [2021-06-12 20:43:23,304 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 1513.2ms TimeCoverageRelationStatistics Valid=592, Invalid=2600, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 20:43:23,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2684 states. [2021-06-12 20:43:23,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2684 to 2061. [2021-06-12 20:43:23,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 2060 states have (on average 3.6048543689320387) internal successors, (7426), 2060 states have internal predecessors, (7426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:23,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 7426 transitions. [2021-06-12 20:43:23,337 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 7426 transitions. Word has length 24 [2021-06-12 20:43:23,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:23,338 INFO L482 AbstractCegarLoop]: Abstraction has 2061 states and 7426 transitions. [2021-06-12 20:43:23,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:23,338 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 7426 transitions. [2021-06-12 20:43:23,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:43:23,340 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:23,340 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:23,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-12 20:43:23,540 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:43:23,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:23,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1792564210, now seen corresponding path program 134 times [2021-06-12 20:43:23,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:23,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852610563] [2021-06-12 20:43:23,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:23,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:23,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:23,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852610563] [2021-06-12 20:43:23,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852610563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:23,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003405498] [2021-06-12 20:43:23,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:23,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:43:23,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:23,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:43:23,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:23,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:23,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:43:23,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:23,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:23,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:23,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:43:23,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:23,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003405498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:23,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:23,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:43:23,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643135806] [2021-06-12 20:43:23,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:43:23,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:23,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:43:23,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:43:23,927 INFO L87 Difference]: Start difference. First operand 2061 states and 7426 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:26,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:26,112 INFO L93 Difference]: Finished difference Result 2706 states and 9360 transitions. [2021-06-12 20:43:26,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 20:43:26,112 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:43:26,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:26,116 INFO L225 Difference]: With dead ends: 2706 [2021-06-12 20:43:26,116 INFO L226 Difference]: Without dead ends: 2666 [2021-06-12 20:43:26,117 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 1861.3ms TimeCoverageRelationStatistics Valid=645, Invalid=3261, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 20:43:26,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2021-06-12 20:43:26,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 2069. [2021-06-12 20:43:26,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2069 states, 2068 states have (on average 3.604448742746615) internal successors, (7454), 2068 states have internal predecessors, (7454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:26,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 7454 transitions. [2021-06-12 20:43:26,143 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 7454 transitions. Word has length 24 [2021-06-12 20:43:26,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:26,143 INFO L482 AbstractCegarLoop]: Abstraction has 2069 states and 7454 transitions. [2021-06-12 20:43:26,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:26,143 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 7454 transitions. [2021-06-12 20:43:26,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:43:26,146 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:26,146 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:26,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:26,346 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:43:26,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:26,346 INFO L82 PathProgramCache]: Analyzing trace with hash -816658964, now seen corresponding path program 135 times [2021-06-12 20:43:26,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:26,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728513920] [2021-06-12 20:43:26,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:26,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:26,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:26,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:26,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728513920] [2021-06-12 20:43:26,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728513920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:26,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359542790] [2021-06-12 20:43:26,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:26,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:43:26,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:26,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:43:26,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:26,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:43:26,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:26,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:26,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:26,630 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:43:26,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:26,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359542790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:26,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:26,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:43:26,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246982300] [2021-06-12 20:43:26,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:43:26,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:26,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:43:26,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:43:26,667 INFO L87 Difference]: Start difference. First operand 2069 states and 7454 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:28,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:28,105 INFO L93 Difference]: Finished difference Result 2577 states and 9029 transitions. [2021-06-12 20:43:28,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 20:43:28,105 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:43:28,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:28,109 INFO L225 Difference]: With dead ends: 2577 [2021-06-12 20:43:28,109 INFO L226 Difference]: Without dead ends: 2556 [2021-06-12 20:43:28,110 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1244.9ms TimeCoverageRelationStatistics Valid=449, Invalid=2101, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:43:28,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-06-12 20:43:28,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2053. [2021-06-12 20:43:28,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 2052 states have (on average 3.6062378167641325) internal successors, (7400), 2052 states have internal predecessors, (7400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:28,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 7400 transitions. [2021-06-12 20:43:28,135 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 7400 transitions. Word has length 24 [2021-06-12 20:43:28,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:28,135 INFO L482 AbstractCegarLoop]: Abstraction has 2053 states and 7400 transitions. [2021-06-12 20:43:28,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:28,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 7400 transitions. [2021-06-12 20:43:28,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:43:28,137 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:28,137 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:28,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:28,338 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:43:28,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:28,338 INFO L82 PathProgramCache]: Analyzing trace with hash -357681178, now seen corresponding path program 91 times [2021-06-12 20:43:28,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:28,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037969299] [2021-06-12 20:43:28,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:28,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:28,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:28,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:28,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037969299] [2021-06-12 20:43:28,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037969299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:28,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525481746] [2021-06-12 20:43:28,511 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:28,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:28,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:43:28,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:28,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:43:28,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:28,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:28,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:28,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:43:28,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:28,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525481746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:28,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:28,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:43:28,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938037142] [2021-06-12 20:43:28,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:43:28,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:28,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:43:28,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:43:28,685 INFO L87 Difference]: Start difference. First operand 2053 states and 7400 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:31,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:31,224 INFO L93 Difference]: Finished difference Result 3882 states and 12995 transitions. [2021-06-12 20:43:31,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-12 20:43:31,224 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:43:31,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:31,230 INFO L225 Difference]: With dead ends: 3882 [2021-06-12 20:43:31,230 INFO L226 Difference]: Without dead ends: 3817 [2021-06-12 20:43:31,230 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2159 ImplicationChecksByTransitivity, 2213.6ms TimeCoverageRelationStatistics Valid=1169, Invalid=4993, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 20:43:31,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3817 states. [2021-06-12 20:43:31,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3817 to 2126. [2021-06-12 20:43:31,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 3.6291764705882352) internal successors, (7712), 2125 states have internal predecessors, (7712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:31,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 7712 transitions. [2021-06-12 20:43:31,264 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 7712 transitions. Word has length 24 [2021-06-12 20:43:31,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:31,264 INFO L482 AbstractCegarLoop]: Abstraction has 2126 states and 7712 transitions. [2021-06-12 20:43:31,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:31,264 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 7712 transitions. [2021-06-12 20:43:31,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:43:31,266 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:31,266 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:31,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:31,467 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:43:31,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:31,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1879791260, now seen corresponding path program 136 times [2021-06-12 20:43:31,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:31,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907849440] [2021-06-12 20:43:31,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:31,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:31,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:31,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907849440] [2021-06-12 20:43:31,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907849440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:31,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649352787] [2021-06-12 20:43:31,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:31,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:43:31,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:31,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:43:31,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:31,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:43:31,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:31,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:31,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:31,760 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:43:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:31,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649352787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:31,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:31,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:43:31,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809386751] [2021-06-12 20:43:31,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:43:31,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:31,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:43:31,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:43:31,806 INFO L87 Difference]: Start difference. First operand 2126 states and 7712 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:34,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:34,235 INFO L93 Difference]: Finished difference Result 3896 states and 13187 transitions. [2021-06-12 20:43:34,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-12 20:43:34,235 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:43:34,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:34,241 INFO L225 Difference]: With dead ends: 3896 [2021-06-12 20:43:34,241 INFO L226 Difference]: Without dead ends: 3835 [2021-06-12 20:43:34,242 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2130 ImplicationChecksByTransitivity, 2083.0ms TimeCoverageRelationStatistics Valid=1154, Invalid=5008, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 20:43:34,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3835 states. [2021-06-12 20:43:34,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3835 to 2196. [2021-06-12 20:43:34,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 3.655125284738041) internal successors, (8023), 2195 states have internal predecessors, (8023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:34,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 8023 transitions. [2021-06-12 20:43:34,288 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 8023 transitions. Word has length 24 [2021-06-12 20:43:34,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:34,288 INFO L482 AbstractCegarLoop]: Abstraction has 2196 states and 8023 transitions. [2021-06-12 20:43:34,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:34,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 8023 transitions. [2021-06-12 20:43:34,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:43:34,291 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:34,291 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:34,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:34,491 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:43:34,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:34,492 INFO L82 PathProgramCache]: Analyzing trace with hash -2091589858, now seen corresponding path program 137 times [2021-06-12 20:43:34,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:34,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402101597] [2021-06-12 20:43:34,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:34,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:34,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:34,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:34,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402101597] [2021-06-12 20:43:34,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402101597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:34,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802622686] [2021-06-12 20:43:34,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:34,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:43:34,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:34,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:43:34,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:34,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:43:34,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:34,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:34,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:34,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:43:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:34,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802622686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:34,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:34,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:43:34,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980587983] [2021-06-12 20:43:34,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:43:34,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:34,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:43:34,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:43:34,819 INFO L87 Difference]: Start difference. First operand 2196 states and 8023 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:37,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:37,071 INFO L93 Difference]: Finished difference Result 3701 states and 12762 transitions. [2021-06-12 20:43:37,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 20:43:37,071 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:43:37,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:37,077 INFO L225 Difference]: With dead ends: 3701 [2021-06-12 20:43:37,077 INFO L226 Difference]: Without dead ends: 3658 [2021-06-12 20:43:37,078 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1820 ImplicationChecksByTransitivity, 1879.1ms TimeCoverageRelationStatistics Valid=974, Invalid=4428, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 20:43:37,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3658 states. [2021-06-12 20:43:37,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3658 to 2202. [2021-06-12 20:43:37,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 2201 states have (on average 3.659700136301681) internal successors, (8055), 2201 states have internal predecessors, (8055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:37,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 8055 transitions. [2021-06-12 20:43:37,117 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 8055 transitions. Word has length 24 [2021-06-12 20:43:37,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:37,117 INFO L482 AbstractCegarLoop]: Abstraction has 2202 states and 8055 transitions. [2021-06-12 20:43:37,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:37,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 8055 transitions. [2021-06-12 20:43:37,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:43:37,120 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:37,120 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:37,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-06-12 20:43:37,321 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:43:37,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:37,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1554667190, now seen corresponding path program 92 times [2021-06-12 20:43:37,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:37,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188606248] [2021-06-12 20:43:37,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:37,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:37,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:37,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188606248] [2021-06-12 20:43:37,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188606248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:37,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966972104] [2021-06-12 20:43:37,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:37,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:43:37,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:37,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:43:37,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:37,629 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:37,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-12 20:43:37,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:37,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:37,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:37,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-12 20:43:37,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:37,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966972104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:37,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:37,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:43:37,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862391518] [2021-06-12 20:43:37,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:43:37,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:37,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:43:37,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:43:37,714 INFO L87 Difference]: Start difference. First operand 2202 states and 8055 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:40,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:40,449 INFO L93 Difference]: Finished difference Result 3738 states and 12902 transitions. [2021-06-12 20:43:40,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-12 20:43:40,449 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:43:40,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:40,455 INFO L225 Difference]: With dead ends: 3738 [2021-06-12 20:43:40,455 INFO L226 Difference]: Without dead ends: 3704 [2021-06-12 20:43:40,456 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1818 ImplicationChecksByTransitivity, 2285.1ms TimeCoverageRelationStatistics Valid=931, Invalid=4619, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 20:43:40,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3704 states. [2021-06-12 20:43:40,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3704 to 2243. [2021-06-12 20:43:40,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2243 states, 2242 states have (on average 3.68064228367529) internal successors, (8252), 2242 states have internal predecessors, (8252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:40,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2243 states to 2243 states and 8252 transitions. [2021-06-12 20:43:40,500 INFO L78 Accepts]: Start accepts. Automaton has 2243 states and 8252 transitions. Word has length 24 [2021-06-12 20:43:40,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:40,500 INFO L482 AbstractCegarLoop]: Abstraction has 2243 states and 8252 transitions. [2021-06-12 20:43:40,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:40,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2243 states and 8252 transitions. [2021-06-12 20:43:40,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:43:40,503 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:40,503 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:40,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-06-12 20:43:40,704 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:43:40,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:40,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1759585324, now seen corresponding path program 138 times [2021-06-12 20:43:40,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:40,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960801919] [2021-06-12 20:43:40,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:40,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:40,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:40,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:40,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960801919] [2021-06-12 20:43:40,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960801919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:40,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652300522] [2021-06-12 20:43:40,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:40,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:43:40,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:40,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:43:40,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:41,023 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:41,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-12 20:43:41,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:41,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:41,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:41,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:27 [2021-06-12 20:43:41,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:41,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652300522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:41,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:41,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:43:41,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63589813] [2021-06-12 20:43:41,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:43:41,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:41,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:43:41,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:43:41,099 INFO L87 Difference]: Start difference. First operand 2243 states and 8252 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:44,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:44,047 INFO L93 Difference]: Finished difference Result 3686 states and 12714 transitions. [2021-06-12 20:43:44,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-12 20:43:44,047 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:43:44,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:44,052 INFO L225 Difference]: With dead ends: 3686 [2021-06-12 20:43:44,053 INFO L226 Difference]: Without dead ends: 3656 [2021-06-12 20:43:44,053 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 2519.4ms TimeCoverageRelationStatistics Valid=1095, Invalid=5067, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 20:43:44,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3656 states. [2021-06-12 20:43:44,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3656 to 2245. [2021-06-12 20:43:44,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2244 states have (on average 3.679590017825312) internal successors, (8257), 2244 states have internal predecessors, (8257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:44,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 8257 transitions. [2021-06-12 20:43:44,087 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 8257 transitions. Word has length 24 [2021-06-12 20:43:44,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:44,087 INFO L482 AbstractCegarLoop]: Abstraction has 2245 states and 8257 transitions. [2021-06-12 20:43:44,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:44,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 8257 transitions. [2021-06-12 20:43:44,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:43:44,090 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:44,090 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:44,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable488,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:44,290 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:43:44,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:44,291 INFO L82 PathProgramCache]: Analyzing trace with hash -73841202, now seen corresponding path program 139 times [2021-06-12 20:43:44,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:44,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671694853] [2021-06-12 20:43:44,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:44,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:44,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:44,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671694853] [2021-06-12 20:43:44,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671694853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:44,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358224994] [2021-06-12 20:43:44,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:44,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:44,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:43:44,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:44,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:43:44,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:44,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:44,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:44,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:43:44,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:44,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358224994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:44,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:44,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:43:44,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887807265] [2021-06-12 20:43:44,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:43:44,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:44,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:43:44,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:43:44,637 INFO L87 Difference]: Start difference. First operand 2245 states and 8257 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:46,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:46,759 INFO L93 Difference]: Finished difference Result 3537 states and 12238 transitions. [2021-06-12 20:43:46,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 20:43:46,759 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:43:46,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:46,764 INFO L225 Difference]: With dead ends: 3537 [2021-06-12 20:43:46,764 INFO L226 Difference]: Without dead ends: 3502 [2021-06-12 20:43:46,764 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1335 ImplicationChecksByTransitivity, 1704.8ms TimeCoverageRelationStatistics Valid=777, Invalid=3383, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 20:43:46,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3502 states. [2021-06-12 20:43:46,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3502 to 2223. [2021-06-12 20:43:46,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2223 states, 2222 states have (on average 3.6665166516651664) internal successors, (8147), 2222 states have internal predecessors, (8147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:46,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 8147 transitions. [2021-06-12 20:43:46,797 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 8147 transitions. Word has length 24 [2021-06-12 20:43:46,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:46,797 INFO L482 AbstractCegarLoop]: Abstraction has 2223 states and 8147 transitions. [2021-06-12 20:43:46,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:46,797 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 8147 transitions. [2021-06-12 20:43:46,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:43:46,800 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:46,800 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:47,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:47,000 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:43:47,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:47,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1816560186, now seen corresponding path program 140 times [2021-06-12 20:43:47,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:47,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053484309] [2021-06-12 20:43:47,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:47,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:47,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:47,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:47,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053484309] [2021-06-12 20:43:47,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053484309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:47,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106854317] [2021-06-12 20:43:47,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:47,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:43:47,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:47,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:43:47,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:47,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:43:47,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:43:47,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:43:47,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:47,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:47,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:47,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 20:43:47,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:47,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106854317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:47,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:47,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:43:47,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406762755] [2021-06-12 20:43:47,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:43:47,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:47,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:43:47,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:43:47,459 INFO L87 Difference]: Start difference. First operand 2223 states and 8147 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:47,730 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-06-12 20:43:48,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:48,702 INFO L93 Difference]: Finished difference Result 2779 states and 9798 transitions. [2021-06-12 20:43:48,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:43:48,702 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:43:48,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:48,706 INFO L225 Difference]: With dead ends: 2779 [2021-06-12 20:43:48,706 INFO L226 Difference]: Without dead ends: 2729 [2021-06-12 20:43:48,707 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1074.8ms TimeCoverageRelationStatistics Valid=288, Invalid=1692, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:43:48,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2021-06-12 20:43:48,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 2227. [2021-06-12 20:43:48,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2227 states, 2226 states have (on average 3.665768194070081) internal successors, (8160), 2226 states have internal predecessors, (8160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:48,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 8160 transitions. [2021-06-12 20:43:48,735 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 8160 transitions. Word has length 24 [2021-06-12 20:43:48,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:48,735 INFO L482 AbstractCegarLoop]: Abstraction has 2227 states and 8160 transitions. [2021-06-12 20:43:48,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:48,735 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 8160 transitions. [2021-06-12 20:43:48,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:43:48,738 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:48,738 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:48,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:48,952 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:43:48,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:48,952 INFO L82 PathProgramCache]: Analyzing trace with hash -749735364, now seen corresponding path program 141 times [2021-06-12 20:43:48,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:48,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692981983] [2021-06-12 20:43:48,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:48,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:49,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:49,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:49,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692981983] [2021-06-12 20:43:49,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692981983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:49,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642881555] [2021-06-12 20:43:49,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:49,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:43:49,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:49,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:43:49,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:49,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:49,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-12 20:43:49,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:49,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:49,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:49,367 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-12 20:43:49,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:49,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642881555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:49,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:49,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:43:49,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078679256] [2021-06-12 20:43:49,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:43:49,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:49,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:43:49,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:43:49,426 INFO L87 Difference]: Start difference. First operand 2227 states and 8160 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:49,702 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-06-12 20:43:51,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:51,231 INFO L93 Difference]: Finished difference Result 2773 states and 9806 transitions. [2021-06-12 20:43:51,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 20:43:51,231 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:43:51,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:51,235 INFO L225 Difference]: With dead ends: 2773 [2021-06-12 20:43:51,235 INFO L226 Difference]: Without dead ends: 2737 [2021-06-12 20:43:51,235 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 1548.4ms TimeCoverageRelationStatistics Valid=441, Invalid=2421, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 20:43:51,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2737 states. [2021-06-12 20:43:51,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2737 to 2230. [2021-06-12 20:43:51,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2229 states have (on average 3.665320771646478) internal successors, (8170), 2229 states have internal predecessors, (8170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:51,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 8170 transitions. [2021-06-12 20:43:51,263 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 8170 transitions. Word has length 24 [2021-06-12 20:43:51,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:51,263 INFO L482 AbstractCegarLoop]: Abstraction has 2230 states and 8170 transitions. [2021-06-12 20:43:51,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:51,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 8170 transitions. [2021-06-12 20:43:51,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:43:51,266 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:51,266 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:51,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:51,473 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:43:51,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:51,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1777885224, now seen corresponding path program 142 times [2021-06-12 20:43:51,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:51,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057467457] [2021-06-12 20:43:51,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:51,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:51,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:51,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:51,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057467457] [2021-06-12 20:43:51,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057467457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:51,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940349786] [2021-06-12 20:43:51,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:51,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:43:51,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:51,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:43:51,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:51,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:43:51,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:51,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:51,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:51,804 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:43:51,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:51,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940349786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:51,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:51,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:43:51,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101526209] [2021-06-12 20:43:51,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:43:51,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:51,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:43:51,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:43:51,854 INFO L87 Difference]: Start difference. First operand 2230 states and 8170 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:52,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:52,892 INFO L93 Difference]: Finished difference Result 2693 states and 9594 transitions. [2021-06-12 20:43:52,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:43:52,893 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:43:52,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:52,896 INFO L225 Difference]: With dead ends: 2693 [2021-06-12 20:43:52,896 INFO L226 Difference]: Without dead ends: 2667 [2021-06-12 20:43:52,897 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 899.2ms TimeCoverageRelationStatistics Valid=286, Invalid=1354, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:43:52,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2667 states. [2021-06-12 20:43:52,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2667 to 2235. [2021-06-12 20:43:52,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2235 states, 2234 states have (on average 3.6638316920322294) internal successors, (8185), 2234 states have internal predecessors, (8185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:52,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2235 states to 2235 states and 8185 transitions. [2021-06-12 20:43:52,945 INFO L78 Accepts]: Start accepts. Automaton has 2235 states and 8185 transitions. Word has length 24 [2021-06-12 20:43:52,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:52,945 INFO L482 AbstractCegarLoop]: Abstraction has 2235 states and 8185 transitions. [2021-06-12 20:43:52,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:52,945 INFO L276 IsEmpty]: Start isEmpty. Operand 2235 states and 8185 transitions. [2021-06-12 20:43:52,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:43:52,948 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:52,948 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:53,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-06-12 20:43:53,163 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:43:53,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:53,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1454299046, now seen corresponding path program 143 times [2021-06-12 20:43:53,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:53,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284104155] [2021-06-12 20:43:53,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:53,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:53,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:53,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:53,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284104155] [2021-06-12 20:43:53,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284104155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:53,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716900139] [2021-06-12 20:43:53,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:53,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:43:53,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:53,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:43:53,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:53,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:43:53,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:53,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:53,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:53,464 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:43:53,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:53,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716900139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:53,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:53,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:43:53,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630935846] [2021-06-12 20:43:53,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:43:53,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:53,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:43:53,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:43:53,508 INFO L87 Difference]: Start difference. First operand 2235 states and 8185 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:54,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:54,565 INFO L93 Difference]: Finished difference Result 2644 states and 9457 transitions. [2021-06-12 20:43:54,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:43:54,566 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:43:54,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:54,569 INFO L225 Difference]: With dead ends: 2644 [2021-06-12 20:43:54,569 INFO L226 Difference]: Without dead ends: 2619 [2021-06-12 20:43:54,569 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 887.3ms TimeCoverageRelationStatistics Valid=271, Invalid=1369, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:43:54,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2619 states. [2021-06-12 20:43:54,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2619 to 2228. [2021-06-12 20:43:54,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2227 states have (on average 3.666367310282892) internal successors, (8165), 2227 states have internal predecessors, (8165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:54,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 8165 transitions. [2021-06-12 20:43:54,594 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 8165 transitions. Word has length 24 [2021-06-12 20:43:54,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:54,594 INFO L482 AbstractCegarLoop]: Abstraction has 2228 states and 8165 transitions. [2021-06-12 20:43:54,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:54,594 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 8165 transitions. [2021-06-12 20:43:54,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:43:54,596 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:54,596 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:54,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-06-12 20:43:54,797 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:43:54,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:54,797 INFO L82 PathProgramCache]: Analyzing trace with hash -455428470, now seen corresponding path program 144 times [2021-06-12 20:43:54,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:54,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770513917] [2021-06-12 20:43:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:54,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:54,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:54,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:54,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770513917] [2021-06-12 20:43:54,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770513917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:54,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020854089] [2021-06-12 20:43:54,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:55,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:43:55,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:55,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:43:55,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:55,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:43:55,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:43:55,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:43:55,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:55,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:55,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:55,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 20:43:55,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:55,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020854089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:55,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:55,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:43:55,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579357225] [2021-06-12 20:43:55,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:43:55,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:55,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:43:55,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:43:55,252 INFO L87 Difference]: Start difference. First operand 2228 states and 8165 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:55,524 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-06-12 20:43:56,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:56,322 INFO L93 Difference]: Finished difference Result 2746 states and 9710 transitions. [2021-06-12 20:43:56,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:43:56,323 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:43:56,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:56,327 INFO L225 Difference]: With dead ends: 2746 [2021-06-12 20:43:56,327 INFO L226 Difference]: Without dead ends: 2704 [2021-06-12 20:43:56,327 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 920.1ms TimeCoverageRelationStatistics Valid=254, Invalid=1552, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:43:56,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2021-06-12 20:43:56,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2230. [2021-06-12 20:43:56,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2229 states have (on average 3.6657694033198744) internal successors, (8171), 2229 states have internal predecessors, (8171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:56,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 8171 transitions. [2021-06-12 20:43:56,354 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 8171 transitions. Word has length 24 [2021-06-12 20:43:56,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:56,354 INFO L482 AbstractCegarLoop]: Abstraction has 2230 states and 8171 transitions. [2021-06-12 20:43:56,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:56,354 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 8171 transitions. [2021-06-12 20:43:56,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:43:56,356 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:56,357 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:56,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-06-12 20:43:56,557 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:43:56,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:56,557 INFO L82 PathProgramCache]: Analyzing trace with hash 808869012, now seen corresponding path program 145 times [2021-06-12 20:43:56,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:56,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535393757] [2021-06-12 20:43:56,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:56,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:56,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:56,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535393757] [2021-06-12 20:43:56,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535393757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:56,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911641662] [2021-06-12 20:43:56,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:56,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:56,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:43:56,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:56,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:43:56,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:56,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:56,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:56,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:43:56,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:56,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911641662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:56,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:56,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:43:56,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3360630] [2021-06-12 20:43:56,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:43:56,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:56,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:43:56,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:43:56,981 INFO L87 Difference]: Start difference. First operand 2230 states and 8171 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:57,215 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-06-12 20:43:58,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:43:58,052 INFO L93 Difference]: Finished difference Result 2749 states and 9747 transitions. [2021-06-12 20:43:58,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:43:58,052 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:43:58,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:43:58,056 INFO L225 Difference]: With dead ends: 2749 [2021-06-12 20:43:58,056 INFO L226 Difference]: Without dead ends: 2723 [2021-06-12 20:43:58,056 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 948.4ms TimeCoverageRelationStatistics Valid=275, Invalid=1531, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:43:58,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2723 states. [2021-06-12 20:43:58,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2723 to 2232. [2021-06-12 20:43:58,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 2231 states have (on average 3.665172568354998) internal successors, (8177), 2231 states have internal predecessors, (8177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:58,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 8177 transitions. [2021-06-12 20:43:58,083 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 8177 transitions. Word has length 24 [2021-06-12 20:43:58,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:43:58,083 INFO L482 AbstractCegarLoop]: Abstraction has 2232 states and 8177 transitions. [2021-06-12 20:43:58,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:58,083 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 8177 transitions. [2021-06-12 20:43:58,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:43:58,085 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:43:58,085 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:43:58,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-12 20:43:58,286 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:43:58,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:43:58,286 INFO L82 PathProgramCache]: Analyzing trace with hash 632327580, now seen corresponding path program 146 times [2021-06-12 20:43:58,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:43:58,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713447231] [2021-06-12 20:43:58,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:43:58,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:43:58,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:58,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:43:58,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713447231] [2021-06-12 20:43:58,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713447231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:58,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334872330] [2021-06-12 20:43:58,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:43:58,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:43:58,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:43:58,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:43:58,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:43:58,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:58,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:43:58,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:43:58,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:43:58,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:43:58,625 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:43:58,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:43:58,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334872330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:43:58,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:43:58,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:43:58,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057197714] [2021-06-12 20:43:58,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:43:58,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:43:58,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:43:58,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:43:58,714 INFO L87 Difference]: Start difference. First operand 2232 states and 8177 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:43:59,009 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-06-12 20:44:00,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:00,547 INFO L93 Difference]: Finished difference Result 2814 states and 9921 transitions. [2021-06-12 20:44:00,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 20:44:00,547 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:44:00,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:00,551 INFO L225 Difference]: With dead ends: 2814 [2021-06-12 20:44:00,551 INFO L226 Difference]: Without dead ends: 2778 [2021-06-12 20:44:00,551 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1510.6ms TimeCoverageRelationStatistics Valid=503, Invalid=2577, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 20:44:00,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2778 states. [2021-06-12 20:44:00,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2778 to 2233. [2021-06-12 20:44:00,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2233 states, 2232 states have (on average 3.6657706093189963) internal successors, (8182), 2232 states have internal predecessors, (8182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:00,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 8182 transitions. [2021-06-12 20:44:00,581 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 8182 transitions. Word has length 24 [2021-06-12 20:44:00,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:00,581 INFO L482 AbstractCegarLoop]: Abstraction has 2233 states and 8182 transitions. [2021-06-12 20:44:00,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:00,581 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 8182 transitions. [2021-06-12 20:44:00,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:44:00,584 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:00,584 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:00,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:00,784 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:44:00,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:00,785 INFO L82 PathProgramCache]: Analyzing trace with hash -201410860, now seen corresponding path program 147 times [2021-06-12 20:44:00,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:00,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95897527] [2021-06-12 20:44:00,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:00,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:00,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:00,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95897527] [2021-06-12 20:44:00,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95897527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:00,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272957585] [2021-06-12 20:44:00,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:00,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:44:00,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:00,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:44:00,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:01,096 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:01,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:44:01,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:01,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:01,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:01,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:44:01,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:01,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272957585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:01,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:01,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:44:01,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042433582] [2021-06-12 20:44:01,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:44:01,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:01,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:44:01,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:44:01,198 INFO L87 Difference]: Start difference. First operand 2233 states and 8182 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:01,470 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-06-12 20:44:02,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:02,704 INFO L93 Difference]: Finished difference Result 2807 states and 9852 transitions. [2021-06-12 20:44:02,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 20:44:02,704 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:44:02,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:02,708 INFO L225 Difference]: With dead ends: 2807 [2021-06-12 20:44:02,708 INFO L226 Difference]: Without dead ends: 2779 [2021-06-12 20:44:02,708 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1308.0ms TimeCoverageRelationStatistics Valid=358, Invalid=2092, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:44:02,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2779 states. [2021-06-12 20:44:02,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2779 to 2234. [2021-06-12 20:44:02,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 2233 states have (on average 3.667263770712047) internal successors, (8189), 2233 states have internal predecessors, (8189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:02,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 8189 transitions. [2021-06-12 20:44:02,736 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 8189 transitions. Word has length 24 [2021-06-12 20:44:02,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:02,736 INFO L482 AbstractCegarLoop]: Abstraction has 2234 states and 8189 transitions. [2021-06-12 20:44:02,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:02,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 8189 transitions. [2021-06-12 20:44:02,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:44:02,739 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:02,739 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:02,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-06-12 20:44:02,939 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:44:02,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:02,939 INFO L82 PathProgramCache]: Analyzing trace with hash 580422940, now seen corresponding path program 148 times [2021-06-12 20:44:02,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:02,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380704459] [2021-06-12 20:44:02,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:02,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:03,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:03,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:03,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380704459] [2021-06-12 20:44:03,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380704459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:03,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843165472] [2021-06-12 20:44:03,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:03,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:44:03,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:03,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:44:03,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:03,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:44:03,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:03,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:03,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:03,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:44:03,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:03,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843165472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:03,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:03,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:44:03,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270452412] [2021-06-12 20:44:03,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:44:03,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:03,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:44:03,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:44:03,298 INFO L87 Difference]: Start difference. First operand 2234 states and 8189 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:03,535 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-06-12 20:44:04,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:04,247 INFO L93 Difference]: Finished difference Result 2654 states and 9469 transitions. [2021-06-12 20:44:04,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:44:04,247 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:44:04,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:04,250 INFO L225 Difference]: With dead ends: 2654 [2021-06-12 20:44:04,250 INFO L226 Difference]: Without dead ends: 2640 [2021-06-12 20:44:04,251 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 843.9ms TimeCoverageRelationStatistics Valid=231, Invalid=1329, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:44:04,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2021-06-12 20:44:04,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 2233. [2021-06-12 20:44:04,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2233 states, 2232 states have (on average 3.668010752688172) internal successors, (8187), 2232 states have internal predecessors, (8187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:04,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 8187 transitions. [2021-06-12 20:44:04,275 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 8187 transitions. Word has length 24 [2021-06-12 20:44:04,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:04,276 INFO L482 AbstractCegarLoop]: Abstraction has 2233 states and 8187 transitions. [2021-06-12 20:44:04,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:04,276 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 8187 transitions. [2021-06-12 20:44:04,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:44:04,278 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:04,278 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:04,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable506 [2021-06-12 20:44:04,479 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:44:04,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:04,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1802814956, now seen corresponding path program 149 times [2021-06-12 20:44:04,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:04,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138315250] [2021-06-12 20:44:04,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:04,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:04,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:04,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:04,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138315250] [2021-06-12 20:44:04,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138315250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:04,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119124963] [2021-06-12 20:44:04,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:04,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:44:04,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:04,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:44:04,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:04,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:44:04,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:04,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:04,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:04,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:44:04,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:04,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119124963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:04,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:04,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:44:04,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212659207] [2021-06-12 20:44:04,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:44:04,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:04,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:44:04,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:44:04,876 INFO L87 Difference]: Start difference. First operand 2233 states and 8187 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:05,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:05,988 INFO L93 Difference]: Finished difference Result 2750 states and 9744 transitions. [2021-06-12 20:44:05,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:44:05,988 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:44:05,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:05,992 INFO L225 Difference]: With dead ends: 2750 [2021-06-12 20:44:05,992 INFO L226 Difference]: Without dead ends: 2714 [2021-06-12 20:44:05,992 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 988.0ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:44:05,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2021-06-12 20:44:06,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 2238. [2021-06-12 20:44:06,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2238 states, 2237 states have (on average 3.6678587393831026) internal successors, (8205), 2237 states have internal predecessors, (8205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:06,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2238 states to 2238 states and 8205 transitions. [2021-06-12 20:44:06,019 INFO L78 Accepts]: Start accepts. Automaton has 2238 states and 8205 transitions. Word has length 24 [2021-06-12 20:44:06,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:06,019 INFO L482 AbstractCegarLoop]: Abstraction has 2238 states and 8205 transitions. [2021-06-12 20:44:06,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:06,019 INFO L276 IsEmpty]: Start isEmpty. Operand 2238 states and 8205 transitions. [2021-06-12 20:44:06,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:44:06,021 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:06,021 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:06,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable507,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:06,222 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:44:06,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:06,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1464002480, now seen corresponding path program 150 times [2021-06-12 20:44:06,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:06,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500454522] [2021-06-12 20:44:06,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:06,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:06,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:06,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:06,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500454522] [2021-06-12 20:44:06,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500454522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:06,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916307855] [2021-06-12 20:44:06,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:06,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:44:06,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:06,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:44:06,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:06,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:06,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:44:06,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:06,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:06,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:06,537 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:44:06,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:06,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916307855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:06,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:06,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:44:06,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221248833] [2021-06-12 20:44:06,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:44:06,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:06,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:44:06,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:44:06,632 INFO L87 Difference]: Start difference. First operand 2238 states and 8205 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:06,856 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-06-12 20:44:07,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:07,867 INFO L93 Difference]: Finished difference Result 2707 states and 9616 transitions. [2021-06-12 20:44:07,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:44:07,867 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:44:07,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:07,871 INFO L225 Difference]: With dead ends: 2707 [2021-06-12 20:44:07,871 INFO L226 Difference]: Without dead ends: 2671 [2021-06-12 20:44:07,871 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1185.6ms TimeCoverageRelationStatistics Valid=380, Invalid=1876, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:44:07,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2671 states. [2021-06-12 20:44:07,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2671 to 2243. [2021-06-12 20:44:07,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2243 states, 2242 states have (on average 3.6663693131132917) internal successors, (8220), 2242 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:07,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2243 states to 2243 states and 8220 transitions. [2021-06-12 20:44:07,898 INFO L78 Accepts]: Start accepts. Automaton has 2243 states and 8220 transitions. Word has length 24 [2021-06-12 20:44:07,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:07,898 INFO L482 AbstractCegarLoop]: Abstraction has 2243 states and 8220 transitions. [2021-06-12 20:44:07,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:07,898 INFO L276 IsEmpty]: Start isEmpty. Operand 2243 states and 8220 transitions. [2021-06-12 20:44:07,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:44:07,900 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:07,900 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:08,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,266 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:08,101 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:44:08,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:08,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1787588658, now seen corresponding path program 151 times [2021-06-12 20:44:08,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:08,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952374687] [2021-06-12 20:44:08,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:08,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:08,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:08,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:08,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952374687] [2021-06-12 20:44:08,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952374687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:08,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746291120] [2021-06-12 20:44:08,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:08,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:08,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:44:08,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:08,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:44:08,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:08,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:08,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:08,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:44:08,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:08,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746291120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:08,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:08,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:44:08,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426392613] [2021-06-12 20:44:08,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:44:08,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:08,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:44:08,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:44:08,441 INFO L87 Difference]: Start difference. First operand 2243 states and 8220 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:09,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:09,309 INFO L93 Difference]: Finished difference Result 2641 states and 9458 transitions. [2021-06-12 20:44:09,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:44:09,309 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:44:09,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:09,313 INFO L225 Difference]: With dead ends: 2641 [2021-06-12 20:44:09,313 INFO L226 Difference]: Without dead ends: 2616 [2021-06-12 20:44:09,313 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 765.4ms TimeCoverageRelationStatistics Valid=239, Invalid=1167, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:44:09,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-06-12 20:44:09,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 2236. [2021-06-12 20:44:09,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2236 states, 2235 states have (on average 3.668456375838926) internal successors, (8199), 2235 states have internal predecessors, (8199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:09,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2236 states to 2236 states and 8199 transitions. [2021-06-12 20:44:09,340 INFO L78 Accepts]: Start accepts. Automaton has 2236 states and 8199 transitions. Word has length 24 [2021-06-12 20:44:09,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:09,340 INFO L482 AbstractCegarLoop]: Abstraction has 2236 states and 8199 transitions. [2021-06-12 20:44:09,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:09,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2236 states and 8199 transitions. [2021-06-12 20:44:09,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:44:09,343 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:09,343 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:09,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable511,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:09,543 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:44:09,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:09,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1183368252, now seen corresponding path program 152 times [2021-06-12 20:44:09,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:09,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828274843] [2021-06-12 20:44:09,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:09,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:09,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:09,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:09,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828274843] [2021-06-12 20:44:09,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828274843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:09,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326557737] [2021-06-12 20:44:09,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:09,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:44:09,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:09,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:44:09,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:09,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:44:09,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:44:09,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:44:09,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:09,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:09,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:09,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 20:44:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:09,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326557737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:09,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:09,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:44:09,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513263183] [2021-06-12 20:44:09,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:44:09,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:09,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:44:09,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:44:09,992 INFO L87 Difference]: Start difference. First operand 2236 states and 8199 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:10,285 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2021-06-12 20:44:11,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:11,152 INFO L93 Difference]: Finished difference Result 2732 states and 9669 transitions. [2021-06-12 20:44:11,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:44:11,153 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:44:11,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:11,157 INFO L225 Difference]: With dead ends: 2732 [2021-06-12 20:44:11,157 INFO L226 Difference]: Without dead ends: 2680 [2021-06-12 20:44:11,158 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 918.9ms TimeCoverageRelationStatistics Valid=258, Invalid=1548, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:44:11,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-06-12 20:44:11,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2238. [2021-06-12 20:44:11,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2238 states, 2237 states have (on average 3.6678587393831026) internal successors, (8205), 2237 states have internal predecessors, (8205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:11,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2238 states to 2238 states and 8205 transitions. [2021-06-12 20:44:11,187 INFO L78 Accepts]: Start accepts. Automaton has 2238 states and 8205 transitions. Word has length 24 [2021-06-12 20:44:11,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:11,187 INFO L482 AbstractCegarLoop]: Abstraction has 2238 states and 8205 transitions. [2021-06-12 20:44:11,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:11,187 INFO L276 IsEmpty]: Start isEmpty. Operand 2238 states and 8205 transitions. [2021-06-12 20:44:11,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:44:11,190 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:11,190 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:11,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-06-12 20:44:11,390 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:44:11,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:11,391 INFO L82 PathProgramCache]: Analyzing trace with hash -965943366, now seen corresponding path program 153 times [2021-06-12 20:44:11,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:11,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656550493] [2021-06-12 20:44:11,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:11,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:11,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:11,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:11,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656550493] [2021-06-12 20:44:11,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656550493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:11,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189498176] [2021-06-12 20:44:11,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:11,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:44:11,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:11,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:44:11,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:11,712 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:11,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:44:11,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:11,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:11,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:11,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:44:11,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:11,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189498176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:11,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:11,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:44:11,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050613096] [2021-06-12 20:44:11,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:44:11,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:11,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:44:11,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:44:11,802 INFO L87 Difference]: Start difference. First operand 2238 states and 8205 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:12,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:12,898 INFO L93 Difference]: Finished difference Result 2712 states and 9639 transitions. [2021-06-12 20:44:12,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:44:12,898 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:44:12,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:12,901 INFO L225 Difference]: With dead ends: 2712 [2021-06-12 20:44:12,901 INFO L226 Difference]: Without dead ends: 2677 [2021-06-12 20:44:12,901 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 915.0ms TimeCoverageRelationStatistics Valid=281, Invalid=1699, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:44:12,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-12 20:44:12,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 2240. [2021-06-12 20:44:12,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 3.6677087985707906) internal successors, (8212), 2239 states have internal predecessors, (8212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:12,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 8212 transitions. [2021-06-12 20:44:12,926 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 8212 transitions. Word has length 24 [2021-06-12 20:44:12,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:12,926 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 8212 transitions. [2021-06-12 20:44:12,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:12,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 8212 transitions. [2021-06-12 20:44:12,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:44:12,929 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:12,929 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:13,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-06-12 20:44:13,129 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:44:13,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:13,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1799681806, now seen corresponding path program 154 times [2021-06-12 20:44:13,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:13,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481116926] [2021-06-12 20:44:13,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:13,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:13,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:13,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481116926] [2021-06-12 20:44:13,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481116926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:13,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477558846] [2021-06-12 20:44:13,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:13,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:44:13,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:13,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:44:13,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:13,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:44:13,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:13,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:13,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:13,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:44:13,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:13,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477558846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:13,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:13,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:44:13,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9015954] [2021-06-12 20:44:13,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:44:13,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:13,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:44:13,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:44:13,478 INFO L87 Difference]: Start difference. First operand 2240 states and 8212 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:14,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:14,413 INFO L93 Difference]: Finished difference Result 2727 states and 9699 transitions. [2021-06-12 20:44:14,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:44:14,413 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:44:14,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:14,417 INFO L225 Difference]: With dead ends: 2727 [2021-06-12 20:44:14,417 INFO L226 Difference]: Without dead ends: 2703 [2021-06-12 20:44:14,417 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 823.8ms TimeCoverageRelationStatistics Valid=283, Invalid=1523, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:44:14,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2703 states. [2021-06-12 20:44:14,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2703 to 2237. [2021-06-12 20:44:14,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 2236 states have (on average 3.6686046511627906) internal successors, (8203), 2236 states have internal predecessors, (8203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:14,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 8203 transitions. [2021-06-12 20:44:14,443 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 8203 transitions. Word has length 24 [2021-06-12 20:44:14,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:14,443 INFO L482 AbstractCegarLoop]: Abstraction has 2237 states and 8203 transitions. [2021-06-12 20:44:14,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:14,443 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 8203 transitions. [2021-06-12 20:44:14,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:44:14,446 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:14,446 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:14,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:14,646 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:44:14,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:14,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1662660090, now seen corresponding path program 155 times [2021-06-12 20:44:14,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:14,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749595721] [2021-06-12 20:44:14,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:14,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:14,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:14,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749595721] [2021-06-12 20:44:14,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749595721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:14,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452333503] [2021-06-12 20:44:14,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:14,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:44:14,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:14,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:44:14,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:14,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:44:14,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:14,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:14,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:14,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:44:14,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:14,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452333503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:14,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:14,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:44:14,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926783148] [2021-06-12 20:44:14,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:44:14,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:14,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:44:14,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:44:14,977 INFO L87 Difference]: Start difference. First operand 2237 states and 8203 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:15,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:15,934 INFO L93 Difference]: Finished difference Result 2663 states and 9503 transitions. [2021-06-12 20:44:15,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:44:15,934 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:44:15,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:15,938 INFO L225 Difference]: With dead ends: 2663 [2021-06-12 20:44:15,938 INFO L226 Difference]: Without dead ends: 2637 [2021-06-12 20:44:15,938 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 794.8ms TimeCoverageRelationStatistics Valid=272, Invalid=1368, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:44:15,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2021-06-12 20:44:15,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 2241. [2021-06-12 20:44:15,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 2240 states have (on average 3.6669642857142857) internal successors, (8214), 2240 states have internal predecessors, (8214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:15,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 8214 transitions. [2021-06-12 20:44:15,964 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 8214 transitions. Word has length 24 [2021-06-12 20:44:15,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:15,964 INFO L482 AbstractCegarLoop]: Abstraction has 2241 states and 8214 transitions. [2021-06-12 20:44:15,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:15,964 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 8214 transitions. [2021-06-12 20:44:15,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:44:15,967 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:15,967 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:16,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable516,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:16,167 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:44:16,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:16,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1986246268, now seen corresponding path program 156 times [2021-06-12 20:44:16,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:16,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025148520] [2021-06-12 20:44:16,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:16,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:16,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:16,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025148520] [2021-06-12 20:44:16,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025148520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:16,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161008900] [2021-06-12 20:44:16,315 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:16,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:44:16,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:16,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:44:16,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:16,455 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:16,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:44:16,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:16,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:16,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:16,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-12 20:44:16,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:16,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161008900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:16,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:16,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:44:16,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553096539] [2021-06-12 20:44:16,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:44:16,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:16,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:44:16,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:44:16,577 INFO L87 Difference]: Start difference. First operand 2241 states and 8214 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:16,837 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2021-06-12 20:44:17,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:17,871 INFO L93 Difference]: Finished difference Result 2693 states and 9554 transitions. [2021-06-12 20:44:17,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:44:17,872 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:44:17,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:17,875 INFO L225 Difference]: With dead ends: 2693 [2021-06-12 20:44:17,875 INFO L226 Difference]: Without dead ends: 2665 [2021-06-12 20:44:17,876 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1152.7ms TimeCoverageRelationStatistics Valid=352, Invalid=1718, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:44:17,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2021-06-12 20:44:17,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 2248. [2021-06-12 20:44:17,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2248 states, 2247 states have (on average 3.6653315531820203) internal successors, (8236), 2247 states have internal predecessors, (8236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:17,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2248 states to 2248 states and 8236 transitions. [2021-06-12 20:44:17,902 INFO L78 Accepts]: Start accepts. Automaton has 2248 states and 8236 transitions. Word has length 24 [2021-06-12 20:44:17,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:17,902 INFO L482 AbstractCegarLoop]: Abstraction has 2248 states and 8236 transitions. [2021-06-12 20:44:17,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:17,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2248 states and 8236 transitions. [2021-06-12 20:44:17,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:44:17,905 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:17,905 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:18,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:18,106 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:44:18,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:18,106 INFO L82 PathProgramCache]: Analyzing trace with hash -622976906, now seen corresponding path program 157 times [2021-06-12 20:44:18,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:18,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155157357] [2021-06-12 20:44:18,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:18,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:18,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:18,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:18,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155157357] [2021-06-12 20:44:18,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155157357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:18,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757639393] [2021-06-12 20:44:18,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:18,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:18,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:44:18,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:18,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:44:18,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:18,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:18,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:18,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:44:18,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:18,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757639393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:18,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:18,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:44:18,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319885953] [2021-06-12 20:44:18,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:44:18,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:18,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:44:18,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:44:18,427 INFO L87 Difference]: Start difference. First operand 2248 states and 8236 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:19,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:19,241 INFO L93 Difference]: Finished difference Result 2567 states and 9221 transitions. [2021-06-12 20:44:19,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:44:19,242 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:44:19,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:19,245 INFO L225 Difference]: With dead ends: 2567 [2021-06-12 20:44:19,245 INFO L226 Difference]: Without dead ends: 2550 [2021-06-12 20:44:19,245 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 747.8ms TimeCoverageRelationStatistics Valid=220, Invalid=1186, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:44:19,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2550 states. [2021-06-12 20:44:19,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2550 to 2242. [2021-06-12 20:44:19,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 2241 states have (on average 3.6675591253904507) internal successors, (8219), 2241 states have internal predecessors, (8219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:19,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 8219 transitions. [2021-06-12 20:44:19,271 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 8219 transitions. Word has length 24 [2021-06-12 20:44:19,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:19,271 INFO L482 AbstractCegarLoop]: Abstraction has 2242 states and 8219 transitions. [2021-06-12 20:44:19,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:19,271 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 8219 transitions. [2021-06-12 20:44:19,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:44:19,274 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:19,274 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:19,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-06-12 20:44:19,478 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:44:19,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:19,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1959736906, now seen corresponding path program 158 times [2021-06-12 20:44:19,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:19,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392618258] [2021-06-12 20:44:19,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:19,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:19,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:19,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:19,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392618258] [2021-06-12 20:44:19,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392618258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:19,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108824222] [2021-06-12 20:44:19,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:19,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:44:19,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:19,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:44:19,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:19,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:44:19,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:19,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:19,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:19,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:44:19,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:19,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108824222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:19,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:19,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:44:19,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343179375] [2021-06-12 20:44:19,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:44:19,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:19,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:44:19,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:44:19,809 INFO L87 Difference]: Start difference. First operand 2242 states and 8219 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:20,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:20,796 INFO L93 Difference]: Finished difference Result 2691 states and 9584 transitions. [2021-06-12 20:44:20,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:44:20,797 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:44:20,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:20,800 INFO L225 Difference]: With dead ends: 2691 [2021-06-12 20:44:20,801 INFO L226 Difference]: Without dead ends: 2665 [2021-06-12 20:44:20,801 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 781.9ms TimeCoverageRelationStatistics Valid=278, Invalid=1444, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:44:20,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2021-06-12 20:44:20,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 2242. [2021-06-12 20:44:20,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 2241 states have (on average 3.6675591253904507) internal successors, (8219), 2241 states have internal predecessors, (8219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:20,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 8219 transitions. [2021-06-12 20:44:20,827 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 8219 transitions. Word has length 24 [2021-06-12 20:44:20,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:20,827 INFO L482 AbstractCegarLoop]: Abstraction has 2242 states and 8219 transitions. [2021-06-12 20:44:20,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:20,827 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 8219 transitions. [2021-06-12 20:44:20,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:44:20,830 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:20,830 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:21,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-06-12 20:44:21,030 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:44:21,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:21,031 INFO L82 PathProgramCache]: Analyzing trace with hash 168875732, now seen corresponding path program 159 times [2021-06-12 20:44:21,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:21,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353007985] [2021-06-12 20:44:21,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:21,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:21,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:21,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:21,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353007985] [2021-06-12 20:44:21,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353007985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:21,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587779167] [2021-06-12 20:44:21,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:21,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:44:21,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:21,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:44:21,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:21,305 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:21,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:44:21,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:21,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:21,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:21,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-12 20:44:21,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:21,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587779167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:21,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:21,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:44:21,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256905940] [2021-06-12 20:44:21,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:44:21,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:21,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:44:21,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:44:21,438 INFO L87 Difference]: Start difference. First operand 2242 states and 8219 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:21,664 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-06-12 20:44:22,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:22,763 INFO L93 Difference]: Finished difference Result 2763 states and 9734 transitions. [2021-06-12 20:44:22,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:44:22,763 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:44:22,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:22,767 INFO L225 Difference]: With dead ends: 2763 [2021-06-12 20:44:22,767 INFO L226 Difference]: Without dead ends: 2735 [2021-06-12 20:44:22,767 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 1189.7ms TimeCoverageRelationStatistics Valid=380, Invalid=2070, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:44:22,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2735 states. [2021-06-12 20:44:22,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2735 to 2242. [2021-06-12 20:44:22,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 2241 states have (on average 3.6675591253904507) internal successors, (8219), 2241 states have internal predecessors, (8219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:22,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 8219 transitions. [2021-06-12 20:44:22,795 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 8219 transitions. Word has length 24 [2021-06-12 20:44:22,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:22,795 INFO L482 AbstractCegarLoop]: Abstraction has 2242 states and 8219 transitions. [2021-06-12 20:44:22,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:22,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 8219 transitions. [2021-06-12 20:44:22,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:44:22,798 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:22,798 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:22,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:22,998 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:44:22,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:22,998 INFO L82 PathProgramCache]: Analyzing trace with hash 950709532, now seen corresponding path program 160 times [2021-06-12 20:44:22,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:22,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971844816] [2021-06-12 20:44:22,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:23,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:23,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:23,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971844816] [2021-06-12 20:44:23,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971844816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:23,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726401568] [2021-06-12 20:44:23,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:23,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:44:23,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:23,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:44:23,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:23,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:44:23,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:23,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:23,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:23,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:44:23,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:23,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726401568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:23,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:23,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:44:23,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776714134] [2021-06-12 20:44:23,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:44:23,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:23,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:44:23,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:44:23,341 INFO L87 Difference]: Start difference. First operand 2242 states and 8219 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:24,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:24,021 INFO L93 Difference]: Finished difference Result 2600 states and 9316 transitions. [2021-06-12 20:44:24,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:44:24,021 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:44:24,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:24,025 INFO L225 Difference]: With dead ends: 2600 [2021-06-12 20:44:24,025 INFO L226 Difference]: Without dead ends: 2586 [2021-06-12 20:44:24,025 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 629.6ms TimeCoverageRelationStatistics Valid=216, Invalid=1116, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:44:24,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2586 states. [2021-06-12 20:44:24,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2586 to 2242. [2021-06-12 20:44:24,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 2241 states have (on average 3.6675591253904507) internal successors, (8219), 2241 states have internal predecessors, (8219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:24,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 8219 transitions. [2021-06-12 20:44:24,051 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 8219 transitions. Word has length 24 [2021-06-12 20:44:24,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:24,051 INFO L482 AbstractCegarLoop]: Abstraction has 2242 states and 8219 transitions. [2021-06-12 20:44:24,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:24,051 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 8219 transitions. [2021-06-12 20:44:24,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:44:24,054 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:24,054 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:24,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2021-06-12 20:44:24,254 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:44:24,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:24,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1895765076, now seen corresponding path program 161 times [2021-06-12 20:44:24,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:24,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669807573] [2021-06-12 20:44:24,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:24,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:24,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:24,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669807573] [2021-06-12 20:44:24,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669807573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:24,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325822053] [2021-06-12 20:44:24,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:24,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:44:24,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:24,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:44:24,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:24,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:44:24,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:24,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:24,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:24,531 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:44:24,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:24,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325822053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:24,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:24,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:44:24,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918654672] [2021-06-12 20:44:24,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:44:24,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:24,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:44:24,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:44:24,589 INFO L87 Difference]: Start difference. First operand 2242 states and 8219 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:25,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:25,425 INFO L93 Difference]: Finished difference Result 2624 states and 9395 transitions. [2021-06-12 20:44:25,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:44:25,425 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:44:25,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:25,428 INFO L225 Difference]: With dead ends: 2624 [2021-06-12 20:44:25,428 INFO L226 Difference]: Without dead ends: 2601 [2021-06-12 20:44:25,429 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 747.7ms TimeCoverageRelationStatistics Valid=257, Invalid=1383, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:44:25,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-06-12 20:44:25,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2244. [2021-06-12 20:44:25,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2244 states, 2243 states have (on average 3.666518056174766) internal successors, (8224), 2243 states have internal predecessors, (8224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:25,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 8224 transitions. [2021-06-12 20:44:25,454 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 8224 transitions. Word has length 24 [2021-06-12 20:44:25,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:25,455 INFO L482 AbstractCegarLoop]: Abstraction has 2244 states and 8224 transitions. [2021-06-12 20:44:25,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:25,455 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 8224 transitions. [2021-06-12 20:44:25,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:44:25,457 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:25,457 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:25,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:25,658 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:44:25,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:25,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1419787772, now seen corresponding path program 162 times [2021-06-12 20:44:25,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:25,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216084322] [2021-06-12 20:44:25,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:25,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:25,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:25,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216084322] [2021-06-12 20:44:25,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216084322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:25,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69517613] [2021-06-12 20:44:25,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:25,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:44:25,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:25,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:44:25,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:25,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:44:25,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:25,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:25,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:25,926 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:44:25,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:25,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69517613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:25,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:25,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:44:25,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191752361] [2021-06-12 20:44:25,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:44:25,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:25,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:44:25,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:44:25,983 INFO L87 Difference]: Start difference. First operand 2244 states and 8224 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:26,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:26,787 INFO L93 Difference]: Finished difference Result 2641 states and 9443 transitions. [2021-06-12 20:44:26,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:44:26,787 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:44:26,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:26,791 INFO L225 Difference]: With dead ends: 2641 [2021-06-12 20:44:26,791 INFO L226 Difference]: Without dead ends: 2619 [2021-06-12 20:44:26,791 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 688.6ms TimeCoverageRelationStatistics Valid=263, Invalid=1377, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:44:26,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2619 states. [2021-06-12 20:44:26,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2619 to 2243. [2021-06-12 20:44:26,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2243 states, 2242 states have (on average 3.6672613737734165) internal successors, (8222), 2242 states have internal predecessors, (8222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:26,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2243 states to 2243 states and 8222 transitions. [2021-06-12 20:44:26,818 INFO L78 Accepts]: Start accepts. Automaton has 2243 states and 8222 transitions. Word has length 24 [2021-06-12 20:44:26,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:26,818 INFO L482 AbstractCegarLoop]: Abstraction has 2243 states and 8222 transitions. [2021-06-12 20:44:26,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:26,818 INFO L276 IsEmpty]: Start isEmpty. Operand 2243 states and 8222 transitions. [2021-06-12 20:44:26,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:44:26,821 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:26,821 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:27,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable527 [2021-06-12 20:44:27,021 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:44:27,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:27,022 INFO L82 PathProgramCache]: Analyzing trace with hash 613259036, now seen corresponding path program 93 times [2021-06-12 20:44:27,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:27,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595359292] [2021-06-12 20:44:27,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:27,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:27,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:27,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595359292] [2021-06-12 20:44:27,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595359292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:27,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087491554] [2021-06-12 20:44:27,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:27,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:44:27,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:27,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:44:27,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:27,368 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:27,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-12 20:44:27,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:27,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:27,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:27,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-12 20:44:27,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:27,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087491554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:27,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:27,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:44:27,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406818348] [2021-06-12 20:44:27,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:44:27,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:27,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:44:27,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:44:27,437 INFO L87 Difference]: Start difference. First operand 2243 states and 8222 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:28,008 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-06-12 20:44:30,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:30,075 INFO L93 Difference]: Finished difference Result 3179 states and 11053 transitions. [2021-06-12 20:44:30,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 20:44:30,075 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:44:30,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:30,079 INFO L225 Difference]: With dead ends: 3179 [2021-06-12 20:44:30,079 INFO L226 Difference]: Without dead ends: 3088 [2021-06-12 20:44:30,079 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 2243.7ms TimeCoverageRelationStatistics Valid=685, Invalid=4007, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 20:44:30,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3088 states. [2021-06-12 20:44:30,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3088 to 2264. [2021-06-12 20:44:30,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2264 states, 2263 states have (on average 3.664162615996465) internal successors, (8292), 2263 states have internal predecessors, (8292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:30,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2264 states to 2264 states and 8292 transitions. [2021-06-12 20:44:30,108 INFO L78 Accepts]: Start accepts. Automaton has 2264 states and 8292 transitions. Word has length 24 [2021-06-12 20:44:30,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:30,108 INFO L482 AbstractCegarLoop]: Abstraction has 2264 states and 8292 transitions. [2021-06-12 20:44:30,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:30,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2264 states and 8292 transitions. [2021-06-12 20:44:30,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:44:30,111 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:30,111 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:30,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable528,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:30,311 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:44:30,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:30,312 INFO L82 PathProgramCache]: Analyzing trace with hash 830683922, now seen corresponding path program 94 times [2021-06-12 20:44:30,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:30,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380553755] [2021-06-12 20:44:30,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:30,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:30,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:30,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380553755] [2021-06-12 20:44:30,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380553755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:30,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950870733] [2021-06-12 20:44:30,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:30,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:44:30,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:30,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:44:30,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:30,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:44:30,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:30,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:30,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:30,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:44:30,642 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:30,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950870733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:30,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:30,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:44:30,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178374301] [2021-06-12 20:44:30,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:44:30,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:30,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:44:30,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:44:30,643 INFO L87 Difference]: Start difference. First operand 2264 states and 8292 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:32,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:32,538 INFO L93 Difference]: Finished difference Result 2991 states and 10538 transitions. [2021-06-12 20:44:32,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 20:44:32,538 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:44:32,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:32,542 INFO L225 Difference]: With dead ends: 2991 [2021-06-12 20:44:32,542 INFO L226 Difference]: Without dead ends: 2941 [2021-06-12 20:44:32,542 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 1661.0ms TimeCoverageRelationStatistics Valid=596, Invalid=2596, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 20:44:32,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2941 states. [2021-06-12 20:44:32,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2941 to 2278. [2021-06-12 20:44:32,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2278 states, 2277 states have (on average 3.6644707949055775) internal successors, (8344), 2277 states have internal predecessors, (8344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:32,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 8344 transitions. [2021-06-12 20:44:32,570 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 8344 transitions. Word has length 24 [2021-06-12 20:44:32,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:32,570 INFO L482 AbstractCegarLoop]: Abstraction has 2278 states and 8344 transitions. [2021-06-12 20:44:32,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:32,570 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 8344 transitions. [2021-06-12 20:44:32,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:44:32,572 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:32,572 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:32,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-06-12 20:44:32,773 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:44:32,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:32,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1255427878, now seen corresponding path program 163 times [2021-06-12 20:44:32,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:32,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741060905] [2021-06-12 20:44:32,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:32,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:32,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:32,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:32,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741060905] [2021-06-12 20:44:32,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741060905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:32,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48806110] [2021-06-12 20:44:32,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:32,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:32,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:44:32,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:33,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:44:33,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:33,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:33,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:33,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:44:33,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:33,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48806110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:33,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:33,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:44:33,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929637167] [2021-06-12 20:44:33,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:44:33,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:33,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:44:33,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:44:33,147 INFO L87 Difference]: Start difference. First operand 2278 states and 8344 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:35,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:35,661 INFO L93 Difference]: Finished difference Result 3202 states and 11156 transitions. [2021-06-12 20:44:35,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 20:44:35,662 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:44:35,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:35,666 INFO L225 Difference]: With dead ends: 3202 [2021-06-12 20:44:35,666 INFO L226 Difference]: Without dead ends: 3150 [2021-06-12 20:44:35,666 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 2082.6ms TimeCoverageRelationStatistics Valid=736, Invalid=3820, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 20:44:35,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3150 states. [2021-06-12 20:44:35,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3150 to 2284. [2021-06-12 20:44:35,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 2283 states have (on average 3.6649145860709593) internal successors, (8367), 2283 states have internal predecessors, (8367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:35,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 8367 transitions. [2021-06-12 20:44:35,695 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 8367 transitions. Word has length 24 [2021-06-12 20:44:35,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:35,695 INFO L482 AbstractCegarLoop]: Abstraction has 2284 states and 8367 transitions. [2021-06-12 20:44:35,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:35,695 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 8367 transitions. [2021-06-12 20:44:35,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:44:35,698 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:35,698 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:35,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-06-12 20:44:35,898 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:44:35,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:35,899 INFO L82 PathProgramCache]: Analyzing trace with hash 227278018, now seen corresponding path program 164 times [2021-06-12 20:44:35,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:35,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562170893] [2021-06-12 20:44:35,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:36,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:36,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562170893] [2021-06-12 20:44:36,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562170893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:36,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233819182] [2021-06-12 20:44:36,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:36,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:44:36,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:36,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:44:36,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:36,191 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:36,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:44:36,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:36,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:36,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:36,215 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:44:36,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:36,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233819182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:36,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:36,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:44:36,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43181696] [2021-06-12 20:44:36,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:44:36,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:36,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:44:36,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:44:36,297 INFO L87 Difference]: Start difference. First operand 2284 states and 8367 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:36,789 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2021-06-12 20:44:38,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:38,510 INFO L93 Difference]: Finished difference Result 2986 states and 10490 transitions. [2021-06-12 20:44:38,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 20:44:38,510 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:44:38,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:38,515 INFO L225 Difference]: With dead ends: 2986 [2021-06-12 20:44:38,515 INFO L226 Difference]: Without dead ends: 2917 [2021-06-12 20:44:38,515 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 1933.7ms TimeCoverageRelationStatistics Valid=659, Invalid=3373, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 20:44:38,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2021-06-12 20:44:38,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 2288. [2021-06-12 20:44:38,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2288 states, 2287 states have (on average 3.6637516397026673) internal successors, (8379), 2287 states have internal predecessors, (8379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:38,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 8379 transitions. [2021-06-12 20:44:38,559 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 8379 transitions. Word has length 24 [2021-06-12 20:44:38,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:38,559 INFO L482 AbstractCegarLoop]: Abstraction has 2288 states and 8379 transitions. [2021-06-12 20:44:38,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:38,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 8379 transitions. [2021-06-12 20:44:38,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:44:38,562 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:38,562 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:38,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable533,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:38,763 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:44:38,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:38,763 INFO L82 PathProgramCache]: Analyzing trace with hash 550864196, now seen corresponding path program 165 times [2021-06-12 20:44:38,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:38,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452918955] [2021-06-12 20:44:38,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:38,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:38,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:38,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:38,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452918955] [2021-06-12 20:44:38,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452918955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:38,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518749852] [2021-06-12 20:44:38,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:38,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:44:38,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:38,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:44:38,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:39,074 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:39,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:44:39,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:39,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:39,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:39,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:44:39,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:39,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518749852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:39,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:39,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:44:39,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177260988] [2021-06-12 20:44:39,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:44:39,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:39,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:44:39,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:44:39,167 INFO L87 Difference]: Start difference. First operand 2288 states and 8379 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:39,667 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-06-12 20:44:40,212 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-06-12 20:44:41,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:41,540 INFO L93 Difference]: Finished difference Result 2940 states and 10329 transitions. [2021-06-12 20:44:41,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 20:44:41,540 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:44:41,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:41,545 INFO L225 Difference]: With dead ends: 2940 [2021-06-12 20:44:41,545 INFO L226 Difference]: Without dead ends: 2900 [2021-06-12 20:44:41,545 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 2100.4ms TimeCoverageRelationStatistics Valid=683, Invalid=3739, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 20:44:41,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2900 states. [2021-06-12 20:44:41,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2900 to 2296. [2021-06-12 20:44:41,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2296 states, 2295 states have (on average 3.6631808278867104) internal successors, (8407), 2295 states have internal predecessors, (8407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:41,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2296 states to 2296 states and 8407 transitions. [2021-06-12 20:44:41,574 INFO L78 Accepts]: Start accepts. Automaton has 2296 states and 8407 transitions. Word has length 24 [2021-06-12 20:44:41,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:41,574 INFO L482 AbstractCegarLoop]: Abstraction has 2296 states and 8407 transitions. [2021-06-12 20:44:41,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:41,574 INFO L276 IsEmpty]: Start isEmpty. Operand 2296 states and 8407 transitions. [2021-06-12 20:44:41,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:44:41,577 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:41,577 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:41,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-06-12 20:44:41,777 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:44:41,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:41,778 INFO L82 PathProgramCache]: Analyzing trace with hash -2058358978, now seen corresponding path program 166 times [2021-06-12 20:44:41,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:41,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122829541] [2021-06-12 20:44:41,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:41,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:41,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:41,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:41,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122829541] [2021-06-12 20:44:41,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122829541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:41,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150721301] [2021-06-12 20:44:41,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:41,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:44:41,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:41,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:44:41,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:42,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:44:42,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:42,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:42,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:42,062 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:44:42,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:42,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150721301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:42,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:42,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:44:42,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845017421] [2021-06-12 20:44:42,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:44:42,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:42,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:44:42,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:44:42,099 INFO L87 Difference]: Start difference. First operand 2296 states and 8407 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:43,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:43,744 INFO L93 Difference]: Finished difference Result 2804 states and 9972 transitions. [2021-06-12 20:44:43,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 20:44:43,744 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:44:43,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:43,748 INFO L225 Difference]: With dead ends: 2804 [2021-06-12 20:44:43,748 INFO L226 Difference]: Without dead ends: 2783 [2021-06-12 20:44:43,748 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 1416.3ms TimeCoverageRelationStatistics Valid=514, Invalid=2566, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 20:44:43,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2021-06-12 20:44:43,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2280. [2021-06-12 20:44:43,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2280 states, 2279 states have (on average 3.6652040368582712) internal successors, (8353), 2279 states have internal predecessors, (8353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:43,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2280 states to 2280 states and 8353 transitions. [2021-06-12 20:44:43,776 INFO L78 Accepts]: Start accepts. Automaton has 2280 states and 8353 transitions. Word has length 24 [2021-06-12 20:44:43,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:43,776 INFO L482 AbstractCegarLoop]: Abstraction has 2280 states and 8353 transitions. [2021-06-12 20:44:43,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:43,776 INFO L276 IsEmpty]: Start isEmpty. Operand 2280 states and 8353 transitions. [2021-06-12 20:44:43,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:44:43,778 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:43,778 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:43,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:43,979 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:44:43,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:43,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1599381192, now seen corresponding path program 95 times [2021-06-12 20:44:43,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:43,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690059045] [2021-06-12 20:44:43,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:43,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:44,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:44,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690059045] [2021-06-12 20:44:44,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690059045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:44,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534941984] [2021-06-12 20:44:44,146 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:44,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:44:44,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:44,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:44:44,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:44,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:44:44,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:44,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:44,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:44,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:44:44,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:44,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534941984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:44,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:44,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:44:44,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378393122] [2021-06-12 20:44:44,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:44:44,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:44,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:44:44,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:44:44,324 INFO L87 Difference]: Start difference. First operand 2280 states and 8353 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:46,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:46,783 INFO L93 Difference]: Finished difference Result 4178 states and 14207 transitions. [2021-06-12 20:44:46,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 20:44:46,784 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:44:46,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:46,790 INFO L225 Difference]: With dead ends: 4178 [2021-06-12 20:44:46,790 INFO L226 Difference]: Without dead ends: 4124 [2021-06-12 20:44:46,790 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1961 ImplicationChecksByTransitivity, 2083.8ms TimeCoverageRelationStatistics Valid=1073, Invalid=4627, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 20:44:46,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4124 states. [2021-06-12 20:44:46,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4124 to 2366. [2021-06-12 20:44:46,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2366 states, 2365 states have (on average 3.6841437632135308) internal successors, (8713), 2365 states have internal predecessors, (8713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:46,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2366 states to 2366 states and 8713 transitions. [2021-06-12 20:44:46,829 INFO L78 Accepts]: Start accepts. Automaton has 2366 states and 8713 transitions. Word has length 24 [2021-06-12 20:44:46,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:46,829 INFO L482 AbstractCegarLoop]: Abstraction has 2366 states and 8713 transitions. [2021-06-12 20:44:46,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:46,829 INFO L276 IsEmpty]: Start isEmpty. Operand 2366 states and 8713 transitions. [2021-06-12 20:44:46,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:44:46,832 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:46,832 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:47,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable540 [2021-06-12 20:44:47,033 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:44:47,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:47,033 INFO L82 PathProgramCache]: Analyzing trace with hash 904724930, now seen corresponding path program 96 times [2021-06-12 20:44:47,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:47,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626201504] [2021-06-12 20:44:47,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:47,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:47,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:47,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:47,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626201504] [2021-06-12 20:44:47,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626201504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:47,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311829219] [2021-06-12 20:44:47,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:47,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:44:47,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:47,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:44:47,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:47,358 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:47,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:44:47,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:47,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:47,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:47,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:44:47,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:47,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311829219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:47,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:47,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:44:47,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060503289] [2021-06-12 20:44:47,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:44:47,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:47,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:44:47,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:44:47,458 INFO L87 Difference]: Start difference. First operand 2366 states and 8713 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:47,800 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-06-12 20:44:48,538 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-06-12 20:44:50,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:50,821 INFO L93 Difference]: Finished difference Result 3774 states and 13082 transitions. [2021-06-12 20:44:50,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-12 20:44:50,821 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:44:50,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:50,827 INFO L225 Difference]: With dead ends: 3774 [2021-06-12 20:44:50,827 INFO L226 Difference]: Without dead ends: 3752 [2021-06-12 20:44:50,827 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2446 ImplicationChecksByTransitivity, 2989.6ms TimeCoverageRelationStatistics Valid=1227, Invalid=5579, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 20:44:50,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3752 states. [2021-06-12 20:44:50,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3752 to 2395. [2021-06-12 20:44:50,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 3.6875522138680035) internal successors, (8828), 2394 states have internal predecessors, (8828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:50,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 8828 transitions. [2021-06-12 20:44:50,879 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 8828 transitions. Word has length 24 [2021-06-12 20:44:50,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:50,879 INFO L482 AbstractCegarLoop]: Abstraction has 2395 states and 8828 transitions. [2021-06-12 20:44:50,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:50,879 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 8828 transitions. [2021-06-12 20:44:50,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:44:50,882 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:50,882 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:51,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-06-12 20:44:51,083 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:44:51,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:51,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1686558730, now seen corresponding path program 97 times [2021-06-12 20:44:51,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:51,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849649026] [2021-06-12 20:44:51,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:51,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:51,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:51,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:51,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849649026] [2021-06-12 20:44:51,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849649026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:51,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666444023] [2021-06-12 20:44:51,245 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:51,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:51,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:44:51,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:51,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:44:51,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:51,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:51,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:51,393 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:44:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:51,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666444023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:51,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:51,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:44:51,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514848417] [2021-06-12 20:44:51,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:44:51,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:51,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:44:51,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:44:51,437 INFO L87 Difference]: Start difference. First operand 2395 states and 8828 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:53,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:53,818 INFO L93 Difference]: Finished difference Result 3784 states and 13107 transitions. [2021-06-12 20:44:53,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 20:44:53,818 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:44:53,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:53,824 INFO L225 Difference]: With dead ends: 3784 [2021-06-12 20:44:53,824 INFO L226 Difference]: Without dead ends: 3728 [2021-06-12 20:44:53,824 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1963 ImplicationChecksByTransitivity, 2067.2ms TimeCoverageRelationStatistics Valid=938, Invalid=4612, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 20:44:53,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3728 states. [2021-06-12 20:44:53,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3728 to 2433. [2021-06-12 20:44:53,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2433 states, 2432 states have (on average 3.6969572368421053) internal successors, (8991), 2432 states have internal predecessors, (8991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:53,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 8991 transitions. [2021-06-12 20:44:53,862 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 8991 transitions. Word has length 24 [2021-06-12 20:44:53,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:53,862 INFO L482 AbstractCegarLoop]: Abstraction has 2433 states and 8991 transitions. [2021-06-12 20:44:53,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:53,862 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 8991 transitions. [2021-06-12 20:44:53,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:44:53,865 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:53,865 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:54,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:54,065 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:44:54,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:54,066 INFO L82 PathProgramCache]: Analyzing trace with hash 638091246, now seen corresponding path program 167 times [2021-06-12 20:44:54,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:54,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899326639] [2021-06-12 20:44:54,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:54,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:54,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:54,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:54,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899326639] [2021-06-12 20:44:54,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899326639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:54,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16134721] [2021-06-12 20:44:54,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:54,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:44:54,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:54,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:44:54,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:54,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:44:54,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:54,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:54,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:54,352 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:44:54,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:54,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16134721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:54,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:54,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:44:54,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998489388] [2021-06-12 20:44:54,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:44:54,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:54,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:44:54,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:44:54,395 INFO L87 Difference]: Start difference. First operand 2433 states and 8991 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:56,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:44:56,944 INFO L93 Difference]: Finished difference Result 4247 states and 14593 transitions. [2021-06-12 20:44:56,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 20:44:56,944 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:44:56,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:44:56,950 INFO L225 Difference]: With dead ends: 4247 [2021-06-12 20:44:56,950 INFO L226 Difference]: Without dead ends: 4186 [2021-06-12 20:44:56,951 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2142 ImplicationChecksByTransitivity, 2163.9ms TimeCoverageRelationStatistics Valid=1171, Invalid=5149, Unknown=0, NotChecked=0, Total=6320 [2021-06-12 20:44:56,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4186 states. [2021-06-12 20:44:56,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4186 to 2486. [2021-06-12 20:44:56,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 3.719919517102616) internal successors, (9244), 2485 states have internal predecessors, (9244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:57,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 9244 transitions. [2021-06-12 20:44:57,001 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 9244 transitions. Word has length 24 [2021-06-12 20:44:57,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:44:57,001 INFO L482 AbstractCegarLoop]: Abstraction has 2486 states and 9244 transitions. [2021-06-12 20:44:57,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:44:57,001 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 9244 transitions. [2021-06-12 20:44:57,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:44:57,004 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:44:57,004 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:44:57,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2021-06-12 20:44:57,205 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:44:57,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:44:57,205 INFO L82 PathProgramCache]: Analyzing trace with hash 961677424, now seen corresponding path program 168 times [2021-06-12 20:44:57,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:44:57,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921570619] [2021-06-12 20:44:57,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:44:57,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:44:57,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:57,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:44:57,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921570619] [2021-06-12 20:44:57,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921570619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:57,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020635369] [2021-06-12 20:44:57,355 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:44:57,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:44:57,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:44:57,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:44:57,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:44:57,491 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:57,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:44:57,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:44:57,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:44:57,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:44:57,501 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:44:57,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:44:57,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020635369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:44:57,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:44:57,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:44:57,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800296689] [2021-06-12 20:44:57,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:44:57,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:44:57,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:44:57,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:44:57,567 INFO L87 Difference]: Start difference. First operand 2486 states and 9244 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:00,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:00,032 INFO L93 Difference]: Finished difference Result 3963 states and 13816 transitions. [2021-06-12 20:45:00,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-12 20:45:00,033 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:45:00,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:00,038 INFO L225 Difference]: With dead ends: 3963 [2021-06-12 20:45:00,039 INFO L226 Difference]: Without dead ends: 3909 [2021-06-12 20:45:00,039 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1979 ImplicationChecksByTransitivity, 2047.0ms TimeCoverageRelationStatistics Valid=1022, Invalid=4830, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 20:45:00,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3909 states. [2021-06-12 20:45:00,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3909 to 2494. [2021-06-12 20:45:00,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2494 states, 2493 states have (on average 3.724027276373847) internal successors, (9284), 2493 states have internal predecessors, (9284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:00,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 9284 transitions. [2021-06-12 20:45:00,076 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 9284 transitions. Word has length 24 [2021-06-12 20:45:00,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:00,077 INFO L482 AbstractCegarLoop]: Abstraction has 2494 states and 9284 transitions. [2021-06-12 20:45:00,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:00,077 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 9284 transitions. [2021-06-12 20:45:00,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:45:00,080 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:00,080 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:00,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable546,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:00,280 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:45:00,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:00,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1498600092, now seen corresponding path program 98 times [2021-06-12 20:45:00,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:00,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882145118] [2021-06-12 20:45:00,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:00,440 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:00,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:00,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882145118] [2021-06-12 20:45:00,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882145118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:00,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171322401] [2021-06-12 20:45:00,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:00,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:45:00,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:00,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:45:00,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:00,588 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:00,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-12 20:45:00,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:00,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:00,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:00,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-12 20:45:00,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:00,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171322401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:00,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:00,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:45:00,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638071879] [2021-06-12 20:45:00,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:45:00,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:00,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:45:00,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:45:00,677 INFO L87 Difference]: Start difference. First operand 2494 states and 9284 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:03,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:03,538 INFO L93 Difference]: Finished difference Result 4202 states and 14799 transitions. [2021-06-12 20:45:03,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-12 20:45:03,538 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:45:03,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:03,545 INFO L225 Difference]: With dead ends: 4202 [2021-06-12 20:45:03,545 INFO L226 Difference]: Without dead ends: 4168 [2021-06-12 20:45:03,545 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2126 ImplicationChecksByTransitivity, 2408.6ms TimeCoverageRelationStatistics Valid=988, Invalid=5332, Unknown=0, NotChecked=0, Total=6320 [2021-06-12 20:45:03,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4168 states. [2021-06-12 20:45:03,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4168 to 2769. [2021-06-12 20:45:03,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2769 states, 2768 states have (on average 3.7846820809248554) internal successors, (10476), 2768 states have internal predecessors, (10476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:03,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2769 states to 2769 states and 10476 transitions. [2021-06-12 20:45:03,588 INFO L78 Accepts]: Start accepts. Automaton has 2769 states and 10476 transitions. Word has length 24 [2021-06-12 20:45:03,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:03,588 INFO L482 AbstractCegarLoop]: Abstraction has 2769 states and 10476 transitions. [2021-06-12 20:45:03,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:03,589 INFO L276 IsEmpty]: Start isEmpty. Operand 2769 states and 10476 transitions. [2021-06-12 20:45:03,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:45:03,592 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:03,592 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:03,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable548 [2021-06-12 20:45:03,792 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:45:03,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:03,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1293681958, now seen corresponding path program 169 times [2021-06-12 20:45:03,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:03,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152544221] [2021-06-12 20:45:03,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:03,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:03,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:03,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152544221] [2021-06-12 20:45:03,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152544221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:03,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3279667] [2021-06-12 20:45:03,954 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:03,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:03,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:45:03,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:04,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:45:04,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:04,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:04,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:04,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:45:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:04,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3279667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:04,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:04,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:45:04,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209462009] [2021-06-12 20:45:04,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:45:04,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:04,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:45:04,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:45:04,138 INFO L87 Difference]: Start difference. First operand 2769 states and 10476 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:06,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:06,786 INFO L93 Difference]: Finished difference Result 4592 states and 16115 transitions. [2021-06-12 20:45:06,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-12 20:45:06,786 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:45:06,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:06,793 INFO L225 Difference]: With dead ends: 4592 [2021-06-12 20:45:06,793 INFO L226 Difference]: Without dead ends: 4538 [2021-06-12 20:45:06,794 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1858 ImplicationChecksByTransitivity, 2160.2ms TimeCoverageRelationStatistics Valid=1040, Invalid=4510, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 20:45:06,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4538 states. [2021-06-12 20:45:06,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4538 to 2781. [2021-06-12 20:45:06,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2781 states, 2780 states have (on average 3.7827338129496404) internal successors, (10516), 2780 states have internal predecessors, (10516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:06,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2781 states to 2781 states and 10516 transitions. [2021-06-12 20:45:06,848 INFO L78 Accepts]: Start accepts. Automaton has 2781 states and 10516 transitions. Word has length 24 [2021-06-12 20:45:06,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:06,848 INFO L482 AbstractCegarLoop]: Abstraction has 2781 states and 10516 transitions. [2021-06-12 20:45:06,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:06,848 INFO L276 IsEmpty]: Start isEmpty. Operand 2781 states and 10516 transitions. [2021-06-12 20:45:06,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:45:06,852 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:06,852 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:07,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:07,052 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:45:07,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:07,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1026428984, now seen corresponding path program 170 times [2021-06-12 20:45:07,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:07,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765642853] [2021-06-12 20:45:07,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:07,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:07,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:07,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765642853] [2021-06-12 20:45:07,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765642853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:07,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51884828] [2021-06-12 20:45:07,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:07,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:45:07,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:07,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:45:07,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:07,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:07,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:45:07,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:45:07,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:07,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:07,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:07,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 20:45:07,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:07,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51884828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:07,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:07,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:45:07,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437858509] [2021-06-12 20:45:07,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:45:07,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:07,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:45:07,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:45:07,510 INFO L87 Difference]: Start difference. First operand 2781 states and 10516 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:07,753 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-06-12 20:45:08,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:08,909 INFO L93 Difference]: Finished difference Result 3378 states and 12278 transitions. [2021-06-12 20:45:08,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 20:45:08,910 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:45:08,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:08,916 INFO L225 Difference]: With dead ends: 3378 [2021-06-12 20:45:08,916 INFO L226 Difference]: Without dead ends: 3328 [2021-06-12 20:45:08,916 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1271.4ms TimeCoverageRelationStatistics Valid=357, Invalid=2093, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:45:08,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3328 states. [2021-06-12 20:45:08,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3328 to 2785. [2021-06-12 20:45:08,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2785 states, 2784 states have (on average 3.7819683908045976) internal successors, (10529), 2784 states have internal predecessors, (10529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:08,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2785 states to 2785 states and 10529 transitions. [2021-06-12 20:45:08,953 INFO L78 Accepts]: Start accepts. Automaton has 2785 states and 10529 transitions. Word has length 24 [2021-06-12 20:45:08,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:08,953 INFO L482 AbstractCegarLoop]: Abstraction has 2785 states and 10529 transitions. [2021-06-12 20:45:08,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:08,953 INFO L276 IsEmpty]: Start isEmpty. Operand 2785 states and 10529 transitions. [2021-06-12 20:45:08,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:45:08,957 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:08,957 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:09,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-06-12 20:45:09,157 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:45:09,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:09,157 INFO L82 PathProgramCache]: Analyzing trace with hash -2054578844, now seen corresponding path program 171 times [2021-06-12 20:45:09,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:09,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292095235] [2021-06-12 20:45:09,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:09,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:09,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:09,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:09,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292095235] [2021-06-12 20:45:09,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292095235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:09,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823969841] [2021-06-12 20:45:09,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:09,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:45:09,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:09,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:45:09,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:09,501 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:09,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:45:09,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:09,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:09,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:09,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:45:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:09,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823969841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:09,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:09,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:45:09,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088535710] [2021-06-12 20:45:09,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:45:09,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:09,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:45:09,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:45:09,597 INFO L87 Difference]: Start difference. First operand 2785 states and 10529 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:09,875 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2021-06-12 20:45:11,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:11,054 INFO L93 Difference]: Finished difference Result 3256 states and 11952 transitions. [2021-06-12 20:45:11,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 20:45:11,054 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:45:11,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:11,059 INFO L225 Difference]: With dead ends: 3256 [2021-06-12 20:45:11,059 INFO L226 Difference]: Without dead ends: 3220 [2021-06-12 20:45:11,059 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1291.8ms TimeCoverageRelationStatistics Valid=371, Invalid=1981, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 20:45:11,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2021-06-12 20:45:11,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 2790. [2021-06-12 20:45:11,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2790 states, 2789 states have (on average 3.7805665112943707) internal successors, (10544), 2789 states have internal predecessors, (10544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:11,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 10544 transitions. [2021-06-12 20:45:11,095 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 10544 transitions. Word has length 24 [2021-06-12 20:45:11,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:11,095 INFO L482 AbstractCegarLoop]: Abstraction has 2790 states and 10544 transitions. [2021-06-12 20:45:11,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:11,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 10544 transitions. [2021-06-12 20:45:11,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:45:11,098 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:11,098 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:11,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-06-12 20:45:11,299 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:45:11,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:11,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1730992666, now seen corresponding path program 172 times [2021-06-12 20:45:11,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:11,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352525812] [2021-06-12 20:45:11,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:11,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:11,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:11,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:11,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352525812] [2021-06-12 20:45:11,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352525812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:11,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055425617] [2021-06-12 20:45:11,470 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:11,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:45:11,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:11,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:45:11,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:11,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:45:11,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:11,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:11,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:11,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:45:11,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:11,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055425617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:11,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:11,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:45:11,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862648160] [2021-06-12 20:45:11,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:45:11,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:11,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:45:11,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:45:11,656 INFO L87 Difference]: Start difference. First operand 2790 states and 10544 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:11,919 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-06-12 20:45:12,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:12,891 INFO L93 Difference]: Finished difference Result 3207 states and 11839 transitions. [2021-06-12 20:45:12,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:45:12,892 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:45:12,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:12,896 INFO L225 Difference]: With dead ends: 3207 [2021-06-12 20:45:12,897 INFO L226 Difference]: Without dead ends: 3182 [2021-06-12 20:45:12,897 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1085.6ms TimeCoverageRelationStatistics Valid=309, Invalid=1583, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:45:12,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2021-06-12 20:45:12,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 2783. [2021-06-12 20:45:12,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2782 states have (on average 3.782530553558591) internal successors, (10523), 2782 states have internal predecessors, (10523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:12,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 10523 transitions. [2021-06-12 20:45:12,933 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 10523 transitions. Word has length 24 [2021-06-12 20:45:12,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:12,933 INFO L482 AbstractCegarLoop]: Abstraction has 2783 states and 10523 transitions. [2021-06-12 20:45:12,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:12,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 10523 transitions. [2021-06-12 20:45:12,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:45:12,937 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:12,937 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:13,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable555 [2021-06-12 20:45:13,137 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:45:13,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:13,137 INFO L82 PathProgramCache]: Analyzing trace with hash -406982280, now seen corresponding path program 173 times [2021-06-12 20:45:13,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:13,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193798668] [2021-06-12 20:45:13,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:13,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:13,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:13,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:13,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193798668] [2021-06-12 20:45:13,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193798668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:13,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367090837] [2021-06-12 20:45:13,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:13,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:45:13,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:13,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:45:13,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:13,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:45:13,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:13,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:13,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:13,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-12 20:45:13,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:13,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367090837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:13,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:13,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:45:13,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239143208] [2021-06-12 20:45:13,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:45:13,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:13,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:45:13,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:45:13,551 INFO L87 Difference]: Start difference. First operand 2783 states and 10523 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:13,842 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-06-12 20:45:15,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:15,400 INFO L93 Difference]: Finished difference Result 3338 states and 12184 transitions. [2021-06-12 20:45:15,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 20:45:15,400 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:45:15,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:15,405 INFO L225 Difference]: With dead ends: 3338 [2021-06-12 20:45:15,405 INFO L226 Difference]: Without dead ends: 3302 [2021-06-12 20:45:15,405 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1446.9ms TimeCoverageRelationStatistics Valid=390, Invalid=2366, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 20:45:15,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3302 states. [2021-06-12 20:45:15,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3302 to 2785. [2021-06-12 20:45:15,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2785 states, 2784 states have (on average 3.7819683908045976) internal successors, (10529), 2784 states have internal predecessors, (10529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:15,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2785 states to 2785 states and 10529 transitions. [2021-06-12 20:45:15,440 INFO L78 Accepts]: Start accepts. Automaton has 2785 states and 10529 transitions. Word has length 24 [2021-06-12 20:45:15,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:15,440 INFO L482 AbstractCegarLoop]: Abstraction has 2785 states and 10529 transitions. [2021-06-12 20:45:15,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:15,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2785 states and 10529 transitions. [2021-06-12 20:45:15,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:45:15,443 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:15,443 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:15,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable556,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:15,644 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:45:15,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:15,644 INFO L82 PathProgramCache]: Analyzing trace with hash -189557394, now seen corresponding path program 174 times [2021-06-12 20:45:15,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:15,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044006644] [2021-06-12 20:45:15,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:15,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:15,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:15,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044006644] [2021-06-12 20:45:15,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044006644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:15,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042880923] [2021-06-12 20:45:15,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:15,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:45:15,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:15,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 20:45:15,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:15,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:15,977 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:15,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-06-12 20:45:15,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:15,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:16,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:16,017 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:350 [2021-06-12 20:45:16,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:16,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042880923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:16,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:16,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:45:16,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589554925] [2021-06-12 20:45:16,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:45:16,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:16,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:45:16,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:45:16,266 INFO L87 Difference]: Start difference. First operand 2785 states and 10529 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:16,707 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2021-06-12 20:45:18,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:18,526 INFO L93 Difference]: Finished difference Result 3326 states and 12143 transitions. [2021-06-12 20:45:18,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 20:45:18,527 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:45:18,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:18,532 INFO L225 Difference]: With dead ends: 3326 [2021-06-12 20:45:18,532 INFO L226 Difference]: Without dead ends: 3290 [2021-06-12 20:45:18,532 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 2050.0ms TimeCoverageRelationStatistics Valid=548, Invalid=2644, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 20:45:18,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3290 states. [2021-06-12 20:45:18,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3290 to 2794. [2021-06-12 20:45:18,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2794 states, 2793 states have (on average 3.779090583601862) internal successors, (10555), 2793 states have internal predecessors, (10555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:18,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2794 states to 2794 states and 10555 transitions. [2021-06-12 20:45:18,568 INFO L78 Accepts]: Start accepts. Automaton has 2794 states and 10555 transitions. Word has length 24 [2021-06-12 20:45:18,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:18,568 INFO L482 AbstractCegarLoop]: Abstraction has 2794 states and 10555 transitions. [2021-06-12 20:45:18,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:18,568 INFO L276 IsEmpty]: Start isEmpty. Operand 2794 states and 10555 transitions. [2021-06-12 20:45:18,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:45:18,572 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:18,572 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:18,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable557 [2021-06-12 20:45:18,772 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:45:18,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:18,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1023295834, now seen corresponding path program 175 times [2021-06-12 20:45:18,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:18,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107223455] [2021-06-12 20:45:18,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:18,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:18,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:18,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107223455] [2021-06-12 20:45:18,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107223455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:18,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112081954] [2021-06-12 20:45:18,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:18,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:45:18,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:19,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:45:19,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:19,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:19,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:19,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:45:19,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:19,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112081954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:19,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:19,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:45:19,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343640072] [2021-06-12 20:45:19,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:45:19,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:19,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:45:19,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:45:19,143 INFO L87 Difference]: Start difference. First operand 2794 states and 10555 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:19,392 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-06-12 20:45:20,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:20,562 INFO L93 Difference]: Finished difference Result 3320 states and 12153 transitions. [2021-06-12 20:45:20,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 20:45:20,562 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:45:20,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:20,567 INFO L225 Difference]: With dead ends: 3320 [2021-06-12 20:45:20,567 INFO L226 Difference]: Without dead ends: 3296 [2021-06-12 20:45:20,567 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1191.5ms TimeCoverageRelationStatistics Valid=371, Invalid=2079, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:45:20,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3296 states. [2021-06-12 20:45:20,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3296 to 2790. [2021-06-12 20:45:20,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2790 states, 2789 states have (on average 3.779849408390104) internal successors, (10542), 2789 states have internal predecessors, (10542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:20,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 10542 transitions. [2021-06-12 20:45:20,613 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 10542 transitions. Word has length 24 [2021-06-12 20:45:20,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:20,614 INFO L482 AbstractCegarLoop]: Abstraction has 2790 states and 10542 transitions. [2021-06-12 20:45:20,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:20,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 10542 transitions. [2021-06-12 20:45:20,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:45:20,617 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:20,617 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:20,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-06-12 20:45:20,817 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:45:20,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:20,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1855921234, now seen corresponding path program 176 times [2021-06-12 20:45:20,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:20,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029056962] [2021-06-12 20:45:20,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:20,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:20,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:20,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:20,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029056962] [2021-06-12 20:45:20,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029056962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:20,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888790012] [2021-06-12 20:45:20,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:20,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:45:20,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:20,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:45:20,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:21,091 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:21,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:45:21,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:21,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:21,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:21,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-12 20:45:21,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:21,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888790012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:21,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:21,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:45:21,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720229120] [2021-06-12 20:45:21,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:45:21,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:21,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:45:21,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:45:21,208 INFO L87 Difference]: Start difference. First operand 2790 states and 10542 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:21,485 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-06-12 20:45:21,928 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2021-06-12 20:45:22,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:22,804 INFO L93 Difference]: Finished difference Result 3245 states and 11918 transitions. [2021-06-12 20:45:22,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 20:45:22,804 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:45:22,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:22,809 INFO L225 Difference]: With dead ends: 3245 [2021-06-12 20:45:22,809 INFO L226 Difference]: Without dead ends: 3219 [2021-06-12 20:45:22,809 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1339.3ms TimeCoverageRelationStatistics Valid=364, Invalid=1892, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:45:22,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3219 states. [2021-06-12 20:45:22,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3219 to 2794. [2021-06-12 20:45:22,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2794 states, 2793 states have (on average 3.778374507697816) internal successors, (10553), 2793 states have internal predecessors, (10553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:22,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2794 states to 2794 states and 10553 transitions. [2021-06-12 20:45:22,848 INFO L78 Accepts]: Start accepts. Automaton has 2794 states and 10553 transitions. Word has length 24 [2021-06-12 20:45:22,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:22,848 INFO L482 AbstractCegarLoop]: Abstraction has 2794 states and 10553 transitions. [2021-06-12 20:45:22,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:22,848 INFO L276 IsEmpty]: Start isEmpty. Operand 2794 states and 10553 transitions. [2021-06-12 20:45:22,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:45:22,851 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:22,851 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:23,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2021-06-12 20:45:23,052 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:45:23,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:23,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1532335056, now seen corresponding path program 177 times [2021-06-12 20:45:23,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:23,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465673976] [2021-06-12 20:45:23,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:23,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:23,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:23,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465673976] [2021-06-12 20:45:23,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465673976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:23,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212012455] [2021-06-12 20:45:23,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:23,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:45:23,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:23,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:45:23,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:23,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:23,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:45:23,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:23,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:23,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:23,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-12 20:45:23,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:23,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212012455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:23,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:23,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:45:23,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782186112] [2021-06-12 20:45:23,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:45:23,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:23,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:45:23,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:45:23,463 INFO L87 Difference]: Start difference. First operand 2794 states and 10553 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:23,732 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-06-12 20:45:24,126 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2021-06-12 20:45:24,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:24,933 INFO L93 Difference]: Finished difference Result 3212 states and 11807 transitions. [2021-06-12 20:45:24,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 20:45:24,933 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:45:24,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:24,938 INFO L225 Difference]: With dead ends: 3212 [2021-06-12 20:45:24,938 INFO L226 Difference]: Without dead ends: 3194 [2021-06-12 20:45:24,938 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 1272.3ms TimeCoverageRelationStatistics Valid=338, Invalid=1824, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:45:24,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3194 states. [2021-06-12 20:45:24,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3194 to 2797. [2021-06-12 20:45:24,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2797 states, 2796 states have (on average 3.7775393419170245) internal successors, (10562), 2796 states have internal predecessors, (10562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:24,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2797 states to 2797 states and 10562 transitions. [2021-06-12 20:45:24,972 INFO L78 Accepts]: Start accepts. Automaton has 2797 states and 10562 transitions. Word has length 24 [2021-06-12 20:45:24,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:24,972 INFO L482 AbstractCegarLoop]: Abstraction has 2797 states and 10562 transitions. [2021-06-12 20:45:24,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:24,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2797 states and 10562 transitions. [2021-06-12 20:45:24,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:45:24,976 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:24,976 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:25,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:25,176 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:45:25,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:25,177 INFO L82 PathProgramCache]: Analyzing trace with hash 153409066, now seen corresponding path program 178 times [2021-06-12 20:45:25,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:25,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117539121] [2021-06-12 20:45:25,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:25,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:25,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:25,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117539121] [2021-06-12 20:45:25,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117539121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:25,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922934173] [2021-06-12 20:45:25,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:25,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:45:25,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:25,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:45:25,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:25,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:45:25,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:25,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:25,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:25,458 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:45:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:25,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922934173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:25,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:25,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:45:25,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156564299] [2021-06-12 20:45:25,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:45:25,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:25,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:45:25,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:45:25,511 INFO L87 Difference]: Start difference. First operand 2797 states and 10562 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:26,122 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-06-12 20:45:26,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:26,755 INFO L93 Difference]: Finished difference Result 3156 states and 11659 transitions. [2021-06-12 20:45:26,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:45:26,755 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:45:26,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:26,760 INFO L225 Difference]: With dead ends: 3156 [2021-06-12 20:45:26,760 INFO L226 Difference]: Without dead ends: 3139 [2021-06-12 20:45:26,760 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1060.8ms TimeCoverageRelationStatistics Valid=269, Invalid=1453, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:45:26,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3139 states. [2021-06-12 20:45:26,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3139 to 2791. [2021-06-12 20:45:26,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 3.7795698924731185) internal successors, (10545), 2790 states have internal predecessors, (10545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:26,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 10545 transitions. [2021-06-12 20:45:26,803 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 10545 transitions. Word has length 24 [2021-06-12 20:45:26,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:26,803 INFO L482 AbstractCegarLoop]: Abstraction has 2791 states and 10545 transitions. [2021-06-12 20:45:26,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:26,803 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 10545 transitions. [2021-06-12 20:45:26,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:45:26,807 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:26,807 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:27,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-06-12 20:45:27,014 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:45:27,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:27,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1558844418, now seen corresponding path program 179 times [2021-06-12 20:45:27,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:27,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537388410] [2021-06-12 20:45:27,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:27,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:27,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:27,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:27,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537388410] [2021-06-12 20:45:27,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537388410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:27,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120159993] [2021-06-12 20:45:27,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:27,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:45:27,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:27,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:45:27,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:27,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:45:27,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:27,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:27,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:27,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:45:27,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:27,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120159993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:27,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:27,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:45:27,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117720635] [2021-06-12 20:45:27,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:45:27,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:27,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:45:27,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:45:27,355 INFO L87 Difference]: Start difference. First operand 2791 states and 10545 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:28,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:28,557 INFO L93 Difference]: Finished difference Result 3273 states and 12003 transitions. [2021-06-12 20:45:28,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:45:28,558 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:45:28,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:28,563 INFO L225 Difference]: With dead ends: 3273 [2021-06-12 20:45:28,563 INFO L226 Difference]: Without dead ends: 3247 [2021-06-12 20:45:28,563 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 976.4ms TimeCoverageRelationStatistics Valid=311, Invalid=1581, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:45:28,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2021-06-12 20:45:28,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 2791. [2021-06-12 20:45:28,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 3.7795698924731185) internal successors, (10545), 2790 states have internal predecessors, (10545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:28,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 10545 transitions. [2021-06-12 20:45:28,597 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 10545 transitions. Word has length 24 [2021-06-12 20:45:28,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:28,597 INFO L482 AbstractCegarLoop]: Abstraction has 2791 states and 10545 transitions. [2021-06-12 20:45:28,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:28,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 10545 transitions. [2021-06-12 20:45:28,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:45:28,601 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:28,601 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:28,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 301 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-06-12 20:45:28,801 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:45:28,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:28,802 INFO L82 PathProgramCache]: Analyzing trace with hash 945261704, now seen corresponding path program 180 times [2021-06-12 20:45:28,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:28,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939846153] [2021-06-12 20:45:28,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:28,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:28,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:28,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939846153] [2021-06-12 20:45:28,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939846153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:28,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034744579] [2021-06-12 20:45:28,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:28,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:45:28,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:28,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:45:28,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:29,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:45:29,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:29,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:29,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:29,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:45:29,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:29,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034744579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:29,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:29,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:45:29,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394088689] [2021-06-12 20:45:29,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:45:29,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:29,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:45:29,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:45:29,165 INFO L87 Difference]: Start difference. First operand 2791 states and 10545 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:29,698 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-12 20:45:30,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:30,174 INFO L93 Difference]: Finished difference Result 3237 states and 11894 transitions. [2021-06-12 20:45:30,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:45:30,174 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:45:30,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:30,179 INFO L225 Difference]: With dead ends: 3237 [2021-06-12 20:45:30,180 INFO L226 Difference]: Without dead ends: 3215 [2021-06-12 20:45:30,180 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 907.3ms TimeCoverageRelationStatistics Valid=303, Invalid=1503, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:45:30,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3215 states. [2021-06-12 20:45:30,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3215 to 2791. [2021-06-12 20:45:30,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 3.7795698924731185) internal successors, (10545), 2790 states have internal predecessors, (10545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:30,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 10545 transitions. [2021-06-12 20:45:30,218 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 10545 transitions. Word has length 24 [2021-06-12 20:45:30,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:30,218 INFO L482 AbstractCegarLoop]: Abstraction has 2791 states and 10545 transitions. [2021-06-12 20:45:30,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:30,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 10545 transitions. [2021-06-12 20:45:30,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:45:30,221 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:30,221 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:30,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable577 [2021-06-12 20:45:30,433 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:45:30,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:30,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1622816248, now seen corresponding path program 181 times [2021-06-12 20:45:30,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:30,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528435787] [2021-06-12 20:45:30,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:30,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:30,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:30,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:30,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528435787] [2021-06-12 20:45:30,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528435787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:30,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932840904] [2021-06-12 20:45:30,592 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:30,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:30,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:45:30,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:30,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:45:30,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:30,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:30,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:30,767 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:45:30,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:30,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932840904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:30,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:30,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:45:30,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128304746] [2021-06-12 20:45:30,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:45:30,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:30,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:45:30,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:45:30,823 INFO L87 Difference]: Start difference. First operand 2791 states and 10545 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:31,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:31,993 INFO L93 Difference]: Finished difference Result 3213 states and 11832 transitions. [2021-06-12 20:45:31,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:45:31,993 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:45:31,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:31,998 INFO L225 Difference]: With dead ends: 3213 [2021-06-12 20:45:31,998 INFO L226 Difference]: Without dead ends: 3190 [2021-06-12 20:45:31,998 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1009.9ms TimeCoverageRelationStatistics Valid=309, Invalid=1671, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:45:32,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2021-06-12 20:45:32,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 2793. [2021-06-12 20:45:32,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2793 states, 2792 states have (on average 3.7786532951289398) internal successors, (10550), 2792 states have internal predecessors, (10550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:32,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2793 states to 2793 states and 10550 transitions. [2021-06-12 20:45:32,032 INFO L78 Accepts]: Start accepts. Automaton has 2793 states and 10550 transitions. Word has length 24 [2021-06-12 20:45:32,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:32,032 INFO L482 AbstractCegarLoop]: Abstraction has 2793 states and 10550 transitions. [2021-06-12 20:45:32,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:32,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2793 states and 10550 transitions. [2021-06-12 20:45:32,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:45:32,035 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:32,035 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:32,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:32,236 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:45:32,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:32,236 INFO L82 PathProgramCache]: Analyzing trace with hash -643401800, now seen corresponding path program 182 times [2021-06-12 20:45:32,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:32,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157498615] [2021-06-12 20:45:32,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:32,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:32,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:32,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:32,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157498615] [2021-06-12 20:45:32,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157498615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:32,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105027974] [2021-06-12 20:45:32,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:32,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:45:32,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:32,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:45:32,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:32,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:45:32,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:32,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:32,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:32,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:45:32,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:32,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105027974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:32,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:32,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:45:32,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130096104] [2021-06-12 20:45:32,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:45:32,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:32,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:45:32,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:45:32,596 INFO L87 Difference]: Start difference. First operand 2793 states and 10550 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:33,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:33,594 INFO L93 Difference]: Finished difference Result 3218 states and 11844 transitions. [2021-06-12 20:45:33,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:45:33,595 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:45:33,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:33,599 INFO L225 Difference]: With dead ends: 3218 [2021-06-12 20:45:33,599 INFO L226 Difference]: Without dead ends: 3196 [2021-06-12 20:45:33,599 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 891.3ms TimeCoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:45:33,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3196 states. [2021-06-12 20:45:33,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3196 to 2790. [2021-06-12 20:45:33,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2790 states, 2789 states have (on average 3.779849408390104) internal successors, (10542), 2789 states have internal predecessors, (10542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:33,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 10542 transitions. [2021-06-12 20:45:33,633 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 10542 transitions. Word has length 24 [2021-06-12 20:45:33,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:33,633 INFO L482 AbstractCegarLoop]: Abstraction has 2790 states and 10542 transitions. [2021-06-12 20:45:33,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:33,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 10542 transitions. [2021-06-12 20:45:33,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:45:33,636 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:33,636 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:33,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-06-12 20:45:33,837 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:45:33,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:33,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1889346820, now seen corresponding path program 99 times [2021-06-12 20:45:33,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:33,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155222922] [2021-06-12 20:45:33,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:33,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:33,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:33,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:33,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155222922] [2021-06-12 20:45:33,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155222922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:33,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222102161] [2021-06-12 20:45:33,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:34,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:45:34,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:34,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:45:34,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:34,204 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:34,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:45:34,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:34,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:34,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:34,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:45:34,300 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:34,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222102161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:34,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:34,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:45:34,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168004280] [2021-06-12 20:45:34,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:45:34,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:34,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:45:34,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:45:34,300 INFO L87 Difference]: Start difference. First operand 2790 states and 10542 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:37,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:37,979 INFO L93 Difference]: Finished difference Result 4181 states and 14688 transitions. [2021-06-12 20:45:37,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-12 20:45:37,979 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:45:37,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:37,986 INFO L225 Difference]: With dead ends: 4181 [2021-06-12 20:45:37,986 INFO L226 Difference]: Without dead ends: 4131 [2021-06-12 20:45:37,987 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2712 ImplicationChecksByTransitivity, 3310.9ms TimeCoverageRelationStatistics Valid=1278, Invalid=6378, Unknown=0, NotChecked=0, Total=7656 [2021-06-12 20:45:37,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4131 states. [2021-06-12 20:45:38,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4131 to 2834. [2021-06-12 20:45:38,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2834 states, 2833 states have (on average 3.7871514295799504) internal successors, (10729), 2833 states have internal predecessors, (10729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:38,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2834 states to 2834 states and 10729 transitions. [2021-06-12 20:45:38,047 INFO L78 Accepts]: Start accepts. Automaton has 2834 states and 10729 transitions. Word has length 24 [2021-06-12 20:45:38,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:38,047 INFO L482 AbstractCegarLoop]: Abstraction has 2834 states and 10729 transitions. [2021-06-12 20:45:38,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:38,048 INFO L276 IsEmpty]: Start isEmpty. Operand 2834 states and 10729 transitions. [2021-06-12 20:45:38,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:45:38,051 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:38,051 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:38,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,305 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:38,251 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:45:38,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:38,252 INFO L82 PathProgramCache]: Analyzing trace with hash 98485646, now seen corresponding path program 100 times [2021-06-12 20:45:38,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:38,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677602735] [2021-06-12 20:45:38,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:38,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:38,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:38,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:38,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677602735] [2021-06-12 20:45:38,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677602735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:38,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095233471] [2021-06-12 20:45:38,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:38,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:45:38,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:38,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:45:38,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:38,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:45:38,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:38,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:38,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:38,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:45:38,597 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:38,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095233471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:38,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:38,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:45:38,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426648776] [2021-06-12 20:45:38,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:45:38,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:38,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:45:38,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:45:38,598 INFO L87 Difference]: Start difference. First operand 2834 states and 10729 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:41,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:41,086 INFO L93 Difference]: Finished difference Result 3970 states and 14222 transitions. [2021-06-12 20:45:41,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-12 20:45:41,086 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:45:41,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:41,094 INFO L225 Difference]: With dead ends: 3970 [2021-06-12 20:45:41,094 INFO L226 Difference]: Without dead ends: 3948 [2021-06-12 20:45:41,094 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1996 ImplicationChecksByTransitivity, 2067.9ms TimeCoverageRelationStatistics Valid=1020, Invalid=4832, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 20:45:41,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2021-06-12 20:45:41,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 2862. [2021-06-12 20:45:41,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2861 states have (on average 3.788885005242922) internal successors, (10840), 2861 states have internal predecessors, (10840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:41,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 10840 transitions. [2021-06-12 20:45:41,144 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 10840 transitions. Word has length 24 [2021-06-12 20:45:41,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:41,144 INFO L482 AbstractCegarLoop]: Abstraction has 2862 states and 10840 transitions. [2021-06-12 20:45:41,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:41,144 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 10840 transitions. [2021-06-12 20:45:41,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:45:41,148 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:41,148 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:41,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:41,348 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:45:41,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:41,349 INFO L82 PathProgramCache]: Analyzing trace with hash -168148038, now seen corresponding path program 183 times [2021-06-12 20:45:41,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:41,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894392332] [2021-06-12 20:45:41,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:41,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:41,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:41,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:41,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894392332] [2021-06-12 20:45:41,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894392332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:41,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094112378] [2021-06-12 20:45:41,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:41,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:45:41,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:41,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 20:45:41,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:41,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:45:41,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:41,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-06-12 20:45:41,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:41,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:41,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:41,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:54 [2021-06-12 20:45:41,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:41,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094112378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:41,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:41,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:45:41,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938701884] [2021-06-12 20:45:41,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:45:41,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:41,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:45:41,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:45:41,955 INFO L87 Difference]: Start difference. First operand 2862 states and 10840 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:42,529 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 40 [2021-06-12 20:45:44,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:44,769 INFO L93 Difference]: Finished difference Result 3928 states and 14042 transitions. [2021-06-12 20:45:44,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 20:45:44,769 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:45:44,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:44,775 INFO L225 Difference]: With dead ends: 3928 [2021-06-12 20:45:44,775 INFO L226 Difference]: Without dead ends: 3896 [2021-06-12 20:45:44,775 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 2450.1ms TimeCoverageRelationStatistics Valid=723, Invalid=4247, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 20:45:44,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3896 states. [2021-06-12 20:45:44,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3896 to 2879. [2021-06-12 20:45:44,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 3.791174426685198) internal successors, (10911), 2878 states have internal predecessors, (10911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:44,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 10911 transitions. [2021-06-12 20:45:44,814 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 10911 transitions. Word has length 24 [2021-06-12 20:45:44,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:44,814 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 10911 transitions. [2021-06-12 20:45:44,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:44,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 10911 transitions. [2021-06-12 20:45:44,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:45:44,818 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:44,818 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:45,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable584 [2021-06-12 20:45:45,018 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:45:45,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:45,019 INFO L82 PathProgramCache]: Analyzing trace with hash 155438140, now seen corresponding path program 184 times [2021-06-12 20:45:45,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:45,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016853842] [2021-06-12 20:45:45,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:45,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:45,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:45,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016853842] [2021-06-12 20:45:45,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016853842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:45,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902685973] [2021-06-12 20:45:45,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:45,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:45:45,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:45,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:45:45,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:45,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:45:45,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:45,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:45,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:45,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:45:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:45,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902685973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:45,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:45,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:45:45,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449098954] [2021-06-12 20:45:45,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:45:45,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:45,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:45:45,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:45:45,353 INFO L87 Difference]: Start difference. First operand 2879 states and 10911 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:47,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:47,886 INFO L93 Difference]: Finished difference Result 3884 states and 13980 transitions. [2021-06-12 20:45:47,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 20:45:47,887 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:45:47,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:47,893 INFO L225 Difference]: With dead ends: 3884 [2021-06-12 20:45:47,893 INFO L226 Difference]: Without dead ends: 3862 [2021-06-12 20:45:47,893 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2140 ImplicationChecksByTransitivity, 2146.0ms TimeCoverageRelationStatistics Valid=973, Invalid=5189, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 20:45:47,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2021-06-12 20:45:47,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 2881. [2021-06-12 20:45:47,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2881 states, 2880 states have (on average 3.790277777777778) internal successors, (10916), 2880 states have internal predecessors, (10916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:47,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2881 states to 2881 states and 10916 transitions. [2021-06-12 20:45:47,946 INFO L78 Accepts]: Start accepts. Automaton has 2881 states and 10916 transitions. Word has length 24 [2021-06-12 20:45:47,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:47,947 INFO L482 AbstractCegarLoop]: Abstraction has 2881 states and 10916 transitions. [2021-06-12 20:45:47,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:47,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2881 states and 10916 transitions. [2021-06-12 20:45:47,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:45:47,950 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:47,950 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:48,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable596 [2021-06-12 20:45:48,151 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:45:48,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:48,151 INFO L82 PathProgramCache]: Analyzing trace with hash 692360808, now seen corresponding path program 101 times [2021-06-12 20:45:48,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:48,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125112903] [2021-06-12 20:45:48,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:48,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:48,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:48,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:48,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125112903] [2021-06-12 20:45:48,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125112903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:48,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347774922] [2021-06-12 20:45:48,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:48,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:45:48,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:48,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:45:48,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:48,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:45:48,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:48,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:48,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:48,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:45:48,487 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:48,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347774922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:48,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:48,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:45:48,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106475254] [2021-06-12 20:45:48,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:45:48,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:48,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:45:48,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:45:48,488 INFO L87 Difference]: Start difference. First operand 2881 states and 10916 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:50,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:50,733 INFO L93 Difference]: Finished difference Result 4390 states and 15566 transitions. [2021-06-12 20:45:50,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 20:45:50,734 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:45:50,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:50,740 INFO L225 Difference]: With dead ends: 4390 [2021-06-12 20:45:50,741 INFO L226 Difference]: Without dead ends: 4345 [2021-06-12 20:45:50,741 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 1914.7ms TimeCoverageRelationStatistics Valid=1003, Invalid=4399, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 20:45:50,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4345 states. [2021-06-12 20:45:50,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4345 to 3010. [2021-06-12 20:45:50,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 3.8062479228979726) internal successors, (11453), 3009 states have internal predecessors, (11453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:50,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 11453 transitions. [2021-06-12 20:45:50,787 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 11453 transitions. Word has length 24 [2021-06-12 20:45:50,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:50,787 INFO L482 AbstractCegarLoop]: Abstraction has 3010 states and 11453 transitions. [2021-06-12 20:45:50,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:50,787 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 11453 transitions. [2021-06-12 20:45:50,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:45:50,791 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:50,791 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:50,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-06-12 20:45:50,991 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:45:50,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:50,992 INFO L82 PathProgramCache]: Analyzing trace with hash 487442674, now seen corresponding path program 185 times [2021-06-12 20:45:50,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:50,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358703337] [2021-06-12 20:45:50,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:51,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:51,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:51,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358703337] [2021-06-12 20:45:51,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358703337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:51,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034515956] [2021-06-12 20:45:51,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:51,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:45:51,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:51,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:45:51,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:51,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:45:51,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:51,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:51,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:51,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:45:51,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:51,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034515956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:51,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:51,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:45:51,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600985805] [2021-06-12 20:45:51,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:45:51,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:51,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:45:51,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:45:51,330 INFO L87 Difference]: Start difference. First operand 3010 states and 11453 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:53,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:53,877 INFO L93 Difference]: Finished difference Result 4523 states and 16142 transitions. [2021-06-12 20:45:53,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-12 20:45:53,877 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:45:53,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:53,884 INFO L225 Difference]: With dead ends: 4523 [2021-06-12 20:45:53,884 INFO L226 Difference]: Without dead ends: 4469 [2021-06-12 20:45:53,885 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1903 ImplicationChecksByTransitivity, 2094.5ms TimeCoverageRelationStatistics Valid=1011, Invalid=4539, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 20:45:53,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2021-06-12 20:45:53,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 3113. [2021-06-12 20:45:53,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3113 states, 3112 states have (on average 3.8251928020565553) internal successors, (11904), 3112 states have internal predecessors, (11904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:53,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3113 states to 3113 states and 11904 transitions. [2021-06-12 20:45:53,946 INFO L78 Accepts]: Start accepts. Automaton has 3113 states and 11904 transitions. Word has length 24 [2021-06-12 20:45:53,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:53,946 INFO L482 AbstractCegarLoop]: Abstraction has 3113 states and 11904 transitions. [2021-06-12 20:45:53,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:53,946 INFO L276 IsEmpty]: Start isEmpty. Operand 3113 states and 11904 transitions. [2021-06-12 20:45:53,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:45:53,950 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:53,950 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:54,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-12 20:45:54,151 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:45:54,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:54,151 INFO L82 PathProgramCache]: Analyzing trace with hash -380303656, now seen corresponding path program 186 times [2021-06-12 20:45:54,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:54,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105488822] [2021-06-12 20:45:54,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:54,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:54,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:54,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:54,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105488822] [2021-06-12 20:45:54,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105488822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:54,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21401945] [2021-06-12 20:45:54,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:54,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:45:54,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:54,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:45:54,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:54,430 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:54,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:45:54,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:54,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:54,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:54,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-12 20:45:54,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:54,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21401945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:54,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:54,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:45:54,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626993877] [2021-06-12 20:45:54,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:45:54,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:54,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:45:54,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:45:54,534 INFO L87 Difference]: Start difference. First operand 3113 states and 11904 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:54,901 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-06-12 20:45:56,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:56,649 INFO L93 Difference]: Finished difference Result 4045 states and 14733 transitions. [2021-06-12 20:45:56,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 20:45:56,649 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:45:56,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:56,655 INFO L225 Difference]: With dead ends: 4045 [2021-06-12 20:45:56,656 INFO L226 Difference]: Without dead ends: 4036 [2021-06-12 20:45:56,656 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 1759.7ms TimeCoverageRelationStatistics Valid=622, Invalid=3538, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 20:45:56,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4036 states. [2021-06-12 20:45:56,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4036 to 3118. [2021-06-12 20:45:56,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3118 states, 3117 states have (on average 3.8248315688161694) internal successors, (11922), 3117 states have internal predecessors, (11922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:56,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3118 states to 3118 states and 11922 transitions. [2021-06-12 20:45:56,700 INFO L78 Accepts]: Start accepts. Automaton has 3118 states and 11922 transitions. Word has length 24 [2021-06-12 20:45:56,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:56,700 INFO L482 AbstractCegarLoop]: Abstraction has 3118 states and 11922 transitions. [2021-06-12 20:45:56,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:56,700 INFO L276 IsEmpty]: Start isEmpty. Operand 3118 states and 11922 transitions. [2021-06-12 20:45:56,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:45:56,704 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:56,704 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:56,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable599,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:56,905 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:45:56,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:56,905 INFO L82 PathProgramCache]: Analyzing trace with hash -56717478, now seen corresponding path program 187 times [2021-06-12 20:45:56,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:56,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162686696] [2021-06-12 20:45:56,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:56,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:57,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:57,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:57,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162686696] [2021-06-12 20:45:57,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162686696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:57,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393311553] [2021-06-12 20:45:57,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:57,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:45:57,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:57,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:45:57,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:57,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:57,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:57,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:45:57,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:57,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393311553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:57,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:45:57,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:45:57,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539885105] [2021-06-12 20:45:57,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:45:57,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:45:57,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:45:57,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:45:57,230 INFO L87 Difference]: Start difference. First operand 3118 states and 11922 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:57,586 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-06-12 20:45:59,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:45:59,309 INFO L93 Difference]: Finished difference Result 4078 states and 14822 transitions. [2021-06-12 20:45:59,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 20:45:59,309 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:45:59,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:45:59,316 INFO L225 Difference]: With dead ends: 4078 [2021-06-12 20:45:59,316 INFO L226 Difference]: Without dead ends: 4045 [2021-06-12 20:45:59,316 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 1688.1ms TimeCoverageRelationStatistics Valid=633, Invalid=3273, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 20:45:59,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4045 states. [2021-06-12 20:45:59,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4045 to 3135. [2021-06-12 20:45:59,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3135 states, 3134 states have (on average 3.829929802169751) internal successors, (12003), 3134 states have internal predecessors, (12003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:59,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3135 states to 3135 states and 12003 transitions. [2021-06-12 20:45:59,366 INFO L78 Accepts]: Start accepts. Automaton has 3135 states and 12003 transitions. Word has length 24 [2021-06-12 20:45:59,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:45:59,366 INFO L482 AbstractCegarLoop]: Abstraction has 3135 states and 12003 transitions. [2021-06-12 20:45:59,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:45:59,366 INFO L276 IsEmpty]: Start isEmpty. Operand 3135 states and 12003 transitions. [2021-06-12 20:45:59,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:45:59,370 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:45:59,370 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:45:59,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-06-12 20:45:59,586 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:45:59,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:45:59,586 INFO L82 PathProgramCache]: Analyzing trace with hash -83226840, now seen corresponding path program 188 times [2021-06-12 20:45:59,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:45:59,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790853953] [2021-06-12 20:45:59,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:45:59,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:45:59,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:45:59,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:45:59,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790853953] [2021-06-12 20:45:59,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790853953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:45:59,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298381395] [2021-06-12 20:45:59,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:45:59,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:45:59,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:45:59,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:45:59,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:45:59,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:59,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:45:59,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:45:59,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:45:59,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:45:59,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-12 20:46:00,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:00,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298381395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:00,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:00,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:46:00,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509594289] [2021-06-12 20:46:00,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:46:00,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:00,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:46:00,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:46:00,028 INFO L87 Difference]: Start difference. First operand 3135 states and 12003 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:02,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:02,823 INFO L93 Difference]: Finished difference Result 4435 states and 15824 transitions. [2021-06-12 20:46:02,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 20:46:02,823 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:46:02,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:02,830 INFO L225 Difference]: With dead ends: 4435 [2021-06-12 20:46:02,830 INFO L226 Difference]: Without dead ends: 4417 [2021-06-12 20:46:02,831 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2110 ImplicationChecksByTransitivity, 2231.0ms TimeCoverageRelationStatistics Valid=869, Invalid=5451, Unknown=0, NotChecked=0, Total=6320 [2021-06-12 20:46:02,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4417 states. [2021-06-12 20:46:02,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4417 to 3143. [2021-06-12 20:46:02,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3143 states, 3142 states have (on average 3.8309993634627624) internal successors, (12037), 3142 states have internal predecessors, (12037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:02,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3143 states to 3143 states and 12037 transitions. [2021-06-12 20:46:02,881 INFO L78 Accepts]: Start accepts. Automaton has 3143 states and 12037 transitions. Word has length 24 [2021-06-12 20:46:02,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:02,881 INFO L482 AbstractCegarLoop]: Abstraction has 3143 states and 12037 transitions. [2021-06-12 20:46:02,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:02,881 INFO L276 IsEmpty]: Start isEmpty. Operand 3143 states and 12037 transitions. [2021-06-12 20:46:02,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:46:02,885 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:02,885 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:03,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable602 [2021-06-12 20:46:03,085 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:46:03,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:03,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1874088014, now seen corresponding path program 189 times [2021-06-12 20:46:03,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:03,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726400305] [2021-06-12 20:46:03,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:03,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:03,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:03,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:03,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726400305] [2021-06-12 20:46:03,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726400305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:03,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945478598] [2021-06-12 20:46:03,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:03,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:46:03,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:03,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:46:03,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:03,359 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:03,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:46:03,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:03,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:03,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:03,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-12 20:46:03,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:03,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945478598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:03,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:03,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:46:03,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718100983] [2021-06-12 20:46:03,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:46:03,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:03,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:46:03,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:46:03,490 INFO L87 Difference]: Start difference. First operand 3143 states and 12037 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:03,868 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-06-12 20:46:04,145 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-06-12 20:46:06,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:06,031 INFO L93 Difference]: Finished difference Result 4105 states and 14910 transitions. [2021-06-12 20:46:06,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-12 20:46:06,032 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:46:06,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:06,038 INFO L225 Difference]: With dead ends: 4105 [2021-06-12 20:46:06,038 INFO L226 Difference]: Without dead ends: 4086 [2021-06-12 20:46:06,039 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 2146.1ms TimeCoverageRelationStatistics Valid=889, Invalid=4963, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 20:46:06,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4086 states. [2021-06-12 20:46:06,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4086 to 3144. [2021-06-12 20:46:06,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3144 states, 3143 states have (on average 3.8307349665924275) internal successors, (12040), 3143 states have internal predecessors, (12040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:06,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3144 states to 3144 states and 12040 transitions. [2021-06-12 20:46:06,083 INFO L78 Accepts]: Start accepts. Automaton has 3144 states and 12040 transitions. Word has length 24 [2021-06-12 20:46:06,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:06,083 INFO L482 AbstractCegarLoop]: Abstraction has 3144 states and 12040 transitions. [2021-06-12 20:46:06,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:06,083 INFO L276 IsEmpty]: Start isEmpty. Operand 3144 states and 12040 transitions. [2021-06-12 20:46:06,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:46:06,087 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:06,087 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:06,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable604 [2021-06-12 20:46:06,288 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:46:06,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:06,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1092254214, now seen corresponding path program 190 times [2021-06-12 20:46:06,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:06,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339732505] [2021-06-12 20:46:06,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:06,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:06,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:06,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:06,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339732505] [2021-06-12 20:46:06,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339732505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:06,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017765987] [2021-06-12 20:46:06,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:06,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:46:06,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:06,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:46:06,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:06,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:46:06,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:06,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:06,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:06,581 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:46:06,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:06,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017765987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:06,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:06,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:46:06,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402643809] [2021-06-12 20:46:06,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:46:06,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:06,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:46:06,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:46:06,635 INFO L87 Difference]: Start difference. First operand 3144 states and 12040 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:06,974 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-12 20:46:08,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:08,423 INFO L93 Difference]: Finished difference Result 3824 states and 14104 transitions. [2021-06-12 20:46:08,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 20:46:08,423 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:46:08,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:08,429 INFO L225 Difference]: With dead ends: 3824 [2021-06-12 20:46:08,429 INFO L226 Difference]: Without dead ends: 3811 [2021-06-12 20:46:08,429 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 1573.7ms TimeCoverageRelationStatistics Valid=633, Invalid=3527, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 20:46:08,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3811 states. [2021-06-12 20:46:08,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3811 to 3155. [2021-06-12 20:46:08,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3155 states, 3154 states have (on average 3.8332276474318325) internal successors, (12090), 3154 states have internal predecessors, (12090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:08,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3155 states to 3155 states and 12090 transitions. [2021-06-12 20:46:08,470 INFO L78 Accepts]: Start accepts. Automaton has 3155 states and 12090 transitions. Word has length 24 [2021-06-12 20:46:08,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:08,470 INFO L482 AbstractCegarLoop]: Abstraction has 3155 states and 12090 transitions. [2021-06-12 20:46:08,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:08,470 INFO L276 IsEmpty]: Start isEmpty. Operand 3155 states and 12090 transitions. [2021-06-12 20:46:08,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:46:08,474 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:08,474 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:08,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:08,675 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:46:08,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:08,675 INFO L82 PathProgramCache]: Analyzing trace with hash -147198670, now seen corresponding path program 191 times [2021-06-12 20:46:08,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:08,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105313078] [2021-06-12 20:46:08,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:08,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:08,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:08,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:08,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105313078] [2021-06-12 20:46:08,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105313078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:08,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236018094] [2021-06-12 20:46:08,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:08,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:46:08,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:08,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:46:08,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:08,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:46:08,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:08,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:08,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:08,942 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:46:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:09,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236018094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:09,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:09,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:46:09,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832365296] [2021-06-12 20:46:09,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:46:09,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:09,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:46:09,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:46:09,003 INFO L87 Difference]: Start difference. First operand 3155 states and 12090 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:10,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:10,468 INFO L93 Difference]: Finished difference Result 3946 states and 14542 transitions. [2021-06-12 20:46:10,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 20:46:10,469 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:46:10,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:10,475 INFO L225 Difference]: With dead ends: 3946 [2021-06-12 20:46:10,475 INFO L226 Difference]: Without dead ends: 3935 [2021-06-12 20:46:10,475 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 1247.9ms TimeCoverageRelationStatistics Valid=476, Invalid=2386, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 20:46:10,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3935 states. [2021-06-12 20:46:10,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3935 to 3159. [2021-06-12 20:46:10,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3159 states, 3158 states have (on average 3.8331222292590246) internal successors, (12105), 3158 states have internal predecessors, (12105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:10,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3159 states to 3159 states and 12105 transitions. [2021-06-12 20:46:10,526 INFO L78 Accepts]: Start accepts. Automaton has 3159 states and 12105 transitions. Word has length 24 [2021-06-12 20:46:10,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:10,526 INFO L482 AbstractCegarLoop]: Abstraction has 3159 states and 12105 transitions. [2021-06-12 20:46:10,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:10,526 INFO L276 IsEmpty]: Start isEmpty. Operand 3159 states and 12105 transitions. [2021-06-12 20:46:10,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:46:10,531 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:10,531 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:10,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:10,731 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:46:10,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:10,731 INFO L82 PathProgramCache]: Analyzing trace with hash 832215778, now seen corresponding path program 192 times [2021-06-12 20:46:10,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:10,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109454335] [2021-06-12 20:46:10,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:10,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:10,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:10,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109454335] [2021-06-12 20:46:10,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109454335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:10,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343211663] [2021-06-12 20:46:10,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:10,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:46:10,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:10,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:46:10,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:10,998 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:10,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:46:10,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:11,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:11,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:11,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-12 20:46:11,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:11,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343211663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:11,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:11,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:46:11,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359610616] [2021-06-12 20:46:11,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:46:11,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:11,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:46:11,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:46:11,120 INFO L87 Difference]: Start difference. First operand 3159 states and 12105 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:11,479 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-06-12 20:46:11,731 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-06-12 20:46:13,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:13,410 INFO L93 Difference]: Finished difference Result 3997 states and 14609 transitions. [2021-06-12 20:46:13,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 20:46:13,410 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:46:13,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:13,417 INFO L225 Difference]: With dead ends: 3997 [2021-06-12 20:46:13,417 INFO L226 Difference]: Without dead ends: 3979 [2021-06-12 20:46:13,418 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 1905.8ms TimeCoverageRelationStatistics Valid=726, Invalid=3966, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 20:46:13,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3979 states. [2021-06-12 20:46:13,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3979 to 3159. [2021-06-12 20:46:13,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3159 states, 3158 states have (on average 3.8331222292590246) internal successors, (12105), 3158 states have internal predecessors, (12105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:13,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3159 states to 3159 states and 12105 transitions. [2021-06-12 20:46:13,467 INFO L78 Accepts]: Start accepts. Automaton has 3159 states and 12105 transitions. Word has length 24 [2021-06-12 20:46:13,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:13,467 INFO L482 AbstractCegarLoop]: Abstraction has 3159 states and 12105 transitions. [2021-06-12 20:46:13,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:13,467 INFO L276 IsEmpty]: Start isEmpty. Operand 3159 states and 12105 transitions. [2021-06-12 20:46:13,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:46:13,472 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:13,472 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:13,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:13,672 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:46:13,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:13,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1741961320, now seen corresponding path program 193 times [2021-06-12 20:46:13,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:13,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628555511] [2021-06-12 20:46:13,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:13,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:13,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:13,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628555511] [2021-06-12 20:46:13,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628555511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:13,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103533026] [2021-06-12 20:46:13,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:13,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:13,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:46:13,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:13,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:46:13,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:13,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:13,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:13,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:46:13,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:13,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103533026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:13,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:13,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:46:13,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089459402] [2021-06-12 20:46:13,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:46:13,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:13,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:46:13,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:46:13,991 INFO L87 Difference]: Start difference. First operand 3159 states and 12105 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:15,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:15,357 INFO L93 Difference]: Finished difference Result 3790 states and 14033 transitions. [2021-06-12 20:46:15,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 20:46:15,357 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:46:15,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:15,363 INFO L225 Difference]: With dead ends: 3790 [2021-06-12 20:46:15,363 INFO L226 Difference]: Without dead ends: 3779 [2021-06-12 20:46:15,363 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1147.0ms TimeCoverageRelationStatistics Valid=476, Invalid=2494, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 20:46:15,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3779 states. [2021-06-12 20:46:15,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3779 to 3156. [2021-06-12 20:46:15,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3156 states, 3155 states have (on average 3.8339144215530903) internal successors, (12096), 3155 states have internal predecessors, (12096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:15,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3156 states to 3156 states and 12096 transitions. [2021-06-12 20:46:15,406 INFO L78 Accepts]: Start accepts. Automaton has 3156 states and 12096 transitions. Word has length 24 [2021-06-12 20:46:15,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:15,419 INFO L482 AbstractCegarLoop]: Abstraction has 3156 states and 12096 transitions. [2021-06-12 20:46:15,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:15,419 INFO L276 IsEmpty]: Start isEmpty. Operand 3156 states and 12096 transitions. [2021-06-12 20:46:15,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:46:15,424 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:15,424 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:15,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable612 [2021-06-12 20:46:15,625 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:46:15,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:15,625 INFO L82 PathProgramCache]: Analyzing trace with hash -792728518, now seen corresponding path program 102 times [2021-06-12 20:46:15,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:15,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974618633] [2021-06-12 20:46:15,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:15,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:15,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:15,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:15,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974618633] [2021-06-12 20:46:15,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974618633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:15,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395674113] [2021-06-12 20:46:15,773 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:15,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:46:15,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:15,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:46:15,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:15,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:15,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-12 20:46:15,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:15,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:15,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:15,932 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-12 20:46:15,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:15,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395674113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:15,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:15,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:46:15,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050915538] [2021-06-12 20:46:15,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:46:15,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:15,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:46:15,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:46:15,994 INFO L87 Difference]: Start difference. First operand 3156 states and 12096 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:19,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:19,036 INFO L93 Difference]: Finished difference Result 4497 states and 16284 transitions. [2021-06-12 20:46:19,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-12 20:46:19,036 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:46:19,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:19,043 INFO L225 Difference]: With dead ends: 4497 [2021-06-12 20:46:19,043 INFO L226 Difference]: Without dead ends: 4464 [2021-06-12 20:46:19,044 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2509 ImplicationChecksByTransitivity, 2588.5ms TimeCoverageRelationStatistics Valid=1071, Invalid=6069, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 20:46:19,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4464 states. [2021-06-12 20:46:19,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4464 to 3272. [2021-06-12 20:46:19,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3272 states, 3271 states have (on average 3.8514215836135737) internal successors, (12598), 3271 states have internal predecessors, (12598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:19,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3272 states to 3272 states and 12598 transitions. [2021-06-12 20:46:19,092 INFO L78 Accepts]: Start accepts. Automaton has 3272 states and 12598 transitions. Word has length 24 [2021-06-12 20:46:19,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:19,092 INFO L482 AbstractCegarLoop]: Abstraction has 3272 states and 12598 transitions. [2021-06-12 20:46:19,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:19,092 INFO L276 IsEmpty]: Start isEmpty. Operand 3272 states and 12598 transitions. [2021-06-12 20:46:19,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:46:19,096 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:19,096 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:19,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-06-12 20:46:19,297 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:46:19,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:19,297 INFO L82 PathProgramCache]: Analyzing trace with hash -997646652, now seen corresponding path program 194 times [2021-06-12 20:46:19,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:19,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427335370] [2021-06-12 20:46:19,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:19,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:19,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:19,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:19,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427335370] [2021-06-12 20:46:19,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427335370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:19,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108235136] [2021-06-12 20:46:19,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:19,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:46:19,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:19,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:46:19,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:19,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:19,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-12 20:46:19,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:19,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:19,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:19,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-12 20:46:19,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:19,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108235136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:19,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:19,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:46:19,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620852307] [2021-06-12 20:46:19,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:46:19,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:19,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:46:19,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:46:19,677 INFO L87 Difference]: Start difference. First operand 3272 states and 12598 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:22,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:22,226 INFO L93 Difference]: Finished difference Result 4691 states and 16892 transitions. [2021-06-12 20:46:22,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 20:46:22,226 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:46:22,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:22,234 INFO L225 Difference]: With dead ends: 4691 [2021-06-12 20:46:22,234 INFO L226 Difference]: Without dead ends: 4635 [2021-06-12 20:46:22,234 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2065 ImplicationChecksByTransitivity, 2151.5ms TimeCoverageRelationStatistics Valid=1006, Invalid=5000, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 20:46:22,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4635 states. [2021-06-12 20:46:22,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4635 to 3315. [2021-06-12 20:46:22,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3314 states have (on average 3.859987929993965) internal successors, (12792), 3314 states have internal predecessors, (12792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:22,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 12792 transitions. [2021-06-12 20:46:22,290 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 12792 transitions. Word has length 24 [2021-06-12 20:46:22,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:22,290 INFO L482 AbstractCegarLoop]: Abstraction has 3315 states and 12792 transitions. [2021-06-12 20:46:22,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:22,290 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 12792 transitions. [2021-06-12 20:46:22,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:46:22,295 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:22,295 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:22,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable615,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:22,495 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:46:22,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:22,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1420132378, now seen corresponding path program 195 times [2021-06-12 20:46:22,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:22,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304944799] [2021-06-12 20:46:22,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:22,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:22,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:22,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:22,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304944799] [2021-06-12 20:46:22,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304944799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:22,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607296090] [2021-06-12 20:46:22,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:22,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:46:22,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:22,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 20:46:22,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:22,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:22,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:22,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 56 [2021-06-12 20:46:22,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:22,895 INFO L628 ElimStorePlain]: treesize reduction 43, result has 56.6 percent of original size [2021-06-12 20:46:22,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:22,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:56 [2021-06-12 20:46:23,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:23,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607296090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:23,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:23,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:46:23,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921024759] [2021-06-12 20:46:23,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:46:23,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:23,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:46:23,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:46:23,058 INFO L87 Difference]: Start difference. First operand 3315 states and 12792 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:23,630 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2021-06-12 20:46:25,040 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-06-12 20:46:26,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:26,241 INFO L93 Difference]: Finished difference Result 4283 states and 15736 transitions. [2021-06-12 20:46:26,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 20:46:26,241 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:46:26,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:26,247 INFO L225 Difference]: With dead ends: 4283 [2021-06-12 20:46:26,248 INFO L226 Difference]: Without dead ends: 4266 [2021-06-12 20:46:26,248 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2141 ImplicationChecksByTransitivity, 2849.6ms TimeCoverageRelationStatistics Valid=891, Invalid=5429, Unknown=0, NotChecked=0, Total=6320 [2021-06-12 20:46:26,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4266 states. [2021-06-12 20:46:26,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4266 to 3331. [2021-06-12 20:46:26,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3331 states, 3330 states have (on average 3.863063063063063) internal successors, (12864), 3330 states have internal predecessors, (12864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:26,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3331 states to 3331 states and 12864 transitions. [2021-06-12 20:46:26,295 INFO L78 Accepts]: Start accepts. Automaton has 3331 states and 12864 transitions. Word has length 24 [2021-06-12 20:46:26,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:26,295 INFO L482 AbstractCegarLoop]: Abstraction has 3331 states and 12864 transitions. [2021-06-12 20:46:26,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:26,295 INFO L276 IsEmpty]: Start isEmpty. Operand 3331 states and 12864 transitions. [2021-06-12 20:46:26,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:46:26,299 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:26,299 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:26,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable617,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:26,499 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:46:26,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:26,500 INFO L82 PathProgramCache]: Analyzing trace with hash 265611744, now seen corresponding path program 196 times [2021-06-12 20:46:26,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:26,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576660111] [2021-06-12 20:46:26,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:26,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:26,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:26,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:26,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576660111] [2021-06-12 20:46:26,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576660111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:26,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399117273] [2021-06-12 20:46:26,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:26,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:46:26,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:26,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:46:26,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:26,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:46:26,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:26,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:26,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:26,791 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-12 20:46:26,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:26,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399117273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:26,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:26,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:46:26,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518463573] [2021-06-12 20:46:26,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:46:26,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:26,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:46:26,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:46:26,832 INFO L87 Difference]: Start difference. First operand 3331 states and 12864 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:28,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:28,970 INFO L93 Difference]: Finished difference Result 4180 states and 15490 transitions. [2021-06-12 20:46:28,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 20:46:28,971 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:46:28,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:28,977 INFO L225 Difference]: With dead ends: 4180 [2021-06-12 20:46:28,977 INFO L226 Difference]: Without dead ends: 4165 [2021-06-12 20:46:28,978 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1633 ImplicationChecksByTransitivity, 1782.0ms TimeCoverageRelationStatistics Valid=759, Invalid=3933, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 20:46:28,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4165 states. [2021-06-12 20:46:29,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4165 to 3335. [2021-06-12 20:46:29,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3335 states, 3334 states have (on average 3.8629274145170966) internal successors, (12879), 3334 states have internal predecessors, (12879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:29,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3335 states to 3335 states and 12879 transitions. [2021-06-12 20:46:29,024 INFO L78 Accepts]: Start accepts. Automaton has 3335 states and 12879 transitions. Word has length 24 [2021-06-12 20:46:29,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:29,024 INFO L482 AbstractCegarLoop]: Abstraction has 3335 states and 12879 transitions. [2021-06-12 20:46:29,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:29,024 INFO L276 IsEmpty]: Start isEmpty. Operand 3335 states and 12879 transitions. [2021-06-12 20:46:29,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:46:29,029 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:29,029 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:29,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:29,229 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:46:29,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:29,229 INFO L82 PathProgramCache]: Analyzing trace with hash -440717930, now seen corresponding path program 197 times [2021-06-12 20:46:29,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:29,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179545348] [2021-06-12 20:46:29,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:29,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:29,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:29,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:29,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179545348] [2021-06-12 20:46:29,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179545348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:29,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058602227] [2021-06-12 20:46:29,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:29,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:46:29,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:29,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:46:29,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:29,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:46:29,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:29,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:29,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:29,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-12 20:46:29,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:29,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058602227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:29,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:29,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:46:29,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906766750] [2021-06-12 20:46:29,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:46:29,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:29,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:46:29,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:46:29,559 INFO L87 Difference]: Start difference. First operand 3335 states and 12879 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:32,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:32,480 INFO L93 Difference]: Finished difference Result 4826 states and 17391 transitions. [2021-06-12 20:46:32,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-12 20:46:32,480 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:46:32,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:32,488 INFO L225 Difference]: With dead ends: 4826 [2021-06-12 20:46:32,488 INFO L226 Difference]: Without dead ends: 4795 [2021-06-12 20:46:32,488 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2712 ImplicationChecksByTransitivity, 2432.2ms TimeCoverageRelationStatistics Valid=1159, Invalid=6323, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 20:46:32,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4795 states. [2021-06-12 20:46:32,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4795 to 3365. [2021-06-12 20:46:32,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3365 states, 3364 states have (on average 3.8689060642092747) internal successors, (13015), 3364 states have internal predecessors, (13015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:32,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3365 states to 3365 states and 13015 transitions. [2021-06-12 20:46:32,539 INFO L78 Accepts]: Start accepts. Automaton has 3365 states and 13015 transitions. Word has length 24 [2021-06-12 20:46:32,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:32,540 INFO L482 AbstractCegarLoop]: Abstraction has 3365 states and 13015 transitions. [2021-06-12 20:46:32,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:32,540 INFO L276 IsEmpty]: Start isEmpty. Operand 3365 states and 13015 transitions. [2021-06-12 20:46:32,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:46:32,544 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:32,544 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:32,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:32,744 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:46:32,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:32,745 INFO L82 PathProgramCache]: Analyzing trace with hash -968550830, now seen corresponding path program 198 times [2021-06-12 20:46:32,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:32,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404367025] [2021-06-12 20:46:32,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:32,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:32,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:32,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:32,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404367025] [2021-06-12 20:46:32,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404367025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:32,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97138023] [2021-06-12 20:46:32,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:32,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:46:32,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:32,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 20:46:32,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:33,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:33,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:33,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:33,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 53 [2021-06-12 20:46:33,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:33,205 INFO L628 ElimStorePlain]: treesize reduction 16, result has 69.2 percent of original size [2021-06-12 20:46:33,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:33,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:41 [2021-06-12 20:46:33,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:33,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97138023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:33,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:33,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:46:33,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850993229] [2021-06-12 20:46:33,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:46:33,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:33,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:46:33,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:46:33,281 INFO L87 Difference]: Start difference. First operand 3365 states and 13015 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:36,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:36,229 INFO L93 Difference]: Finished difference Result 4795 states and 17888 transitions. [2021-06-12 20:46:36,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 20:46:36,229 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:46:36,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:36,251 INFO L225 Difference]: With dead ends: 4795 [2021-06-12 20:46:36,251 INFO L226 Difference]: Without dead ends: 4786 [2021-06-12 20:46:36,252 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 2355.9ms TimeCoverageRelationStatistics Valid=651, Invalid=3771, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 20:46:36,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4786 states. [2021-06-12 20:46:36,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4786 to 3369. [2021-06-12 20:46:36,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3369 states, 3368 states have (on average 3.8696555819477436) internal successors, (13033), 3368 states have internal predecessors, (13033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:36,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3369 states to 3369 states and 13033 transitions. [2021-06-12 20:46:36,299 INFO L78 Accepts]: Start accepts. Automaton has 3369 states and 13033 transitions. Word has length 24 [2021-06-12 20:46:36,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:36,300 INFO L482 AbstractCegarLoop]: Abstraction has 3369 states and 13033 transitions. [2021-06-12 20:46:36,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:36,300 INFO L276 IsEmpty]: Start isEmpty. Operand 3369 states and 13033 transitions. [2021-06-12 20:46:36,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:46:36,304 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:36,304 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:36,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable627 [2021-06-12 20:46:36,505 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:46:36,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:36,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1478066694, now seen corresponding path program 199 times [2021-06-12 20:46:36,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:36,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121807809] [2021-06-12 20:46:36,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:36,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:36,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:36,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:36,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121807809] [2021-06-12 20:46:36,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121807809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:36,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428793106] [2021-06-12 20:46:36,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:36,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:36,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:46:36,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:36,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:46:36,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:36,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:36,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:36,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-12 20:46:36,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:36,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428793106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:36,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:36,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:46:36,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585972700] [2021-06-12 20:46:36,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:46:36,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:36,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:46:36,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:46:36,895 INFO L87 Difference]: Start difference. First operand 3369 states and 13033 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:38,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:38,179 INFO L93 Difference]: Finished difference Result 4091 states and 15410 transitions. [2021-06-12 20:46:38,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:46:38,179 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:46:38,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:38,187 INFO L225 Difference]: With dead ends: 4091 [2021-06-12 20:46:38,187 INFO L226 Difference]: Without dead ends: 4082 [2021-06-12 20:46:38,187 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 947.7ms TimeCoverageRelationStatistics Valid=313, Invalid=1943, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:46:38,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2021-06-12 20:46:38,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 3374. [2021-06-12 20:46:38,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3374 states, 3373 states have (on average 3.868662911354877) internal successors, (13049), 3373 states have internal predecessors, (13049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:38,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3374 states to 3374 states and 13049 transitions. [2021-06-12 20:46:38,237 INFO L78 Accepts]: Start accepts. Automaton has 3374 states and 13049 transitions. Word has length 24 [2021-06-12 20:46:38,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:38,237 INFO L482 AbstractCegarLoop]: Abstraction has 3374 states and 13049 transitions. [2021-06-12 20:46:38,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:38,237 INFO L276 IsEmpty]: Start isEmpty. Operand 3374 states and 13049 transitions. [2021-06-12 20:46:38,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:46:38,242 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:38,242 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:38,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable633,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:38,443 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:46:38,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:38,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1687604074, now seen corresponding path program 200 times [2021-06-12 20:46:38,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:38,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81214038] [2021-06-12 20:46:38,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:38,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:38,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:38,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:38,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81214038] [2021-06-12 20:46:38,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81214038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:38,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806381345] [2021-06-12 20:46:38,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:38,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:46:38,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:38,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:46:38,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:38,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:38,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:38,828 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:38,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-06-12 20:46:38,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:46:38,850 INFO L628 ElimStorePlain]: treesize reduction 25, result has 46.8 percent of original size [2021-06-12 20:46:38,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:38,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-06-12 20:46:38,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:38,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806381345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:38,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:38,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:46:38,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456929323] [2021-06-12 20:46:38,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:46:38,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:38,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:46:38,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:46:38,908 INFO L87 Difference]: Start difference. First operand 3374 states and 13049 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:40,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:40,319 INFO L93 Difference]: Finished difference Result 3999 states and 15033 transitions. [2021-06-12 20:46:40,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 20:46:40,319 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:46:40,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:40,325 INFO L225 Difference]: With dead ends: 3999 [2021-06-12 20:46:40,325 INFO L226 Difference]: Without dead ends: 3981 [2021-06-12 20:46:40,325 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1145.9ms TimeCoverageRelationStatistics Valid=400, Invalid=2462, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 20:46:40,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3981 states. [2021-06-12 20:46:40,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3981 to 3388. [2021-06-12 20:46:40,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3388 states, 3387 states have (on average 3.8665485680543252) internal successors, (13096), 3387 states have internal predecessors, (13096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:40,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 13096 transitions. [2021-06-12 20:46:40,367 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 13096 transitions. Word has length 24 [2021-06-12 20:46:40,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:40,368 INFO L482 AbstractCegarLoop]: Abstraction has 3388 states and 13096 transitions. [2021-06-12 20:46:40,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:40,368 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 13096 transitions. [2021-06-12 20:46:40,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:46:40,372 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:40,372 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:40,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable634 [2021-06-12 20:46:40,572 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:46:40,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:40,573 INFO L82 PathProgramCache]: Analyzing trace with hash 41067672, now seen corresponding path program 201 times [2021-06-12 20:46:40,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:40,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061213544] [2021-06-12 20:46:40,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:40,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:40,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:40,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:40,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061213544] [2021-06-12 20:46:40,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061213544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:40,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39449870] [2021-06-12 20:46:40,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:40,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:46:40,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:40,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:46:40,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:40,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:40,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-12 20:46:40,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:40,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:40,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:40,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-12 20:46:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:41,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39449870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:41,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:41,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:46:41,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411964012] [2021-06-12 20:46:41,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:46:41,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:41,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:46:41,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:46:41,029 INFO L87 Difference]: Start difference. First operand 3388 states and 13096 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:43,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:43,124 INFO L93 Difference]: Finished difference Result 4200 states and 15720 transitions. [2021-06-12 20:46:43,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 20:46:43,125 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:46:43,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:43,131 INFO L225 Difference]: With dead ends: 4200 [2021-06-12 20:46:43,132 INFO L226 Difference]: Without dead ends: 4181 [2021-06-12 20:46:43,132 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1625.6ms TimeCoverageRelationStatistics Valid=485, Invalid=3055, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 20:46:43,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2021-06-12 20:46:43,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 3383. [2021-06-12 20:46:43,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3383 states, 3382 states have (on average 3.868125369603785) internal successors, (13082), 3382 states have internal predecessors, (13082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:43,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3383 states to 3383 states and 13082 transitions. [2021-06-12 20:46:43,182 INFO L78 Accepts]: Start accepts. Automaton has 3383 states and 13082 transitions. Word has length 24 [2021-06-12 20:46:43,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:43,182 INFO L482 AbstractCegarLoop]: Abstraction has 3383 states and 13082 transitions. [2021-06-12 20:46:43,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:43,182 INFO L276 IsEmpty]: Start isEmpty. Operand 3383 states and 13082 transitions. [2021-06-12 20:46:43,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:46:43,187 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:43,187 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:43,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable638,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:43,387 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:46:43,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:43,387 INFO L82 PathProgramCache]: Analyzing trace with hash -987082188, now seen corresponding path program 202 times [2021-06-12 20:46:43,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:43,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629875318] [2021-06-12 20:46:43,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:43,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:43,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:43,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:43,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629875318] [2021-06-12 20:46:43,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629875318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:43,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891837387] [2021-06-12 20:46:43,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:43,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:46:43,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:43,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:46:43,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:43,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:46:43,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:43,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:43,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:43,701 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:46:43,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:43,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891837387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:43,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:43,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:46:43,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286041651] [2021-06-12 20:46:43,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:46:43,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:43,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:46:43,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:46:43,741 INFO L87 Difference]: Start difference. First operand 3383 states and 13082 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:44,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:44,704 INFO L93 Difference]: Finished difference Result 4061 states and 15309 transitions. [2021-06-12 20:46:44,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:46:44,704 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:46:44,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:44,711 INFO L225 Difference]: With dead ends: 4061 [2021-06-12 20:46:44,711 INFO L226 Difference]: Without dead ends: 4052 [2021-06-12 20:46:44,711 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 835.7ms TimeCoverageRelationStatistics Valid=279, Invalid=1613, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:46:44,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4052 states. [2021-06-12 20:46:44,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4052 to 3392. [2021-06-12 20:46:44,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3392 states, 3391 states have (on average 3.8661161899144796) internal successors, (13110), 3391 states have internal predecessors, (13110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:44,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3392 states to 3392 states and 13110 transitions. [2021-06-12 20:46:44,775 INFO L78 Accepts]: Start accepts. Automaton has 3392 states and 13110 transitions. Word has length 24 [2021-06-12 20:46:44,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:44,775 INFO L482 AbstractCegarLoop]: Abstraction has 3392 states and 13110 transitions. [2021-06-12 20:46:44,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:44,775 INFO L276 IsEmpty]: Start isEmpty. Operand 3392 states and 13110 transitions. [2021-06-12 20:46:44,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:46:44,779 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:44,779 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:44,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable641,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:44,980 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:46:44,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:44,980 INFO L82 PathProgramCache]: Analyzing trace with hash -663496010, now seen corresponding path program 203 times [2021-06-12 20:46:44,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:44,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375766731] [2021-06-12 20:46:44,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:45,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:45,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:45,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375766731] [2021-06-12 20:46:45,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375766731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:45,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288784609] [2021-06-12 20:46:45,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:45,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:46:45,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:45,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:46:45,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:45,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:46:45,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:45,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:45,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:45,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:46:45,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:45,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288784609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:45,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:45,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:46:45,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087073394] [2021-06-12 20:46:45,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:46:45,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:45,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:46:45,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:46:45,328 INFO L87 Difference]: Start difference. First operand 3392 states and 13110 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:46,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:46,411 INFO L93 Difference]: Finished difference Result 4052 states and 15285 transitions. [2021-06-12 20:46:46,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:46:46,411 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:46:46,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:46,416 INFO L225 Difference]: With dead ends: 4052 [2021-06-12 20:46:46,416 INFO L226 Difference]: Without dead ends: 4041 [2021-06-12 20:46:46,416 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 890.6ms TimeCoverageRelationStatistics Valid=282, Invalid=1880, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:46:46,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4041 states. [2021-06-12 20:46:46,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4041 to 3382. [2021-06-12 20:46:46,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3382 states, 3381 states have (on average 3.868086364980775) internal successors, (13078), 3381 states have internal predecessors, (13078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:46,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3382 states to 3382 states and 13078 transitions. [2021-06-12 20:46:46,458 INFO L78 Accepts]: Start accepts. Automaton has 3382 states and 13078 transitions. Word has length 24 [2021-06-12 20:46:46,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:46,458 INFO L482 AbstractCegarLoop]: Abstraction has 3382 states and 13078 transitions. [2021-06-12 20:46:46,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:46,459 INFO L276 IsEmpty]: Start isEmpty. Operand 3382 states and 13078 transitions. [2021-06-12 20:46:46,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:46:46,463 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:46,463 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:46,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable642 [2021-06-12 20:46:46,663 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:46:46,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:46,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1788704418, now seen corresponding path program 204 times [2021-06-12 20:46:46,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:46,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132586545] [2021-06-12 20:46:46,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:46,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:46,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:46,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:46,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132586545] [2021-06-12 20:46:46,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132586545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:46,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215212693] [2021-06-12 20:46:46,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:46,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:46:46,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:46,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 20:46:46,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:47,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:47,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:46:47,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:47,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 53 [2021-06-12 20:46:47,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:47,096 INFO L628 ElimStorePlain]: treesize reduction 16, result has 69.2 percent of original size [2021-06-12 20:46:47,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:47,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:41 [2021-06-12 20:46:47,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:47,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215212693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:47,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:47,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:46:47,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430772558] [2021-06-12 20:46:47,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:46:47,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:47,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:46:47,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:46:47,171 INFO L87 Difference]: Start difference. First operand 3382 states and 13078 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:51,347 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-06-12 20:46:54,480 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-06-12 20:46:54,800 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-06-12 20:46:54,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:54,942 INFO L93 Difference]: Finished difference Result 6012 states and 21882 transitions. [2021-06-12 20:46:54,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 20:46:54,942 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:46:54,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:54,951 INFO L225 Difference]: With dead ends: 6012 [2021-06-12 20:46:54,951 INFO L226 Difference]: Without dead ends: 5983 [2021-06-12 20:46:54,952 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2708 ImplicationChecksByTransitivity, 4706.3ms TimeCoverageRelationStatistics Valid=1268, Invalid=6742, Unknown=0, NotChecked=0, Total=8010 [2021-06-12 20:46:54,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5983 states. [2021-06-12 20:46:55,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5983 to 3413. [2021-06-12 20:46:55,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3413 states, 3412 states have (on average 3.8710433763188745) internal successors, (13208), 3412 states have internal predecessors, (13208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:55,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 13208 transitions. [2021-06-12 20:46:55,009 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 13208 transitions. Word has length 24 [2021-06-12 20:46:55,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:55,009 INFO L482 AbstractCegarLoop]: Abstraction has 3413 states and 13208 transitions. [2021-06-12 20:46:55,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:55,010 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 13208 transitions. [2021-06-12 20:46:55,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:46:55,014 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:55,014 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:55,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable643,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:55,215 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:46:55,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:55,215 INFO L82 PathProgramCache]: Analyzing trace with hash -52244372, now seen corresponding path program 205 times [2021-06-12 20:46:55,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:55,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617759061] [2021-06-12 20:46:55,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:55,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:55,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:55,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:55,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617759061] [2021-06-12 20:46:55,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617759061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:55,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984872218] [2021-06-12 20:46:55,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:55,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:55,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:46:55,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:55,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:46:55,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:55,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:55,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:55,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:46:55,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:55,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984872218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:55,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:55,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:46:55,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903620399] [2021-06-12 20:46:55,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:46:55,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:55,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:46:55,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:46:55,619 INFO L87 Difference]: Start difference. First operand 3413 states and 13208 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:57,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:46:57,786 INFO L93 Difference]: Finished difference Result 4406 states and 16378 transitions. [2021-06-12 20:46:57,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 20:46:57,786 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:46:57,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:46:57,793 INFO L225 Difference]: With dead ends: 4406 [2021-06-12 20:46:57,793 INFO L226 Difference]: Without dead ends: 4388 [2021-06-12 20:46:57,793 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 1626.8ms TimeCoverageRelationStatistics Valid=535, Invalid=3371, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 20:46:57,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4388 states. [2021-06-12 20:46:57,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4388 to 3416. [2021-06-12 20:46:57,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3416 states, 3415 states have (on average 3.8699853587115665) internal successors, (13216), 3415 states have internal predecessors, (13216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:57,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3416 states to 3416 states and 13216 transitions. [2021-06-12 20:46:57,841 INFO L78 Accepts]: Start accepts. Automaton has 3416 states and 13216 transitions. Word has length 24 [2021-06-12 20:46:57,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:46:57,841 INFO L482 AbstractCegarLoop]: Abstraction has 3416 states and 13216 transitions. [2021-06-12 20:46:57,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:46:57,841 INFO L276 IsEmpty]: Start isEmpty. Operand 3416 states and 13216 transitions. [2021-06-12 20:46:57,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:46:57,845 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:46:57,845 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:46:58,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable650 [2021-06-12 20:46:58,046 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:46:58,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:46:58,046 INFO L82 PathProgramCache]: Analyzing trace with hash 2090131316, now seen corresponding path program 206 times [2021-06-12 20:46:58,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:46:58,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456525837] [2021-06-12 20:46:58,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:46:58,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:46:58,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:58,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:46:58,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456525837] [2021-06-12 20:46:58,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456525837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:58,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770222747] [2021-06-12 20:46:58,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:46:58,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:46:58,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:46:58,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:46:58,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:46:58,423 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:58,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-12 20:46:58,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:46:58,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:46:58,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:46:58,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-12 20:46:58,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:46:58,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770222747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:46:58,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:46:58,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:46:58,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335477203] [2021-06-12 20:46:58,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:46:58,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:46:58,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:46:58,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:46:58,501 INFO L87 Difference]: Start difference. First operand 3416 states and 13216 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:00,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:00,957 INFO L93 Difference]: Finished difference Result 4399 states and 16319 transitions. [2021-06-12 20:47:00,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 20:47:00,957 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:47:00,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:00,965 INFO L225 Difference]: With dead ends: 4399 [2021-06-12 20:47:00,965 INFO L226 Difference]: Without dead ends: 4370 [2021-06-12 20:47:00,965 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2039.3ms TimeCoverageRelationStatistics Valid=553, Invalid=3107, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 20:47:00,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4370 states. [2021-06-12 20:47:01,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4370 to 3419. [2021-06-12 20:47:01,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3419 states, 3418 states have (on average 3.868929198361615) internal successors, (13224), 3418 states have internal predecessors, (13224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:01,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3419 states to 3419 states and 13224 transitions. [2021-06-12 20:47:01,019 INFO L78 Accepts]: Start accepts. Automaton has 3419 states and 13224 transitions. Word has length 24 [2021-06-12 20:47:01,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:01,019 INFO L482 AbstractCegarLoop]: Abstraction has 3419 states and 13224 transitions. [2021-06-12 20:47:01,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:01,019 INFO L276 IsEmpty]: Start isEmpty. Operand 3419 states and 13224 transitions. [2021-06-12 20:47:01,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:47:01,024 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:01,024 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:01,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable651 [2021-06-12 20:47:01,237 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:47:01,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:01,237 INFO L82 PathProgramCache]: Analyzing trace with hash -268592468, now seen corresponding path program 207 times [2021-06-12 20:47:01,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:01,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714948048] [2021-06-12 20:47:01,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:01,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:01,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:01,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:01,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714948048] [2021-06-12 20:47:01,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714948048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:01,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321992032] [2021-06-12 20:47:01,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:01,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:47:01,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:01,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:47:01,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:01,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:01,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:01,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:47:01,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:01,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:01,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:01,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 20:47:01,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:01,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321992032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:01,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:01,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:47:01,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559959549] [2021-06-12 20:47:01,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:47:01,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:01,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:47:01,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:47:01,747 INFO L87 Difference]: Start difference. First operand 3419 states and 13224 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:03,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:03,852 INFO L93 Difference]: Finished difference Result 4271 states and 15932 transitions. [2021-06-12 20:47:03,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 20:47:03,852 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:47:03,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:03,859 INFO L225 Difference]: With dead ends: 4271 [2021-06-12 20:47:03,859 INFO L226 Difference]: Without dead ends: 4242 [2021-06-12 20:47:03,859 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1728.0ms TimeCoverageRelationStatistics Valid=505, Invalid=3035, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 20:47:03,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4242 states. [2021-06-12 20:47:03,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4242 to 3415. [2021-06-12 20:47:03,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3415 states, 3414 states have (on average 3.87111892208553) internal successors, (13216), 3414 states have internal predecessors, (13216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:03,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3415 states to 3415 states and 13216 transitions. [2021-06-12 20:47:03,907 INFO L78 Accepts]: Start accepts. Automaton has 3415 states and 13216 transitions. Word has length 24 [2021-06-12 20:47:03,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:03,908 INFO L482 AbstractCegarLoop]: Abstraction has 3415 states and 13216 transitions. [2021-06-12 20:47:03,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:03,908 INFO L276 IsEmpty]: Start isEmpty. Operand 3415 states and 13216 transitions. [2021-06-12 20:47:03,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:47:03,912 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:03,912 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:04,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable654 [2021-06-12 20:47:04,112 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:47:04,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:04,113 INFO L82 PathProgramCache]: Analyzing trace with hash -445133900, now seen corresponding path program 208 times [2021-06-12 20:47:04,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:04,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354991893] [2021-06-12 20:47:04,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:04,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:04,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:04,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:04,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354991893] [2021-06-12 20:47:04,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354991893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:04,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507457829] [2021-06-12 20:47:04,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:04,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:47:04,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:04,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:47:04,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:04,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:47:04,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:04,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:04,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:04,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:47:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:04,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507457829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:04,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:04,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:47:04,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470471311] [2021-06-12 20:47:04,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:47:04,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:04,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:47:04,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:47:04,470 INFO L87 Difference]: Start difference. First operand 3415 states and 13216 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:05,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:05,395 INFO L93 Difference]: Finished difference Result 4098 states and 15416 transitions. [2021-06-12 20:47:05,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:47:05,395 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:47:05,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:05,401 INFO L225 Difference]: With dead ends: 4098 [2021-06-12 20:47:05,401 INFO L226 Difference]: Without dead ends: 4089 [2021-06-12 20:47:05,401 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 810.4ms TimeCoverageRelationStatistics Valid=276, Invalid=1364, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:47:05,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4089 states. [2021-06-12 20:47:05,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4089 to 3420. [2021-06-12 20:47:05,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3420 states, 3419 states have (on average 3.869552500731208) internal successors, (13230), 3419 states have internal predecessors, (13230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:05,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3420 states to 3420 states and 13230 transitions. [2021-06-12 20:47:05,447 INFO L78 Accepts]: Start accepts. Automaton has 3420 states and 13230 transitions. Word has length 24 [2021-06-12 20:47:05,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:05,447 INFO L482 AbstractCegarLoop]: Abstraction has 3420 states and 13230 transitions. [2021-06-12 20:47:05,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:05,447 INFO L276 IsEmpty]: Start isEmpty. Operand 3420 states and 13230 transitions. [2021-06-12 20:47:05,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:47:05,452 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:05,452 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:05,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable655,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:05,652 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:47:05,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:05,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1278872340, now seen corresponding path program 209 times [2021-06-12 20:47:05,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:05,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830670685] [2021-06-12 20:47:05,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:05,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:05,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:05,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:05,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830670685] [2021-06-12 20:47:05,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830670685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:05,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705996674] [2021-06-12 20:47:05,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:05,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:47:05,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:05,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:47:05,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:05,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:47:05,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:05,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:05,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:05,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:47:06,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:06,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705996674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:06,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:06,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:47:06,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165971339] [2021-06-12 20:47:06,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:47:06,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:06,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:47:06,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:47:06,022 INFO L87 Difference]: Start difference. First operand 3420 states and 13230 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:07,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:07,036 INFO L93 Difference]: Finished difference Result 4071 states and 15334 transitions. [2021-06-12 20:47:07,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:47:07,036 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:47:07,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:07,042 INFO L225 Difference]: With dead ends: 4071 [2021-06-12 20:47:07,042 INFO L226 Difference]: Without dead ends: 4061 [2021-06-12 20:47:07,042 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 863.7ms TimeCoverageRelationStatistics Valid=272, Invalid=1450, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:47:07,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4061 states. [2021-06-12 20:47:07,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4061 to 3413. [2021-06-12 20:47:07,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3413 states, 3412 states have (on average 3.8710433763188745) internal successors, (13208), 3412 states have internal predecessors, (13208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:07,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 13208 transitions. [2021-06-12 20:47:07,099 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 13208 transitions. Word has length 24 [2021-06-12 20:47:07,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:07,099 INFO L482 AbstractCegarLoop]: Abstraction has 3413 states and 13208 transitions. [2021-06-12 20:47:07,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:07,099 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 13208 transitions. [2021-06-12 20:47:07,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:47:07,104 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:07,104 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:07,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable656 [2021-06-12 20:47:07,305 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:47:07,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:07,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1156910420, now seen corresponding path program 210 times [2021-06-12 20:47:07,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:07,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143885886] [2021-06-12 20:47:07,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:07,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:07,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:07,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:07,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143885886] [2021-06-12 20:47:07,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143885886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:07,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224538527] [2021-06-12 20:47:07,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:07,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:47:07,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:07,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 20:47:07,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:07,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:07,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:07,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:07,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 53 [2021-06-12 20:47:07,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:08,026 INFO L628 ElimStorePlain]: treesize reduction 46, result has 43.9 percent of original size [2021-06-12 20:47:08,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:08,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:41 [2021-06-12 20:47:08,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:08,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224538527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:08,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:08,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 20:47:08,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733283054] [2021-06-12 20:47:08,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:47:08,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:08,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:47:08,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:47:08,100 INFO L87 Difference]: Start difference. First operand 3413 states and 13208 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:09,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:09,259 INFO L93 Difference]: Finished difference Result 3889 states and 14696 transitions. [2021-06-12 20:47:09,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:47:09,259 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:47:09,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:09,265 INFO L225 Difference]: With dead ends: 3889 [2021-06-12 20:47:09,265 INFO L226 Difference]: Without dead ends: 3880 [2021-06-12 20:47:09,265 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1202.7ms TimeCoverageRelationStatistics Valid=361, Invalid=1445, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:47:09,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3880 states. [2021-06-12 20:47:09,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3880 to 3413. [2021-06-12 20:47:09,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3413 states, 3412 states have (on average 3.8710433763188745) internal successors, (13208), 3412 states have internal predecessors, (13208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:09,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 13208 transitions. [2021-06-12 20:47:09,309 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 13208 transitions. Word has length 24 [2021-06-12 20:47:09,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:09,310 INFO L482 AbstractCegarLoop]: Abstraction has 3413 states and 13208 transitions. [2021-06-12 20:47:09,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:09,310 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 13208 transitions. [2021-06-12 20:47:09,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:47:09,314 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:09,314 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:09,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable657,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:09,514 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:47:09,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:09,515 INFO L82 PathProgramCache]: Analyzing trace with hash 362223946, now seen corresponding path program 211 times [2021-06-12 20:47:09,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:09,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014976400] [2021-06-12 20:47:09,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:09,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:09,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:09,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:09,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014976400] [2021-06-12 20:47:09,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014976400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:09,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897474381] [2021-06-12 20:47:09,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:09,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:09,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:47:09,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:09,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:47:09,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:09,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:09,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:09,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:47:09,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:09,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897474381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:09,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:09,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:47:09,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591470621] [2021-06-12 20:47:09,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:47:09,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:09,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:47:09,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:47:09,888 INFO L87 Difference]: Start difference. First operand 3413 states and 13208 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:11,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:11,025 INFO L93 Difference]: Finished difference Result 3907 states and 14738 transitions. [2021-06-12 20:47:11,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:47:11,025 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:47:11,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:11,031 INFO L225 Difference]: With dead ends: 3907 [2021-06-12 20:47:11,031 INFO L226 Difference]: Without dead ends: 3897 [2021-06-12 20:47:11,032 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 929.8ms TimeCoverageRelationStatistics Valid=284, Invalid=1608, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:47:11,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3897 states. [2021-06-12 20:47:11,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3897 to 3413. [2021-06-12 20:47:11,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3413 states, 3412 states have (on average 3.8710433763188745) internal successors, (13208), 3412 states have internal predecessors, (13208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:11,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 13208 transitions. [2021-06-12 20:47:11,078 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 13208 transitions. Word has length 24 [2021-06-12 20:47:11,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:11,078 INFO L482 AbstractCegarLoop]: Abstraction has 3413 states and 13208 transitions. [2021-06-12 20:47:11,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:11,078 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 13208 transitions. [2021-06-12 20:47:11,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:47:11,083 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:11,083 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:11,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable663 [2021-06-12 20:47:11,283 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:47:11,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:11,283 INFO L82 PathProgramCache]: Analyzing trace with hash -665925914, now seen corresponding path program 212 times [2021-06-12 20:47:11,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:11,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387088967] [2021-06-12 20:47:11,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:11,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:11,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:11,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:11,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387088967] [2021-06-12 20:47:11,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387088967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:11,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004608507] [2021-06-12 20:47:11,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:11,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:47:11,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:11,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:47:11,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:11,603 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:11,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:47:11,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:11,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:11,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:11,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:47:11,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:11,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004608507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:11,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:11,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:47:11,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832794917] [2021-06-12 20:47:11,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:47:11,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:11,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:47:11,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:47:11,704 INFO L87 Difference]: Start difference. First operand 3413 states and 13208 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:12,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:12,548 INFO L93 Difference]: Finished difference Result 3822 states and 14477 transitions. [2021-06-12 20:47:12,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:47:12,548 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:47:12,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:12,554 INFO L225 Difference]: With dead ends: 3822 [2021-06-12 20:47:12,554 INFO L226 Difference]: Without dead ends: 3813 [2021-06-12 20:47:12,554 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 776.6ms TimeCoverageRelationStatistics Valid=247, Invalid=1313, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:47:12,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2021-06-12 20:47:12,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 3417. [2021-06-12 20:47:12,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3417 states, 3416 states have (on average 3.870023419203747) internal successors, (13220), 3416 states have internal predecessors, (13220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:12,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 13220 transitions. [2021-06-12 20:47:12,598 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 13220 transitions. Word has length 24 [2021-06-12 20:47:12,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:12,598 INFO L482 AbstractCegarLoop]: Abstraction has 3417 states and 13220 transitions. [2021-06-12 20:47:12,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:12,599 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 13220 transitions. [2021-06-12 20:47:12,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:47:12,603 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:12,603 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:12,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable664 [2021-06-12 20:47:12,803 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:47:12,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:12,803 INFO L82 PathProgramCache]: Analyzing trace with hash -342339736, now seen corresponding path program 213 times [2021-06-12 20:47:12,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:12,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985767783] [2021-06-12 20:47:12,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:12,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:12,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:12,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985767783] [2021-06-12 20:47:12,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985767783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:12,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712737576] [2021-06-12 20:47:12,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:13,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:47:13,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:13,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 20:47:13,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:13,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:13,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-12 20:47:13,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:13,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:13,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:13,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:37 [2021-06-12 20:47:13,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:13,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712737576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:13,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:13,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:47:13,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512879764] [2021-06-12 20:47:13,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:47:13,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:13,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:47:13,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:47:13,354 INFO L87 Difference]: Start difference. First operand 3417 states and 13220 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:15,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:15,015 INFO L93 Difference]: Finished difference Result 3831 states and 14475 transitions. [2021-06-12 20:47:15,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:47:15,015 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:47:15,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:15,021 INFO L225 Difference]: With dead ends: 3831 [2021-06-12 20:47:15,021 INFO L226 Difference]: Without dead ends: 3822 [2021-06-12 20:47:15,021 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1560.7ms TimeCoverageRelationStatistics Valid=356, Invalid=2094, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:47:15,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2021-06-12 20:47:15,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 3419. [2021-06-12 20:47:15,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3419 states, 3418 states have (on average 3.8695143358689292) internal successors, (13226), 3418 states have internal predecessors, (13226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:15,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3419 states to 3419 states and 13226 transitions. [2021-06-12 20:47:15,065 INFO L78 Accepts]: Start accepts. Automaton has 3419 states and 13226 transitions. Word has length 24 [2021-06-12 20:47:15,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:15,065 INFO L482 AbstractCegarLoop]: Abstraction has 3419 states and 13226 transitions. [2021-06-12 20:47:15,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:15,065 INFO L276 IsEmpty]: Start isEmpty. Operand 3419 states and 13226 transitions. [2021-06-12 20:47:15,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:47:15,070 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:15,070 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:15,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable666 [2021-06-12 20:47:15,270 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:47:15,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:15,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1343404386, now seen corresponding path program 214 times [2021-06-12 20:47:15,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:15,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244475713] [2021-06-12 20:47:15,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:15,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:15,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:15,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:15,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244475713] [2021-06-12 20:47:15,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244475713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:15,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045000100] [2021-06-12 20:47:15,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:15,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:47:15,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:15,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:47:15,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:15,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:47:15,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:15,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:15,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:15,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:47:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:15,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045000100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:15,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:15,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:47:15,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063688133] [2021-06-12 20:47:15,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:47:15,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:15,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:47:15,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:47:15,609 INFO L87 Difference]: Start difference. First operand 3419 states and 13226 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:16,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:16,415 INFO L93 Difference]: Finished difference Result 3799 states and 14404 transitions. [2021-06-12 20:47:16,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:47:16,415 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:47:16,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:16,421 INFO L225 Difference]: With dead ends: 3799 [2021-06-12 20:47:16,421 INFO L226 Difference]: Without dead ends: 3788 [2021-06-12 20:47:16,421 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 690.7ms TimeCoverageRelationStatistics Valid=193, Invalid=1213, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:47:16,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3788 states. [2021-06-12 20:47:16,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3788 to 3413. [2021-06-12 20:47:16,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3413 states, 3412 states have (on average 3.8710433763188745) internal successors, (13208), 3412 states have internal predecessors, (13208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:16,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 13208 transitions. [2021-06-12 20:47:16,467 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 13208 transitions. Word has length 24 [2021-06-12 20:47:16,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:16,467 INFO L482 AbstractCegarLoop]: Abstraction has 3413 states and 13208 transitions. [2021-06-12 20:47:16,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:16,468 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 13208 transitions. [2021-06-12 20:47:16,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:47:16,472 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:16,472 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:16,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable675 [2021-06-12 20:47:16,672 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:47:16,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:16,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1891928856, now seen corresponding path program 215 times [2021-06-12 20:47:16,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:16,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533605435] [2021-06-12 20:47:16,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:16,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:16,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:16,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:16,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533605435] [2021-06-12 20:47:16,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533605435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:16,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998415251] [2021-06-12 20:47:16,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:16,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:47:16,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:16,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:47:16,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:17,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:47:17,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:17,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:17,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:17,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:47:17,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:17,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998415251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:17,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:17,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:47:17,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091260936] [2021-06-12 20:47:17,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:47:17,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:17,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:47:17,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:47:17,044 INFO L87 Difference]: Start difference. First operand 3413 states and 13208 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:18,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:18,168 INFO L93 Difference]: Finished difference Result 3852 states and 14553 transitions. [2021-06-12 20:47:18,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:47:18,168 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:47:18,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:18,173 INFO L225 Difference]: With dead ends: 3852 [2021-06-12 20:47:18,174 INFO L226 Difference]: Without dead ends: 3843 [2021-06-12 20:47:18,174 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 897.5ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:47:18,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3843 states. [2021-06-12 20:47:18,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3843 to 3410. [2021-06-12 20:47:18,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3410 states, 3409 states have (on average 3.8712232326195366) internal successors, (13197), 3409 states have internal predecessors, (13197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:18,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3410 states to 3410 states and 13197 transitions. [2021-06-12 20:47:18,218 INFO L78 Accepts]: Start accepts. Automaton has 3410 states and 13197 transitions. Word has length 24 [2021-06-12 20:47:18,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:18,218 INFO L482 AbstractCegarLoop]: Abstraction has 3410 states and 13197 transitions. [2021-06-12 20:47:18,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:18,218 INFO L276 IsEmpty]: Start isEmpty. Operand 3410 states and 13197 transitions. [2021-06-12 20:47:18,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:47:18,223 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:18,223 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:18,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable676 [2021-06-12 20:47:18,425 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:47:18,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:18,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1425885276, now seen corresponding path program 216 times [2021-06-12 20:47:18,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:18,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300146989] [2021-06-12 20:47:18,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:18,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:18,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:18,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:18,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300146989] [2021-06-12 20:47:18,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300146989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:18,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151180715] [2021-06-12 20:47:18,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:18,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:47:18,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:18,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:47:18,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:18,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:18,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:18,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:18,884 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:18,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-06-12 20:47:18,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:47:18,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:18,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:18,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-12 20:47:18,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:18,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151180715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:18,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:18,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:47:18,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145992039] [2021-06-12 20:47:18,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:47:18,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:18,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:47:18,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:47:18,959 INFO L87 Difference]: Start difference. First operand 3410 states and 13197 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:20,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:20,068 INFO L93 Difference]: Finished difference Result 3929 states and 14813 transitions. [2021-06-12 20:47:20,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:47:20,068 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:47:20,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:20,074 INFO L225 Difference]: With dead ends: 3929 [2021-06-12 20:47:20,074 INFO L226 Difference]: Without dead ends: 3911 [2021-06-12 20:47:20,075 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 877.0ms TimeCoverageRelationStatistics Valid=256, Invalid=1466, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:47:20,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3911 states. [2021-06-12 20:47:20,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3911 to 3411. [2021-06-12 20:47:20,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3411 states, 3410 states have (on average 3.8712609970674485) internal successors, (13201), 3410 states have internal predecessors, (13201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:20,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3411 states to 3411 states and 13201 transitions. [2021-06-12 20:47:20,131 INFO L78 Accepts]: Start accepts. Automaton has 3411 states and 13201 transitions. Word has length 24 [2021-06-12 20:47:20,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:20,131 INFO L482 AbstractCegarLoop]: Abstraction has 3411 states and 13201 transitions. [2021-06-12 20:47:20,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:20,132 INFO L276 IsEmpty]: Start isEmpty. Operand 3411 states and 13201 transitions. [2021-06-12 20:47:20,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:47:20,136 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:20,136 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:20,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable677,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:20,337 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:47:20,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:20,337 INFO L82 PathProgramCache]: Analyzing trace with hash -82196782, now seen corresponding path program 217 times [2021-06-12 20:47:20,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:20,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310172699] [2021-06-12 20:47:20,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:20,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:20,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:20,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310172699] [2021-06-12 20:47:20,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310172699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:20,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158761521] [2021-06-12 20:47:20,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:20,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:20,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:47:20,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:20,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:47:20,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:20,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:20,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:20,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:47:20,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:20,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158761521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:20,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:20,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:47:20,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567471279] [2021-06-12 20:47:20,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:47:20,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:20,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:47:20,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:47:20,756 INFO L87 Difference]: Start difference. First operand 3411 states and 13201 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:22,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:22,102 INFO L93 Difference]: Finished difference Result 3959 states and 14910 transitions. [2021-06-12 20:47:22,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:47:22,102 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:47:22,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:22,108 INFO L225 Difference]: With dead ends: 3959 [2021-06-12 20:47:22,108 INFO L226 Difference]: Without dead ends: 3940 [2021-06-12 20:47:22,108 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 1054.2ms TimeCoverageRelationStatistics Valid=304, Invalid=1676, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:47:22,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3940 states. [2021-06-12 20:47:22,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3940 to 3414. [2021-06-12 20:47:22,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3414 states, 3413 states have (on average 3.8702021681804863) internal successors, (13209), 3413 states have internal predecessors, (13209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:22,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3414 states to 3414 states and 13209 transitions. [2021-06-12 20:47:22,151 INFO L78 Accepts]: Start accepts. Automaton has 3414 states and 13209 transitions. Word has length 24 [2021-06-12 20:47:22,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:22,151 INFO L482 AbstractCegarLoop]: Abstraction has 3414 states and 13209 transitions. [2021-06-12 20:47:22,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:22,151 INFO L276 IsEmpty]: Start isEmpty. Operand 3414 states and 13209 transitions. [2021-06-12 20:47:22,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:47:22,156 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:22,156 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:22,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable681,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:22,356 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:47:22,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:22,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1854046730, now seen corresponding path program 218 times [2021-06-12 20:47:22,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:22,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838785073] [2021-06-12 20:47:22,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:22,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:22,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:22,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:22,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838785073] [2021-06-12 20:47:22,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838785073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:22,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332237123] [2021-06-12 20:47:22,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:22,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:47:22,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:22,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:47:22,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:22,711 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:22,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-12 20:47:22,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:22,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:22,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:22,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-12 20:47:22,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:22,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332237123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:22,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:22,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:47:22,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919356480] [2021-06-12 20:47:22,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:47:22,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:22,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:47:22,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:47:22,781 INFO L87 Difference]: Start difference. First operand 3414 states and 13209 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:24,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:24,403 INFO L93 Difference]: Finished difference Result 3982 states and 14970 transitions. [2021-06-12 20:47:24,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:47:24,403 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:47:24,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:24,409 INFO L225 Difference]: With dead ends: 3982 [2021-06-12 20:47:24,410 INFO L226 Difference]: Without dead ends: 3963 [2021-06-12 20:47:24,410 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 1349.0ms TimeCoverageRelationStatistics Valid=440, Invalid=2110, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:47:24,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3963 states. [2021-06-12 20:47:24,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3963 to 3412. [2021-06-12 20:47:24,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3412 states, 3411 states have (on average 3.871298739372618) internal successors, (13205), 3411 states have internal predecessors, (13205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:24,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3412 states to 3412 states and 13205 transitions. [2021-06-12 20:47:24,457 INFO L78 Accepts]: Start accepts. Automaton has 3412 states and 13205 transitions. Word has length 24 [2021-06-12 20:47:24,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:24,458 INFO L482 AbstractCegarLoop]: Abstraction has 3412 states and 13205 transitions. [2021-06-12 20:47:24,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:24,458 INFO L276 IsEmpty]: Start isEmpty. Operand 3412 states and 13205 transitions. [2021-06-12 20:47:24,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:47:24,462 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:24,462 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:24,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable682,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:24,663 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:47:24,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:24,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1677505298, now seen corresponding path program 219 times [2021-06-12 20:47:24,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:24,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461787286] [2021-06-12 20:47:24,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:24,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:24,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:24,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461787286] [2021-06-12 20:47:24,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461787286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:24,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471028342] [2021-06-12 20:47:24,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:24,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:47:24,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:24,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:47:24,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:25,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:25,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:25,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:47:25,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:25,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:25,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:25,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:7 [2021-06-12 20:47:25,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:25,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471028342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:25,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:25,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:47:25,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231003123] [2021-06-12 20:47:25,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:47:25,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:25,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:47:25,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:47:25,071 INFO L87 Difference]: Start difference. First operand 3412 states and 13205 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:25,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:25,969 INFO L93 Difference]: Finished difference Result 3864 states and 14615 transitions. [2021-06-12 20:47:25,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:47:25,970 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:47:25,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:25,975 INFO L225 Difference]: With dead ends: 3864 [2021-06-12 20:47:25,975 INFO L226 Difference]: Without dead ends: 3855 [2021-06-12 20:47:25,980 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 819.9ms TimeCoverageRelationStatistics Valid=293, Invalid=1347, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:47:25,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3855 states. [2021-06-12 20:47:26,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3855 to 3415. [2021-06-12 20:47:26,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3415 states, 3414 states have (on average 3.8708260105448153) internal successors, (13215), 3414 states have internal predecessors, (13215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:26,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3415 states to 3415 states and 13215 transitions. [2021-06-12 20:47:26,038 INFO L78 Accepts]: Start accepts. Automaton has 3415 states and 13215 transitions. Word has length 24 [2021-06-12 20:47:26,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:26,038 INFO L482 AbstractCegarLoop]: Abstraction has 3415 states and 13215 transitions. [2021-06-12 20:47:26,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:26,039 INFO L276 IsEmpty]: Start isEmpty. Operand 3415 states and 13215 transitions. [2021-06-12 20:47:26,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:47:26,043 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:26,043 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:26,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable685 [2021-06-12 20:47:26,244 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:47:26,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:26,244 INFO L82 PathProgramCache]: Analyzing trace with hash 843766858, now seen corresponding path program 220 times [2021-06-12 20:47:26,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:26,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485892929] [2021-06-12 20:47:26,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:26,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:26,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:26,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:26,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485892929] [2021-06-12 20:47:26,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485892929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:26,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840716965] [2021-06-12 20:47:26,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:26,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:47:26,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:26,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:47:26,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:26,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:47:26,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:26,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:26,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:26,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:47:26,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:26,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840716965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:26,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:26,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:47:26,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062957136] [2021-06-12 20:47:26,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:47:26,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:26,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:47:26,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:47:26,600 INFO L87 Difference]: Start difference. First operand 3415 states and 13215 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:27,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:27,541 INFO L93 Difference]: Finished difference Result 3851 states and 14577 transitions. [2021-06-12 20:47:27,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:47:27,541 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:47:27,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:27,547 INFO L225 Difference]: With dead ends: 3851 [2021-06-12 20:47:27,547 INFO L226 Difference]: Without dead ends: 3841 [2021-06-12 20:47:27,547 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 714.0ms TimeCoverageRelationStatistics Valid=240, Invalid=1166, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:47:27,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3841 states. [2021-06-12 20:47:27,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3841 to 3411. [2021-06-12 20:47:27,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3411 states, 3410 states have (on average 3.8712609970674485) internal successors, (13201), 3410 states have internal predecessors, (13201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:27,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3411 states to 3411 states and 13201 transitions. [2021-06-12 20:47:27,592 INFO L78 Accepts]: Start accepts. Automaton has 3411 states and 13201 transitions. Word has length 24 [2021-06-12 20:47:27,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:27,592 INFO L482 AbstractCegarLoop]: Abstraction has 3411 states and 13201 transitions. [2021-06-12 20:47:27,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:27,592 INFO L276 IsEmpty]: Start isEmpty. Operand 3411 states and 13201 transitions. [2021-06-12 20:47:27,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:47:27,597 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:27,597 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:27,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable686 [2021-06-12 20:47:27,797 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:47:27,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:27,797 INFO L82 PathProgramCache]: Analyzing trace with hash 564954386, now seen corresponding path program 221 times [2021-06-12 20:47:27,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:27,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731183837] [2021-06-12 20:47:27,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:27,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:27,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:27,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731183837] [2021-06-12 20:47:27,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731183837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:27,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464637372] [2021-06-12 20:47:27,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:28,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:47:28,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:28,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:47:28,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:28,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:47:28,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:28,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:28,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:28,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:47:28,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:28,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464637372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:28,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:28,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:47:28,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034318628] [2021-06-12 20:47:28,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:47:28,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:28,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:47:28,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:47:28,176 INFO L87 Difference]: Start difference. First operand 3411 states and 13201 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:29,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:29,291 INFO L93 Difference]: Finished difference Result 3840 states and 14522 transitions. [2021-06-12 20:47:29,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:47:29,291 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:47:29,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:29,297 INFO L225 Difference]: With dead ends: 3840 [2021-06-12 20:47:29,297 INFO L226 Difference]: Without dead ends: 3831 [2021-06-12 20:47:29,297 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 854.7ms TimeCoverageRelationStatistics Valid=269, Invalid=1537, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:47:29,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3831 states. [2021-06-12 20:47:29,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3831 to 3412. [2021-06-12 20:47:29,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3412 states, 3411 states have (on average 3.871298739372618) internal successors, (13205), 3411 states have internal predecessors, (13205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:29,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3412 states to 3412 states and 13205 transitions. [2021-06-12 20:47:29,342 INFO L78 Accepts]: Start accepts. Automaton has 3412 states and 13205 transitions. Word has length 24 [2021-06-12 20:47:29,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:29,342 INFO L482 AbstractCegarLoop]: Abstraction has 3412 states and 13205 transitions. [2021-06-12 20:47:29,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:29,342 INFO L276 IsEmpty]: Start isEmpty. Operand 3412 states and 13205 transitions. [2021-06-12 20:47:29,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:47:29,346 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:29,346 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:29,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable687 [2021-06-12 20:47:29,547 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:47:29,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:29,547 INFO L82 PathProgramCache]: Analyzing trace with hash -2001341164, now seen corresponding path program 222 times [2021-06-12 20:47:29,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:29,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067923051] [2021-06-12 20:47:29,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:29,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:29,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:29,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:29,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067923051] [2021-06-12 20:47:29,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067923051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:29,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359731320] [2021-06-12 20:47:29,726 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:29,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:47:29,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:29,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:47:29,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:29,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:29,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:29,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:29,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:29,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-06-12 20:47:29,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:47:29,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:29,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:29,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-12 20:47:30,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:30,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359731320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:30,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:30,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:47:30,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033973941] [2021-06-12 20:47:30,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:47:30,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:30,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:47:30,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:47:30,024 INFO L87 Difference]: Start difference. First operand 3412 states and 13205 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:31,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:31,151 INFO L93 Difference]: Finished difference Result 3889 states and 14648 transitions. [2021-06-12 20:47:31,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:47:31,151 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:47:31,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:31,157 INFO L225 Difference]: With dead ends: 3889 [2021-06-12 20:47:31,157 INFO L226 Difference]: Without dead ends: 3870 [2021-06-12 20:47:31,157 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 850.6ms TimeCoverageRelationStatistics Valid=244, Invalid=1396, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:47:31,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3870 states. [2021-06-12 20:47:31,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3870 to 3413. [2021-06-12 20:47:31,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3413 states, 3412 states have (on average 3.8713364595545134) internal successors, (13209), 3412 states have internal predecessors, (13209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:31,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 13209 transitions. [2021-06-12 20:47:31,201 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 13209 transitions. Word has length 24 [2021-06-12 20:47:31,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:31,201 INFO L482 AbstractCegarLoop]: Abstraction has 3413 states and 13209 transitions. [2021-06-12 20:47:31,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:31,201 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 13209 transitions. [2021-06-12 20:47:31,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:47:31,205 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:31,205 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:31,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable688,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:31,406 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:47:31,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:31,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1265476272, now seen corresponding path program 223 times [2021-06-12 20:47:31,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:31,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568880751] [2021-06-12 20:47:31,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:31,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:31,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:31,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:31,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568880751] [2021-06-12 20:47:31,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568880751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:31,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987680253] [2021-06-12 20:47:31,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:31,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:31,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:47:31,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:31,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:47:31,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:31,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:31,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:31,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:47:31,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:31,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987680253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:31,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:31,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:47:31,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958779396] [2021-06-12 20:47:31,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:47:31,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:31,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:47:31,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:47:31,749 INFO L87 Difference]: Start difference. First operand 3413 states and 13209 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:32,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:32,718 INFO L93 Difference]: Finished difference Result 3870 states and 14613 transitions. [2021-06-12 20:47:32,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:47:32,719 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:47:32,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:32,724 INFO L225 Difference]: With dead ends: 3870 [2021-06-12 20:47:32,724 INFO L226 Difference]: Without dead ends: 3861 [2021-06-12 20:47:32,725 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 747.0ms TimeCoverageRelationStatistics Valid=277, Invalid=1445, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:47:32,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3861 states. [2021-06-12 20:47:32,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3861 to 3416. [2021-06-12 20:47:32,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3416 states, 3415 states have (on average 3.8708638360175693) internal successors, (13219), 3415 states have internal predecessors, (13219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:32,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3416 states to 3416 states and 13219 transitions. [2021-06-12 20:47:32,769 INFO L78 Accepts]: Start accepts. Automaton has 3416 states and 13219 transitions. Word has length 24 [2021-06-12 20:47:32,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:32,769 INFO L482 AbstractCegarLoop]: Abstraction has 3416 states and 13219 transitions. [2021-06-12 20:47:32,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:32,769 INFO L276 IsEmpty]: Start isEmpty. Operand 3416 states and 13219 transitions. [2021-06-12 20:47:32,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:47:32,773 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:32,773 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:32,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable692,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:32,974 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:47:32,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:32,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1589062450, now seen corresponding path program 224 times [2021-06-12 20:47:32,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:32,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831911798] [2021-06-12 20:47:32,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:33,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:33,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:33,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831911798] [2021-06-12 20:47:33,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831911798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:33,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335744875] [2021-06-12 20:47:33,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:33,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:47:33,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:33,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:47:33,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:33,319 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:33,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:47:33,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:33,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:33,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:33,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:47:33,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:33,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335744875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:33,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:33,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:47:33,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464172202] [2021-06-12 20:47:33,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:47:33,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:33,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:47:33,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:47:33,413 INFO L87 Difference]: Start difference. First operand 3416 states and 13219 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:34,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:34,510 INFO L93 Difference]: Finished difference Result 3861 states and 14586 transitions. [2021-06-12 20:47:34,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:47:34,510 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:47:34,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:34,516 INFO L225 Difference]: With dead ends: 3861 [2021-06-12 20:47:34,516 INFO L226 Difference]: Without dead ends: 3848 [2021-06-12 20:47:34,517 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 883.8ms TimeCoverageRelationStatistics Valid=261, Invalid=1461, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:47:34,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3848 states. [2021-06-12 20:47:34,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3848 to 3411. [2021-06-12 20:47:34,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3411 states, 3410 states have (on average 3.8712609970674485) internal successors, (13201), 3410 states have internal predecessors, (13201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:34,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3411 states to 3411 states and 13201 transitions. [2021-06-12 20:47:34,575 INFO L78 Accepts]: Start accepts. Automaton has 3411 states and 13201 transitions. Word has length 24 [2021-06-12 20:47:34,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:34,575 INFO L482 AbstractCegarLoop]: Abstraction has 3411 states and 13201 transitions. [2021-06-12 20:47:34,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:34,575 INFO L276 IsEmpty]: Start isEmpty. Operand 3411 states and 13201 transitions. [2021-06-12 20:47:34,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:47:34,579 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:34,579 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:34,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable693 [2021-06-12 20:47:34,780 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:47:34,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:34,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1707034270, now seen corresponding path program 225 times [2021-06-12 20:47:34,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:34,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534560841] [2021-06-12 20:47:34,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:34,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:34,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:34,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:34,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534560841] [2021-06-12 20:47:34,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534560841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:34,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104129833] [2021-06-12 20:47:34,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:34,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:47:34,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:34,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 20:47:34,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:35,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:35,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:35,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 44 [2021-06-12 20:47:35,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:35,205 INFO L628 ElimStorePlain]: treesize reduction 14, result has 70.2 percent of original size [2021-06-12 20:47:35,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:35,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:43 [2021-06-12 20:47:35,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:35,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104129833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:35,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:35,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:47:35,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078454513] [2021-06-12 20:47:35,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:47:35,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:35,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:47:35,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:47:35,267 INFO L87 Difference]: Start difference. First operand 3411 states and 13201 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:36,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:36,385 INFO L93 Difference]: Finished difference Result 3920 states and 14728 transitions. [2021-06-12 20:47:36,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:47:36,385 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:47:36,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:36,391 INFO L225 Difference]: With dead ends: 3920 [2021-06-12 20:47:36,391 INFO L226 Difference]: Without dead ends: 3892 [2021-06-12 20:47:36,391 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 855.8ms TimeCoverageRelationStatistics Valid=264, Invalid=1542, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:47:36,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3892 states. [2021-06-12 20:47:36,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3892 to 3413. [2021-06-12 20:47:36,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3413 states, 3412 states have (on average 3.8707502930832356) internal successors, (13207), 3412 states have internal predecessors, (13207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:36,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 13207 transitions. [2021-06-12 20:47:36,436 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 13207 transitions. Word has length 24 [2021-06-12 20:47:36,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:36,437 INFO L482 AbstractCegarLoop]: Abstraction has 3413 states and 13207 transitions. [2021-06-12 20:47:36,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:36,437 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 13207 transitions. [2021-06-12 20:47:36,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:47:36,441 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:36,441 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:36,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable695 [2021-06-12 20:47:36,641 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:47:36,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:36,642 INFO L82 PathProgramCache]: Analyzing trace with hash -442736788, now seen corresponding path program 226 times [2021-06-12 20:47:36,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:36,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845546817] [2021-06-12 20:47:36,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:36,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:36,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:36,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:36,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845546817] [2021-06-12 20:47:36,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845546817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:36,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619953509] [2021-06-12 20:47:36,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:36,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:47:36,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:36,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:47:36,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:36,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:47:36,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:36,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:36,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:36,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-12 20:47:37,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:37,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619953509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:37,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:37,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:47:37,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651614462] [2021-06-12 20:47:37,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:47:37,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:37,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:47:37,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:47:37,018 INFO L87 Difference]: Start difference. First operand 3413 states and 13207 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:38,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:38,095 INFO L93 Difference]: Finished difference Result 3873 states and 14628 transitions. [2021-06-12 20:47:38,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:47:38,095 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:47:38,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:38,102 INFO L225 Difference]: With dead ends: 3873 [2021-06-12 20:47:38,102 INFO L226 Difference]: Without dead ends: 3854 [2021-06-12 20:47:38,102 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 904.6ms TimeCoverageRelationStatistics Valid=287, Invalid=1519, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:47:38,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3854 states. [2021-06-12 20:47:38,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3854 to 3412. [2021-06-12 20:47:38,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3412 states, 3411 states have (on average 3.871298739372618) internal successors, (13205), 3411 states have internal predecessors, (13205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:38,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3412 states to 3412 states and 13205 transitions. [2021-06-12 20:47:38,147 INFO L78 Accepts]: Start accepts. Automaton has 3412 states and 13205 transitions. Word has length 24 [2021-06-12 20:47:38,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:38,147 INFO L482 AbstractCegarLoop]: Abstraction has 3412 states and 13205 transitions. [2021-06-12 20:47:38,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:38,147 INFO L276 IsEmpty]: Start isEmpty. Operand 3412 states and 13205 transitions. [2021-06-12 20:47:38,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:47:38,151 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:38,151 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:38,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable700,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:38,352 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:47:38,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:38,352 INFO L82 PathProgramCache]: Analyzing trace with hash -619278220, now seen corresponding path program 227 times [2021-06-12 20:47:38,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:38,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274645256] [2021-06-12 20:47:38,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:38,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:38,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:38,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:38,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274645256] [2021-06-12 20:47:38,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274645256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:38,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486816061] [2021-06-12 20:47:38,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:38,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:47:38,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:38,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:47:38,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:38,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:47:38,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:38,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:38,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:38,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:47:38,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:38,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486816061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:38,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:38,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:47:38,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562604166] [2021-06-12 20:47:38,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:47:38,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:38,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:47:38,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:47:38,695 INFO L87 Difference]: Start difference. First operand 3412 states and 13205 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:39,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:39,501 INFO L93 Difference]: Finished difference Result 3806 states and 14423 transitions. [2021-06-12 20:47:39,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:47:39,502 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:47:39,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:39,508 INFO L225 Difference]: With dead ends: 3806 [2021-06-12 20:47:39,508 INFO L226 Difference]: Without dead ends: 3797 [2021-06-12 20:47:39,509 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 697.8ms TimeCoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:47:39,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3797 states. [2021-06-12 20:47:39,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3797 to 3414. [2021-06-12 20:47:39,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3414 states, 3413 states have (on average 3.8713741576325815) internal successors, (13213), 3413 states have internal predecessors, (13213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:39,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3414 states to 3414 states and 13213 transitions. [2021-06-12 20:47:39,553 INFO L78 Accepts]: Start accepts. Automaton has 3414 states and 13213 transitions. Word has length 24 [2021-06-12 20:47:39,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:39,553 INFO L482 AbstractCegarLoop]: Abstraction has 3414 states and 13213 transitions. [2021-06-12 20:47:39,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:39,553 INFO L276 IsEmpty]: Start isEmpty. Operand 3414 states and 13213 transitions. [2021-06-12 20:47:39,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:47:39,557 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:39,558 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:39,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable701 [2021-06-12 20:47:39,758 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:47:39,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:39,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1453016660, now seen corresponding path program 228 times [2021-06-12 20:47:39,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:39,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369950454] [2021-06-12 20:47:39,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:39,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:39,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:39,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:39,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369950454] [2021-06-12 20:47:39,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369950454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:39,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492129651] [2021-06-12 20:47:39,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:39,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:47:39,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:39,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:47:39,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:40,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:40,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:40,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:47:40,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:40,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:40,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:40,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:7 [2021-06-12 20:47:40,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:40,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492129651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:40,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:40,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:47:40,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314158381] [2021-06-12 20:47:40,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:47:40,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:40,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:47:40,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:47:40,150 INFO L87 Difference]: Start difference. First operand 3414 states and 13213 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:40,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:40,993 INFO L93 Difference]: Finished difference Result 3783 states and 14356 transitions. [2021-06-12 20:47:40,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:47:40,993 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:47:40,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:40,999 INFO L225 Difference]: With dead ends: 3783 [2021-06-12 20:47:40,999 INFO L226 Difference]: Without dead ends: 3773 [2021-06-12 20:47:40,999 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 748.7ms TimeCoverageRelationStatistics Valid=248, Invalid=1158, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:47:41,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3773 states. [2021-06-12 20:47:41,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3773 to 3411. [2021-06-12 20:47:41,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3411 states, 3410 states have (on average 3.8712609970674485) internal successors, (13201), 3410 states have internal predecessors, (13201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:41,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3411 states to 3411 states and 13201 transitions. [2021-06-12 20:47:41,043 INFO L78 Accepts]: Start accepts. Automaton has 3411 states and 13201 transitions. Word has length 24 [2021-06-12 20:47:41,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:41,043 INFO L482 AbstractCegarLoop]: Abstraction has 3411 states and 13201 transitions. [2021-06-12 20:47:41,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:41,043 INFO L276 IsEmpty]: Start isEmpty. Operand 3411 states and 13201 transitions. [2021-06-12 20:47:41,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:47:41,048 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:41,048 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:41,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable702,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:41,248 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:47:41,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:41,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1240546540, now seen corresponding path program 229 times [2021-06-12 20:47:41,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:41,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832265574] [2021-06-12 20:47:41,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:41,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:41,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:41,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832265574] [2021-06-12 20:47:41,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832265574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:41,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109293967] [2021-06-12 20:47:41,444 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:41,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:41,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:47:41,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:41,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:47:41,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:41,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:41,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:41,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:47:41,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:41,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109293967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:41,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:41,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:47:41,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081000825] [2021-06-12 20:47:41,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:47:41,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:41,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:47:41,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:47:41,629 INFO L87 Difference]: Start difference. First operand 3411 states and 13201 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:42,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:42,669 INFO L93 Difference]: Finished difference Result 3883 states and 14653 transitions. [2021-06-12 20:47:42,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:47:42,669 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:47:42,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:42,675 INFO L225 Difference]: With dead ends: 3883 [2021-06-12 20:47:42,675 INFO L226 Difference]: Without dead ends: 3864 [2021-06-12 20:47:42,675 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 795.1ms TimeCoverageRelationStatistics Valid=246, Invalid=1394, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:47:42,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3864 states. [2021-06-12 20:47:42,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3864 to 3411. [2021-06-12 20:47:42,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3411 states, 3410 states have (on average 3.8712609970674485) internal successors, (13201), 3410 states have internal predecessors, (13201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:42,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3411 states to 3411 states and 13201 transitions. [2021-06-12 20:47:42,720 INFO L78 Accepts]: Start accepts. Automaton has 3411 states and 13201 transitions. Word has length 24 [2021-06-12 20:47:42,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:42,720 INFO L482 AbstractCegarLoop]: Abstraction has 3411 states and 13201 transitions. [2021-06-12 20:47:42,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:42,720 INFO L276 IsEmpty]: Start isEmpty. Operand 3411 states and 13201 transitions. [2021-06-12 20:47:42,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:47:42,724 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:42,724 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:42,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable703,355 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:42,925 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:47:42,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:42,925 INFO L82 PathProgramCache]: Analyzing trace with hash 212396680, now seen corresponding path program 230 times [2021-06-12 20:47:42,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:42,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093815389] [2021-06-12 20:47:42,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:42,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:43,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:43,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093815389] [2021-06-12 20:47:43,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093815389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:43,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670765617] [2021-06-12 20:47:43,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:43,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:47:43,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:43,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:47:43,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:43,239 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:43,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:47:43,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:43,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:43,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:43,250 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:47:43,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:43,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670765617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:43,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:43,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:47:43,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993255751] [2021-06-12 20:47:43,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:47:43,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:43,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:47:43,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:47:43,342 INFO L87 Difference]: Start difference. First operand 3411 states and 13201 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:44,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:44,215 INFO L93 Difference]: Finished difference Result 3872 states and 14637 transitions. [2021-06-12 20:47:44,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:47:44,215 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:47:44,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:44,221 INFO L225 Difference]: With dead ends: 3872 [2021-06-12 20:47:44,221 INFO L226 Difference]: Without dead ends: 3862 [2021-06-12 20:47:44,221 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 810.8ms TimeCoverageRelationStatistics Valid=279, Invalid=1527, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:47:44,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2021-06-12 20:47:44,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 3414. [2021-06-12 20:47:44,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3414 states, 3413 states have (on average 3.8710811602695574) internal successors, (13212), 3413 states have internal predecessors, (13212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:44,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3414 states to 3414 states and 13212 transitions. [2021-06-12 20:47:44,266 INFO L78 Accepts]: Start accepts. Automaton has 3414 states and 13212 transitions. Word has length 24 [2021-06-12 20:47:44,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:44,266 INFO L482 AbstractCegarLoop]: Abstraction has 3414 states and 13212 transitions. [2021-06-12 20:47:44,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:44,266 INFO L276 IsEmpty]: Start isEmpty. Operand 3414 states and 13212 transitions. [2021-06-12 20:47:44,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:47:44,270 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:44,270 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:44,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable704,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:44,471 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:47:44,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:44,471 INFO L82 PathProgramCache]: Analyzing trace with hash 535982858, now seen corresponding path program 231 times [2021-06-12 20:47:44,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:44,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095138371] [2021-06-12 20:47:44,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:44,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:44,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:44,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:44,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095138371] [2021-06-12 20:47:44,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095138371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:44,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437969481] [2021-06-12 20:47:44,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:44,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:47:44,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:44,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 20:47:44,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:44,818 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:44,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-12 20:47:44,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:44,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:44,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:44,833 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:37 [2021-06-12 20:47:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:45,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437969481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:45,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:45,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:47:45,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670951477] [2021-06-12 20:47:45,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:47:45,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:45,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:47:45,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:47:45,024 INFO L87 Difference]: Start difference. First operand 3414 states and 13212 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:46,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:46,872 INFO L93 Difference]: Finished difference Result 4016 states and 14984 transitions. [2021-06-12 20:47:46,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:47:46,872 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:47:46,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:46,878 INFO L225 Difference]: With dead ends: 4016 [2021-06-12 20:47:46,878 INFO L226 Difference]: Without dead ends: 3997 [2021-06-12 20:47:46,878 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 1665.7ms TimeCoverageRelationStatistics Valid=413, Invalid=2343, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 20:47:46,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3997 states. [2021-06-12 20:47:46,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3997 to 3426. [2021-06-12 20:47:46,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3426 states, 3425 states have (on average 3.8703649635036497) internal successors, (13256), 3425 states have internal predecessors, (13256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:46,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3426 states to 3426 states and 13256 transitions. [2021-06-12 20:47:46,925 INFO L78 Accepts]: Start accepts. Automaton has 3426 states and 13256 transitions. Word has length 24 [2021-06-12 20:47:46,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:46,925 INFO L482 AbstractCegarLoop]: Abstraction has 3426 states and 13256 transitions. [2021-06-12 20:47:46,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:46,925 INFO L276 IsEmpty]: Start isEmpty. Operand 3426 states and 13256 transitions. [2021-06-12 20:47:46,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:47:46,929 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:46,929 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:47,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable706,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:47,130 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:47:47,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:47,130 INFO L82 PathProgramCache]: Analyzing trace with hash -2073240316, now seen corresponding path program 232 times [2021-06-12 20:47:47,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:47,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919536712] [2021-06-12 20:47:47,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:47,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:47,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:47,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:47,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919536712] [2021-06-12 20:47:47,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919536712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:47,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616540401] [2021-06-12 20:47:47,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:47,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:47:47,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:47,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:47:47,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:47,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:47:47,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:47,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:47,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:47,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:47:47,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:47,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616540401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:47,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:47,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:47:47,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73839370] [2021-06-12 20:47:47,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:47:47,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:47,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:47:47,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:47:47,463 INFO L87 Difference]: Start difference. First operand 3426 states and 13256 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:48,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:48,318 INFO L93 Difference]: Finished difference Result 3782 states and 14374 transitions. [2021-06-12 20:47:48,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:47:48,319 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:47:48,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:48,325 INFO L225 Difference]: With dead ends: 3782 [2021-06-12 20:47:48,325 INFO L226 Difference]: Without dead ends: 3767 [2021-06-12 20:47:48,326 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 698.0ms TimeCoverageRelationStatistics Valid=221, Invalid=1185, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:47:48,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3767 states. [2021-06-12 20:47:48,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3767 to 3420. [2021-06-12 20:47:48,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3420 states, 3419 states have (on average 3.870722433460076) internal successors, (13234), 3419 states have internal predecessors, (13234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:48,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3420 states to 3420 states and 13234 transitions. [2021-06-12 20:47:48,375 INFO L78 Accepts]: Start accepts. Automaton has 3420 states and 13234 transitions. Word has length 24 [2021-06-12 20:47:48,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:48,375 INFO L482 AbstractCegarLoop]: Abstraction has 3420 states and 13234 transitions. [2021-06-12 20:47:48,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:48,375 INFO L276 IsEmpty]: Start isEmpty. Operand 3420 states and 13234 transitions. [2021-06-12 20:47:48,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:47:48,379 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:48,379 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:48,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable715,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:48,580 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:47:48,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:48,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1859993244, now seen corresponding path program 233 times [2021-06-12 20:47:48,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:48,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547774352] [2021-06-12 20:47:48,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:48,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:48,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:48,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:48,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547774352] [2021-06-12 20:47:48,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547774352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:48,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179601295] [2021-06-12 20:47:48,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:48,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:47:48,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:48,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:47:48,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:48,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:47:48,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:48,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:48,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:48,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-12 20:47:48,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:48,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179601295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:48,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:48,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:47:48,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733103689] [2021-06-12 20:47:48,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:47:48,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:48,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:47:48,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:47:48,940 INFO L87 Difference]: Start difference. First operand 3420 states and 13234 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:49,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:49,879 INFO L93 Difference]: Finished difference Result 3906 states and 14738 transitions. [2021-06-12 20:47:49,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:47:49,879 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:47:49,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:49,886 INFO L225 Difference]: With dead ends: 3906 [2021-06-12 20:47:49,886 INFO L226 Difference]: Without dead ends: 3887 [2021-06-12 20:47:49,886 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 776.3ms TimeCoverageRelationStatistics Valid=263, Invalid=1377, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:47:49,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3887 states. [2021-06-12 20:47:49,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3887 to 3420. [2021-06-12 20:47:49,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3420 states, 3419 states have (on average 3.870722433460076) internal successors, (13234), 3419 states have internal predecessors, (13234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:49,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3420 states to 3420 states and 13234 transitions. [2021-06-12 20:47:49,933 INFO L78 Accepts]: Start accepts. Automaton has 3420 states and 13234 transitions. Word has length 24 [2021-06-12 20:47:49,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:49,934 INFO L482 AbstractCegarLoop]: Abstraction has 3420 states and 13234 transitions. [2021-06-12 20:47:49,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:49,934 INFO L276 IsEmpty]: Start isEmpty. Operand 3420 states and 13234 transitions. [2021-06-12 20:47:49,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:47:49,938 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:49,938 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:50,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable716 [2021-06-12 20:47:50,138 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:47:50,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:50,139 INFO L82 PathProgramCache]: Analyzing trace with hash 2077418130, now seen corresponding path program 234 times [2021-06-12 20:47:50,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:50,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678034564] [2021-06-12 20:47:50,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:50,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:50,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:50,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678034564] [2021-06-12 20:47:50,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678034564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:50,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844873559] [2021-06-12 20:47:50,305 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:50,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:47:50,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:50,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:47:50,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:50,449 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:50,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:47:50,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:50,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:50,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:50,465 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:47:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:50,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844873559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:50,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:50,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:47:50,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408984495] [2021-06-12 20:47:50,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:47:50,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:50,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:47:50,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:47:50,568 INFO L87 Difference]: Start difference. First operand 3420 states and 13234 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:51,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:51,669 INFO L93 Difference]: Finished difference Result 3932 states and 14799 transitions. [2021-06-12 20:47:51,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:47:51,669 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:47:51,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:51,676 INFO L225 Difference]: With dead ends: 3932 [2021-06-12 20:47:51,676 INFO L226 Difference]: Without dead ends: 3913 [2021-06-12 20:47:51,676 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1004.0ms TimeCoverageRelationStatistics Valid=368, Invalid=1612, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:47:51,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3913 states. [2021-06-12 20:47:51,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3913 to 3425. [2021-06-12 20:47:51,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3425 states, 3424 states have (on average 3.8703271028037385) internal successors, (13252), 3424 states have internal predecessors, (13252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:51,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3425 states to 3425 states and 13252 transitions. [2021-06-12 20:47:51,742 INFO L78 Accepts]: Start accepts. Automaton has 3425 states and 13252 transitions. Word has length 24 [2021-06-12 20:47:51,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:51,742 INFO L482 AbstractCegarLoop]: Abstraction has 3425 states and 13252 transitions. [2021-06-12 20:47:51,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:51,742 INFO L276 IsEmpty]: Start isEmpty. Operand 3425 states and 13252 transitions. [2021-06-12 20:47:51,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:47:51,747 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:51,747 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:51,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:51,947 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:47:51,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:51,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1243679690, now seen corresponding path program 235 times [2021-06-12 20:47:51,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:51,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111184050] [2021-06-12 20:47:51,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:51,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:52,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:52,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:52,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111184050] [2021-06-12 20:47:52,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111184050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:52,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103101741] [2021-06-12 20:47:52,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:52,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:47:52,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:52,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:47:52,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:52,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:52,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:52,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:47:52,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:52,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103101741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:52,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:52,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:47:52,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831787637] [2021-06-12 20:47:52,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:47:52,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:52,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:47:52,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:47:52,307 INFO L87 Difference]: Start difference. First operand 3425 states and 13252 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:52,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:52,959 INFO L93 Difference]: Finished difference Result 3894 states and 14709 transitions. [2021-06-12 20:47:52,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:47:52,959 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:47:52,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:52,965 INFO L225 Difference]: With dead ends: 3894 [2021-06-12 20:47:52,965 INFO L226 Difference]: Without dead ends: 3882 [2021-06-12 20:47:52,965 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 616.5ms TimeCoverageRelationStatistics Valid=215, Invalid=975, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:47:52,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3882 states. [2021-06-12 20:47:53,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3882 to 3422. [2021-06-12 20:47:53,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3422 states, 3421 states have (on average 3.8705057000876937) internal successors, (13241), 3421 states have internal predecessors, (13241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:53,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3422 states to 3422 states and 13241 transitions. [2021-06-12 20:47:53,009 INFO L78 Accepts]: Start accepts. Automaton has 3422 states and 13241 transitions. Word has length 24 [2021-06-12 20:47:53,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:53,009 INFO L482 AbstractCegarLoop]: Abstraction has 3422 states and 13241 transitions. [2021-06-12 20:47:53,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:53,009 INFO L276 IsEmpty]: Start isEmpty. Operand 3422 states and 13241 transitions. [2021-06-12 20:47:53,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:47:53,013 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:53,013 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:53,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable720 [2021-06-12 20:47:53,214 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:47:53,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:53,214 INFO L82 PathProgramCache]: Analyzing trace with hash 411054290, now seen corresponding path program 236 times [2021-06-12 20:47:53,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:53,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590081196] [2021-06-12 20:47:53,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:53,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:53,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:53,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:53,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590081196] [2021-06-12 20:47:53,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590081196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:53,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294888708] [2021-06-12 20:47:53,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:53,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:47:53,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:53,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:47:53,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:53,528 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:53,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:47:53,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:53,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:53,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:53,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-12 20:47:53,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:53,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294888708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:53,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:53,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:47:53,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374870048] [2021-06-12 20:47:53,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:47:53,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:53,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:47:53,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:47:53,639 INFO L87 Difference]: Start difference. First operand 3422 states and 13241 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:54,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:54,717 INFO L93 Difference]: Finished difference Result 3835 states and 14527 transitions. [2021-06-12 20:47:54,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:47:54,717 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:47:54,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:54,723 INFO L225 Difference]: With dead ends: 3835 [2021-06-12 20:47:54,724 INFO L226 Difference]: Without dead ends: 3826 [2021-06-12 20:47:54,724 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 851.1ms TimeCoverageRelationStatistics Valid=283, Invalid=1523, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:47:54,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3826 states. [2021-06-12 20:47:54,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3826 to 3424. [2021-06-12 20:47:54,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3424 states, 3423 states have (on average 3.8702892199824714) internal successors, (13248), 3423 states have internal predecessors, (13248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:54,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3424 states to 3424 states and 13248 transitions. [2021-06-12 20:47:54,771 INFO L78 Accepts]: Start accepts. Automaton has 3424 states and 13248 transitions. Word has length 24 [2021-06-12 20:47:54,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:54,771 INFO L482 AbstractCegarLoop]: Abstraction has 3424 states and 13248 transitions. [2021-06-12 20:47:54,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:54,771 INFO L276 IsEmpty]: Start isEmpty. Operand 3424 states and 13248 transitions. [2021-06-12 20:47:54,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:47:54,775 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:54,775 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:54,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable721,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:54,976 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:47:54,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:54,976 INFO L82 PathProgramCache]: Analyzing trace with hash 734640468, now seen corresponding path program 237 times [2021-06-12 20:47:54,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:54,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015021837] [2021-06-12 20:47:54,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:55,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:55,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:55,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015021837] [2021-06-12 20:47:55,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015021837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:55,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499767255] [2021-06-12 20:47:55,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:55,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:47:55,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:55,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:47:55,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:55,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:55,305 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:55,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 49 [2021-06-12 20:47:55,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:55,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:55,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:55,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:49 [2021-06-12 20:47:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:55,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499767255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:55,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:55,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:47:55,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656963423] [2021-06-12 20:47:55,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:47:55,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:55,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:47:55,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:47:55,493 INFO L87 Difference]: Start difference. First operand 3424 states and 13248 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:56,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:56,884 INFO L93 Difference]: Finished difference Result 3901 states and 14689 transitions. [2021-06-12 20:47:56,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 20:47:56,884 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:47:56,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:56,890 INFO L225 Difference]: With dead ends: 3901 [2021-06-12 20:47:56,891 INFO L226 Difference]: Without dead ends: 3890 [2021-06-12 20:47:56,891 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1206.7ms TimeCoverageRelationStatistics Valid=408, Invalid=1944, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 20:47:56,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3890 states. [2021-06-12 20:47:56,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3890 to 3430. [2021-06-12 20:47:56,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3430 states, 3429 states have (on average 3.8710994459025954) internal successors, (13274), 3429 states have internal predecessors, (13274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:56,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 13274 transitions. [2021-06-12 20:47:56,933 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 13274 transitions. Word has length 24 [2021-06-12 20:47:56,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:56,933 INFO L482 AbstractCegarLoop]: Abstraction has 3430 states and 13274 transitions. [2021-06-12 20:47:56,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:56,933 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 13274 transitions. [2021-06-12 20:47:56,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:47:56,937 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:56,937 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:57,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable723 [2021-06-12 20:47:57,138 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:47:57,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:57,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1874582706, now seen corresponding path program 238 times [2021-06-12 20:47:57,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:57,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378854995] [2021-06-12 20:47:57,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:57,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:57,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:57,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378854995] [2021-06-12 20:47:57,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378854995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:57,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046004478] [2021-06-12 20:47:57,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:57,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:47:57,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:57,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:47:57,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:57,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:47:57,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:57,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:57,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:57,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:47:57,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:57,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046004478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:57,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:57,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:47:57,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878727508] [2021-06-12 20:47:57,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:47:57,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:57,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:47:57,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:47:57,510 INFO L87 Difference]: Start difference. First operand 3430 states and 13274 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:58,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:58,123 INFO L93 Difference]: Finished difference Result 3785 states and 14377 transitions. [2021-06-12 20:47:58,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:47:58,124 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:47:58,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:58,129 INFO L225 Difference]: With dead ends: 3785 [2021-06-12 20:47:58,129 INFO L226 Difference]: Without dead ends: 3774 [2021-06-12 20:47:58,129 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 545.5ms TimeCoverageRelationStatistics Valid=202, Invalid=920, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:47:58,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3774 states. [2021-06-12 20:47:58,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3774 to 3429. [2021-06-12 20:47:58,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 3428 states have (on average 3.870770128354726) internal successors, (13269), 3428 states have internal predecessors, (13269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:58,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 13269 transitions. [2021-06-12 20:47:58,174 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 13269 transitions. Word has length 24 [2021-06-12 20:47:58,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:58,174 INFO L482 AbstractCegarLoop]: Abstraction has 3429 states and 13269 transitions. [2021-06-12 20:47:58,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:58,174 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 13269 transitions. [2021-06-12 20:47:58,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:47:58,179 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:58,179 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:58,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable728,364 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:58,379 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:47:58,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:58,379 INFO L82 PathProgramCache]: Analyzing trace with hash 708131106, now seen corresponding path program 239 times [2021-06-12 20:47:58,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:58,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121380921] [2021-06-12 20:47:58,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:58,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:58,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:58,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:58,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121380921] [2021-06-12 20:47:58,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121380921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:58,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552689447] [2021-06-12 20:47:58,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:58,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:47:58,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:58,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:47:58,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:58,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:47:58,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:58,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:58,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:58,689 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:47:58,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:58,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552689447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:58,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:58,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:47:58,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634137897] [2021-06-12 20:47:58,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:47:58,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:58,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:47:58,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:47:58,742 INFO L87 Difference]: Start difference. First operand 3429 states and 13269 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:59,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:59,575 INFO L93 Difference]: Finished difference Result 3822 states and 14496 transitions. [2021-06-12 20:47:59,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:47:59,576 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:47:59,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:59,581 INFO L225 Difference]: With dead ends: 3822 [2021-06-12 20:47:59,581 INFO L226 Difference]: Without dead ends: 3813 [2021-06-12 20:47:59,581 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 702.9ms TimeCoverageRelationStatistics Valid=259, Invalid=1223, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:47:59,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2021-06-12 20:47:59,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 3430. [2021-06-12 20:47:59,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3430 states, 3429 states have (on average 3.8708078156897057) internal successors, (13273), 3429 states have internal predecessors, (13273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:59,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 13273 transitions. [2021-06-12 20:47:59,625 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 13273 transitions. Word has length 24 [2021-06-12 20:47:59,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:59,626 INFO L482 AbstractCegarLoop]: Abstraction has 3430 states and 13273 transitions. [2021-06-12 20:47:59,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:59,626 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 13273 transitions. [2021-06-12 20:47:59,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:47:59,630 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:59,630 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:59,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable729,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:59,830 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:47:59,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:59,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1082730068, now seen corresponding path program 240 times [2021-06-12 20:47:59,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:59,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538182013] [2021-06-12 20:47:59,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:59,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:00,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:00,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:00,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538182013] [2021-06-12 20:48:00,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538182013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:00,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564145792] [2021-06-12 20:48:00,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:00,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:48:00,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:00,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:48:00,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:00,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:00,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:48:00,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:00,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:00,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:00,154 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-12 20:48:00,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:00,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564145792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:00,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:00,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:48:00,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923048829] [2021-06-12 20:48:00,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:48:00,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:00,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:48:00,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:48:00,243 INFO L87 Difference]: Start difference. First operand 3430 states and 13273 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:01,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:01,041 INFO L93 Difference]: Finished difference Result 3812 states and 14469 transitions. [2021-06-12 20:48:01,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:48:01,041 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:48:01,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:01,047 INFO L225 Difference]: With dead ends: 3812 [2021-06-12 20:48:01,047 INFO L226 Difference]: Without dead ends: 3802 [2021-06-12 20:48:01,047 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 716.7ms TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:48:01,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3802 states. [2021-06-12 20:48:01,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3802 to 3429. [2021-06-12 20:48:01,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 3428 states have (on average 3.870770128354726) internal successors, (13269), 3428 states have internal predecessors, (13269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:01,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 13269 transitions. [2021-06-12 20:48:01,093 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 13269 transitions. Word has length 24 [2021-06-12 20:48:01,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:01,093 INFO L482 AbstractCegarLoop]: Abstraction has 3429 states and 13269 transitions. [2021-06-12 20:48:01,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:01,093 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 13269 transitions. [2021-06-12 20:48:01,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:48:01,098 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:01,098 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:01,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable730 [2021-06-12 20:48:01,298 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:48:01,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:01,299 INFO L82 PathProgramCache]: Analyzing trace with hash 644159276, now seen corresponding path program 241 times [2021-06-12 20:48:01,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:01,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397331666] [2021-06-12 20:48:01,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:01,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:01,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:01,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:01,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397331666] [2021-06-12 20:48:01,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397331666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:01,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239520366] [2021-06-12 20:48:01,476 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:01,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:01,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:48:01,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:01,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:48:01,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:01,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:01,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:01,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-12 20:48:01,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:01,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239520366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:01,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:01,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:48:01,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780239273] [2021-06-12 20:48:01,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:48:01,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:01,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:48:01,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:48:01,649 INFO L87 Difference]: Start difference. First operand 3429 states and 13269 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:02,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:02,338 INFO L93 Difference]: Finished difference Result 3817 states and 14487 transitions. [2021-06-12 20:48:02,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:48:02,339 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:48:02,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:02,344 INFO L225 Difference]: With dead ends: 3817 [2021-06-12 20:48:02,344 INFO L226 Difference]: Without dead ends: 3806 [2021-06-12 20:48:02,344 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 595.8ms TimeCoverageRelationStatistics Valid=228, Invalid=1032, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:48:02,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2021-06-12 20:48:02,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 3431. [2021-06-12 20:48:02,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3431 states, 3430 states have (on average 3.870262390670554) internal successors, (13275), 3430 states have internal predecessors, (13275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:02,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3431 states to 3431 states and 13275 transitions. [2021-06-12 20:48:02,386 INFO L78 Accepts]: Start accepts. Automaton has 3431 states and 13275 transitions. Word has length 24 [2021-06-12 20:48:02,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:02,386 INFO L482 AbstractCegarLoop]: Abstraction has 3431 states and 13275 transitions. [2021-06-12 20:48:02,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:02,386 INFO L276 IsEmpty]: Start isEmpty. Operand 3431 states and 13275 transitions. [2021-06-12 20:48:02,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:48:02,390 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:02,390 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:02,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable732,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:02,590 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:48:02,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:02,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1623573724, now seen corresponding path program 242 times [2021-06-12 20:48:02,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:02,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493613834] [2021-06-12 20:48:02,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:02,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:02,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:02,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:02,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493613834] [2021-06-12 20:48:02,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493613834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:02,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696961348] [2021-06-12 20:48:02,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:02,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:48:02,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:02,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:48:02,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:02,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:02,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:48:02,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:02,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:02,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:02,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-12 20:48:03,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:03,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696961348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:03,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:03,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:48:03,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955209933] [2021-06-12 20:48:03,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:48:03,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:03,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:48:03,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:48:03,024 INFO L87 Difference]: Start difference. First operand 3431 states and 13275 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:04,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:04,048 INFO L93 Difference]: Finished difference Result 3830 states and 14517 transitions. [2021-06-12 20:48:04,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:48:04,048 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:48:04,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:04,054 INFO L225 Difference]: With dead ends: 3830 [2021-06-12 20:48:04,054 INFO L226 Difference]: Without dead ends: 3819 [2021-06-12 20:48:04,054 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 861.2ms TimeCoverageRelationStatistics Valid=281, Invalid=1359, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:48:04,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3819 states. [2021-06-12 20:48:04,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3819 to 3430. [2021-06-12 20:48:04,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3430 states, 3429 states have (on average 3.8708078156897057) internal successors, (13273), 3429 states have internal predecessors, (13273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:04,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 13273 transitions. [2021-06-12 20:48:04,100 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 13273 transitions. Word has length 24 [2021-06-12 20:48:04,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:04,100 INFO L482 AbstractCegarLoop]: Abstraction has 3430 states and 13273 transitions. [2021-06-12 20:48:04,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:04,100 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 13273 transitions. [2021-06-12 20:48:04,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:48:04,105 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:04,105 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:04,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable733 [2021-06-12 20:48:04,305 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:48:04,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:04,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1373271240, now seen corresponding path program 243 times [2021-06-12 20:48:04,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:04,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883895786] [2021-06-12 20:48:04,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:04,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:04,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:04,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883895786] [2021-06-12 20:48:04,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883895786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:04,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457965217] [2021-06-12 20:48:04,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:04,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:48:04,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:04,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:48:04,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:04,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:04,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:04,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:48:04,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:04,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:04,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:04,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 20:48:04,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:04,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457965217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:04,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:04,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:48:04,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136744365] [2021-06-12 20:48:04,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:48:04,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:04,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:48:04,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:48:04,751 INFO L87 Difference]: Start difference. First operand 3430 states and 13273 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:08,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:08,575 INFO L93 Difference]: Finished difference Result 5894 states and 21603 transitions. [2021-06-12 20:48:08,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-12 20:48:08,575 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:48:08,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:08,585 INFO L225 Difference]: With dead ends: 5894 [2021-06-12 20:48:08,585 INFO L226 Difference]: Without dead ends: 5874 [2021-06-12 20:48:08,585 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2910 ImplicationChecksByTransitivity, 3210.1ms TimeCoverageRelationStatistics Valid=1122, Invalid=7434, Unknown=0, NotChecked=0, Total=8556 [2021-06-12 20:48:08,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5874 states. [2021-06-12 20:48:08,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5874 to 3430. [2021-06-12 20:48:08,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3430 states, 3429 states have (on average 3.8708078156897057) internal successors, (13273), 3429 states have internal predecessors, (13273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:08,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 13273 transitions. [2021-06-12 20:48:08,648 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 13273 transitions. Word has length 24 [2021-06-12 20:48:08,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:08,648 INFO L482 AbstractCegarLoop]: Abstraction has 3430 states and 13273 transitions. [2021-06-12 20:48:08,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:08,648 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 13273 transitions. [2021-06-12 20:48:08,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:48:08,653 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:08,653 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:08,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable735,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:08,857 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:48:08,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:08,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1080747266, now seen corresponding path program 244 times [2021-06-12 20:48:08,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:08,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239731049] [2021-06-12 20:48:08,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:09,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:09,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239731049] [2021-06-12 20:48:09,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239731049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:09,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167939505] [2021-06-12 20:48:09,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:09,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:48:09,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:09,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:48:09,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:09,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:48:09,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:09,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:09,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:09,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-12 20:48:09,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:09,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167939505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:09,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:09,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:48:09,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735734941] [2021-06-12 20:48:09,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:48:09,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:09,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:48:09,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:48:09,255 INFO L87 Difference]: Start difference. First operand 3430 states and 13273 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:12,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:12,353 INFO L93 Difference]: Finished difference Result 4990 states and 18316 transitions. [2021-06-12 20:48:12,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-12 20:48:12,353 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:48:12,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:12,360 INFO L225 Difference]: With dead ends: 4990 [2021-06-12 20:48:12,360 INFO L226 Difference]: Without dead ends: 4962 [2021-06-12 20:48:12,361 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1993 ImplicationChecksByTransitivity, 2322.8ms TimeCoverageRelationStatistics Valid=878, Invalid=5602, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 20:48:12,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4962 states. [2021-06-12 20:48:12,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4962 to 3435. [2021-06-12 20:48:12,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 3.8698311007571347) internal successors, (13289), 3434 states have internal predecessors, (13289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:12,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 13289 transitions. [2021-06-12 20:48:12,410 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 13289 transitions. Word has length 24 [2021-06-12 20:48:12,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:12,410 INFO L482 AbstractCegarLoop]: Abstraction has 3435 states and 13289 transitions. [2021-06-12 20:48:12,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:12,411 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 13289 transitions. [2021-06-12 20:48:12,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:48:12,416 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:12,416 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:12,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable736,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:12,616 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:48:12,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:12,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1071844342, now seen corresponding path program 245 times [2021-06-12 20:48:12,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:12,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518946304] [2021-06-12 20:48:12,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:12,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:12,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:12,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:12,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518946304] [2021-06-12 20:48:12,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518946304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:12,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003025916] [2021-06-12 20:48:12,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:12,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:48:12,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:12,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:48:12,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:12,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:48:12,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:12,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:12,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:12,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:48:12,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:12,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003025916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:12,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:12,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:48:12,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055515856] [2021-06-12 20:48:12,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:48:12,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:12,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:48:12,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:48:12,988 INFO L87 Difference]: Start difference. First operand 3435 states and 13289 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:15,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:15,522 INFO L93 Difference]: Finished difference Result 4925 states and 18087 transitions. [2021-06-12 20:48:15,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 20:48:15,523 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:48:15,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:15,531 INFO L225 Difference]: With dead ends: 4925 [2021-06-12 20:48:15,531 INFO L226 Difference]: Without dead ends: 4886 [2021-06-12 20:48:15,531 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1883.4ms TimeCoverageRelationStatistics Valid=607, Invalid=3683, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 20:48:15,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4886 states. [2021-06-12 20:48:15,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4886 to 3438. [2021-06-12 20:48:15,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 3437 states have (on average 3.8687809135874307) internal successors, (13297), 3437 states have internal predecessors, (13297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:15,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 13297 transitions. [2021-06-12 20:48:15,587 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 13297 transitions. Word has length 24 [2021-06-12 20:48:15,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:15,587 INFO L482 AbstractCegarLoop]: Abstraction has 3438 states and 13297 transitions. [2021-06-12 20:48:15,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:15,587 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 13297 transitions. [2021-06-12 20:48:15,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:48:15,591 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:15,591 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:15,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable737 [2021-06-12 20:48:15,792 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:48:15,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:15,792 INFO L82 PathProgramCache]: Analyzing trace with hash 864399170, now seen corresponding path program 246 times [2021-06-12 20:48:15,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:15,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798915521] [2021-06-12 20:48:15,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:15,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:15,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:15,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798915521] [2021-06-12 20:48:15,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798915521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:15,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482627744] [2021-06-12 20:48:15,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:15,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:48:15,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:15,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:48:15,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:16,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:16,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:16,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:16,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:16,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-06-12 20:48:16,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:48:16,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:16,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:16,199 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:18 [2021-06-12 20:48:16,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:16,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482627744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:16,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:16,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:48:16,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481279673] [2021-06-12 20:48:16,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:48:16,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:16,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:48:16,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:48:16,264 INFO L87 Difference]: Start difference. First operand 3438 states and 13297 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:18,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:18,428 INFO L93 Difference]: Finished difference Result 4581 states and 17132 transitions. [2021-06-12 20:48:18,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 20:48:18,428 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:48:18,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:18,435 INFO L225 Difference]: With dead ends: 4581 [2021-06-12 20:48:18,435 INFO L226 Difference]: Without dead ends: 4562 [2021-06-12 20:48:18,436 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1798.0ms TimeCoverageRelationStatistics Valid=567, Invalid=2973, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 20:48:18,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4562 states. [2021-06-12 20:48:18,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4562 to 3434. [2021-06-12 20:48:18,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 3.870958345470434) internal successors, (13289), 3433 states have internal predecessors, (13289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:18,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 13289 transitions. [2021-06-12 20:48:18,485 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 13289 transitions. Word has length 24 [2021-06-12 20:48:18,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:18,485 INFO L482 AbstractCegarLoop]: Abstraction has 3434 states and 13289 transitions. [2021-06-12 20:48:18,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:18,485 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 13289 transitions. [2021-06-12 20:48:18,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:48:18,489 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:18,489 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:18,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable738,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:18,690 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:48:18,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:18,690 INFO L82 PathProgramCache]: Analyzing trace with hash 687857738, now seen corresponding path program 247 times [2021-06-12 20:48:18,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:18,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805898025] [2021-06-12 20:48:18,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:18,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:18,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:18,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:18,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805898025] [2021-06-12 20:48:18,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805898025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:18,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238542194] [2021-06-12 20:48:18,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:18,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:18,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:48:18,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:18,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:48:18,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:18,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:18,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:18,986 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:48:19,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:19,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238542194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:19,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:19,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:48:19,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097314588] [2021-06-12 20:48:19,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:48:19,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:19,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:48:19,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:48:19,030 INFO L87 Difference]: Start difference. First operand 3434 states and 13289 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:20,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:20,063 INFO L93 Difference]: Finished difference Result 4592 states and 17139 transitions. [2021-06-12 20:48:20,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:48:20,064 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:48:20,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:20,072 INFO L225 Difference]: With dead ends: 4592 [2021-06-12 20:48:20,072 INFO L226 Difference]: Without dead ends: 4583 [2021-06-12 20:48:20,072 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 820.2ms TimeCoverageRelationStatistics Valid=306, Invalid=1500, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:48:20,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4583 states. [2021-06-12 20:48:20,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4583 to 3439. [2021-06-12 20:48:20,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3439 states, 3438 states have (on average 3.8694008144269922) internal successors, (13303), 3438 states have internal predecessors, (13303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:20,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3439 states to 3439 states and 13303 transitions. [2021-06-12 20:48:20,121 INFO L78 Accepts]: Start accepts. Automaton has 3439 states and 13303 transitions. Word has length 24 [2021-06-12 20:48:20,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:20,121 INFO L482 AbstractCegarLoop]: Abstraction has 3439 states and 13303 transitions. [2021-06-12 20:48:20,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:20,121 INFO L276 IsEmpty]: Start isEmpty. Operand 3439 states and 13303 transitions. [2021-06-12 20:48:20,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:48:20,125 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:20,125 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:20,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable742 [2021-06-12 20:48:20,326 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:48:20,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:20,326 INFO L82 PathProgramCache]: Analyzing trace with hash -145880702, now seen corresponding path program 248 times [2021-06-12 20:48:20,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:20,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257773354] [2021-06-12 20:48:20,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:20,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:20,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:20,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:20,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257773354] [2021-06-12 20:48:20,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257773354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:20,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544907405] [2021-06-12 20:48:20,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:20,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:48:20,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:20,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:48:20,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:20,650 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:20,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:48:20,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:20,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:20,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:20,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:48:20,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:20,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544907405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:20,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:20,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:48:20,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502163021] [2021-06-12 20:48:20,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:48:20,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:20,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:48:20,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:48:20,749 INFO L87 Difference]: Start difference. First operand 3439 states and 13303 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:23,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:23,044 INFO L93 Difference]: Finished difference Result 4712 states and 17417 transitions. [2021-06-12 20:48:23,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 20:48:23,045 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:48:23,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:23,051 INFO L225 Difference]: With dead ends: 4712 [2021-06-12 20:48:23,051 INFO L226 Difference]: Without dead ends: 4702 [2021-06-12 20:48:23,052 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 1962.7ms TimeCoverageRelationStatistics Valid=636, Invalid=3270, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 20:48:23,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4702 states. [2021-06-12 20:48:23,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4702 to 3436. [2021-06-12 20:48:23,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3436 states, 3435 states have (on average 3.871033478893741) internal successors, (13297), 3435 states have internal predecessors, (13297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:23,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3436 states to 3436 states and 13297 transitions. [2021-06-12 20:48:23,100 INFO L78 Accepts]: Start accepts. Automaton has 3436 states and 13297 transitions. Word has length 24 [2021-06-12 20:48:23,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:23,100 INFO L482 AbstractCegarLoop]: Abstraction has 3436 states and 13297 transitions. [2021-06-12 20:48:23,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:23,100 INFO L276 IsEmpty]: Start isEmpty. Operand 3436 states and 13297 transitions. [2021-06-12 20:48:23,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:48:23,104 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:23,105 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:23,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable743 [2021-06-12 20:48:23,305 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:48:23,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:23,305 INFO L82 PathProgramCache]: Analyzing trace with hash 635953098, now seen corresponding path program 249 times [2021-06-12 20:48:23,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:23,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735652496] [2021-06-12 20:48:23,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:23,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:23,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:23,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:23,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735652496] [2021-06-12 20:48:23,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735652496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:23,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852725786] [2021-06-12 20:48:23,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:23,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:48:23,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:23,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:48:23,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:23,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:23,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:23,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:48:23,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:23,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:23,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:23,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:7 [2021-06-12 20:48:23,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:23,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852725786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:23,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:23,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:48:23,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24705618] [2021-06-12 20:48:23,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:48:23,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:23,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:48:23,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:48:23,677 INFO L87 Difference]: Start difference. First operand 3436 states and 13297 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:25,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:25,152 INFO L93 Difference]: Finished difference Result 4517 states and 16899 transitions. [2021-06-12 20:48:25,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:48:25,152 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:48:25,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:25,158 INFO L225 Difference]: With dead ends: 4517 [2021-06-12 20:48:25,159 INFO L226 Difference]: Without dead ends: 4507 [2021-06-12 20:48:25,159 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1225.8ms TimeCoverageRelationStatistics Valid=390, Invalid=2160, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:48:25,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4507 states. [2021-06-12 20:48:25,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4507 to 3430. [2021-06-12 20:48:25,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3430 states, 3429 states have (on average 3.8708078156897057) internal successors, (13273), 3429 states have internal predecessors, (13273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:25,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 13273 transitions. [2021-06-12 20:48:25,206 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 13273 transitions. Word has length 24 [2021-06-12 20:48:25,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:25,206 INFO L482 AbstractCegarLoop]: Abstraction has 3430 states and 13273 transitions. [2021-06-12 20:48:25,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:25,206 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 13273 transitions. [2021-06-12 20:48:25,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:48:25,210 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:25,210 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:25,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable746,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:25,411 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:48:25,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:25,411 INFO L82 PathProgramCache]: Analyzing trace with hash -305635602, now seen corresponding path program 21 times [2021-06-12 20:48:25,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:25,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505876957] [2021-06-12 20:48:25,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:25,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:25,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:25,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:25,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505876957] [2021-06-12 20:48:25,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505876957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:25,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639437466] [2021-06-12 20:48:25,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:25,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:48:25,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:25,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:48:25,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:25,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:25,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:25,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:48:25,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:25,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:25,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:25,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 20:48:25,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:25,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639437466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:25,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:25,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:48:25,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279208605] [2021-06-12 20:48:25,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:48:25,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:25,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:48:25,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:48:25,827 INFO L87 Difference]: Start difference. First operand 3430 states and 13273 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:29,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:29,523 INFO L93 Difference]: Finished difference Result 5710 states and 20952 transitions. [2021-06-12 20:48:29,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-12 20:48:29,523 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:48:29,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:29,533 INFO L225 Difference]: With dead ends: 5710 [2021-06-12 20:48:29,533 INFO L226 Difference]: Without dead ends: 5688 [2021-06-12 20:48:29,534 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2936 ImplicationChecksByTransitivity, 3187.6ms TimeCoverageRelationStatistics Valid=1127, Invalid=7615, Unknown=0, NotChecked=0, Total=8742 [2021-06-12 20:48:29,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5688 states. [2021-06-12 20:48:29,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5688 to 3430. [2021-06-12 20:48:29,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3430 states, 3429 states have (on average 3.8708078156897057) internal successors, (13273), 3429 states have internal predecessors, (13273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:29,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 13273 transitions. [2021-06-12 20:48:29,598 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 13273 transitions. Word has length 24 [2021-06-12 20:48:29,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:29,598 INFO L482 AbstractCegarLoop]: Abstraction has 3430 states and 13273 transitions. [2021-06-12 20:48:29,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:29,598 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 13273 transitions. [2021-06-12 20:48:29,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:48:29,603 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:29,603 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:29,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable747 [2021-06-12 20:48:29,813 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:48:29,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:29,813 INFO L82 PathProgramCache]: Analyzing trace with hash -815151466, now seen corresponding path program 22 times [2021-06-12 20:48:29,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:29,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929795459] [2021-06-12 20:48:29,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:29,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:29,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:29,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:29,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929795459] [2021-06-12 20:48:29,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929795459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:29,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905632489] [2021-06-12 20:48:29,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:30,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:48:30,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:30,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:48:30,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:30,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:48:30,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:30,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:30,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:30,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:48:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:30,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905632489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:30,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:30,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:48:30,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549732801] [2021-06-12 20:48:30,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:48:30,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:30,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:48:30,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:48:30,180 INFO L87 Difference]: Start difference. First operand 3430 states and 13273 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:33,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:33,261 INFO L93 Difference]: Finished difference Result 4808 states and 17690 transitions. [2021-06-12 20:48:33,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-12 20:48:33,261 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:48:33,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:33,269 INFO L225 Difference]: With dead ends: 4808 [2021-06-12 20:48:33,269 INFO L226 Difference]: Without dead ends: 4779 [2021-06-12 20:48:33,269 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2011 ImplicationChecksByTransitivity, 2233.9ms TimeCoverageRelationStatistics Valid=878, Invalid=5602, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 20:48:33,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4779 states. [2021-06-12 20:48:33,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4779 to 3437. [2021-06-12 20:48:33,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3437 states, 3436 states have (on average 3.869906868451688) internal successors, (13297), 3436 states have internal predecessors, (13297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:33,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3437 states to 3437 states and 13297 transitions. [2021-06-12 20:48:33,334 INFO L78 Accepts]: Start accepts. Automaton has 3437 states and 13297 transitions. Word has length 24 [2021-06-12 20:48:33,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:33,334 INFO L482 AbstractCegarLoop]: Abstraction has 3437 states and 13297 transitions. [2021-06-12 20:48:33,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:33,334 INFO L276 IsEmpty]: Start isEmpty. Operand 3437 states and 13297 transitions. [2021-06-12 20:48:33,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:48:33,339 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:33,339 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:33,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable748,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:33,547 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:48:33,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:33,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1024688846, now seen corresponding path program 23 times [2021-06-12 20:48:33,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:33,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237358530] [2021-06-12 20:48:33,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:33,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:33,725 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:33,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:33,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237358530] [2021-06-12 20:48:33,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237358530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:33,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208772438] [2021-06-12 20:48:33,725 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:33,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:48:33,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:33,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:48:33,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:33,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:48:33,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:33,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:33,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:33,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:48:33,910 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:33,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208772438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:33,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:33,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:48:33,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762577800] [2021-06-12 20:48:33,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:48:33,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:33,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:48:33,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:48:33,911 INFO L87 Difference]: Start difference. First operand 3437 states and 13297 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:36,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:36,395 INFO L93 Difference]: Finished difference Result 4743 states and 17460 transitions. [2021-06-12 20:48:36,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 20:48:36,395 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:48:36,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:36,402 INFO L225 Difference]: With dead ends: 4743 [2021-06-12 20:48:36,402 INFO L226 Difference]: Without dead ends: 4703 [2021-06-12 20:48:36,402 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 1817.8ms TimeCoverageRelationStatistics Valid=607, Invalid=3683, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 20:48:36,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4703 states. [2021-06-12 20:48:36,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4703 to 3440. [2021-06-12 20:48:36,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3440 states, 3439 states have (on average 3.869438790346031) internal successors, (13307), 3439 states have internal predecessors, (13307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:36,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3440 states to 3440 states and 13307 transitions. [2021-06-12 20:48:36,449 INFO L78 Accepts]: Start accepts. Automaton has 3440 states and 13307 transitions. Word has length 24 [2021-06-12 20:48:36,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:36,449 INFO L482 AbstractCegarLoop]: Abstraction has 3440 states and 13307 transitions. [2021-06-12 20:48:36,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:36,449 INFO L276 IsEmpty]: Start isEmpty. Operand 3440 states and 13307 transitions. [2021-06-12 20:48:36,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:48:36,454 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:36,454 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:36,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable749,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:36,654 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:48:36,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:36,654 INFO L82 PathProgramCache]: Analyzing trace with hash 703982900, now seen corresponding path program 24 times [2021-06-12 20:48:36,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:36,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658640961] [2021-06-12 20:48:36,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:36,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:36,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:36,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658640961] [2021-06-12 20:48:36,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658640961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:36,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660405999] [2021-06-12 20:48:36,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:36,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:48:36,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:36,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 20:48:36,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:37,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:37,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:37,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:37,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:37,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-06-12 20:48:37,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:48:37,068 INFO L628 ElimStorePlain]: treesize reduction 27, result has 47.1 percent of original size [2021-06-12 20:48:37,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:37,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:18 [2021-06-12 20:48:37,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:37,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660405999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:37,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:37,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:48:37,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120743247] [2021-06-12 20:48:37,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:48:37,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:37,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:48:37,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:48:37,134 INFO L87 Difference]: Start difference. First operand 3440 states and 13307 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:38,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:38,668 INFO L93 Difference]: Finished difference Result 4481 states and 16783 transitions. [2021-06-12 20:48:38,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:48:38,669 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:48:38,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:38,675 INFO L225 Difference]: With dead ends: 4481 [2021-06-12 20:48:38,676 INFO L226 Difference]: Without dead ends: 4462 [2021-06-12 20:48:38,676 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1319.9ms TimeCoverageRelationStatistics Valid=403, Invalid=2353, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 20:48:38,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4462 states. [2021-06-12 20:48:38,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4462 to 3435. [2021-06-12 20:48:38,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 3.870995923121724) internal successors, (13293), 3434 states have internal predecessors, (13293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:38,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 13293 transitions. [2021-06-12 20:48:38,724 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 13293 transitions. Word has length 24 [2021-06-12 20:48:38,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:38,724 INFO L482 AbstractCegarLoop]: Abstraction has 3435 states and 13293 transitions. [2021-06-12 20:48:38,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:38,725 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 13293 transitions. [2021-06-12 20:48:38,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:48:38,729 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:38,729 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:38,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable750,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:38,930 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:48:38,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:38,930 INFO L82 PathProgramCache]: Analyzing trace with hash -324166960, now seen corresponding path program 25 times [2021-06-12 20:48:38,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:38,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908546275] [2021-06-12 20:48:38,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:38,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:39,078 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:39,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:39,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908546275] [2021-06-12 20:48:39,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908546275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:39,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739662255] [2021-06-12 20:48:39,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:39,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:48:39,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:39,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:48:39,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:39,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:39,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:39,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:48:39,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:39,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739662255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:39,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:39,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:48:39,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425712947] [2021-06-12 20:48:39,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:48:39,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:39,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:48:39,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:48:39,251 INFO L87 Difference]: Start difference. First operand 3435 states and 13293 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:40,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:40,305 INFO L93 Difference]: Finished difference Result 4403 states and 16490 transitions. [2021-06-12 20:48:40,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:48:40,305 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:48:40,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:40,312 INFO L225 Difference]: With dead ends: 4403 [2021-06-12 20:48:40,312 INFO L226 Difference]: Without dead ends: 4394 [2021-06-12 20:48:40,312 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 808.9ms TimeCoverageRelationStatistics Valid=306, Invalid=1500, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:48:40,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4394 states. [2021-06-12 20:48:40,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4394 to 3444. [2021-06-12 20:48:40,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3444 states, 3443 states have (on average 3.869009584664537) internal successors, (13321), 3443 states have internal predecessors, (13321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:40,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3444 states to 3444 states and 13321 transitions. [2021-06-12 20:48:40,363 INFO L78 Accepts]: Start accepts. Automaton has 3444 states and 13321 transitions. Word has length 24 [2021-06-12 20:48:40,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:40,363 INFO L482 AbstractCegarLoop]: Abstraction has 3444 states and 13321 transitions. [2021-06-12 20:48:40,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:40,363 INFO L276 IsEmpty]: Start isEmpty. Operand 3444 states and 13321 transitions. [2021-06-12 20:48:40,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:48:40,368 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:40,368 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:40,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable754,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:40,569 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:48:40,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:40,569 INFO L82 PathProgramCache]: Analyzing trace with hash -580782, now seen corresponding path program 26 times [2021-06-12 20:48:40,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:40,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983561097] [2021-06-12 20:48:40,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:40,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:40,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:40,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:40,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983561097] [2021-06-12 20:48:40,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983561097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:40,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206979768] [2021-06-12 20:48:40,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:40,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:48:40,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:40,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:48:40,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:40,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:40,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:48:40,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:40,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:40,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:40,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:48:41,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:41,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206979768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:41,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:41,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:48:41,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119717492] [2021-06-12 20:48:41,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:48:41,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:41,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:48:41,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:48:41,062 INFO L87 Difference]: Start difference. First operand 3444 states and 13321 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:43,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:43,458 INFO L93 Difference]: Finished difference Result 4536 states and 16812 transitions. [2021-06-12 20:48:43,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 20:48:43,459 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:48:43,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:43,465 INFO L225 Difference]: With dead ends: 4536 [2021-06-12 20:48:43,465 INFO L226 Difference]: Without dead ends: 4525 [2021-06-12 20:48:43,466 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 2054.2ms TimeCoverageRelationStatistics Valid=636, Invalid=3270, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 20:48:43,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4525 states. [2021-06-12 20:48:43,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4525 to 3446. [2021-06-12 20:48:43,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3446 states, 3445 states have (on average 3.8685050798258347) internal successors, (13327), 3445 states have internal predecessors, (13327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:43,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3446 states to 3446 states and 13327 transitions. [2021-06-12 20:48:43,513 INFO L78 Accepts]: Start accepts. Automaton has 3446 states and 13327 transitions. Word has length 24 [2021-06-12 20:48:43,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:43,513 INFO L482 AbstractCegarLoop]: Abstraction has 3446 states and 13327 transitions. [2021-06-12 20:48:43,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:43,514 INFO L276 IsEmpty]: Start isEmpty. Operand 3446 states and 13327 transitions. [2021-06-12 20:48:43,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:48:43,518 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:43,518 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:43,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable755 [2021-06-12 20:48:43,718 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:48:43,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:43,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1685163340, now seen corresponding path program 27 times [2021-06-12 20:48:43,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:43,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048389855] [2021-06-12 20:48:43,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:43,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:43,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:43,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:43,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048389855] [2021-06-12 20:48:43,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048389855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:43,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897711478] [2021-06-12 20:48:43,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:43,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 20:48:43,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:43,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:48:43,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:44,053 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:44,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:48:44,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:44,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:44,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:44,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:48:44,143 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:44,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897711478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:44,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:44,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:48:44,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593628505] [2021-06-12 20:48:44,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:48:44,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:44,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:48:44,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:48:44,144 INFO L87 Difference]: Start difference. First operand 3446 states and 13327 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:46,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:46,068 INFO L93 Difference]: Finished difference Result 4381 states and 16352 transitions. [2021-06-12 20:48:46,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 20:48:46,069 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:48:46,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:46,075 INFO L225 Difference]: With dead ends: 4381 [2021-06-12 20:48:46,075 INFO L226 Difference]: Without dead ends: 4370 [2021-06-12 20:48:46,075 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 1620.6ms TimeCoverageRelationStatistics Valid=503, Invalid=2689, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 20:48:46,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4370 states. [2021-06-12 20:48:46,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4370 to 3430. [2021-06-12 20:48:46,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3430 states, 3429 states have (on average 3.8708078156897057) internal successors, (13273), 3429 states have internal predecessors, (13273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:46,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 13273 transitions. [2021-06-12 20:48:46,122 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 13273 transitions. Word has length 24 [2021-06-12 20:48:46,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:46,122 INFO L482 AbstractCegarLoop]: Abstraction has 3430 states and 13273 transitions. [2021-06-12 20:48:46,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:46,122 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 13273 transitions. [2021-06-12 20:48:46,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:48:46,126 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:46,126 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:46,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable758,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:46,327 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:48:46,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:46,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1006805604, now seen corresponding path program 250 times [2021-06-12 20:48:46,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:46,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439122467] [2021-06-12 20:48:46,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:46,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:46,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:46,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439122467] [2021-06-12 20:48:46,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439122467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:46,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040228054] [2021-06-12 20:48:46,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:46,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:48:46,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:46,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:48:46,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:46,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:48:46,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:46,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:46,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:46,670 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:48:46,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:46,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040228054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:46,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:46,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:48:46,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543326428] [2021-06-12 20:48:46,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:48:46,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:46,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:48:46,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:48:46,698 INFO L87 Difference]: Start difference. First operand 3430 states and 13273 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:48,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:48,739 INFO L93 Difference]: Finished difference Result 4524 states and 16773 transitions. [2021-06-12 20:48:48,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 20:48:48,740 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:48:48,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:48,747 INFO L225 Difference]: With dead ends: 4524 [2021-06-12 20:48:48,747 INFO L226 Difference]: Without dead ends: 4506 [2021-06-12 20:48:48,748 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1359.3ms TimeCoverageRelationStatistics Valid=527, Invalid=3379, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 20:48:48,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4506 states. [2021-06-12 20:48:48,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4506 to 3431. [2021-06-12 20:48:48,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3431 states, 3430 states have (on average 3.8705539358600585) internal successors, (13276), 3430 states have internal predecessors, (13276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:48,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3431 states to 3431 states and 13276 transitions. [2021-06-12 20:48:48,797 INFO L78 Accepts]: Start accepts. Automaton has 3431 states and 13276 transitions. Word has length 24 [2021-06-12 20:48:48,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:48,797 INFO L482 AbstractCegarLoop]: Abstraction has 3431 states and 13276 transitions. [2021-06-12 20:48:48,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:48,797 INFO L276 IsEmpty]: Start isEmpty. Operand 3431 states and 13276 transitions. [2021-06-12 20:48:48,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:48:48,801 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:48,801 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:49,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable760 [2021-06-12 20:48:49,002 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:48:49,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:49,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1780079634, now seen corresponding path program 251 times [2021-06-12 20:48:49,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:49,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395708939] [2021-06-12 20:48:49,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:49,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:49,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395708939] [2021-06-12 20:48:49,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395708939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:49,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748503161] [2021-06-12 20:48:49,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:49,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:48:49,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:49,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:48:49,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:49,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:48:49,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:49,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:49,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:49,358 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:48:49,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:49,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748503161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:49,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:49,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:48:49,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383719639] [2021-06-12 20:48:49,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:48:49,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:49,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:48:49,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:48:49,385 INFO L87 Difference]: Start difference. First operand 3431 states and 13276 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:51,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:51,631 INFO L93 Difference]: Finished difference Result 4585 states and 16896 transitions. [2021-06-12 20:48:51,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 20:48:51,632 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:48:51,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:51,639 INFO L225 Difference]: With dead ends: 4585 [2021-06-12 20:48:51,639 INFO L226 Difference]: Without dead ends: 4550 [2021-06-12 20:48:51,639 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 1578.4ms TimeCoverageRelationStatistics Valid=512, Invalid=3394, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 20:48:51,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4550 states. [2021-06-12 20:48:51,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4550 to 3435. [2021-06-12 20:48:51,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 3.869539895165987) internal successors, (13288), 3434 states have internal predecessors, (13288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:51,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 13288 transitions. [2021-06-12 20:48:51,691 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 13288 transitions. Word has length 24 [2021-06-12 20:48:51,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:51,691 INFO L482 AbstractCegarLoop]: Abstraction has 3435 states and 13288 transitions. [2021-06-12 20:48:51,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:51,691 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 13288 transitions. [2021-06-12 20:48:51,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:48:51,695 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:51,695 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:51,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-06-12 20:48:51,896 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:48:51,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:51,896 INFO L82 PathProgramCache]: Analyzing trace with hash -578644150, now seen corresponding path program 252 times [2021-06-12 20:48:51,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:51,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33855733] [2021-06-12 20:48:51,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:51,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:52,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:52,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:52,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33855733] [2021-06-12 20:48:52,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33855733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:52,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956148198] [2021-06-12 20:48:52,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:52,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:48:52,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:52,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:48:52,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:52,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:52,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:52,262 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:52,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-06-12 20:48:52,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:48:52,286 INFO L628 ElimStorePlain]: treesize reduction 25, result has 46.8 percent of original size [2021-06-12 20:48:52,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:52,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-06-12 20:48:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:52,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956148198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:52,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:52,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:48:52,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351054676] [2021-06-12 20:48:52,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:48:52,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:52,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:48:52,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:48:52,347 INFO L87 Difference]: Start difference. First operand 3435 states and 13288 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:54,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:54,490 INFO L93 Difference]: Finished difference Result 4544 states and 16857 transitions. [2021-06-12 20:48:54,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 20:48:54,490 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:48:54,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:54,497 INFO L225 Difference]: With dead ends: 4544 [2021-06-12 20:48:54,497 INFO L226 Difference]: Without dead ends: 4518 [2021-06-12 20:48:54,498 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 1756.7ms TimeCoverageRelationStatistics Valid=580, Invalid=3976, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 20:48:54,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4518 states. [2021-06-12 20:48:54,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4518 to 3435. [2021-06-12 20:48:54,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 3.8707047175305767) internal successors, (13292), 3434 states have internal predecessors, (13292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:54,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 13292 transitions. [2021-06-12 20:48:54,565 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 13292 transitions. Word has length 24 [2021-06-12 20:48:54,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:54,565 INFO L482 AbstractCegarLoop]: Abstraction has 3435 states and 13292 transitions. [2021-06-12 20:48:54,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:54,565 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 13292 transitions. [2021-06-12 20:48:54,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:48:54,570 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:54,570 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:54,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable762,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:54,772 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:48:54,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:54,772 INFO L82 PathProgramCache]: Analyzing trace with hash -755185582, now seen corresponding path program 253 times [2021-06-12 20:48:54,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:54,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236775849] [2021-06-12 20:48:54,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:54,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:54,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:54,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236775849] [2021-06-12 20:48:54,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236775849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:54,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252833756] [2021-06-12 20:48:54,925 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:54,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:54,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:48:54,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:55,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:48:55,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:55,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:55,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:55,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:48:55,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:55,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252833756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:55,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:55,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:48:55,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520508782] [2021-06-12 20:48:55,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:48:55,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:55,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:48:55,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:48:55,103 INFO L87 Difference]: Start difference. First operand 3435 states and 13292 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:56,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:56,214 INFO L93 Difference]: Finished difference Result 4319 states and 16194 transitions. [2021-06-12 20:48:56,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 20:48:56,214 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:48:56,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:56,221 INFO L225 Difference]: With dead ends: 4319 [2021-06-12 20:48:56,221 INFO L226 Difference]: Without dead ends: 4310 [2021-06-12 20:48:56,221 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 904.8ms TimeCoverageRelationStatistics Valid=369, Invalid=2081, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:48:56,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4310 states. [2021-06-12 20:48:56,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4310 to 3437. [2021-06-12 20:48:56,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3437 states, 3436 states have (on average 3.870197904540163) internal successors, (13298), 3436 states have internal predecessors, (13298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:56,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3437 states to 3437 states and 13298 transitions. [2021-06-12 20:48:56,283 INFO L78 Accepts]: Start accepts. Automaton has 3437 states and 13298 transitions. Word has length 24 [2021-06-12 20:48:56,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:56,283 INFO L482 AbstractCegarLoop]: Abstraction has 3437 states and 13298 transitions. [2021-06-12 20:48:56,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:56,283 INFO L276 IsEmpty]: Start isEmpty. Operand 3437 states and 13298 transitions. [2021-06-12 20:48:56,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:48:56,287 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:56,287 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:56,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable766 [2021-06-12 20:48:56,488 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:48:56,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:56,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1588924022, now seen corresponding path program 254 times [2021-06-12 20:48:56,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:56,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291309017] [2021-06-12 20:48:56,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:56,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:56,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:56,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:56,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291309017] [2021-06-12 20:48:56,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291309017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:56,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886632203] [2021-06-12 20:48:56,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:56,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:48:56,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:56,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:48:56,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:56,787 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:56,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:48:56,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:56,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:56,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:56,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:48:56,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:56,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886632203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:56,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:56,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:48:56,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125633400] [2021-06-12 20:48:56,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:48:56,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:56,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:48:56,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:48:56,884 INFO L87 Difference]: Start difference. First operand 3437 states and 13298 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:58,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:58,821 INFO L93 Difference]: Finished difference Result 4391 states and 16320 transitions. [2021-06-12 20:48:58,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 20:48:58,822 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:48:58,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:58,828 INFO L225 Difference]: With dead ends: 4391 [2021-06-12 20:48:58,828 INFO L226 Difference]: Without dead ends: 4381 [2021-06-12 20:48:58,828 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 1612.3ms TimeCoverageRelationStatistics Valid=556, Invalid=2866, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 20:48:58,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4381 states. [2021-06-12 20:48:58,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4381 to 3437. [2021-06-12 20:48:58,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3437 states, 3436 states have (on average 3.871071012805588) internal successors, (13301), 3436 states have internal predecessors, (13301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:58,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3437 states to 3437 states and 13301 transitions. [2021-06-12 20:48:58,875 INFO L78 Accepts]: Start accepts. Automaton has 3437 states and 13301 transitions. Word has length 24 [2021-06-12 20:48:58,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:58,875 INFO L482 AbstractCegarLoop]: Abstraction has 3437 states and 13301 transitions. [2021-06-12 20:48:58,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:58,875 INFO L276 IsEmpty]: Start isEmpty. Operand 3437 states and 13301 transitions. [2021-06-12 20:48:58,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:48:58,879 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:58,879 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:59,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable767,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:59,079 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:48:59,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:59,080 INFO L82 PathProgramCache]: Analyzing trace with hash -807090222, now seen corresponding path program 255 times [2021-06-12 20:48:59,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:59,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887031113] [2021-06-12 20:48:59,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:59,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:59,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:59,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887031113] [2021-06-12 20:48:59,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887031113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:59,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846533152] [2021-06-12 20:48:59,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:59,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:48:59,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:59,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:48:59,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:59,371 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:59,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:48:59,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:59,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:59,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:59,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:48:59,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:59,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846533152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:59,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:59,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:48:59,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455864406] [2021-06-12 20:48:59,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:48:59,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:59,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:48:59,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:48:59,454 INFO L87 Difference]: Start difference. First operand 3437 states and 13301 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:00,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:00,877 INFO L93 Difference]: Finished difference Result 4263 states and 15959 transitions. [2021-06-12 20:49:00,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 20:49:00,878 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:49:00,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:00,884 INFO L225 Difference]: With dead ends: 4263 [2021-06-12 20:49:00,884 INFO L226 Difference]: Without dead ends: 4253 [2021-06-12 20:49:00,885 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1196.5ms TimeCoverageRelationStatistics Valid=378, Invalid=2172, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:49:00,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4253 states. [2021-06-12 20:49:00,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4253 to 3432. [2021-06-12 20:49:00,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3432 states, 3431 states have (on average 3.8705916642378315) internal successors, (13280), 3431 states have internal predecessors, (13280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:00,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3432 states to 3432 states and 13280 transitions. [2021-06-12 20:49:00,932 INFO L78 Accepts]: Start accepts. Automaton has 3432 states and 13280 transitions. Word has length 24 [2021-06-12 20:49:00,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:00,932 INFO L482 AbstractCegarLoop]: Abstraction has 3432 states and 13280 transitions. [2021-06-12 20:49:00,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:00,932 INFO L276 IsEmpty]: Start isEmpty. Operand 3432 states and 13280 transitions. [2021-06-12 20:49:00,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:49:00,937 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:00,937 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:01,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable770,388 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:01,137 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:49:01,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:01,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1937128230, now seen corresponding path program 28 times [2021-06-12 20:49:01,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:01,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229474694] [2021-06-12 20:49:01,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:01,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:01,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:01,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:01,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229474694] [2021-06-12 20:49:01,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229474694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:01,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795047953] [2021-06-12 20:49:01,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:01,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:49:01,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:01,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:49:01,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:01,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:49:01,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:01,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:01,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:01,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-12 20:49:01,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:01,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795047953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:01,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:01,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:49:01,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386401062] [2021-06-12 20:49:01,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:49:01,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:01,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:49:01,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:49:01,496 INFO L87 Difference]: Start difference. First operand 3432 states and 13280 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:03,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:03,465 INFO L93 Difference]: Finished difference Result 4541 states and 16821 transitions. [2021-06-12 20:49:03,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 20:49:03,465 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:49:03,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:03,472 INFO L225 Difference]: With dead ends: 4541 [2021-06-12 20:49:03,473 INFO L226 Difference]: Without dead ends: 4523 [2021-06-12 20:49:03,473 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1324.2ms TimeCoverageRelationStatistics Valid=527, Invalid=3379, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 20:49:03,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4523 states. [2021-06-12 20:49:03,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4523 to 3432. [2021-06-12 20:49:03,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3432 states, 3431 states have (on average 3.8705916642378315) internal successors, (13280), 3431 states have internal predecessors, (13280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:03,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3432 states to 3432 states and 13280 transitions. [2021-06-12 20:49:03,520 INFO L78 Accepts]: Start accepts. Automaton has 3432 states and 13280 transitions. Word has length 24 [2021-06-12 20:49:03,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:03,520 INFO L482 AbstractCegarLoop]: Abstraction has 3432 states and 13280 transitions. [2021-06-12 20:49:03,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:03,520 INFO L276 IsEmpty]: Start isEmpty. Operand 3432 states and 13280 transitions. [2021-06-12 20:49:03,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:49:03,524 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:03,524 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:03,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 389 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable773 [2021-06-12 20:49:03,725 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:49:03,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:03,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1727590850, now seen corresponding path program 29 times [2021-06-12 20:49:03,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:03,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612985866] [2021-06-12 20:49:03,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:03,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:03,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:03,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612985866] [2021-06-12 20:49:03,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612985866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:03,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253806152] [2021-06-12 20:49:03,905 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:03,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:49:03,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:03,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:49:03,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:04,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:49:04,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:04,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:04,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:04,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-12 20:49:04,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:04,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253806152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:04,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:04,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:49:04,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321060228] [2021-06-12 20:49:04,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:49:04,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:04,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:49:04,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:49:04,094 INFO L87 Difference]: Start difference. First operand 3432 states and 13280 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:06,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:06,258 INFO L93 Difference]: Finished difference Result 4597 states and 16922 transitions. [2021-06-12 20:49:06,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 20:49:06,258 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:49:06,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:06,265 INFO L225 Difference]: With dead ends: 4597 [2021-06-12 20:49:06,265 INFO L226 Difference]: Without dead ends: 4561 [2021-06-12 20:49:06,266 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 1502.6ms TimeCoverageRelationStatistics Valid=512, Invalid=3394, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 20:49:06,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2021-06-12 20:49:06,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 3436. [2021-06-12 20:49:06,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3436 states, 3435 states have (on average 3.870160116448326) internal successors, (13294), 3435 states have internal predecessors, (13294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:06,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3436 states to 3436 states and 13294 transitions. [2021-06-12 20:49:06,314 INFO L78 Accepts]: Start accepts. Automaton has 3436 states and 13294 transitions. Word has length 24 [2021-06-12 20:49:06,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:06,314 INFO L482 AbstractCegarLoop]: Abstraction has 3436 states and 13294 transitions. [2021-06-12 20:49:06,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:06,314 INFO L276 IsEmpty]: Start isEmpty. Operand 3436 states and 13294 transitions. [2021-06-12 20:49:06,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:49:06,318 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:06,318 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:06,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable774 [2021-06-12 20:49:06,519 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:49:06,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:06,519 INFO L82 PathProgramCache]: Analyzing trace with hash -838704700, now seen corresponding path program 30 times [2021-06-12 20:49:06,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:06,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729553520] [2021-06-12 20:49:06,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:06,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:06,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:06,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:06,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729553520] [2021-06-12 20:49:06,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729553520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:06,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302806679] [2021-06-12 20:49:06,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:06,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:49:06,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:06,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 20:49:06,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:06,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:06,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:06,932 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:06,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 48 [2021-06-12 20:49:06,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:06,966 INFO L628 ElimStorePlain]: treesize reduction 35, result has 50.0 percent of original size [2021-06-12 20:49:06,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:06,969 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:39 [2021-06-12 20:49:07,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:07,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302806679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:07,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:07,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:49:07,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482150623] [2021-06-12 20:49:07,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:49:07,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:07,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:49:07,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:49:07,050 INFO L87 Difference]: Start difference. First operand 3436 states and 13294 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:08,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:08,924 INFO L93 Difference]: Finished difference Result 4452 states and 16642 transitions. [2021-06-12 20:49:08,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:49:08,924 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:49:08,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:08,930 INFO L225 Difference]: With dead ends: 4452 [2021-06-12 20:49:08,930 INFO L226 Difference]: Without dead ends: 4433 [2021-06-12 20:49:08,931 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 1439.5ms TimeCoverageRelationStatistics Valid=466, Invalid=3194, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 20:49:08,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4433 states. [2021-06-12 20:49:08,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4433 to 3447. [2021-06-12 20:49:08,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 3446 states have (on average 3.8691236215902496) internal successors, (13333), 3446 states have internal predecessors, (13333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:08,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 13333 transitions. [2021-06-12 20:49:08,980 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 13333 transitions. Word has length 24 [2021-06-12 20:49:08,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:08,980 INFO L482 AbstractCegarLoop]: Abstraction has 3447 states and 13333 transitions. [2021-06-12 20:49:08,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:08,980 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 13333 transitions. [2021-06-12 20:49:08,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:49:08,985 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:08,985 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:09,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable775,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:09,185 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:49:09,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:09,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1866854560, now seen corresponding path program 31 times [2021-06-12 20:49:09,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:09,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525397315] [2021-06-12 20:49:09,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:09,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:09,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:09,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:09,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525397315] [2021-06-12 20:49:09,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525397315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:09,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607566885] [2021-06-12 20:49:09,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:09,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:09,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:49:09,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:09,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:49:09,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:09,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:09,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:09,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:49:09,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:09,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607566885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:09,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:09,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:49:09,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489408186] [2021-06-12 20:49:09,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:49:09,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:09,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:49:09,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:49:09,524 INFO L87 Difference]: Start difference. First operand 3447 states and 13333 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:10,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:10,714 INFO L93 Difference]: Finished difference Result 4341 states and 16273 transitions. [2021-06-12 20:49:10,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 20:49:10,714 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:49:10,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:10,720 INFO L225 Difference]: With dead ends: 4341 [2021-06-12 20:49:10,721 INFO L226 Difference]: Without dead ends: 4332 [2021-06-12 20:49:10,721 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 929.6ms TimeCoverageRelationStatistics Valid=369, Invalid=2081, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:49:10,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4332 states. [2021-06-12 20:49:10,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4332 to 3452. [2021-06-12 20:49:10,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3452 states, 3451 states have (on average 3.86815415821501) internal successors, (13349), 3451 states have internal predecessors, (13349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:10,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3452 states to 3452 states and 13349 transitions. [2021-06-12 20:49:10,768 INFO L78 Accepts]: Start accepts. Automaton has 3452 states and 13349 transitions. Word has length 24 [2021-06-12 20:49:10,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:10,768 INFO L482 AbstractCegarLoop]: Abstraction has 3452 states and 13349 transitions. [2021-06-12 20:49:10,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:10,768 INFO L276 IsEmpty]: Start isEmpty. Operand 3452 states and 13349 transitions. [2021-06-12 20:49:10,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:49:10,773 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:10,773 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:10,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable780,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:10,973 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:49:10,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:10,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1543268382, now seen corresponding path program 32 times [2021-06-12 20:49:10,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:10,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689581374] [2021-06-12 20:49:10,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:10,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:11,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:11,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:11,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689581374] [2021-06-12 20:49:11,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689581374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:11,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360765702] [2021-06-12 20:49:11,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:11,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:49:11,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:11,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:49:11,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:11,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:11,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:49:11,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:11,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:11,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:11,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:49:11,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:11,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360765702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:11,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:11,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:49:11,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855533715] [2021-06-12 20:49:11,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:49:11,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:11,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:49:11,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:49:11,359 INFO L87 Difference]: Start difference. First operand 3452 states and 13349 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:13,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:13,364 INFO L93 Difference]: Finished difference Result 4422 states and 16432 transitions. [2021-06-12 20:49:13,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 20:49:13,364 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:49:13,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:13,371 INFO L225 Difference]: With dead ends: 4422 [2021-06-12 20:49:13,371 INFO L226 Difference]: Without dead ends: 4411 [2021-06-12 20:49:13,372 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 1658.6ms TimeCoverageRelationStatistics Valid=556, Invalid=2866, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 20:49:13,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4411 states. [2021-06-12 20:49:13,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4411 to 3455. [2021-06-12 20:49:13,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3455 states, 3454 states have (on average 3.8679791546033586) internal successors, (13360), 3454 states have internal predecessors, (13360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:13,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3455 states to 3455 states and 13360 transitions. [2021-06-12 20:49:13,422 INFO L78 Accepts]: Start accepts. Automaton has 3455 states and 13360 transitions. Word has length 24 [2021-06-12 20:49:13,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:13,422 INFO L482 AbstractCegarLoop]: Abstraction has 3455 states and 13360 transitions. [2021-06-12 20:49:13,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:13,422 INFO L276 IsEmpty]: Start isEmpty. Operand 3455 states and 13360 transitions. [2021-06-12 20:49:13,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:49:13,426 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:13,426 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:13,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:13,627 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:49:13,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:13,627 INFO L82 PathProgramCache]: Analyzing trace with hash 142475740, now seen corresponding path program 33 times [2021-06-12 20:49:13,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:13,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494581210] [2021-06-12 20:49:13,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:13,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:13,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:13,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494581210] [2021-06-12 20:49:13,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494581210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:13,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885169377] [2021-06-12 20:49:13,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:13,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 20:49:13,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:13,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:49:13,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:13,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:13,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:49:13,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:13,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:13,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:13,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:49:14,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:14,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885169377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:14,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:14,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:49:14,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862389159] [2021-06-12 20:49:14,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:49:14,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:14,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:49:14,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:49:14,006 INFO L87 Difference]: Start difference. First operand 3455 states and 13360 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:15,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:15,533 INFO L93 Difference]: Finished difference Result 4282 states and 16027 transitions. [2021-06-12 20:49:15,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 20:49:15,534 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:49:15,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:15,540 INFO L225 Difference]: With dead ends: 4282 [2021-06-12 20:49:15,540 INFO L226 Difference]: Without dead ends: 4271 [2021-06-12 20:49:15,541 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1195.8ms TimeCoverageRelationStatistics Valid=378, Invalid=2172, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:49:15,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4271 states. [2021-06-12 20:49:15,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4271 to 3444. [2021-06-12 20:49:15,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3444 states, 3443 states have (on average 3.869009584664537) internal successors, (13321), 3443 states have internal predecessors, (13321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:15,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3444 states to 3444 states and 13321 transitions. [2021-06-12 20:49:15,587 INFO L78 Accepts]: Start accepts. Automaton has 3444 states and 13321 transitions. Word has length 24 [2021-06-12 20:49:15,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:15,587 INFO L482 AbstractCegarLoop]: Abstraction has 3444 states and 13321 transitions. [2021-06-12 20:49:15,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:15,587 INFO L276 IsEmpty]: Start isEmpty. Operand 3444 states and 13321 transitions. [2021-06-12 20:49:15,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:49:15,592 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:15,592 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:15,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable784 [2021-06-12 20:49:15,792 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:49:15,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:15,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1345253192, now seen corresponding path program 256 times [2021-06-12 20:49:15,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:15,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43431046] [2021-06-12 20:49:15,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:15,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:15,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43431046] [2021-06-12 20:49:15,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43431046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:15,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995336124] [2021-06-12 20:49:15,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:15,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:49:15,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:15,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:49:15,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:16,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-12 20:49:16,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:16,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:16,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:16,115 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-12 20:49:16,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:16,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995336124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:16,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:16,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-12 20:49:16,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355009702] [2021-06-12 20:49:16,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:49:16,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:16,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:49:16,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:49:16,132 INFO L87 Difference]: Start difference. First operand 3444 states and 13321 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:17,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:17,115 INFO L93 Difference]: Finished difference Result 3732 states and 14071 transitions. [2021-06-12 20:49:17,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:49:17,115 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:49:17,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:17,121 INFO L225 Difference]: With dead ends: 3732 [2021-06-12 20:49:17,121 INFO L226 Difference]: Without dead ends: 3648 [2021-06-12 20:49:17,121 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 682.7ms TimeCoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:49:17,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3648 states. [2021-06-12 20:49:17,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3648 to 3449. [2021-06-12 20:49:17,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3449 states, 3448 states have (on average 3.867169373549884) internal successors, (13334), 3448 states have internal predecessors, (13334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:17,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3449 states to 3449 states and 13334 transitions. [2021-06-12 20:49:17,167 INFO L78 Accepts]: Start accepts. Automaton has 3449 states and 13334 transitions. Word has length 24 [2021-06-12 20:49:17,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:17,167 INFO L482 AbstractCegarLoop]: Abstraction has 3449 states and 13334 transitions. [2021-06-12 20:49:17,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:17,167 INFO L276 IsEmpty]: Start isEmpty. Operand 3449 states and 13334 transitions. [2021-06-12 20:49:17,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:49:17,171 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:17,171 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:17,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable786,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:17,372 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:49:17,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:17,372 INFO L82 PathProgramCache]: Analyzing trace with hash -80955710, now seen corresponding path program 257 times [2021-06-12 20:49:17,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:17,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248811357] [2021-06-12 20:49:17,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:17,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:17,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:17,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248811357] [2021-06-12 20:49:17,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248811357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:17,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985286650] [2021-06-12 20:49:17,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:17,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:49:17,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:17,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:49:17,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:17,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-12 20:49:17,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:17,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:17,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:17,678 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-12 20:49:17,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:17,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985286650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:17,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:17,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-12 20:49:17,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815524468] [2021-06-12 20:49:17,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:49:17,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:17,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:49:17,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:49:17,695 INFO L87 Difference]: Start difference. First operand 3449 states and 13334 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:18,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:18,666 INFO L93 Difference]: Finished difference Result 3731 states and 14034 transitions. [2021-06-12 20:49:18,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:49:18,667 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:49:18,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:18,672 INFO L225 Difference]: With dead ends: 3731 [2021-06-12 20:49:18,672 INFO L226 Difference]: Without dead ends: 3654 [2021-06-12 20:49:18,673 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 678.3ms TimeCoverageRelationStatistics Valid=141, Invalid=1119, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:49:18,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3654 states. [2021-06-12 20:49:18,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3654 to 3452. [2021-06-12 20:49:18,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3452 states, 3451 states have (on average 3.8658359895682413) internal successors, (13341), 3451 states have internal predecessors, (13341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:18,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3452 states to 3452 states and 13341 transitions. [2021-06-12 20:49:18,717 INFO L78 Accepts]: Start accepts. Automaton has 3452 states and 13341 transitions. Word has length 24 [2021-06-12 20:49:18,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:18,717 INFO L482 AbstractCegarLoop]: Abstraction has 3452 states and 13341 transitions. [2021-06-12 20:49:18,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:18,717 INFO L276 IsEmpty]: Start isEmpty. Operand 3452 states and 13341 transitions. [2021-06-12 20:49:18,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:49:18,721 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:18,721 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:18,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable787,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:18,922 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:49:18,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:18,922 INFO L82 PathProgramCache]: Analyzing trace with hash -257497142, now seen corresponding path program 258 times [2021-06-12 20:49:18,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:18,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929750590] [2021-06-12 20:49:18,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:18,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:19,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:19,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:19,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929750590] [2021-06-12 20:49:19,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929750590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:19,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622764676] [2021-06-12 20:49:19,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:19,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:49:19,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:19,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:49:19,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:19,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:19,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 32 [2021-06-12 20:49:19,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:19,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:19,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:19,212 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:29 [2021-06-12 20:49:19,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:19,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622764676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:19,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:19,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:49:19,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974947081] [2021-06-12 20:49:19,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:49:19,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:19,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:49:19,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:49:19,321 INFO L87 Difference]: Start difference. First operand 3452 states and 13341 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:20,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:20,383 INFO L93 Difference]: Finished difference Result 3630 states and 13842 transitions. [2021-06-12 20:49:20,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:49:20,383 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:49:20,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:20,388 INFO L225 Difference]: With dead ends: 3630 [2021-06-12 20:49:20,389 INFO L226 Difference]: Without dead ends: 3585 [2021-06-12 20:49:20,389 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 801.0ms TimeCoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:49:20,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3585 states. [2021-06-12 20:49:20,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3585 to 3452. [2021-06-12 20:49:20,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3452 states, 3451 states have (on average 3.8658359895682413) internal successors, (13341), 3451 states have internal predecessors, (13341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:20,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3452 states to 3452 states and 13341 transitions. [2021-06-12 20:49:20,433 INFO L78 Accepts]: Start accepts. Automaton has 3452 states and 13341 transitions. Word has length 24 [2021-06-12 20:49:20,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:20,433 INFO L482 AbstractCegarLoop]: Abstraction has 3452 states and 13341 transitions. [2021-06-12 20:49:20,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:20,433 INFO L276 IsEmpty]: Start isEmpty. Operand 3452 states and 13341 transitions. [2021-06-12 20:49:20,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:49:20,438 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:20,438 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:20,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable788 [2021-06-12 20:49:20,638 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:49:20,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:20,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1091235582, now seen corresponding path program 259 times [2021-06-12 20:49:20,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:20,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429680931] [2021-06-12 20:49:20,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:20,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:20,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:20,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:20,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429680931] [2021-06-12 20:49:20,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429680931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:20,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572131724] [2021-06-12 20:49:20,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:20,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:20,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:49:20,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:20,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 20:49:20,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:20,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:20,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:20,934 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:10 [2021-06-12 20:49:20,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:20,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572131724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:20,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:20,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-12 20:49:20,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507814329] [2021-06-12 20:49:20,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:49:20,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:20,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:49:20,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:49:20,957 INFO L87 Difference]: Start difference. First operand 3452 states and 13341 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:21,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:21,559 INFO L93 Difference]: Finished difference Result 3580 states and 13695 transitions. [2021-06-12 20:49:21,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:49:21,560 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:49:21,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:21,565 INFO L225 Difference]: With dead ends: 3580 [2021-06-12 20:49:21,565 INFO L226 Difference]: Without dead ends: 3541 [2021-06-12 20:49:21,565 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 470.9ms TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:49:21,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3541 states. [2021-06-12 20:49:21,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3541 to 3450. [2021-06-12 20:49:21,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3450 states, 3449 states have (on average 3.8669179472310815) internal successors, (13337), 3449 states have internal predecessors, (13337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:21,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3450 states to 3450 states and 13337 transitions. [2021-06-12 20:49:21,608 INFO L78 Accepts]: Start accepts. Automaton has 3450 states and 13337 transitions. Word has length 24 [2021-06-12 20:49:21,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:21,608 INFO L482 AbstractCegarLoop]: Abstraction has 3450 states and 13337 transitions. [2021-06-12 20:49:21,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:21,608 INFO L276 IsEmpty]: Start isEmpty. Operand 3450 states and 13337 transitions. [2021-06-12 20:49:21,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:49:21,612 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:21,612 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:21,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable792,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:21,813 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:49:21,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:21,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1382111726, now seen corresponding path program 34 times [2021-06-12 20:49:21,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:21,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642671845] [2021-06-12 20:49:21,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:21,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:21,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:21,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:21,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642671845] [2021-06-12 20:49:21,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642671845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:21,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003840637] [2021-06-12 20:49:21,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:22,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:49:22,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:22,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:49:22,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:22,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-12 20:49:22,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:22,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:22,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:22,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-12 20:49:22,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:22,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003840637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:22,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:22,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-12 20:49:22,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575452084] [2021-06-12 20:49:22,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:49:22,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:22,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:49:22,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:49:22,182 INFO L87 Difference]: Start difference. First operand 3450 states and 13337 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:23,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:23,552 INFO L93 Difference]: Finished difference Result 3746 states and 14106 transitions. [2021-06-12 20:49:23,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:49:23,552 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:49:23,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:23,557 INFO L225 Difference]: With dead ends: 3746 [2021-06-12 20:49:23,557 INFO L226 Difference]: Without dead ends: 3666 [2021-06-12 20:49:23,557 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1101.6ms TimeCoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:49:23,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3666 states. [2021-06-12 20:49:23,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3666 to 3454. [2021-06-12 20:49:23,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3454 states, 3453 states have (on average 3.8662033014769763) internal successors, (13350), 3453 states have internal predecessors, (13350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:23,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3454 states to 3454 states and 13350 transitions. [2021-06-12 20:49:23,599 INFO L78 Accepts]: Start accepts. Automaton has 3454 states and 13350 transitions. Word has length 24 [2021-06-12 20:49:23,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:23,599 INFO L482 AbstractCegarLoop]: Abstraction has 3454 states and 13350 transitions. [2021-06-12 20:49:23,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:23,599 INFO L276 IsEmpty]: Start isEmpty. Operand 3454 states and 13350 transitions. [2021-06-12 20:49:23,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:49:23,603 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:23,603 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:23,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable793 [2021-06-12 20:49:23,803 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:49:23,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:23,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1184183824, now seen corresponding path program 35 times [2021-06-12 20:49:23,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:23,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039442010] [2021-06-12 20:49:23,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:23,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:23,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039442010] [2021-06-12 20:49:23,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039442010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:23,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887615181] [2021-06-12 20:49:23,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:23,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:49:23,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:23,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:49:23,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:24,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-12 20:49:24,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:24,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:24,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:24,130 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-12 20:49:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:24,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887615181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:24,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:24,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-12 20:49:24,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090635541] [2021-06-12 20:49:24,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:49:24,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:24,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:49:24,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:49:24,147 INFO L87 Difference]: Start difference. First operand 3454 states and 13350 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:25,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:25,513 INFO L93 Difference]: Finished difference Result 3757 states and 14125 transitions. [2021-06-12 20:49:25,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:49:25,513 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:49:25,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:25,519 INFO L225 Difference]: With dead ends: 3757 [2021-06-12 20:49:25,519 INFO L226 Difference]: Without dead ends: 3676 [2021-06-12 20:49:25,520 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1105.9ms TimeCoverageRelationStatistics Valid=198, Invalid=1284, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:49:25,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3676 states. [2021-06-12 20:49:25,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3676 to 3459. [2021-06-12 20:49:25,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3459 states, 3458 states have (on average 3.8646616541353382) internal successors, (13364), 3458 states have internal predecessors, (13364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:25,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3459 states to 3459 states and 13364 transitions. [2021-06-12 20:49:25,570 INFO L78 Accepts]: Start accepts. Automaton has 3459 states and 13364 transitions. Word has length 24 [2021-06-12 20:49:25,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:25,571 INFO L482 AbstractCegarLoop]: Abstraction has 3459 states and 13364 transitions. [2021-06-12 20:49:25,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:25,571 INFO L276 IsEmpty]: Start isEmpty. Operand 3459 states and 13364 transitions. [2021-06-12 20:49:25,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:49:25,575 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:25,576 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:25,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable794 [2021-06-12 20:49:25,776 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:49:25,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:25,776 INFO L82 PathProgramCache]: Analyzing trace with hash 2082633612, now seen corresponding path program 36 times [2021-06-12 20:49:25,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:25,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127801532] [2021-06-12 20:49:25,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:25,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:25,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:25,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:25,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127801532] [2021-06-12 20:49:25,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127801532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:25,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071872316] [2021-06-12 20:49:25,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:25,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:49:25,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:25,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:49:25,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:26,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 20:49:26,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:26,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:26,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:26,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:10 [2021-06-12 20:49:26,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:26,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071872316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:26,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:26,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-12 20:49:26,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38148487] [2021-06-12 20:49:26,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:49:26,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:26,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:49:26,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:49:26,070 INFO L87 Difference]: Start difference. First operand 3459 states and 13364 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:27,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:27,138 INFO L93 Difference]: Finished difference Result 3665 states and 13899 transitions. [2021-06-12 20:49:27,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:49:27,138 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:49:27,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:27,144 INFO L225 Difference]: With dead ends: 3665 [2021-06-12 20:49:27,144 INFO L226 Difference]: Without dead ends: 3625 [2021-06-12 20:49:27,144 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 810.9ms TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:49:27,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3625 states. [2021-06-12 20:49:27,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3625 to 3462. [2021-06-12 20:49:27,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3462 states, 3461 states have (on average 3.863623230280266) internal successors, (13372), 3461 states have internal predecessors, (13372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:27,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3462 states to 3462 states and 13372 transitions. [2021-06-12 20:49:27,195 INFO L78 Accepts]: Start accepts. Automaton has 3462 states and 13372 transitions. Word has length 24 [2021-06-12 20:49:27,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:27,195 INFO L482 AbstractCegarLoop]: Abstraction has 3462 states and 13372 transitions. [2021-06-12 20:49:27,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:27,195 INFO L276 IsEmpty]: Start isEmpty. Operand 3462 states and 13372 transitions. [2021-06-12 20:49:27,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:49:27,200 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:27,200 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:27,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable795,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:27,400 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:49:27,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:27,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1888747506, now seen corresponding path program 37 times [2021-06-12 20:49:27,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:27,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179594833] [2021-06-12 20:49:27,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:27,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:27,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:27,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:27,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179594833] [2021-06-12 20:49:27,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179594833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:27,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247455767] [2021-06-12 20:49:27,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:27,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:27,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:49:27,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:27,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 20:49:27,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:27,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:27,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:27,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:10 [2021-06-12 20:49:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:27,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247455767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:27,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:27,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-12 20:49:27,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686237426] [2021-06-12 20:49:27,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:49:27,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:27,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:49:27,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:49:27,713 INFO L87 Difference]: Start difference. First operand 3462 states and 13372 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:28,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:28,815 INFO L93 Difference]: Finished difference Result 3654 states and 13867 transitions. [2021-06-12 20:49:28,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:49:28,815 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:49:28,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:28,821 INFO L225 Difference]: With dead ends: 3654 [2021-06-12 20:49:28,821 INFO L226 Difference]: Without dead ends: 3612 [2021-06-12 20:49:28,821 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 881.1ms TimeCoverageRelationStatistics Valid=157, Invalid=1103, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:49:28,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3612 states. [2021-06-12 20:49:28,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3612 to 3453. [2021-06-12 20:49:28,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3453 states, 3452 states have (on average 3.8670336037079953) internal successors, (13349), 3452 states have internal predecessors, (13349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:28,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3453 states to 3453 states and 13349 transitions. [2021-06-12 20:49:28,868 INFO L78 Accepts]: Start accepts. Automaton has 3453 states and 13349 transitions. Word has length 24 [2021-06-12 20:49:28,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:28,868 INFO L482 AbstractCegarLoop]: Abstraction has 3453 states and 13349 transitions. [2021-06-12 20:49:28,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:28,868 INFO L276 IsEmpty]: Start isEmpty. Operand 3453 states and 13349 transitions. [2021-06-12 20:49:28,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:49:28,873 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:28,873 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:29,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable796 [2021-06-12 20:49:29,073 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:49:29,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:29,074 INFO L82 PathProgramCache]: Analyzing trace with hash -597575396, now seen corresponding path program 260 times [2021-06-12 20:49:29,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:29,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539324694] [2021-06-12 20:49:29,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:29,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:29,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:29,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:29,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539324694] [2021-06-12 20:49:29,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539324694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:29,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239142192] [2021-06-12 20:49:29,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:29,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:49:29,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:29,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:49:29,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:29,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:29,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:29,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-12 20:49:29,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:29,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:29,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:29,421 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-12 20:49:29,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:29,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239142192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:29,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:29,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 20 [2021-06-12 20:49:29,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173904470] [2021-06-12 20:49:29,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:49:29,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:29,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:49:29,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:49:29,438 INFO L87 Difference]: Start difference. First operand 3453 states and 13349 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:31,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:31,001 INFO L93 Difference]: Finished difference Result 3992 states and 14802 transitions. [2021-06-12 20:49:31,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 20:49:31,001 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:49:31,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:31,007 INFO L225 Difference]: With dead ends: 3992 [2021-06-12 20:49:31,008 INFO L226 Difference]: Without dead ends: 3917 [2021-06-12 20:49:31,008 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 1167.0ms TimeCoverageRelationStatistics Valid=353, Invalid=2617, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 20:49:31,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3917 states. [2021-06-12 20:49:31,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3917 to 3547. [2021-06-12 20:49:31,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3547 states, 3546 states have (on average 3.8705583756345177) internal successors, (13725), 3546 states have internal predecessors, (13725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:31,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3547 states to 3547 states and 13725 transitions. [2021-06-12 20:49:31,058 INFO L78 Accepts]: Start accepts. Automaton has 3547 states and 13725 transitions. Word has length 24 [2021-06-12 20:49:31,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:31,058 INFO L482 AbstractCegarLoop]: Abstraction has 3547 states and 13725 transitions. [2021-06-12 20:49:31,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:31,058 INFO L276 IsEmpty]: Start isEmpty. Operand 3547 states and 13725 transitions. [2021-06-12 20:49:31,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:49:31,063 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:31,063 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:31,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable797,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:31,264 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:49:31,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:31,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1421943676, now seen corresponding path program 261 times [2021-06-12 20:49:31,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:31,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46667986] [2021-06-12 20:49:31,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:31,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:31,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:31,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46667986] [2021-06-12 20:49:31,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46667986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:31,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28782292] [2021-06-12 20:49:31,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:31,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:49:31,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:31,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:49:31,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:31,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:31,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-06-12 20:49:31,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:31,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:31,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:31,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2021-06-12 20:49:31,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:31,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28782292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:31,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:31,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:49:31,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213592192] [2021-06-12 20:49:31,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:49:31,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:31,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:49:31,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:49:31,645 INFO L87 Difference]: Start difference. First operand 3547 states and 13725 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:33,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:33,156 INFO L93 Difference]: Finished difference Result 3934 states and 14730 transitions. [2021-06-12 20:49:33,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:49:33,157 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:49:33,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:33,163 INFO L225 Difference]: With dead ends: 3934 [2021-06-12 20:49:33,163 INFO L226 Difference]: Without dead ends: 3879 [2021-06-12 20:49:33,164 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1068.0ms TimeCoverageRelationStatistics Valid=293, Invalid=2157, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:49:33,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3879 states. [2021-06-12 20:49:33,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3879 to 3552. [2021-06-12 20:49:33,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3552 states, 3551 states have (on average 3.8642635877217684) internal successors, (13722), 3551 states have internal predecessors, (13722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:33,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3552 states to 3552 states and 13722 transitions. [2021-06-12 20:49:33,215 INFO L78 Accepts]: Start accepts. Automaton has 3552 states and 13722 transitions. Word has length 24 [2021-06-12 20:49:33,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:33,215 INFO L482 AbstractCegarLoop]: Abstraction has 3552 states and 13722 transitions. [2021-06-12 20:49:33,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:33,215 INFO L276 IsEmpty]: Start isEmpty. Operand 3552 states and 13722 transitions. [2021-06-12 20:49:33,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:49:33,220 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:33,220 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:33,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable798,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:33,420 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:49:33,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:33,420 INFO L82 PathProgramCache]: Analyzing trace with hash -380150510, now seen corresponding path program 262 times [2021-06-12 20:49:33,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:33,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548407563] [2021-06-12 20:49:33,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:33,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:33,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:33,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:33,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548407563] [2021-06-12 20:49:33,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548407563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:33,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641353426] [2021-06-12 20:49:33,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:33,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:49:33,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:33,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:49:33,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:33,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 20:49:33,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:33,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:33,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:33,713 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:10 [2021-06-12 20:49:33,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:33,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641353426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:33,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:33,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-12 20:49:33,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680732855] [2021-06-12 20:49:33,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:49:33,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:33,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:49:33,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:49:33,737 INFO L87 Difference]: Start difference. First operand 3552 states and 13722 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:34,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:34,730 INFO L93 Difference]: Finished difference Result 3730 states and 14250 transitions. [2021-06-12 20:49:34,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:49:34,730 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:49:34,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:34,736 INFO L225 Difference]: With dead ends: 3730 [2021-06-12 20:49:34,736 INFO L226 Difference]: Without dead ends: 3704 [2021-06-12 20:49:34,737 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 751.4ms TimeCoverageRelationStatistics Valid=189, Invalid=1217, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:49:34,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3704 states. [2021-06-12 20:49:34,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3704 to 3564. [2021-06-12 20:49:34,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3564 states, 3563 states have (on average 3.8635980914959305) internal successors, (13766), 3563 states have internal predecessors, (13766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:34,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3564 states to 3564 states and 13766 transitions. [2021-06-12 20:49:34,785 INFO L78 Accepts]: Start accepts. Automaton has 3564 states and 13766 transitions. Word has length 24 [2021-06-12 20:49:34,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:34,786 INFO L482 AbstractCegarLoop]: Abstraction has 3564 states and 13766 transitions. [2021-06-12 20:49:34,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:34,786 INFO L276 IsEmpty]: Start isEmpty. Operand 3564 states and 13766 transitions. [2021-06-12 20:49:34,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:49:34,790 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:34,790 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:34,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable802 [2021-06-12 20:49:34,991 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:49:34,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:34,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1213888950, now seen corresponding path program 263 times [2021-06-12 20:49:34,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:34,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422224450] [2021-06-12 20:49:34,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:34,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:35,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:35,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:35,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422224450] [2021-06-12 20:49:35,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422224450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:35,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970117469] [2021-06-12 20:49:35,158 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:35,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:49:35,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:35,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:49:35,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:35,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 20:49:35,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:35,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:35,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:35,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:10 [2021-06-12 20:49:35,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:35,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970117469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:35,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:35,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-12 20:49:35,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914631318] [2021-06-12 20:49:35,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:49:35,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:35,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:49:35,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:49:35,305 INFO L87 Difference]: Start difference. First operand 3564 states and 13766 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:36,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:36,468 INFO L93 Difference]: Finished difference Result 3752 states and 14293 transitions. [2021-06-12 20:49:36,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:49:36,468 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:49:36,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:36,475 INFO L225 Difference]: With dead ends: 3752 [2021-06-12 20:49:36,475 INFO L226 Difference]: Without dead ends: 3729 [2021-06-12 20:49:36,475 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 858.1ms TimeCoverageRelationStatistics Valid=208, Invalid=1432, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:49:36,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3729 states. [2021-06-12 20:49:36,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3729 to 3571. [2021-06-12 20:49:36,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3571 states, 3570 states have (on average 3.861624649859944) internal successors, (13786), 3570 states have internal predecessors, (13786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:36,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 13786 transitions. [2021-06-12 20:49:36,529 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 13786 transitions. Word has length 24 [2021-06-12 20:49:36,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:36,529 INFO L482 AbstractCegarLoop]: Abstraction has 3571 states and 13786 transitions. [2021-06-12 20:49:36,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:36,529 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 13786 transitions. [2021-06-12 20:49:36,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:49:36,534 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:36,534 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:36,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable803,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:36,734 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:49:36,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:36,735 INFO L82 PathProgramCache]: Analyzing trace with hash 44593446, now seen corresponding path program 38 times [2021-06-12 20:49:36,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:36,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175049690] [2021-06-12 20:49:36,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:36,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:36,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:36,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175049690] [2021-06-12 20:49:36,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175049690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:36,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686411913] [2021-06-12 20:49:36,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:36,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:49:36,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:36,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:49:36,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:37,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:37,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:37,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-12 20:49:37,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:37,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:37,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:37,126 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-12 20:49:37,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:37,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686411913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:37,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:37,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 20 [2021-06-12 20:49:37,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875607141] [2021-06-12 20:49:37,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:49:37,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:37,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:49:37,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:49:37,143 INFO L87 Difference]: Start difference. First operand 3571 states and 13786 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:38,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:38,886 INFO L93 Difference]: Finished difference Result 3868 states and 14553 transitions. [2021-06-12 20:49:38,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 20:49:38,887 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:49:38,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:38,893 INFO L225 Difference]: With dead ends: 3868 [2021-06-12 20:49:38,893 INFO L226 Difference]: Without dead ends: 3816 [2021-06-12 20:49:38,894 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1349.9ms TimeCoverageRelationStatistics Valid=328, Invalid=2222, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:49:38,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3816 states. [2021-06-12 20:49:38,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3816 to 3583. [2021-06-12 20:49:38,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3583 states, 3582 states have (on average 3.8615298715801227) internal successors, (13832), 3582 states have internal predecessors, (13832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:38,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3583 states to 3583 states and 13832 transitions. [2021-06-12 20:49:38,949 INFO L78 Accepts]: Start accepts. Automaton has 3583 states and 13832 transitions. Word has length 24 [2021-06-12 20:49:38,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:38,949 INFO L482 AbstractCegarLoop]: Abstraction has 3583 states and 13832 transitions. [2021-06-12 20:49:38,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:38,949 INFO L276 IsEmpty]: Start isEmpty. Operand 3583 states and 13832 transitions. [2021-06-12 20:49:38,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:49:38,954 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:38,954 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:39,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable804 [2021-06-12 20:49:39,154 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:49:39,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:39,155 INFO L82 PathProgramCache]: Analyzing trace with hash -983556414, now seen corresponding path program 39 times [2021-06-12 20:49:39,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:39,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74448344] [2021-06-12 20:49:39,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:39,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:39,299 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:39,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:39,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74448344] [2021-06-12 20:49:39,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74448344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:39,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012950459] [2021-06-12 20:49:39,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:39,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:49:39,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:39,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:49:39,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:39,466 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:39,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 32 [2021-06-12 20:49:39,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:39,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:39,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:39,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:29 [2021-06-12 20:49:39,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:39,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012950459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:39,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:39,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-12 20:49:39,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241682392] [2021-06-12 20:49:39,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:49:39,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:39,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:49:39,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:49:39,583 INFO L87 Difference]: Start difference. First operand 3583 states and 13832 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:41,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:41,117 INFO L93 Difference]: Finished difference Result 3811 states and 14413 transitions. [2021-06-12 20:49:41,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:49:41,117 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:49:41,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:41,123 INFO L225 Difference]: With dead ends: 3811 [2021-06-12 20:49:41,124 INFO L226 Difference]: Without dead ends: 3757 [2021-06-12 20:49:41,124 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1233.7ms TimeCoverageRelationStatistics Valid=279, Invalid=2073, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 20:49:41,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3757 states. [2021-06-12 20:49:41,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3757 to 3592. [2021-06-12 20:49:41,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3592 states, 3591 states have (on average 3.8596491228070176) internal successors, (13860), 3591 states have internal predecessors, (13860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:41,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3592 states to 3592 states and 13860 transitions. [2021-06-12 20:49:41,173 INFO L78 Accepts]: Start accepts. Automaton has 3592 states and 13860 transitions. Word has length 24 [2021-06-12 20:49:41,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:41,173 INFO L482 AbstractCegarLoop]: Abstraction has 3592 states and 13860 transitions. [2021-06-12 20:49:41,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:41,173 INFO L276 IsEmpty]: Start isEmpty. Operand 3592 states and 13860 transitions. [2021-06-12 20:49:41,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:49:41,178 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:41,178 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:41,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable805,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:41,378 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:49:41,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:41,378 INFO L82 PathProgramCache]: Analyzing trace with hash -659970236, now seen corresponding path program 40 times [2021-06-12 20:49:41,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:41,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124329612] [2021-06-12 20:49:41,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:41,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:41,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:41,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124329612] [2021-06-12 20:49:41,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124329612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:41,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458369488] [2021-06-12 20:49:41,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:41,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:49:41,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:41,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:49:41,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:41,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 20:49:41,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:41,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:41,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:41,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:10 [2021-06-12 20:49:41,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:41,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458369488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:41,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:41,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-12 20:49:41,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180773483] [2021-06-12 20:49:41,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:49:41,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:41,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:49:41,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:49:41,664 INFO L87 Difference]: Start difference. First operand 3592 states and 13860 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:43,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:43,110 INFO L93 Difference]: Finished difference Result 3849 states and 14541 transitions. [2021-06-12 20:49:43,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 20:49:43,110 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:49:43,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:43,116 INFO L225 Difference]: With dead ends: 3849 [2021-06-12 20:49:43,116 INFO L226 Difference]: Without dead ends: 3822 [2021-06-12 20:49:43,117 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1119.8ms TimeCoverageRelationStatistics Valid=303, Invalid=2247, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:49:43,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2021-06-12 20:49:43,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 3599. [2021-06-12 20:49:43,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3599 states, 3598 states have (on average 3.859922178988327) internal successors, (13888), 3598 states have internal predecessors, (13888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:43,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3599 states to 3599 states and 13888 transitions. [2021-06-12 20:49:43,168 INFO L78 Accepts]: Start accepts. Automaton has 3599 states and 13888 transitions. Word has length 24 [2021-06-12 20:49:43,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:43,168 INFO L482 AbstractCegarLoop]: Abstraction has 3599 states and 13888 transitions. [2021-06-12 20:49:43,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:43,168 INFO L276 IsEmpty]: Start isEmpty. Operand 3599 states and 13888 transitions. [2021-06-12 20:49:43,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:49:43,173 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:43,173 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:43,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable810 [2021-06-12 20:49:43,373 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:49:43,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:43,373 INFO L82 PathProgramCache]: Analyzing trace with hash -974941220, now seen corresponding path program 41 times [2021-06-12 20:49:43,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:43,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568304346] [2021-06-12 20:49:43,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:43,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:43,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:43,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:43,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568304346] [2021-06-12 20:49:43,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568304346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:43,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448045676] [2021-06-12 20:49:43,522 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:43,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:49:43,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:43,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:49:43,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:43,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-12 20:49:43,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:43,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:43,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:43,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-12 20:49:43,679 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:43,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448045676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:43,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:43,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-06-12 20:49:43,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952087242] [2021-06-12 20:49:43,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:49:43,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:43,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:49:43,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:49:43,679 INFO L87 Difference]: Start difference. First operand 3599 states and 13888 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:44,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:44,872 INFO L93 Difference]: Finished difference Result 3985 states and 15021 transitions. [2021-06-12 20:49:44,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 20:49:44,872 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:49:44,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:44,879 INFO L225 Difference]: With dead ends: 3985 [2021-06-12 20:49:44,879 INFO L226 Difference]: Without dead ends: 3959 [2021-06-12 20:49:44,879 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 919.3ms TimeCoverageRelationStatistics Valid=344, Invalid=1726, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:49:44,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3959 states. [2021-06-12 20:49:44,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3959 to 3669. [2021-06-12 20:49:44,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3669 states, 3668 states have (on average 3.8625954198473282) internal successors, (14168), 3668 states have internal predecessors, (14168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:44,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3669 states to 3669 states and 14168 transitions. [2021-06-12 20:49:44,933 INFO L78 Accepts]: Start accepts. Automaton has 3669 states and 14168 transitions. Word has length 24 [2021-06-12 20:49:44,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:44,933 INFO L482 AbstractCegarLoop]: Abstraction has 3669 states and 14168 transitions. [2021-06-12 20:49:44,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:44,933 INFO L276 IsEmpty]: Start isEmpty. Operand 3669 states and 14168 transitions. [2021-06-12 20:49:44,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:49:44,938 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:44,938 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:45,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable811 [2021-06-12 20:49:45,138 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:49:45,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:45,139 INFO L82 PathProgramCache]: Analyzing trace with hash -234349534, now seen corresponding path program 42 times [2021-06-12 20:49:45,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:45,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984131667] [2021-06-12 20:49:45,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:45,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:45,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:45,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:45,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984131667] [2021-06-12 20:49:45,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984131667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:45,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166536056] [2021-06-12 20:49:45,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:45,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:49:45,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:45,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:49:45,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:45,413 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:45,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 32 [2021-06-12 20:49:45,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:45,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:45,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:45,424 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:29 [2021-06-12 20:49:45,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:45,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166536056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:45,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:45,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:49:45,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743769633] [2021-06-12 20:49:45,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:49:45,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:45,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:49:45,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:49:45,531 INFO L87 Difference]: Start difference. First operand 3669 states and 14168 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:46,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:46,867 INFO L93 Difference]: Finished difference Result 3868 states and 14708 transitions. [2021-06-12 20:49:46,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:49:46,867 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:49:46,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:46,874 INFO L225 Difference]: With dead ends: 3868 [2021-06-12 20:49:46,874 INFO L226 Difference]: Without dead ends: 3827 [2021-06-12 20:49:46,874 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1103.9ms TimeCoverageRelationStatistics Valid=273, Invalid=1797, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:49:46,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3827 states. [2021-06-12 20:49:46,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3827 to 3676. [2021-06-12 20:49:46,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3676 states, 3675 states have (on average 3.859863945578231) internal successors, (14185), 3675 states have internal predecessors, (14185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:46,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3676 states to 3676 states and 14185 transitions. [2021-06-12 20:49:46,921 INFO L78 Accepts]: Start accepts. Automaton has 3676 states and 14185 transitions. Word has length 24 [2021-06-12 20:49:46,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:46,921 INFO L482 AbstractCegarLoop]: Abstraction has 3676 states and 14185 transitions. [2021-06-12 20:49:46,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:46,921 INFO L276 IsEmpty]: Start isEmpty. Operand 3676 states and 14185 transitions. [2021-06-12 20:49:46,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:49:46,926 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:46,926 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:47,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable812,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:47,126 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:49:47,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:47,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1484751672, now seen corresponding path program 264 times [2021-06-12 20:49:47,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:47,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378703964] [2021-06-12 20:49:47,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:47,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:47,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:47,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378703964] [2021-06-12 20:49:47,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378703964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:47,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041408600] [2021-06-12 20:49:47,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:47,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:49:47,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:47,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:49:47,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:47,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:47,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 32 [2021-06-12 20:49:47,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:47,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:47,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:47,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:29 [2021-06-12 20:49:47,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:47,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041408600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:47,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:47,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:49:47,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340083103] [2021-06-12 20:49:47,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:49:47,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:47,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:49:47,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:49:47,522 INFO L87 Difference]: Start difference. First operand 3676 states and 14185 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:49,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:49,051 INFO L93 Difference]: Finished difference Result 3954 states and 14929 transitions. [2021-06-12 20:49:49,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:49:49,051 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:49:49,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:49,058 INFO L225 Difference]: With dead ends: 3954 [2021-06-12 20:49:49,058 INFO L226 Difference]: Without dead ends: 3908 [2021-06-12 20:49:49,058 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1185.7ms TimeCoverageRelationStatistics Valid=282, Invalid=2070, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 20:49:49,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3908 states. [2021-06-12 20:49:49,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3908 to 3697. [2021-06-12 20:49:49,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3697 states, 3696 states have (on average 3.856060606060606) internal successors, (14252), 3696 states have internal predecessors, (14252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:49,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3697 states to 3697 states and 14252 transitions. [2021-06-12 20:49:49,109 INFO L78 Accepts]: Start accepts. Automaton has 3697 states and 14252 transitions. Word has length 24 [2021-06-12 20:49:49,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:49,110 INFO L482 AbstractCegarLoop]: Abstraction has 3697 states and 14252 transitions. [2021-06-12 20:49:49,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:49,110 INFO L276 IsEmpty]: Start isEmpty. Operand 3697 states and 14252 transitions. [2021-06-12 20:49:49,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:49:49,114 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:49,114 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:49,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable816,412 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:49,315 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:49:49,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:49,315 INFO L82 PathProgramCache]: Analyzing trace with hash -306109502, now seen corresponding path program 265 times [2021-06-12 20:49:49,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:49,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938824893] [2021-06-12 20:49:49,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:49,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:49,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:49,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:49,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938824893] [2021-06-12 20:49:49,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938824893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:49,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262006013] [2021-06-12 20:49:49,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:49,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:49:49,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:49,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 20:49:49,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:49,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:49,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:49,595 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:10 [2021-06-12 20:49:49,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:49,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262006013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:49,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:49,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-12 20:49:49,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890741629] [2021-06-12 20:49:49,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:49:49,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:49,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:49:49,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:49:49,618 INFO L87 Difference]: Start difference. First operand 3697 states and 14252 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:50,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:50,311 INFO L93 Difference]: Finished difference Result 3861 states and 14710 transitions. [2021-06-12 20:49:50,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:49:50,312 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:49:50,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:50,319 INFO L225 Difference]: With dead ends: 3861 [2021-06-12 20:49:50,319 INFO L226 Difference]: Without dead ends: 3851 [2021-06-12 20:49:50,319 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 583.3ms TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:49:50,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3851 states. [2021-06-12 20:49:50,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3851 to 3699. [2021-06-12 20:49:50,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3699 states, 3698 states have (on average 3.855868036776636) internal successors, (14259), 3698 states have internal predecessors, (14259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:50,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3699 states to 3699 states and 14259 transitions. [2021-06-12 20:49:50,370 INFO L78 Accepts]: Start accepts. Automaton has 3699 states and 14259 transitions. Word has length 24 [2021-06-12 20:49:50,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:50,370 INFO L482 AbstractCegarLoop]: Abstraction has 3699 states and 14259 transitions. [2021-06-12 20:49:50,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:50,370 INFO L276 IsEmpty]: Start isEmpty. Operand 3699 states and 14259 transitions. [2021-06-12 20:49:50,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:49:50,375 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:50,375 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:50,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable820,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:50,576 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:49:50,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:50,576 INFO L82 PathProgramCache]: Analyzing trace with hash -572743186, now seen corresponding path program 43 times [2021-06-12 20:49:50,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:50,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555540899] [2021-06-12 20:49:50,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:50,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:50,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:50,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:50,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555540899] [2021-06-12 20:49:50,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555540899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:50,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445908319] [2021-06-12 20:49:50,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:50,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:49:50,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:50,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 20:49:50,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:50,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:50,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:50,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:10 [2021-06-12 20:49:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:50,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445908319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:50,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:50,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-12 20:49:50,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049569832] [2021-06-12 20:49:50,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:49:50,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:50,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:49:50,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:49:50,871 INFO L87 Difference]: Start difference. First operand 3699 states and 14259 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:51,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:51,517 INFO L93 Difference]: Finished difference Result 3833 states and 14656 transitions. [2021-06-12 20:49:51,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:49:51,517 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:49:51,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:51,524 INFO L225 Difference]: With dead ends: 3833 [2021-06-12 20:49:51,524 INFO L226 Difference]: Without dead ends: 3824 [2021-06-12 20:49:51,524 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 504.9ms TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:49:51,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3824 states. [2021-06-12 20:49:51,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3824 to 3704. [2021-06-12 20:49:51,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3704 states, 3703 states have (on average 3.857142857142857) internal successors, (14283), 3703 states have internal predecessors, (14283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:51,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3704 states to 3704 states and 14283 transitions. [2021-06-12 20:49:51,588 INFO L78 Accepts]: Start accepts. Automaton has 3704 states and 14283 transitions. Word has length 24 [2021-06-12 20:49:51,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:51,588 INFO L482 AbstractCegarLoop]: Abstraction has 3704 states and 14283 transitions. [2021-06-12 20:49:51,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:51,588 INFO L276 IsEmpty]: Start isEmpty. Operand 3704 states and 14283 transitions. [2021-06-12 20:49:51,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:49:51,593 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:51,593 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:51,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable821 [2021-06-12 20:49:51,793 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:49:51,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:51,794 INFO L82 PathProgramCache]: Analyzing trace with hash -249157008, now seen corresponding path program 44 times [2021-06-12 20:49:51,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:51,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129685087] [2021-06-12 20:49:51,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:51,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:51,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129685087] [2021-06-12 20:49:51,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129685087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:51,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510297106] [2021-06-12 20:49:51,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:51,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:49:51,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:51,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:49:51,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:52,090 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:52,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 32 [2021-06-12 20:49:52,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:52,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:52,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:52,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:29 [2021-06-12 20:49:52,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:52,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510297106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:52,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:52,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:49:52,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669404820] [2021-06-12 20:49:52,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:49:52,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:52,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:49:52,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:49:52,237 INFO L87 Difference]: Start difference. First operand 3704 states and 14283 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:53,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:53,124 INFO L93 Difference]: Finished difference Result 3927 states and 14879 transitions. [2021-06-12 20:49:53,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:49:53,125 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:49:53,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:53,131 INFO L225 Difference]: With dead ends: 3927 [2021-06-12 20:49:53,131 INFO L226 Difference]: Without dead ends: 3897 [2021-06-12 20:49:53,132 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 710.3ms TimeCoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:49:53,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3897 states. [2021-06-12 20:49:53,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3897 to 3704. [2021-06-12 20:49:53,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3704 states, 3703 states have (on average 3.857142857142857) internal successors, (14283), 3703 states have internal predecessors, (14283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:53,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3704 states to 3704 states and 14283 transitions. [2021-06-12 20:49:53,204 INFO L78 Accepts]: Start accepts. Automaton has 3704 states and 14283 transitions. Word has length 24 [2021-06-12 20:49:53,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:53,204 INFO L482 AbstractCegarLoop]: Abstraction has 3704 states and 14283 transitions. [2021-06-12 20:49:53,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:53,204 INFO L276 IsEmpty]: Start isEmpty. Operand 3704 states and 14283 transitions. [2021-06-12 20:49:53,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:49:53,208 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:53,208 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:53,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable822 [2021-06-12 20:49:53,409 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:49:53,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:53,409 INFO L82 PathProgramCache]: Analyzing trace with hash 287765660, now seen corresponding path program 266 times [2021-06-12 20:49:53,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:53,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848302815] [2021-06-12 20:49:53,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:53,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:53,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:53,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:53,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848302815] [2021-06-12 20:49:53,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848302815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:53,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328289774] [2021-06-12 20:49:53,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:53,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:49:53,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:53,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:49:53,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:53,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:53,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-06-12 20:49:53,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:49:53,730 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-12 20:49:53,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:53,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:40 [2021-06-12 20:49:53,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:53,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328289774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:53,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:53,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:49:53,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671033624] [2021-06-12 20:49:53,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:49:53,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:53,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:49:53,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:49:53,823 INFO L87 Difference]: Start difference. First operand 3704 states and 14283 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:55,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:55,043 INFO L93 Difference]: Finished difference Result 3922 states and 14870 transitions. [2021-06-12 20:49:55,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:49:55,043 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:49:55,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:55,049 INFO L225 Difference]: With dead ends: 3922 [2021-06-12 20:49:55,049 INFO L226 Difference]: Without dead ends: 3874 [2021-06-12 20:49:55,049 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 890.0ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:49:55,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3874 states. [2021-06-12 20:49:55,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3874 to 3705. [2021-06-12 20:49:55,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3705 states, 3704 states have (on average 3.8569114470842334) internal successors, (14286), 3704 states have internal predecessors, (14286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:55,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3705 states to 3705 states and 14286 transitions. [2021-06-12 20:49:55,092 INFO L78 Accepts]: Start accepts. Automaton has 3705 states and 14286 transitions. Word has length 24 [2021-06-12 20:49:55,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:55,092 INFO L482 AbstractCegarLoop]: Abstraction has 3705 states and 14286 transitions. [2021-06-12 20:49:55,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:55,092 INFO L276 IsEmpty]: Start isEmpty. Operand 3705 states and 14286 transitions. [2021-06-12 20:49:55,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:49:55,097 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:55,097 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:55,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable826,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:55,297 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:49:55,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:55,297 INFO L82 PathProgramCache]: Analyzing trace with hash 82847526, now seen corresponding path program 45 times [2021-06-12 20:49:55,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:55,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365923743] [2021-06-12 20:49:55,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:55,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:55,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:55,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365923743] [2021-06-12 20:49:55,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365923743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:55,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757561727] [2021-06-12 20:49:55,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:55,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:49:55,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:55,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:49:55,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:55,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:55,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:55,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 51 [2021-06-12 20:49:55,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 20:49:55,680 INFO L628 ElimStorePlain]: treesize reduction 129, result has 17.8 percent of original size [2021-06-12 20:49:55,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:55,681 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:28 [2021-06-12 20:49:55,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:55,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757561727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:55,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:55,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-06-12 20:49:55,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309418019] [2021-06-12 20:49:55,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:49:55,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:55,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:49:55,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:49:55,776 INFO L87 Difference]: Start difference. First operand 3705 states and 14286 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:56,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:56,956 INFO L93 Difference]: Finished difference Result 3880 states and 14772 transitions. [2021-06-12 20:49:56,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:49:56,956 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:49:56,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:56,963 INFO L225 Difference]: With dead ends: 3880 [2021-06-12 20:49:56,963 INFO L226 Difference]: Without dead ends: 3850 [2021-06-12 20:49:56,963 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 936.4ms TimeCoverageRelationStatistics Valid=186, Invalid=1794, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:49:56,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3850 states. [2021-06-12 20:49:57,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3850 to 3722. [2021-06-12 20:49:57,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3722 states, 3721 states have (on average 3.856758935769954) internal successors, (14351), 3721 states have internal predecessors, (14351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:57,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3722 states to 3722 states and 14351 transitions. [2021-06-12 20:49:57,010 INFO L78 Accepts]: Start accepts. Automaton has 3722 states and 14351 transitions. Word has length 24 [2021-06-12 20:49:57,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:57,010 INFO L482 AbstractCegarLoop]: Abstraction has 3722 states and 14351 transitions. [2021-06-12 20:49:57,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:57,011 INFO L276 IsEmpty]: Start isEmpty. Operand 3722 states and 14351 transitions. [2021-06-12 20:49:57,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:49:57,015 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:57,015 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:57,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable831 [2021-06-12 20:49:57,216 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:49:57,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:57,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1902673252, now seen corresponding path program 46 times [2021-06-12 20:49:57,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:57,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217565770] [2021-06-12 20:49:57,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:57,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:57,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:57,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217565770] [2021-06-12 20:49:57,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217565770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:57,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973689253] [2021-06-12 20:49:57,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:57,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:49:57,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:57,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:49:57,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:57,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-12 20:49:57,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:57,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:57,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:57,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-06-12 20:49:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:57,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973689253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:57,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:57,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-12 20:49:57,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922936329] [2021-06-12 20:49:57,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:49:57,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:57,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:49:57,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:49:57,563 INFO L87 Difference]: Start difference. First operand 3722 states and 14351 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:58,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:58,361 INFO L93 Difference]: Finished difference Result 3859 states and 14748 transitions. [2021-06-12 20:49:58,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:49:58,361 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:49:58,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:58,366 INFO L225 Difference]: With dead ends: 3859 [2021-06-12 20:49:58,366 INFO L226 Difference]: Without dead ends: 3850 [2021-06-12 20:49:58,367 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 589.3ms TimeCoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:49:58,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3850 states. [2021-06-12 20:49:58,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3850 to 3722. [2021-06-12 20:49:58,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3722 states, 3721 states have (on average 3.857833915614082) internal successors, (14355), 3721 states have internal predecessors, (14355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:58,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3722 states to 3722 states and 14355 transitions. [2021-06-12 20:49:58,427 INFO L78 Accepts]: Start accepts. Automaton has 3722 states and 14355 transitions. Word has length 24 [2021-06-12 20:49:58,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:58,427 INFO L482 AbstractCegarLoop]: Abstraction has 3722 states and 14355 transitions. [2021-06-12 20:49:58,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:58,427 INFO L276 IsEmpty]: Start isEmpty. Operand 3722 states and 14355 transitions. [2021-06-12 20:49:58,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:49:58,432 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:58,432 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:58,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable843,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:58,633 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:49:58,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:58,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1920666464, now seen corresponding path program 267 times [2021-06-12 20:49:58,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:58,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276308161] [2021-06-12 20:49:58,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:58,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:58,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:58,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:58,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276308161] [2021-06-12 20:49:58,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276308161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:58,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766006106] [2021-06-12 20:49:58,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:58,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:49:58,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:58,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:49:58,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:59,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:59,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:59,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:49:59,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:59,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:59,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:59,087 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 20:49:59,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:59,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766006106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:59,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:59,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:49:59,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961445117] [2021-06-12 20:49:59,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:49:59,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:59,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:49:59,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:49:59,119 INFO L87 Difference]: Start difference. First operand 3722 states and 14355 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:00,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:00,092 INFO L93 Difference]: Finished difference Result 4132 states and 15604 transitions. [2021-06-12 20:50:00,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:50:00,092 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:50:00,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:00,101 INFO L225 Difference]: With dead ends: 4132 [2021-06-12 20:50:00,101 INFO L226 Difference]: Without dead ends: 4123 [2021-06-12 20:50:00,101 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 730.9ms TimeCoverageRelationStatistics Valid=231, Invalid=1251, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:50:00,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2021-06-12 20:50:00,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 3725. [2021-06-12 20:50:00,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3725 states, 3724 states have (on average 3.8574113856068744) internal successors, (14365), 3724 states have internal predecessors, (14365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:00,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3725 states to 3725 states and 14365 transitions. [2021-06-12 20:50:00,216 INFO L78 Accepts]: Start accepts. Automaton has 3725 states and 14365 transitions. Word has length 24 [2021-06-12 20:50:00,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:00,216 INFO L482 AbstractCegarLoop]: Abstraction has 3725 states and 14365 transitions. [2021-06-12 20:50:00,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:00,216 INFO L276 IsEmpty]: Start isEmpty. Operand 3725 states and 14365 transitions. [2021-06-12 20:50:00,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:50:00,222 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:00,222 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:00,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable844 [2021-06-12 20:50:00,437 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:50:00,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:00,437 INFO L82 PathProgramCache]: Analyzing trace with hash 30631814, now seen corresponding path program 268 times [2021-06-12 20:50:00,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:00,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829048847] [2021-06-12 20:50:00,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:00,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:00,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:00,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:00,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829048847] [2021-06-12 20:50:00,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829048847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:00,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477615648] [2021-06-12 20:50:00,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:00,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:50:00,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:00,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:50:00,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:00,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:50:00,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:00,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:00,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:00,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:50:00,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:00,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477615648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:00,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:00,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:50:00,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169206789] [2021-06-12 20:50:00,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:50:00,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:00,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:50:00,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:50:00,806 INFO L87 Difference]: Start difference. First operand 3725 states and 14365 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:01,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:01,819 INFO L93 Difference]: Finished difference Result 4103 states and 15510 transitions. [2021-06-12 20:50:01,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:50:01,819 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:50:01,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:01,825 INFO L225 Difference]: With dead ends: 4103 [2021-06-12 20:50:01,825 INFO L226 Difference]: Without dead ends: 4094 [2021-06-12 20:50:01,826 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 832.3ms TimeCoverageRelationStatistics Valid=267, Invalid=1455, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:50:01,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4094 states. [2021-06-12 20:50:01,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4094 to 3726. [2021-06-12 20:50:01,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3726 states, 3725 states have (on average 3.8574496644295304) internal successors, (14369), 3725 states have internal predecessors, (14369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:01,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3726 states to 3726 states and 14369 transitions. [2021-06-12 20:50:01,878 INFO L78 Accepts]: Start accepts. Automaton has 3726 states and 14369 transitions. Word has length 24 [2021-06-12 20:50:01,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:01,878 INFO L482 AbstractCegarLoop]: Abstraction has 3726 states and 14369 transitions. [2021-06-12 20:50:01,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:01,879 INFO L276 IsEmpty]: Start isEmpty. Operand 3726 states and 14369 transitions. [2021-06-12 20:50:01,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:50:01,884 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:01,884 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:02,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable845,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:02,084 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:50:02,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:02,085 INFO L82 PathProgramCache]: Analyzing trace with hash -855166466, now seen corresponding path program 269 times [2021-06-12 20:50:02,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:02,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111269597] [2021-06-12 20:50:02,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:02,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:02,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:02,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:02,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111269597] [2021-06-12 20:50:02,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111269597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:02,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052067748] [2021-06-12 20:50:02,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:02,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:50:02,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:02,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:50:02,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:02,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:50:02,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:02,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:02,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:02,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-12 20:50:02,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:02,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052067748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:02,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:02,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:50:02,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854538130] [2021-06-12 20:50:02,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:50:02,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:02,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:50:02,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:50:02,544 INFO L87 Difference]: Start difference. First operand 3726 states and 14369 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:03,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:03,625 INFO L93 Difference]: Finished difference Result 4151 states and 15678 transitions. [2021-06-12 20:50:03,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:50:03,625 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:50:03,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:03,632 INFO L225 Difference]: With dead ends: 4151 [2021-06-12 20:50:03,632 INFO L226 Difference]: Without dead ends: 4141 [2021-06-12 20:50:03,633 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 908.4ms TimeCoverageRelationStatistics Valid=277, Invalid=1529, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:50:03,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4141 states. [2021-06-12 20:50:03,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4141 to 3725. [2021-06-12 20:50:03,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3725 states, 3724 states have (on average 3.8579484425349087) internal successors, (14367), 3724 states have internal predecessors, (14367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:03,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3725 states to 3725 states and 14367 transitions. [2021-06-12 20:50:03,687 INFO L78 Accepts]: Start accepts. Automaton has 3725 states and 14367 transitions. Word has length 24 [2021-06-12 20:50:03,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:03,687 INFO L482 AbstractCegarLoop]: Abstraction has 3725 states and 14367 transitions. [2021-06-12 20:50:03,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:03,687 INFO L276 IsEmpty]: Start isEmpty. Operand 3725 states and 14367 transitions. [2021-06-12 20:50:03,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:50:03,692 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:03,692 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:03,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable846 [2021-06-12 20:50:03,893 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:50:03,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:03,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1883316326, now seen corresponding path program 270 times [2021-06-12 20:50:03,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:03,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089432967] [2021-06-12 20:50:03,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:03,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:04,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:04,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:04,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089432967] [2021-06-12 20:50:04,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089432967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:04,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902501873] [2021-06-12 20:50:04,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:04,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:50:04,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:04,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:50:04,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:04,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:04,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-12 20:50:04,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:04,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:04,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:04,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 20:50:04,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:04,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902501873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:04,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:04,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:50:04,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032053132] [2021-06-12 20:50:04,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:50:04,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:04,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:50:04,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:50:04,345 INFO L87 Difference]: Start difference. First operand 3725 states and 14367 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:05,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:05,126 INFO L93 Difference]: Finished difference Result 4089 states and 15483 transitions. [2021-06-12 20:50:05,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:50:05,126 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:50:05,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:05,133 INFO L225 Difference]: With dead ends: 4089 [2021-06-12 20:50:05,133 INFO L226 Difference]: Without dead ends: 4080 [2021-06-12 20:50:05,133 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 775.4ms TimeCoverageRelationStatistics Valid=263, Invalid=1377, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:50:05,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4080 states. [2021-06-12 20:50:05,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4080 to 3730. [2021-06-12 20:50:05,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3730 states, 3729 states have (on average 3.857066237597211) internal successors, (14383), 3729 states have internal predecessors, (14383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:05,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3730 states to 3730 states and 14383 transitions. [2021-06-12 20:50:05,190 INFO L78 Accepts]: Start accepts. Automaton has 3730 states and 14383 transitions. Word has length 24 [2021-06-12 20:50:05,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:05,190 INFO L482 AbstractCegarLoop]: Abstraction has 3730 states and 14383 transitions. [2021-06-12 20:50:05,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:05,190 INFO L276 IsEmpty]: Start isEmpty. Operand 3730 states and 14383 transitions. [2021-06-12 20:50:05,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:50:05,196 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:05,196 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:05,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable847,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:05,396 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:50:05,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:05,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1559730148, now seen corresponding path program 271 times [2021-06-12 20:50:05,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:05,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192606145] [2021-06-12 20:50:05,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:05,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:05,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:05,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192606145] [2021-06-12 20:50:05,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192606145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:05,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387691386] [2021-06-12 20:50:05,608 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:05,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:50:05,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:05,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:50:05,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:05,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:05,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:05,788 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:50:05,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:05,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387691386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:05,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:05,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:50:05,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507539002] [2021-06-12 20:50:05,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:50:05,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:05,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:50:05,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:50:05,831 INFO L87 Difference]: Start difference. First operand 3730 states and 14383 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:06,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:06,621 INFO L93 Difference]: Finished difference Result 4164 states and 15742 transitions. [2021-06-12 20:50:06,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:50:06,621 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:50:06,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:06,628 INFO L225 Difference]: With dead ends: 4164 [2021-06-12 20:50:06,628 INFO L226 Difference]: Without dead ends: 4153 [2021-06-12 20:50:06,628 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 709.2ms TimeCoverageRelationStatistics Valid=245, Invalid=1477, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:50:06,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4153 states. [2021-06-12 20:50:06,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4153 to 3724. [2021-06-12 20:50:06,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3724 states, 3723 states have (on average 3.8579102874026323) internal successors, (14363), 3723 states have internal predecessors, (14363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:06,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3724 states to 3724 states and 14363 transitions. [2021-06-12 20:50:06,677 INFO L78 Accepts]: Start accepts. Automaton has 3724 states and 14363 transitions. Word has length 24 [2021-06-12 20:50:06,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:06,677 INFO L482 AbstractCegarLoop]: Abstraction has 3724 states and 14363 transitions. [2021-06-12 20:50:06,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:06,677 INFO L276 IsEmpty]: Start isEmpty. Operand 3724 states and 14363 transitions. [2021-06-12 20:50:06,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:50:06,682 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:06,682 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:06,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable849,423 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:06,882 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:50:06,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:06,883 INFO L82 PathProgramCache]: Analyzing trace with hash 208494864, now seen corresponding path program 272 times [2021-06-12 20:50:06,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:06,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206298936] [2021-06-12 20:50:06,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:06,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:07,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:07,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206298936] [2021-06-12 20:50:07,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206298936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:07,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474847354] [2021-06-12 20:50:07,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:07,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:50:07,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:07,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:50:07,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:07,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:07,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:07,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:50:07,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:07,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:07,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:07,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 20:50:07,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:07,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474847354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:07,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:07,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:50:07,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938752291] [2021-06-12 20:50:07,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:50:07,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:07,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:50:07,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:50:07,364 INFO L87 Difference]: Start difference. First operand 3724 states and 14363 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:08,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:08,279 INFO L93 Difference]: Finished difference Result 4152 states and 15661 transitions. [2021-06-12 20:50:08,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:50:08,280 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:50:08,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:08,286 INFO L225 Difference]: With dead ends: 4152 [2021-06-12 20:50:08,287 INFO L226 Difference]: Without dead ends: 4143 [2021-06-12 20:50:08,287 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 796.8ms TimeCoverageRelationStatistics Valid=257, Invalid=1465, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:50:08,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2021-06-12 20:50:08,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 3724. [2021-06-12 20:50:08,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3724 states, 3723 states have (on average 3.8579102874026323) internal successors, (14363), 3723 states have internal predecessors, (14363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:08,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3724 states to 3724 states and 14363 transitions. [2021-06-12 20:50:08,341 INFO L78 Accepts]: Start accepts. Automaton has 3724 states and 14363 transitions. Word has length 24 [2021-06-12 20:50:08,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:08,341 INFO L482 AbstractCegarLoop]: Abstraction has 3724 states and 14363 transitions. [2021-06-12 20:50:08,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:08,341 INFO L276 IsEmpty]: Start isEmpty. Operand 3724 states and 14363 transitions. [2021-06-12 20:50:08,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:50:08,346 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:08,346 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:08,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable850,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:08,546 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:50:08,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:08,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1299587194, now seen corresponding path program 273 times [2021-06-12 20:50:08,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:08,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336352705] [2021-06-12 20:50:08,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:08,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:08,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:08,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:08,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336352705] [2021-06-12 20:50:08,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336352705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:08,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111734683] [2021-06-12 20:50:08,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:08,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:50:08,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:08,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:50:08,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:08,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:08,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:08,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:50:08,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:08,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:08,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:08,966 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 20:50:08,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:08,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111734683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:08,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:08,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 20:50:08,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266278246] [2021-06-12 20:50:08,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:50:08,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:08,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:50:08,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:50:08,994 INFO L87 Difference]: Start difference. First operand 3724 states and 14363 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:10,032 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-06-12 20:50:10,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:10,598 INFO L93 Difference]: Finished difference Result 4201 states and 15826 transitions. [2021-06-12 20:50:10,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:50:10,598 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:50:10,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:10,605 INFO L225 Difference]: With dead ends: 4201 [2021-06-12 20:50:10,605 INFO L226 Difference]: Without dead ends: 4182 [2021-06-12 20:50:10,606 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1140.5ms TimeCoverageRelationStatistics Valid=330, Invalid=1740, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:50:10,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4182 states. [2021-06-12 20:50:10,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4182 to 3728. [2021-06-12 20:50:10,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3728 states, 3727 states have (on average 3.856989535819694) internal successors, (14375), 3727 states have internal predecessors, (14375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:10,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 14375 transitions. [2021-06-12 20:50:10,660 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 14375 transitions. Word has length 24 [2021-06-12 20:50:10,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:10,660 INFO L482 AbstractCegarLoop]: Abstraction has 3728 states and 14375 transitions. [2021-06-12 20:50:10,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:10,660 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 14375 transitions. [2021-06-12 20:50:10,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:50:10,665 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:10,665 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:10,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable851 [2021-06-12 20:50:10,881 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:50:10,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:10,881 INFO L82 PathProgramCache]: Analyzing trace with hash 636656318, now seen corresponding path program 274 times [2021-06-12 20:50:10,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:10,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995328101] [2021-06-12 20:50:10,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:10,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:11,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:11,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:11,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995328101] [2021-06-12 20:50:11,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995328101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:11,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824881403] [2021-06-12 20:50:11,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:11,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:50:11,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:11,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:50:11,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:11,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 20:50:11,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:11,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:11,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:11,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-12 20:50:11,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:11,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824881403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:11,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:11,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 20:50:11,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112887790] [2021-06-12 20:50:11,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:50:11,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:11,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:50:11,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:50:11,280 INFO L87 Difference]: Start difference. First operand 3728 states and 14375 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:12,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:12,392 INFO L93 Difference]: Finished difference Result 4160 states and 15705 transitions. [2021-06-12 20:50:12,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:50:12,392 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:50:12,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:12,398 INFO L225 Difference]: With dead ends: 4160 [2021-06-12 20:50:12,398 INFO L226 Difference]: Without dead ends: 4141 [2021-06-12 20:50:12,399 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 917.8ms TimeCoverageRelationStatistics Valid=290, Invalid=1516, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:50:12,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4141 states. [2021-06-12 20:50:12,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4141 to 3727. [2021-06-12 20:50:12,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3727 states, 3726 states have (on average 3.8580246913580245) internal successors, (14375), 3726 states have internal predecessors, (14375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:12,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3727 states to 3727 states and 14375 transitions. [2021-06-12 20:50:12,447 INFO L78 Accepts]: Start accepts. Automaton has 3727 states and 14375 transitions. Word has length 24 [2021-06-12 20:50:12,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:12,448 INFO L482 AbstractCegarLoop]: Abstraction has 3727 states and 14375 transitions. [2021-06-12 20:50:12,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:12,448 INFO L276 IsEmpty]: Start isEmpty. Operand 3727 states and 14375 transitions. [2021-06-12 20:50:12,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:50:12,452 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:12,452 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:12,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable852,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:12,653 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:50:12,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:12,653 INFO L82 PathProgramCache]: Analyzing trace with hash 460114886, now seen corresponding path program 275 times [2021-06-12 20:50:12,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:12,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019400958] [2021-06-12 20:50:12,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:12,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:12,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:12,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019400958] [2021-06-12 20:50:12,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019400958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:12,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405001274] [2021-06-12 20:50:12,827 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:12,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:50:12,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:12,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:50:12,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:12,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:50:12,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:12,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:12,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:12,986 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:50:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:13,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405001274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:13,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:13,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 20:50:13,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634782434] [2021-06-12 20:50:13,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:50:13,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:13,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:50:13,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:50:13,032 INFO L87 Difference]: Start difference. First operand 3727 states and 14375 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:13,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:13,914 INFO L93 Difference]: Finished difference Result 4115 states and 15566 transitions. [2021-06-12 20:50:13,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:50:13,915 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:50:13,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:13,920 INFO L225 Difference]: With dead ends: 4115 [2021-06-12 20:50:13,920 INFO L226 Difference]: Without dead ends: 4106 [2021-06-12 20:50:13,921 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 813.8ms TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:50:13,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2021-06-12 20:50:13,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 3729. [2021-06-12 20:50:13,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3729 states, 3728 states have (on average 3.8575643776824036) internal successors, (14381), 3728 states have internal predecessors, (14381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:13,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3729 states to 3729 states and 14381 transitions. [2021-06-12 20:50:13,976 INFO L78 Accepts]: Start accepts. Automaton has 3729 states and 14381 transitions. Word has length 24 [2021-06-12 20:50:13,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:13,976 INFO L482 AbstractCegarLoop]: Abstraction has 3729 states and 14381 transitions. [2021-06-12 20:50:13,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:13,976 INFO L276 IsEmpty]: Start isEmpty. Operand 3729 states and 14381 transitions. [2021-06-12 20:50:13,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:50:13,981 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:13,981 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:14,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable853 [2021-06-12 20:50:14,181 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:50:14,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:14,181 INFO L82 PathProgramCache]: Analyzing trace with hash -373623554, now seen corresponding path program 276 times [2021-06-12 20:50:14,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:14,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988626530] [2021-06-12 20:50:14,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:14,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:14,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:14,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:14,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988626530] [2021-06-12 20:50:14,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988626530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:14,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532658066] [2021-06-12 20:50:14,384 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:14,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:50:14,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:14,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 20:50:14,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:14,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:14,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:14,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 45 [2021-06-12 20:50:14,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:14,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:14,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:14,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:129 [2021-06-12 20:50:14,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:14,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532658066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:14,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:14,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 20:50:14,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988274054] [2021-06-12 20:50:14,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:50:14,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:14,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:50:14,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:50:14,728 INFO L87 Difference]: Start difference. First operand 3729 states and 14381 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:16,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:16,068 INFO L93 Difference]: Finished difference Result 4171 states and 15650 transitions. [2021-06-12 20:50:16,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 20:50:16,068 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:50:16,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:16,074 INFO L225 Difference]: With dead ends: 4171 [2021-06-12 20:50:16,075 INFO L226 Difference]: Without dead ends: 4155 [2021-06-12 20:50:16,075 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 1275.1ms TimeCoverageRelationStatistics Valid=365, Invalid=1987, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 20:50:16,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2021-06-12 20:50:16,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 3733. [2021-06-12 20:50:16,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3733 states, 3732 states have (on average 3.856913183279743) internal successors, (14394), 3732 states have internal predecessors, (14394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:16,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3733 states to 3733 states and 14394 transitions. [2021-06-12 20:50:16,124 INFO L78 Accepts]: Start accepts. Automaton has 3733 states and 14394 transitions. Word has length 24 [2021-06-12 20:50:16,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:16,125 INFO L482 AbstractCegarLoop]: Abstraction has 3733 states and 14394 transitions. [2021-06-12 20:50:16,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:16,125 INFO L276 IsEmpty]: Start isEmpty. Operand 3733 states and 14394 transitions. [2021-06-12 20:50:16,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:50:16,129 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:16,129 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:16,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable854,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:16,330 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:50:16,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:16,330 INFO L82 PathProgramCache]: Analyzing trace with hash 408210246, now seen corresponding path program 277 times [2021-06-12 20:50:16,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:16,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572041455] [2021-06-12 20:50:16,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:16,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:16,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:16,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572041455] [2021-06-12 20:50:16,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572041455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:16,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430873365] [2021-06-12 20:50:16,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:16,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:16,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:50:16,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:16,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 20:50:16,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:16,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:16,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:16,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-12 20:50:16,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:16,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430873365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:16,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:16,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 20:50:16,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640457997] [2021-06-12 20:50:16,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:50:16,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:16,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:50:16,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:50:16,674 INFO L87 Difference]: Start difference. First operand 3733 states and 14394 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:17,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:17,492 INFO L93 Difference]: Finished difference Result 4076 states and 15440 transitions. [2021-06-12 20:50:17,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:50:17,492 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:50:17,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:17,498 INFO L225 Difference]: With dead ends: 4076 [2021-06-12 20:50:17,498 INFO L226 Difference]: Without dead ends: 4066 [2021-06-12 20:50:17,498 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 693.6ms TimeCoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:50:17,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4066 states. [2021-06-12 20:50:17,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4066 to 3728. [2021-06-12 20:50:17,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3728 states, 3727 states have (on average 3.8564529111886237) internal successors, (14373), 3727 states have internal predecessors, (14373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:17,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 14373 transitions. [2021-06-12 20:50:17,547 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 14373 transitions. Word has length 24 [2021-06-12 20:50:17,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:17,547 INFO L482 AbstractCegarLoop]: Abstraction has 3728 states and 14373 transitions. [2021-06-12 20:50:17,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:17,548 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 14373 transitions. [2021-06-12 20:50:17,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:50:17,552 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:17,552 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:17,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable862 [2021-06-12 20:50:17,753 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:50:17,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:17,753 INFO L82 PathProgramCache]: Analyzing trace with hash -652436026, now seen corresponding path program 278 times [2021-06-12 20:50:17,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:17,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351345194] [2021-06-12 20:50:17,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:17,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:17,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:17,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351345194] [2021-06-12 20:50:17,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351345194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:17,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995004203] [2021-06-12 20:50:17,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:17,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:50:17,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:17,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 20:50:17,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:18,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:18,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:18,140 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:18,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-06-12 20:50:18,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:50:18,162 INFO L628 ElimStorePlain]: treesize reduction 25, result has 46.8 percent of original size [2021-06-12 20:50:18,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:18,163 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-06-12 20:50:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:18,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995004203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:18,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:18,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:50:18,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877339970] [2021-06-12 20:50:18,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:50:18,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:18,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:50:18,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:50:18,222 INFO L87 Difference]: Start difference. First operand 3728 states and 14373 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:19,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:19,243 INFO L93 Difference]: Finished difference Result 4138 states and 15595 transitions. [2021-06-12 20:50:19,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:50:19,244 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:50:19,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:19,250 INFO L225 Difference]: With dead ends: 4138 [2021-06-12 20:50:19,250 INFO L226 Difference]: Without dead ends: 4120 [2021-06-12 20:50:19,250 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 901.7ms TimeCoverageRelationStatistics Valid=274, Invalid=1618, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:50:19,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4120 states. [2021-06-12 20:50:19,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4120 to 3729. [2021-06-12 20:50:19,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3729 states, 3728 states have (on average 3.8564914163090127) internal successors, (14377), 3728 states have internal predecessors, (14377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:19,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3729 states to 3729 states and 14377 transitions. [2021-06-12 20:50:19,330 INFO L78 Accepts]: Start accepts. Automaton has 3729 states and 14377 transitions. Word has length 24 [2021-06-12 20:50:19,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:19,330 INFO L482 AbstractCegarLoop]: Abstraction has 3729 states and 14377 transitions. [2021-06-12 20:50:19,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:19,330 INFO L276 IsEmpty]: Start isEmpty. Operand 3729 states and 14377 transitions. [2021-06-12 20:50:19,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:50:19,335 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:19,335 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:19,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable863,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:19,535 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:50:19,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:19,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1076235720, now seen corresponding path program 279 times [2021-06-12 20:50:19,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:19,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985088187] [2021-06-12 20:50:19,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:19,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:19,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:19,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985088187] [2021-06-12 20:50:19,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985088187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:19,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162923957] [2021-06-12 20:50:19,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:19,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:50:19,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:19,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 20:50:19,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:19,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:19,932 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:19,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 44 [2021-06-12 20:50:19,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:19,968 INFO L628 ElimStorePlain]: treesize reduction 29, result has 53.2 percent of original size [2021-06-12 20:50:19,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:19,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:43 [2021-06-12 20:50:20,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:20,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162923957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:20,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:20,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-12 20:50:20,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355180170] [2021-06-12 20:50:20,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:50:20,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:20,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:50:20,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:50:20,032 INFO L87 Difference]: Start difference. First operand 3729 states and 14377 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-12 20:50:20,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:50:20,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable867 [2021-06-12 20:50:20,281 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-12 20:50:20,281 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was TIMEOUT (3/3) [2021-06-12 20:50:20,282 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 20:50:20,284 WARN L196 ceAbstractionStarter]: Timeout [2021-06-12 20:50:20,284 INFO L202 PluginConnector]: Adding new model parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 08:50:20 BasicIcfg [2021-06-12 20:50:20,284 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 20:50:20,284 INFO L168 Benchmark]: Toolchain (without parser) took 824229.82 ms. Allocated memory was 206.6 MB in the beginning and 896.5 MB in the end (delta: 690.0 MB). Free memory was 186.1 MB in the beginning and 675.3 MB in the end (delta: -489.2 MB). Peak memory consumption was 201.3 MB. Max. memory is 8.0 GB. [2021-06-12 20:50:20,285 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 206.6 MB. Free memory is still 187.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 20:50:20,285 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.83 ms. Allocated memory is still 206.6 MB. Free memory was 186.0 MB in the beginning and 184.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 20:50:20,285 INFO L168 Benchmark]: Boogie Preprocessor took 12.94 ms. Allocated memory is still 206.6 MB. Free memory was 184.6 MB in the beginning and 183.7 MB in the end (delta: 901.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 20:50:20,292 INFO L168 Benchmark]: RCFGBuilder took 240.86 ms. Allocated memory is still 206.6 MB. Free memory was 183.6 MB in the beginning and 168.0 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-06-12 20:50:20,292 INFO L168 Benchmark]: TraceAbstraction took 823938.94 ms. Allocated memory was 206.6 MB in the beginning and 896.5 MB in the end (delta: 690.0 MB). Free memory was 167.6 MB in the beginning and 675.3 MB in the end (delta: -507.8 MB). Peak memory consumption was 183.5 MB. Max. memory is 8.0 GB. [2021-06-12 20:50:20,292 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 206.6 MB. Free memory is still 187.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 23.83 ms. Allocated memory is still 206.6 MB. Free memory was 186.0 MB in the beginning and 184.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.94 ms. Allocated memory is still 206.6 MB. Free memory was 184.6 MB in the beginning and 183.7 MB in the end (delta: 901.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 240.86 ms. Allocated memory is still 206.6 MB. Free memory was 183.6 MB in the beginning and 168.0 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 823938.94 ms. Allocated memory was 206.6 MB in the beginning and 896.5 MB in the end (delta: 690.0 MB). Free memory was 167.6 MB in the beginning and 675.3 MB in the end (delta: -507.8 MB). Peak memory consumption was 183.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (3729states) and FLOYD_HOARE automaton (currently 6 states, 25 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 26 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: thread1 with 1 thread instances CFG has 9 procedures, 49 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 36.6ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 7.2ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 26.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: thread1Thread1of1ForFork0 with 1 thread instances CFG has 9 procedures, 49 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.8ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 2.7ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 9 procedures, 49 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 823806.9ms, OverallIterations: 442, TraceHistogramMax: 2, EmptinessCheckTime: 1134.8ms, AutomataDifference: 563994.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 29728 SDtfs, 85075 SDslu, 268886 SDs, 0 SdLazy, 405889 SolverSat, 46423 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 162489.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25997 GetRequests, 6506 SyntacticMatches, 529 SemanticMatches, 18961 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283606 ImplicationChecksByTransitivity, 463403.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3733occurred in iteration=439, InterpolantAutomatonStates: 16476, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 13077.6ms AutomataMinimizationTime, 441 MinimizatonAttempts, 265166 StatesRemovedByMinimization, 440 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1626.5ms SsaConstructionTime, 3981.3ms SatisfiabilityAnalysisTime, 144078.1ms InterpolantComputationTime, 20396 NumberOfCodeBlocks, 20396 NumberOfCodeBlocksAsserted, 1346 NumberOfCheckSat, 19524 ConstructedInterpolants, 463 QuantifiedInterpolants, 281594 SizeOfPredicates, 3470 NumberOfNonLiveVariables, 35322 ConjunctsInSsa, 12972 ConjunctsInUnsatCore, 872 InterpolantComputations, 12 PerfectInterpolantSequences, 165/5102 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown