/usr/bin/java -Xmx16000000000 -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 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 22:32:54,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 22:32:54,058 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 22:32:54,075 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 22:32:54,096 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 [2021-06-05 22:32:54,110 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 22:32:54,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 22:32:54,111 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 22:32:54,111 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 22:32:54,112 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 22:32:54,112 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 22:32:54,112 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 22:32:54,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 22:32:54,112 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 22:32:54,112 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 22:32:54,112 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 22:32:54,112 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 22:32:54,113 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 22:32:54,113 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 22:32:54,113 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 22:32:54,113 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 22:32:54,113 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 22:32:54,113 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 22:32:54,113 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 22:32:54,113 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 22:32:54,114 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 22:32:54,114 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 22:32:54,114 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 22:32:54,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 22:32:54,114 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 22:32:54,114 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 22:32:54,114 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 22:32:54,114 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 22:32:54,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 22:32:54,115 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 22:32:54,115 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 22:32:54,115 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 22:32:54,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 22:32:54,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 22:32:54,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 22:32:54,365 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 22:32:54,366 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 22:32:54,366 INFO L432 ainManager$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 [2021-06-05 22:32:54,367 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-equiv.wvr.bpl' [2021-06-05 22:32:54,520 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 22:32:54,580 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 22:32:54,583 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 22:32:54,584 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 22:32:54,584 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 22:32:54,592 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 05.06 10:32:54" (1/1) ... [2021-06-05 22:32:54,598 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 05.06 10:32:54" (1/1) ... [2021-06-05 22:32:54,605 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 22:32:54,606 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 22:32:54,606 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 22:32:54,606 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 22:32:54,611 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 05.06 10:32:54" (1/1) ... [2021-06-05 22:32:54,612 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 05.06 10:32:54" (1/1) ... [2021-06-05 22:32:54,612 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 05.06 10:32:54" (1/1) ... [2021-06-05 22:32:54,613 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 05.06 10:32:54" (1/1) ... [2021-06-05 22:32:54,615 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 05.06 10:32:54" (1/1) ... [2021-06-05 22:32:54,616 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 05.06 10:32:54" (1/1) ... [2021-06-05 22:32:54,617 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 05.06 10:32:54" (1/1) ... [2021-06-05 22:32:54,618 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 22:32:54,618 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 22:32:54,618 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 22:32:54,618 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 22:32:54,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:32:54" (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 [2021-06-05 22:32:54,691 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 22:32:54,691 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 22:32:54,691 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 22:32:54,691 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 22:32:54,692 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 22:32:54,692 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 22:32:54,692 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 22:32:54,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 22:32:54,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 22:32:54,692 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 22:32:54,692 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 22:32:54,692 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 22:32:54,692 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 22:32:54,692 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 22:32:54,693 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 22:32:54,705 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 22:32:54,949 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 22:32:54,950 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-06-05 22:32:54,950 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 22:32:54,951 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-06-05 22:32:54,951 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2021-06-05 22:32:54,952 INFO L202 PluginConnector]: Adding new model parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:32:54 BoogieIcfgContainer [2021-06-05 22:32:54,952 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 22:32:54,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 22:32:54,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 22:32:54,955 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 22:32:54,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:32:54" (1/2) ... [2021-06-05 22:32:54,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f5574ba and model type parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 10:32:54, skipping insertion in model container [2021-06-05 22:32:54,956 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 05.06 10:32:54" (2/2) ... [2021-06-05 22:32:54,957 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-equiv.wvr.bpl [2021-06-05 22:32:54,973 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 22:32:54,974 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 22:32:54,974 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 22:32:54,974 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 22:32:55,062 INFO L149 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2021-06-05 22:32:55,080 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-05 22:32:55,106 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 22:32:55,106 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 22:32:55,106 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 22:32:55,106 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 22:32:55,106 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 22:32:55,107 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 22:32:55,107 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 22:32:55,107 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thread1======== [2021-06-05 22:32:55,117 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 33 transitions, 110 flow [2021-06-05 22:32:55,137 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) [2021-06-05 22:32:55,138 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) [2021-06-05 22:32:55,147 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 22:32:55,147 INFO L301 ceAbstractionStarter]: Result for error location thread1 was SAFE (1/3) [2021-06-05 22:32:55,149 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-05 22:32:55,154 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 22:32:55,155 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 22:32:55,155 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 22:32:55,155 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 22:32:55,155 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 22:32:55,155 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 22:32:55,155 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 22:32:55,155 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thread1Thread1of1ForFork0======== [2021-06-05 22:32:55,158 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 33 transitions, 110 flow [2021-06-05 22:32:55,165 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) [2021-06-05 22:32:55,165 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) [2021-06-05 22:32:55,167 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 22:32:55,168 INFO L301 ceAbstractionStarter]: Result for error location thread1Thread1of1ForFork0 was SAFE (2/3) [2021-06-05 22:32:55,168 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 22:32:55,180 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 22:32:55,180 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 22:32:55,180 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 22:32:55,180 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 22:32:55,181 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 22:32:55,181 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 22:32:55,181 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 22:32:55,181 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 22:32:55,182 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 33 transitions, 110 flow [2021-06-05 22:32:55,184 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) [2021-06-05 22:32:55,185 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) [2021-06-05 22:32:55,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:32:55,186 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:55,187 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:55,187 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:32:55,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:55,190 INFO L82 PathProgramCache]: Analyzing trace with hash 848381826, now seen corresponding path program 1 times [2021-06-05 22:32:55,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:55,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370618053] [2021-06-05 22:32:55,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:55,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:55,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:55,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:55,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370618053] [2021-06-05 22:32:55,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370618053] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:32:55,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:32:55,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 22:32:55,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216584577] [2021-06-05 22:32:55,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:32:55,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:55,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:32:55,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:32:55,331 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) [2021-06-05 22:32:55,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:55,387 INFO L93 Difference]: Finished difference Result 253 states and 745 transitions. [2021-06-05 22:32:55,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:32:55,388 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 [2021-06-05 22:32:55,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:55,397 INFO L225 Difference]: With dead ends: 253 [2021-06-05 22:32:55,397 INFO L226 Difference]: Without dead ends: 247 [2021-06-05 22:32:55,398 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:32:55,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-06-05 22:32:55,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 143. [2021-06-05 22:32:55,436 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) [2021-06-05 22:32:55,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 417 transitions. [2021-06-05 22:32:55,438 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 417 transitions. Word has length 16 [2021-06-05 22:32:55,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:55,439 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 417 transitions. [2021-06-05 22:32:55,439 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) [2021-06-05 22:32:55,439 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 417 transitions. [2021-06-05 22:32:55,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:32:55,440 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:55,440 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:55,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 22:32:55,441 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:32:55,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:55,441 INFO L82 PathProgramCache]: Analyzing trace with hash 890214852, now seen corresponding path program 2 times [2021-06-05 22:32:55,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:55,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71155103] [2021-06-05 22:32:55,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:55,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:55,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:55,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:55,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71155103] [2021-06-05 22:32:55,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71155103] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:32:55,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:32:55,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 22:32:55,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290298733] [2021-06-05 22:32:55,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:32:55,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:55,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:32:55,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:32:55,500 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) [2021-06-05 22:32:55,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:55,543 INFO L93 Difference]: Finished difference Result 262 states and 765 transitions. [2021-06-05 22:32:55,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:32:55,545 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 [2021-06-05 22:32:55,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:55,547 INFO L225 Difference]: With dead ends: 262 [2021-06-05 22:32:55,547 INFO L226 Difference]: Without dead ends: 256 [2021-06-05 22:32:55,548 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:32:55,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-06-05 22:32:55,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 145. [2021-06-05 22:32:55,558 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) [2021-06-05 22:32:55,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 421 transitions. [2021-06-05 22:32:55,559 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 421 transitions. Word has length 16 [2021-06-05 22:32:55,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:55,559 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 421 transitions. [2021-06-05 22:32:55,559 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) [2021-06-05 22:32:55,560 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 421 transitions. [2021-06-05 22:32:55,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:32:55,561 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:55,561 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:55,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 22:32:55,561 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:32:55,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:55,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1702344252, now seen corresponding path program 1 times [2021-06-05 22:32:55,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:55,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299207208] [2021-06-05 22:32:55,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:55,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:55,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:55,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:55,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299207208] [2021-06-05 22:32:55,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299207208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:55,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606274558] [2021-06-05 22:32:55,593 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 [2021-06-05 22:32:55,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:55,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 22:32:55,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:55,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:55,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606274558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:55,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:55,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 22:32:55,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519931422] [2021-06-05 22:32:55,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:32:55,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:55,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:32:55,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:32:55,790 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) [2021-06-05 22:32:55,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:55,864 INFO L93 Difference]: Finished difference Result 199 states and 578 transitions. [2021-06-05 22:32:55,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:32:55,865 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 [2021-06-05 22:32:55,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:55,868 INFO L225 Difference]: With dead ends: 199 [2021-06-05 22:32:55,868 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 22:32:55,869 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:32:55,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 22:32:55,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 149. [2021-06-05 22:32:55,877 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) [2021-06-05 22:32:55,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 445 transitions. [2021-06-05 22:32:55,878 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 445 transitions. Word has length 18 [2021-06-05 22:32:55,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:55,878 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 445 transitions. [2021-06-05 22:32:55,878 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) [2021-06-05 22:32:55,878 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 445 transitions. [2021-06-05 22:32:55,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:32:55,879 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:55,879 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:56,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 22:32:56,097 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:32:56,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:56,097 INFO L82 PathProgramCache]: Analyzing trace with hash -735916285, now seen corresponding path program 1 times [2021-06-05 22:32:56,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:56,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413831749] [2021-06-05 22:32:56,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:56,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:56,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:56,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413831749] [2021-06-05 22:32:56,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413831749] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:32:56,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:32:56,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:32:56,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355289404] [2021-06-05 22:32:56,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:32:56,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:56,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:32:56,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:32:56,148 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) [2021-06-05 22:32:56,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:56,212 INFO L93 Difference]: Finished difference Result 246 states and 702 transitions. [2021-06-05 22:32:56,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:32:56,213 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 [2021-06-05 22:32:56,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:56,214 INFO L225 Difference]: With dead ends: 246 [2021-06-05 22:32:56,214 INFO L226 Difference]: Without dead ends: 214 [2021-06-05 22:32:56,215 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:32:56,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-06-05 22:32:56,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 164. [2021-06-05 22:32:56,235 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) [2021-06-05 22:32:56,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 473 transitions. [2021-06-05 22:32:56,235 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 473 transitions. Word has length 18 [2021-06-05 22:32:56,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:56,236 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 473 transitions. [2021-06-05 22:32:56,236 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) [2021-06-05 22:32:56,236 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 473 transitions. [2021-06-05 22:32:56,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:32:56,237 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:56,237 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:56,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 22:32:56,237 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:32:56,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:56,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1382578898, now seen corresponding path program 1 times [2021-06-05 22:32:56,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:56,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739835794] [2021-06-05 22:32:56,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:56,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:56,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:56,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:56,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739835794] [2021-06-05 22:32:56,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739835794] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:32:56,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:32:56,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:32:56,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079014411] [2021-06-05 22:32:56,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 22:32:56,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:56,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 22:32:56,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:32:56,270 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) [2021-06-05 22:32:56,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:56,281 INFO L93 Difference]: Finished difference Result 153 states and 416 transitions. [2021-06-05 22:32:56,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 22:32:56,282 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 [2021-06-05 22:32:56,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:56,282 INFO L225 Difference]: With dead ends: 153 [2021-06-05 22:32:56,283 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 22:32:56,283 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:32:56,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 22:32:56,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2021-06-05 22:32:56,294 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) [2021-06-05 22:32:56,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 369 transitions. [2021-06-05 22:32:56,294 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 369 transitions. Word has length 18 [2021-06-05 22:32:56,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:56,295 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 369 transitions. [2021-06-05 22:32:56,295 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) [2021-06-05 22:32:56,295 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 369 transitions. [2021-06-05 22:32:56,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:32:56,299 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:56,300 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:56,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 22:32:56,300 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:32:56,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:56,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1747969668, now seen corresponding path program 2 times [2021-06-05 22:32:56,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:56,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422346687] [2021-06-05 22:32:56,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:56,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:56,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:56,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:56,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422346687] [2021-06-05 22:32:56,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422346687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:56,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358760868] [2021-06-05 22:32:56,351 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 [2021-06-05 22:32:56,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:32:56,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:56,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 22:32:56,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:56,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:56,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358760868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:56,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:56,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 22:32:56,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956219681] [2021-06-05 22:32:56,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:32:56,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:56,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:32:56,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:32:56,481 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) [2021-06-05 22:32:56,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:56,522 INFO L93 Difference]: Finished difference Result 205 states and 550 transitions. [2021-06-05 22:32:56,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:32:56,522 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 [2021-06-05 22:32:56,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:56,524 INFO L225 Difference]: With dead ends: 205 [2021-06-05 22:32:56,524 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 22:32:56,524 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:32:56,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 22:32:56,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 136. [2021-06-05 22:32:56,528 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) [2021-06-05 22:32:56,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 383 transitions. [2021-06-05 22:32:56,529 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 383 transitions. Word has length 18 [2021-06-05 22:32:56,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:56,529 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 383 transitions. [2021-06-05 22:32:56,529 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) [2021-06-05 22:32:56,529 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 383 transitions. [2021-06-05 22:32:56,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:32:56,530 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:56,530 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:56,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:56,747 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:32:56,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:56,747 INFO L82 PathProgramCache]: Analyzing trace with hash -141666181, now seen corresponding path program 2 times [2021-06-05 22:32:56,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:56,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311865983] [2021-06-05 22:32:56,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:56,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:56,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:56,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:56,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311865983] [2021-06-05 22:32:56,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311865983] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:32:56,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:32:56,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:32:56,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35249258] [2021-06-05 22:32:56,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:32:56,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:56,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:32:56,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:32:56,771 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) [2021-06-05 22:32:56,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:56,839 INFO L93 Difference]: Finished difference Result 253 states and 641 transitions. [2021-06-05 22:32:56,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:32:56,839 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 [2021-06-05 22:32:56,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:56,840 INFO L225 Difference]: With dead ends: 253 [2021-06-05 22:32:56,841 INFO L226 Difference]: Without dead ends: 244 [2021-06-05 22:32:56,841 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:32:56,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-05 22:32:56,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 160. [2021-06-05 22:32:56,844 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) [2021-06-05 22:32:56,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 447 transitions. [2021-06-05 22:32:56,845 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 447 transitions. Word has length 18 [2021-06-05 22:32:56,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:56,845 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 447 transitions. [2021-06-05 22:32:56,845 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) [2021-06-05 22:32:56,845 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 447 transitions. [2021-06-05 22:32:56,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:32:56,846 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:56,846 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:56,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 22:32:56,846 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:32:56,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:56,846 INFO L82 PathProgramCache]: Analyzing trace with hash -2044687976, now seen corresponding path program 3 times [2021-06-05 22:32:56,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:56,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257472688] [2021-06-05 22:32:56,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:56,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:56,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:56,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:56,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257472688] [2021-06-05 22:32:56,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257472688] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:32:56,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:32:56,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:32:56,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813762074] [2021-06-05 22:32:56,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:32:56,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:56,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:32:56,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:32:56,865 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) [2021-06-05 22:32:56,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:56,910 INFO L93 Difference]: Finished difference Result 211 states and 560 transitions. [2021-06-05 22:32:56,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:32:56,910 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 [2021-06-05 22:32:56,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:56,911 INFO L225 Difference]: With dead ends: 211 [2021-06-05 22:32:56,911 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 22:32:56,912 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:32:56,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 22:32:56,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 160. [2021-06-05 22:32:56,915 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) [2021-06-05 22:32:56,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 444 transitions. [2021-06-05 22:32:56,916 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 444 transitions. Word has length 18 [2021-06-05 22:32:56,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:56,916 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 444 transitions. [2021-06-05 22:32:56,916 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) [2021-06-05 22:32:56,916 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 444 transitions. [2021-06-05 22:32:56,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:32:56,917 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:56,917 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:56,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 22:32:56,917 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:32:56,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:56,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1877852891, now seen corresponding path program 3 times [2021-06-05 22:32:56,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:56,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927118719] [2021-06-05 22:32:56,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:56,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:56,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:56,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:56,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927118719] [2021-06-05 22:32:56,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927118719] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:32:56,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:32:56,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:32:56,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411056828] [2021-06-05 22:32:56,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:32:56,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:56,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:32:56,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:32:56,943 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) [2021-06-05 22:32:56,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:56,987 INFO L93 Difference]: Finished difference Result 190 states and 515 transitions. [2021-06-05 22:32:56,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:32:56,987 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 [2021-06-05 22:32:56,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:56,988 INFO L225 Difference]: With dead ends: 190 [2021-06-05 22:32:56,988 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 22:32:56,988 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:32:56,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 22:32:56,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 142. [2021-06-05 22:32:56,991 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) [2021-06-05 22:32:56,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 396 transitions. [2021-06-05 22:32:56,992 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 396 transitions. Word has length 18 [2021-06-05 22:32:56,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:56,992 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 396 transitions. [2021-06-05 22:32:56,992 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) [2021-06-05 22:32:56,992 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 396 transitions. [2021-06-05 22:32:56,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:32:56,993 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:56,993 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:56,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 22:32:56,993 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:32:56,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:56,993 INFO L82 PathProgramCache]: Analyzing trace with hash -663824830, now seen corresponding path program 4 times [2021-06-05 22:32:56,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:56,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053547698] [2021-06-05 22:32:56,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:57,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:57,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:57,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053547698] [2021-06-05 22:32:57,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053547698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:57,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407709476] [2021-06-05 22:32:57,014 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 [2021-06-05 22:32:57,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:32:57,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:57,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 22:32:57,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:57,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:57,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407709476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:57,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:57,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 22:32:57,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960526631] [2021-06-05 22:32:57,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:32:57,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:57,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:32:57,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:32:57,121 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) [2021-06-05 22:32:57,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:57,161 INFO L93 Difference]: Finished difference Result 193 states and 511 transitions. [2021-06-05 22:32:57,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:32:57,161 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 [2021-06-05 22:32:57,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:57,162 INFO L225 Difference]: With dead ends: 193 [2021-06-05 22:32:57,162 INFO L226 Difference]: Without dead ends: 193 [2021-06-05 22:32:57,162 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:32:57,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-05 22:32:57,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2021-06-05 22:32:57,165 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) [2021-06-05 22:32:57,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 396 transitions. [2021-06-05 22:32:57,166 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 396 transitions. Word has length 18 [2021-06-05 22:32:57,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:57,166 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 396 transitions. [2021-06-05 22:32:57,166 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) [2021-06-05 22:32:57,166 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 396 transitions. [2021-06-05 22:32:57,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:32:57,167 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:57,167 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:57,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 22:32:57,381 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:32:57,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:57,381 INFO L82 PathProgramCache]: Analyzing trace with hash 810916037, now seen corresponding path program 4 times [2021-06-05 22:32:57,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:57,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463851889] [2021-06-05 22:32:57,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:57,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:57,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:57,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:57,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463851889] [2021-06-05 22:32:57,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463851889] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:32:57,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:32:57,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:32:57,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261916902] [2021-06-05 22:32:57,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:32:57,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:57,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:32:57,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:32:57,399 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) [2021-06-05 22:32:57,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:57,454 INFO L93 Difference]: Finished difference Result 197 states and 512 transitions. [2021-06-05 22:32:57,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:32:57,455 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 [2021-06-05 22:32:57,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:57,456 INFO L225 Difference]: With dead ends: 197 [2021-06-05 22:32:57,456 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 22:32:57,456 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:32:57,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 22:32:57,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 164. [2021-06-05 22:32:57,460 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) [2021-06-05 22:32:57,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 455 transitions. [2021-06-05 22:32:57,460 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 455 transitions. Word has length 18 [2021-06-05 22:32:57,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:57,461 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 455 transitions. [2021-06-05 22:32:57,461 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) [2021-06-05 22:32:57,461 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 455 transitions. [2021-06-05 22:32:57,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:32:57,461 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:57,461 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:57,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 22:32:57,461 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:32:57,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:57,462 INFO L82 PathProgramCache]: Analyzing trace with hash -951885686, now seen corresponding path program 5 times [2021-06-05 22:32:57,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:57,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511216939] [2021-06-05 22:32:57,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:57,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:57,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:57,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:57,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511216939] [2021-06-05 22:32:57,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511216939] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:32:57,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:32:57,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:32:57,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100251821] [2021-06-05 22:32:57,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:32:57,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:57,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:32:57,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:32:57,493 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) [2021-06-05 22:32:57,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:57,563 INFO L93 Difference]: Finished difference Result 248 states and 641 transitions. [2021-06-05 22:32:57,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:32:57,563 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 [2021-06-05 22:32:57,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:57,564 INFO L225 Difference]: With dead ends: 248 [2021-06-05 22:32:57,564 INFO L226 Difference]: Without dead ends: 245 [2021-06-05 22:32:57,564 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:32:57,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-05 22:32:57,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 164. [2021-06-05 22:32:57,568 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) [2021-06-05 22:32:57,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 452 transitions. [2021-06-05 22:32:57,568 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 452 transitions. Word has length 18 [2021-06-05 22:32:57,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:57,568 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 452 transitions. [2021-06-05 22:32:57,568 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) [2021-06-05 22:32:57,568 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 452 transitions. [2021-06-05 22:32:57,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:32:57,569 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:57,569 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:57,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 22:32:57,569 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:32:57,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:57,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1324312115, now seen corresponding path program 5 times [2021-06-05 22:32:57,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:57,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537043570] [2021-06-05 22:32:57,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:57,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:57,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:57,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:57,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537043570] [2021-06-05 22:32:57,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537043570] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:32:57,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:32:57,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:32:57,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763331247] [2021-06-05 22:32:57,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:32:57,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:57,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:32:57,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:32:57,585 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) [2021-06-05 22:32:57,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:57,618 INFO L93 Difference]: Finished difference Result 190 states and 503 transitions. [2021-06-05 22:32:57,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:32:57,619 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 [2021-06-05 22:32:57,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:57,619 INFO L225 Difference]: With dead ends: 190 [2021-06-05 22:32:57,619 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 22:32:57,619 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:32:57,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 22:32:57,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 161. [2021-06-05 22:32:57,622 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) [2021-06-05 22:32:57,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 444 transitions. [2021-06-05 22:32:57,623 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 444 transitions. Word has length 18 [2021-06-05 22:32:57,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:57,623 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 444 transitions. [2021-06-05 22:32:57,623 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) [2021-06-05 22:32:57,623 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 444 transitions. [2021-06-05 22:32:57,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:32:57,624 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:57,624 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:57,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 22:32:57,624 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:32:57,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:57,624 INFO L82 PathProgramCache]: Analyzing trace with hash 11936556, now seen corresponding path program 6 times [2021-06-05 22:32:57,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:57,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50867664] [2021-06-05 22:32:57,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:57,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:57,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:57,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:57,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50867664] [2021-06-05 22:32:57,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50867664] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:32:57,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:32:57,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:32:57,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123909907] [2021-06-05 22:32:57,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:32:57,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:57,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:32:57,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:32:57,645 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) [2021-06-05 22:32:57,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:57,687 INFO L93 Difference]: Finished difference Result 164 states and 446 transitions. [2021-06-05 22:32:57,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:32:57,687 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 [2021-06-05 22:32:57,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:57,688 INFO L225 Difference]: With dead ends: 164 [2021-06-05 22:32:57,688 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 22:32:57,688 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:32:57,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 22:32:57,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-06-05 22:32:57,691 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) [2021-06-05 22:32:57,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 442 transitions. [2021-06-05 22:32:57,691 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 442 transitions. Word has length 18 [2021-06-05 22:32:57,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:57,691 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 442 transitions. [2021-06-05 22:32:57,692 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) [2021-06-05 22:32:57,692 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 442 transitions. [2021-06-05 22:32:57,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:32:57,693 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:57,693 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:57,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 22:32:57,693 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:32:57,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:57,693 INFO L82 PathProgramCache]: Analyzing trace with hash 459545933, now seen corresponding path program 6 times [2021-06-05 22:32:57,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:57,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451186305] [2021-06-05 22:32:57,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:57,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:57,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:57,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:57,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451186305] [2021-06-05 22:32:57,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451186305] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:32:57,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:32:57,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:32:57,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172446168] [2021-06-05 22:32:57,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:32:57,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:57,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:32:57,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:32:57,717 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) [2021-06-05 22:32:57,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:57,752 INFO L93 Difference]: Finished difference Result 153 states and 422 transitions. [2021-06-05 22:32:57,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:32:57,753 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 [2021-06-05 22:32:57,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:57,753 INFO L225 Difference]: With dead ends: 153 [2021-06-05 22:32:57,753 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 22:32:57,755 INFO L810 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 [2021-06-05 22:32:57,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 22:32:57,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 135. [2021-06-05 22:32:57,757 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) [2021-06-05 22:32:57,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 374 transitions. [2021-06-05 22:32:57,758 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 374 transitions. Word has length 18 [2021-06-05 22:32:57,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:57,758 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 374 transitions. [2021-06-05 22:32:57,758 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) [2021-06-05 22:32:57,758 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 374 transitions. [2021-06-05 22:32:57,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:32:57,758 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:57,758 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:57,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-05 22:32:57,759 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:32:57,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:57,759 INFO L82 PathProgramCache]: Analyzing trace with hash 442648773, now seen corresponding path program 1 times [2021-06-05 22:32:57,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:57,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622077103] [2021-06-05 22:32:57,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:57,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:57,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:57,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:57,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622077103] [2021-06-05 22:32:57,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622077103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:57,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37051329] [2021-06-05 22:32:57,861 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 [2021-06-05 22:32:57,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:57,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:32:57,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:58,021 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 [2021-06-05 22:32:58,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:58,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:58,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:58,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:10 [2021-06-05 22:32:58,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:58,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37051329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:58,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:58,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 22:32:58,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160476068] [2021-06-05 22:32:58,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:32:58,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:58,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:32:58,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:32:58,064 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) [2021-06-05 22:32:58,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:58,442 INFO L93 Difference]: Finished difference Result 382 states and 1086 transitions. [2021-06-05 22:32:58,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:32:58,442 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 [2021-06-05 22:32:58,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:58,444 INFO L225 Difference]: With dead ends: 382 [2021-06-05 22:32:58,444 INFO L226 Difference]: Without dead ends: 372 [2021-06-05 22:32:58,444 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 207.3ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:32:58,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-06-05 22:32:58,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 186. [2021-06-05 22:32:58,448 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) [2021-06-05 22:32:58,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 521 transitions. [2021-06-05 22:32:58,449 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 521 transitions. Word has length 20 [2021-06-05 22:32:58,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:58,449 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 521 transitions. [2021-06-05 22:32:58,449 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) [2021-06-05 22:32:58,449 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 521 transitions. [2021-06-05 22:32:58,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:32:58,449 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:58,450 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:58,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:58,667 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:32:58,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:58,667 INFO L82 PathProgramCache]: Analyzing trace with hash 600946541, now seen corresponding path program 2 times [2021-06-05 22:32:58,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:58,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921003973] [2021-06-05 22:32:58,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:58,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:58,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:58,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:58,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921003973] [2021-06-05 22:32:58,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921003973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:58,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051285267] [2021-06-05 22:32:58,763 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 [2021-06-05 22:32:58,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:32:58,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:58,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:32:58,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:58,992 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:58,992 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 [2021-06-05 22:32:58,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:32:59,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:59,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:59,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-06-05 22:32:59,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:59,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051285267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:59,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:59,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 22:32:59,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794612094] [2021-06-05 22:32:59,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:32:59,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:59,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:32:59,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:32:59,073 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) [2021-06-05 22:32:59,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:59,942 INFO L93 Difference]: Finished difference Result 399 states and 1155 transitions. [2021-06-05 22:32:59,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:32:59,943 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 [2021-06-05 22:32:59,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:59,944 INFO L225 Difference]: With dead ends: 399 [2021-06-05 22:32:59,945 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 22:32:59,945 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 647.8ms TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:32:59,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 22:32:59,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 189. [2021-06-05 22:32:59,949 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) [2021-06-05 22:32:59,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 530 transitions. [2021-06-05 22:32:59,950 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 530 transitions. Word has length 20 [2021-06-05 22:32:59,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:59,950 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 530 transitions. [2021-06-05 22:32:59,950 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) [2021-06-05 22:32:59,950 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 530 transitions. [2021-06-05 22:32:59,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:32:59,951 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:59,951 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:00,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 22:33:00,172 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:00,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:00,172 INFO L82 PathProgramCache]: Analyzing trace with hash 424405109, now seen corresponding path program 3 times [2021-06-05 22:33:00,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:00,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321956845] [2021-06-05 22:33:00,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:00,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:00,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:00,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:00,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321956845] [2021-06-05 22:33:00,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321956845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:00,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963602424] [2021-06-05 22:33:00,280 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 [2021-06-05 22:33:00,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:33:00,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:00,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:33:00,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:00,371 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:00,371 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 [2021-06-05 22:33:00,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:33:00,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:00,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:00,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:33:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:00,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963602424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:00,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:00,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 22:33:00,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235640355] [2021-06-05 22:33:00,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:33:00,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:00,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:33:00,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:33:00,493 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) [2021-06-05 22:33:01,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:01,245 INFO L93 Difference]: Finished difference Result 363 states and 1048 transitions. [2021-06-05 22:33:01,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:33:01,245 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 [2021-06-05 22:33:01,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:01,247 INFO L225 Difference]: With dead ends: 363 [2021-06-05 22:33:01,247 INFO L226 Difference]: Without dead ends: 353 [2021-06-05 22:33:01,247 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 620.1ms TimeCoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:33:01,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-05 22:33:01,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 192. [2021-06-05 22:33:01,251 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) [2021-06-05 22:33:01,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 539 transitions. [2021-06-05 22:33:01,251 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 539 transitions. Word has length 20 [2021-06-05 22:33:01,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:01,251 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 539 transitions. [2021-06-05 22:33:01,251 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) [2021-06-05 22:33:01,251 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 539 transitions. [2021-06-05 22:33:01,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:01,252 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:01,252 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:01,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:01,465 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:01,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:01,465 INFO L82 PathProgramCache]: Analyzing trace with hash -409333331, now seen corresponding path program 4 times [2021-06-05 22:33:01,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:01,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675227520] [2021-06-05 22:33:01,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:01,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:01,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:01,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:01,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675227520] [2021-06-05 22:33:01,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675227520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:01,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31855827] [2021-06-05 22:33:01,569 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 [2021-06-05 22:33:01,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:33:01,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:01,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:33:01,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:01,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:01,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-05 22:33:01,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:01,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:01,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:01,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:33:01,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:01,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31855827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:01,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:01,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:33:01,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224158141] [2021-06-05 22:33:01,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:33:01,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:01,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:33:01,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:33:01,739 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) [2021-06-05 22:33:02,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:02,162 INFO L93 Difference]: Finished difference Result 310 states and 882 transitions. [2021-06-05 22:33:02,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:33:02,163 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 [2021-06-05 22:33:02,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:02,164 INFO L225 Difference]: With dead ends: 310 [2021-06-05 22:33:02,164 INFO L226 Difference]: Without dead ends: 298 [2021-06-05 22:33:02,164 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 304.6ms TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:33:02,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-06-05 22:33:02,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 210. [2021-06-05 22:33:02,168 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) [2021-06-05 22:33:02,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 601 transitions. [2021-06-05 22:33:02,169 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 601 transitions. Word has length 20 [2021-06-05 22:33:02,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:02,169 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 601 transitions. [2021-06-05 22:33:02,169 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) [2021-06-05 22:33:02,169 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 601 transitions. [2021-06-05 22:33:02,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:02,169 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:02,169 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:02,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:02,390 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:02,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:02,391 INFO L82 PathProgramCache]: Analyzing trace with hash -908838833, now seen corresponding path program 1 times [2021-06-05 22:33:02,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:02,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044243319] [2021-06-05 22:33:02,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:02,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:02,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:02,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:02,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044243319] [2021-06-05 22:33:02,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044243319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:02,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630546164] [2021-06-05 22:33:02,461 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 [2021-06-05 22:33:02,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:02,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:33:02,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:02,578 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 [2021-06-05 22:33:02,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:02,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:02,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:02,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:10 [2021-06-05 22:33:02,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:02,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630546164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:02,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:02,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 22:33:02,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882198339] [2021-06-05 22:33:02,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:33:02,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:02,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:33:02,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:33:02,615 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) [2021-06-05 22:33:02,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:02,959 INFO L93 Difference]: Finished difference Result 423 states and 1216 transitions. [2021-06-05 22:33:02,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:33:02,959 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 [2021-06-05 22:33:02,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:02,961 INFO L225 Difference]: With dead ends: 423 [2021-06-05 22:33:02,961 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 22:33:02,961 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 179.1ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:33:02,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 22:33:02,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 216. [2021-06-05 22:33:02,965 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) [2021-06-05 22:33:02,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 621 transitions. [2021-06-05 22:33:02,966 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 621 transitions. Word has length 20 [2021-06-05 22:33:02,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:02,966 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 621 transitions. [2021-06-05 22:33:02,966 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) [2021-06-05 22:33:02,966 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 621 transitions. [2021-06-05 22:33:02,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:02,966 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:02,966 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:03,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 22:33:03,185 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:03,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:03,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1199871497, now seen corresponding path program 2 times [2021-06-05 22:33:03,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:03,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247306064] [2021-06-05 22:33:03,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:03,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:03,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:03,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247306064] [2021-06-05 22:33:03,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247306064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:03,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072626103] [2021-06-05 22:33:03,257 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 [2021-06-05 22:33:03,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:03,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:03,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:33:03,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:03,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:03,410 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 [2021-06-05 22:33:03,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:03,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:03,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:03,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 22:33:03,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:03,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072626103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:03,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:03,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:33:03,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350137796] [2021-06-05 22:33:03,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:33:03,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:03,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:33:03,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:33:03,452 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) [2021-06-05 22:33:03,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:03,716 INFO L93 Difference]: Finished difference Result 332 states and 961 transitions. [2021-06-05 22:33:03,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:33:03,716 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 [2021-06-05 22:33:03,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:03,717 INFO L225 Difference]: With dead ends: 332 [2021-06-05 22:33:03,717 INFO L226 Difference]: Without dead ends: 323 [2021-06-05 22:33:03,718 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 172.6ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:33:03,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-05 22:33:03,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 219. [2021-06-05 22:33:03,721 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) [2021-06-05 22:33:03,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 631 transitions. [2021-06-05 22:33:03,722 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 631 transitions. Word has length 20 [2021-06-05 22:33:03,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:03,722 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 631 transitions. [2021-06-05 22:33:03,722 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) [2021-06-05 22:33:03,722 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 631 transitions. [2021-06-05 22:33:03,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:03,722 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:03,722 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:03,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:03,937 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:03,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:03,937 INFO L82 PathProgramCache]: Analyzing trace with hash 2066945939, now seen corresponding path program 3 times [2021-06-05 22:33:03,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:03,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409378617] [2021-06-05 22:33:03,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:03,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:04,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:04,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409378617] [2021-06-05 22:33:04,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409378617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:04,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005398309] [2021-06-05 22:33:04,004 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 [2021-06-05 22:33:04,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:33:04,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:04,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:33:04,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:04,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:04,136 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 [2021-06-05 22:33:04,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:33:04,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:04,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:04,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-06-05 22:33:04,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:04,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005398309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:04,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:04,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 22:33:04,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88035382] [2021-06-05 22:33:04,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:33:04,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:04,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:33:04,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:33:04,263 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) [2021-06-05 22:33:04,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:04,751 INFO L93 Difference]: Finished difference Result 343 states and 998 transitions. [2021-06-05 22:33:04,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:33:04,751 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 [2021-06-05 22:33:04,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:04,753 INFO L225 Difference]: With dead ends: 343 [2021-06-05 22:33:04,753 INFO L226 Difference]: Without dead ends: 334 [2021-06-05 22:33:04,753 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 383.9ms TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:33:04,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-06-05 22:33:04,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 222. [2021-06-05 22:33:04,757 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) [2021-06-05 22:33:04,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 641 transitions. [2021-06-05 22:33:04,757 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 641 transitions. Word has length 20 [2021-06-05 22:33:04,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:04,757 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 641 transitions. [2021-06-05 22:33:04,757 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) [2021-06-05 22:33:04,757 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 641 transitions. [2021-06-05 22:33:04,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:04,758 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:04,758 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:04,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:04,973 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:04,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:04,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1904435179, now seen corresponding path program 4 times [2021-06-05 22:33:04,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:04,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447646] [2021-06-05 22:33:04,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:04,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:05,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:05,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:05,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447646] [2021-06-05 22:33:05,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:05,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568634875] [2021-06-05 22:33:05,028 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 [2021-06-05 22:33:05,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:33:05,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:05,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:33:05,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:05,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:05,121 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 [2021-06-05 22:33:05,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:05,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:05,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:05,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:33:05,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:05,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568634875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:05,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:05,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:33:05,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837874721] [2021-06-05 22:33:05,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:33:05,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:05,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:33:05,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:33:05,170 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) [2021-06-05 22:33:05,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:05,415 INFO L93 Difference]: Finished difference Result 318 states and 927 transitions. [2021-06-05 22:33:05,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:33:05,416 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 [2021-06-05 22:33:05,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:05,417 INFO L225 Difference]: With dead ends: 318 [2021-06-05 22:33:05,417 INFO L226 Difference]: Without dead ends: 307 [2021-06-05 22:33:05,417 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 179.6ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:33:05,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-06-05 22:33:05,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 224. [2021-06-05 22:33:05,420 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) [2021-06-05 22:33:05,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 648 transitions. [2021-06-05 22:33:05,421 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 648 transitions. Word has length 20 [2021-06-05 22:33:05,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:05,421 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 648 transitions. [2021-06-05 22:33:05,421 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) [2021-06-05 22:33:05,421 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 648 transitions. [2021-06-05 22:33:05,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:05,422 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:05,422 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:05,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 22:33:05,638 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:05,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:05,639 INFO L82 PathProgramCache]: Analyzing trace with hash -453703043, now seen corresponding path program 5 times [2021-06-05 22:33:05,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:05,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305605868] [2021-06-05 22:33:05,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:05,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:05,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:05,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:05,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305605868] [2021-06-05 22:33:05,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305605868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:05,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94877340] [2021-06-05 22:33:05,719 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 [2021-06-05 22:33:05,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:05,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:05,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:33:05,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:05,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:05,847 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 [2021-06-05 22:33:05,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:05,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:05,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:05,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 22:33:05,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:05,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94877340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:05,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:05,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:33:05,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726782975] [2021-06-05 22:33:05,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:33:05,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:05,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:33:05,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:33:05,886 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) [2021-06-05 22:33:06,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:06,123 INFO L93 Difference]: Finished difference Result 328 states and 946 transitions. [2021-06-05 22:33:06,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:33:06,125 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 [2021-06-05 22:33:06,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:06,126 INFO L225 Difference]: With dead ends: 328 [2021-06-05 22:33:06,126 INFO L226 Difference]: Without dead ends: 318 [2021-06-05 22:33:06,127 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 162.2ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:33:06,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-05 22:33:06,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 224. [2021-06-05 22:33:06,130 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) [2021-06-05 22:33:06,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 648 transitions. [2021-06-05 22:33:06,131 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 648 transitions. Word has length 20 [2021-06-05 22:33:06,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:06,131 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 648 transitions. [2021-06-05 22:33:06,131 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) [2021-06-05 22:33:06,131 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 648 transitions. [2021-06-05 22:33:06,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:06,132 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:06,132 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:06,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:06,343 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:06,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:06,344 INFO L82 PathProgramCache]: Analyzing trace with hash -236278157, now seen corresponding path program 6 times [2021-06-05 22:33:06,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:06,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240897437] [2021-06-05 22:33:06,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:06,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:06,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:06,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:06,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240897437] [2021-06-05 22:33:06,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240897437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:06,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026357898] [2021-06-05 22:33:06,433 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 [2021-06-05 22:33:06,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:33:06,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:06,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:33:06,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:06,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:06,548 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 [2021-06-05 22:33:06,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:33:06,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:06,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:06,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:33:06,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:06,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026357898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:06,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:06,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 22:33:06,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498938689] [2021-06-05 22:33:06,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:33:06,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:06,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:33:06,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:33:06,675 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) [2021-06-05 22:33:07,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:07,520 INFO L93 Difference]: Finished difference Result 462 states and 1347 transitions. [2021-06-05 22:33:07,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:33:07,521 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 [2021-06-05 22:33:07,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:07,522 INFO L225 Difference]: With dead ends: 462 [2021-06-05 22:33:07,522 INFO L226 Difference]: Without dead ends: 442 [2021-06-05 22:33:07,523 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 679.1ms TimeCoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:33:07,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-06-05 22:33:07,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 235. [2021-06-05 22:33:07,527 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) [2021-06-05 22:33:07,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 694 transitions. [2021-06-05 22:33:07,527 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 694 transitions. Word has length 20 [2021-06-05 22:33:07,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:07,527 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 694 transitions. [2021-06-05 22:33:07,527 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) [2021-06-05 22:33:07,528 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 694 transitions. [2021-06-05 22:33:07,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:07,528 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:07,528 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:07,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 22:33:07,737 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:07,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:07,738 INFO L82 PathProgramCache]: Analyzing trace with hash 188465799, now seen corresponding path program 5 times [2021-06-05 22:33:07,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:07,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442256444] [2021-06-05 22:33:07,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:07,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:07,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:07,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:07,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442256444] [2021-06-05 22:33:07,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442256444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:07,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146506299] [2021-06-05 22:33:07,804 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 [2021-06-05 22:33:07,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:07,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:07,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:33:07,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:07,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:07,960 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 [2021-06-05 22:33:07,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:07,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:07,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:07,967 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 22:33:07,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:07,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146506299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:07,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:07,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:33:07,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191495065] [2021-06-05 22:33:07,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:33:07,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:07,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:33:07,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:33:07,994 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) [2021-06-05 22:33:08,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:08,150 INFO L93 Difference]: Finished difference Result 327 states and 955 transitions. [2021-06-05 22:33:08,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:33:08,150 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 [2021-06-05 22:33:08,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:08,151 INFO L225 Difference]: With dead ends: 327 [2021-06-05 22:33:08,151 INFO L226 Difference]: Without dead ends: 318 [2021-06-05 22:33:08,151 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 152.3ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:33:08,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-05 22:33:08,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 238. [2021-06-05 22:33:08,157 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) [2021-06-05 22:33:08,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 704 transitions. [2021-06-05 22:33:08,158 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 704 transitions. Word has length 20 [2021-06-05 22:33:08,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:08,158 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 704 transitions. [2021-06-05 22:33:08,158 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) [2021-06-05 22:33:08,158 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 704 transitions. [2021-06-05 22:33:08,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:08,159 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:08,159 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:08,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:08,362 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:08,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:08,362 INFO L82 PathProgramCache]: Analyzing trace with hash -839684061, now seen corresponding path program 6 times [2021-06-05 22:33:08,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:08,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721241600] [2021-06-05 22:33:08,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:08,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:08,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:08,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:08,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721241600] [2021-06-05 22:33:08,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721241600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:08,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623640402] [2021-06-05 22:33:08,417 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 [2021-06-05 22:33:08,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:33:08,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:08,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:33:08,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:08,506 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:08,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-05 22:33:08,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:33:08,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:08,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:08,521 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-06-05 22:33:08,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:08,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623640402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:08,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:08,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 22:33:08,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908592561] [2021-06-05 22:33:08,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:33:08,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:08,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:33:08,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:33:08,616 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) [2021-06-05 22:33:09,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:09,048 INFO L93 Difference]: Finished difference Result 341 states and 1001 transitions. [2021-06-05 22:33:09,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:33:09,048 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 [2021-06-05 22:33:09,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:09,049 INFO L225 Difference]: With dead ends: 341 [2021-06-05 22:33:09,049 INFO L226 Difference]: Without dead ends: 332 [2021-06-05 22:33:09,050 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 412.4ms TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:33:09,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-05 22:33:09,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 241. [2021-06-05 22:33:09,053 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) [2021-06-05 22:33:09,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 714 transitions. [2021-06-05 22:33:09,054 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 714 transitions. Word has length 20 [2021-06-05 22:33:09,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:09,054 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 714 transitions. [2021-06-05 22:33:09,054 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) [2021-06-05 22:33:09,054 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 714 transitions. [2021-06-05 22:33:09,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:09,054 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:09,054 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:09,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 22:33:09,273 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:09,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:09,273 INFO L82 PathProgramCache]: Analyzing trace with hash -516097883, now seen corresponding path program 7 times [2021-06-05 22:33:09,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:09,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220340347] [2021-06-05 22:33:09,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:09,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:09,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:09,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:09,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220340347] [2021-06-05 22:33:09,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220340347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:09,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619613234] [2021-06-05 22:33:09,359 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 [2021-06-05 22:33:09,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:09,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:33:09,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:09,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:09,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-05 22:33:09,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:09,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:09,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:09,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:33:09,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:09,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619613234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:09,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:09,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:33:09,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112005495] [2021-06-05 22:33:09,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:33:09,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:09,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:33:09,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:33:09,777 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) [2021-06-05 22:33:09,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:09,908 INFO L93 Difference]: Finished difference Result 310 states and 911 transitions. [2021-06-05 22:33:09,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:33:09,909 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 [2021-06-05 22:33:09,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:09,910 INFO L225 Difference]: With dead ends: 310 [2021-06-05 22:33:09,910 INFO L226 Difference]: Without dead ends: 299 [2021-06-05 22:33:09,910 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 208.7ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:33:09,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-06-05 22:33:09,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 235. [2021-06-05 22:33:09,913 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) [2021-06-05 22:33:09,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 694 transitions. [2021-06-05 22:33:09,914 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 694 transitions. Word has length 20 [2021-06-05 22:33:09,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:09,914 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 694 transitions. [2021-06-05 22:33:09,914 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) [2021-06-05 22:33:09,914 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 694 transitions. [2021-06-05 22:33:09,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:09,915 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:09,915 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:10,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 22:33:10,130 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:10,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:10,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1628624025, now seen corresponding path program 7 times [2021-06-05 22:33:10,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:10,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845343556] [2021-06-05 22:33:10,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:10,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:10,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:10,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:10,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845343556] [2021-06-05 22:33:10,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845343556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:10,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241017091] [2021-06-05 22:33:10,228 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 [2021-06-05 22:33:10,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:10,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:33:10,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:10,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:10,305 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 [2021-06-05 22:33:10,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:10,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:10,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:10,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:33:10,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:10,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241017091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:10,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:10,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:33:10,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501848351] [2021-06-05 22:33:10,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:33:10,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:10,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:33:10,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:33:10,368 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) [2021-06-05 22:33:10,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:10,586 INFO L93 Difference]: Finished difference Result 350 states and 1025 transitions. [2021-06-05 22:33:10,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:33:10,586 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 [2021-06-05 22:33:10,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:10,588 INFO L225 Difference]: With dead ends: 350 [2021-06-05 22:33:10,588 INFO L226 Difference]: Without dead ends: 340 [2021-06-05 22:33:10,588 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 182.2ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:33:10,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-05 22:33:10,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 246. [2021-06-05 22:33:10,591 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) [2021-06-05 22:33:10,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 738 transitions. [2021-06-05 22:33:10,592 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 738 transitions. Word has length 20 [2021-06-05 22:33:10,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:10,592 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 738 transitions. [2021-06-05 22:33:10,592 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) [2021-06-05 22:33:10,592 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 738 transitions. [2021-06-05 22:33:10,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:10,592 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:10,593 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:10,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 22:33:10,805 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:10,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:10,805 INFO L82 PathProgramCache]: Analyzing trace with hash -162237149, now seen corresponding path program 8 times [2021-06-05 22:33:10,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:10,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831434977] [2021-06-05 22:33:10,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:10,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:10,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:10,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:10,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831434977] [2021-06-05 22:33:10,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831434977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:10,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454190942] [2021-06-05 22:33:10,886 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 [2021-06-05 22:33:10,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:10,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:10,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:33:10,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:10,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:10,967 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 [2021-06-05 22:33:10,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:10,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:10,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:10,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:33:11,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:11,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454190942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:11,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:11,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:33:11,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359405905] [2021-06-05 22:33:11,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:33:11,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:11,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:33:11,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:33:11,017 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) [2021-06-05 22:33:11,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:11,242 INFO L93 Difference]: Finished difference Result 351 states and 1041 transitions. [2021-06-05 22:33:11,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:33:11,242 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 [2021-06-05 22:33:11,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:11,243 INFO L225 Difference]: With dead ends: 351 [2021-06-05 22:33:11,243 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 22:33:11,244 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 161.1ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:33:11,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 22:33:11,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 256. [2021-06-05 22:33:11,247 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) [2021-06-05 22:33:11,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 781 transitions. [2021-06-05 22:33:11,248 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 781 transitions. Word has length 20 [2021-06-05 22:33:11,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:11,248 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 781 transitions. [2021-06-05 22:33:11,248 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) [2021-06-05 22:33:11,248 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 781 transitions. [2021-06-05 22:33:11,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:11,249 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:11,249 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:11,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 22:33:11,465 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:11,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:11,465 INFO L82 PathProgramCache]: Analyzing trace with hash -428870833, now seen corresponding path program 8 times [2021-06-05 22:33:11,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:11,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360438357] [2021-06-05 22:33:11,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:11,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:11,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:11,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:11,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360438357] [2021-06-05 22:33:11,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360438357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:11,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102067791] [2021-06-05 22:33:11,526 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 [2021-06-05 22:33:11,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:11,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:11,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:33:11,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:11,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:11,607 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 [2021-06-05 22:33:11,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:11,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:11,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:11,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:33:11,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:11,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102067791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:11,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:11,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:33:11,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115765728] [2021-06-05 22:33:11,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:33:11,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:11,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:33:11,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:33:11,659 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) [2021-06-05 22:33:11,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:11,800 INFO L93 Difference]: Finished difference Result 333 states and 1000 transitions. [2021-06-05 22:33:11,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:33:11,801 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 [2021-06-05 22:33:11,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:11,802 INFO L225 Difference]: With dead ends: 333 [2021-06-05 22:33:11,802 INFO L226 Difference]: Without dead ends: 324 [2021-06-05 22:33:11,802 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 139.2ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:33:11,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-06-05 22:33:11,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 259. [2021-06-05 22:33:11,806 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) [2021-06-05 22:33:11,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 791 transitions. [2021-06-05 22:33:11,806 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 791 transitions. Word has length 20 [2021-06-05 22:33:11,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:11,806 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 791 transitions. [2021-06-05 22:33:11,806 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) [2021-06-05 22:33:11,806 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 791 transitions. [2021-06-05 22:33:11,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:11,807 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:11,807 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:12,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:12,023 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:12,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:12,023 INFO L82 PathProgramCache]: Analyzing trace with hash -105284655, now seen corresponding path program 9 times [2021-06-05 22:33:12,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:12,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524542146] [2021-06-05 22:33:12,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:12,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:12,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:12,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524542146] [2021-06-05 22:33:12,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524542146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:12,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570386962] [2021-06-05 22:33:12,123 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 [2021-06-05 22:33:12,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:33:12,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:12,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:33:12,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:12,257 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:12,257 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 [2021-06-05 22:33:12,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:33:12,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:12,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:12,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:33:12,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:12,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570386962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:12,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:12,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:33:12,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576076532] [2021-06-05 22:33:12,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:33:12,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:12,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:33:12,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:33:12,378 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) [2021-06-05 22:33:12,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:12,978 INFO L93 Difference]: Finished difference Result 353 states and 1060 transitions. [2021-06-05 22:33:12,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:33:12,978 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 [2021-06-05 22:33:12,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:12,979 INFO L225 Difference]: With dead ends: 353 [2021-06-05 22:33:12,979 INFO L226 Difference]: Without dead ends: 340 [2021-06-05 22:33:12,980 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 498.1ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:33:12,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-05 22:33:12,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 256. [2021-06-05 22:33:12,983 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) [2021-06-05 22:33:12,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 781 transitions. [2021-06-05 22:33:12,984 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 781 transitions. Word has length 20 [2021-06-05 22:33:12,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:12,984 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 781 transitions. [2021-06-05 22:33:12,984 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) [2021-06-05 22:33:12,984 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 781 transitions. [2021-06-05 22:33:12,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:12,984 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:12,984 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:13,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 22:33:13,200 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:13,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:13,201 INFO L82 PathProgramCache]: Analyzing trace with hash 431638013, now seen corresponding path program 9 times [2021-06-05 22:33:13,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:13,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885419673] [2021-06-05 22:33:13,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:13,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:13,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:13,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:13,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885419673] [2021-06-05 22:33:13,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885419673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:13,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041279916] [2021-06-05 22:33:13,274 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 [2021-06-05 22:33:13,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:33:13,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:13,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:33:13,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:13,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:13,365 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 [2021-06-05 22:33:13,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:33:13,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:13,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:13,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:23 [2021-06-05 22:33:13,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:13,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041279916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:13,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:13,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:33:13,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741946695] [2021-06-05 22:33:13,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:33:13,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:13,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:33:13,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:33:13,482 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) [2021-06-05 22:33:14,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:14,273 INFO L93 Difference]: Finished difference Result 485 states and 1380 transitions. [2021-06-05 22:33:14,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:33:14,273 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 [2021-06-05 22:33:14,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:14,275 INFO L225 Difference]: With dead ends: 485 [2021-06-05 22:33:14,275 INFO L226 Difference]: Without dead ends: 458 [2021-06-05 22:33:14,275 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 599.6ms TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:33:14,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-05 22:33:14,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 293. [2021-06-05 22:33:14,280 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) [2021-06-05 22:33:14,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 904 transitions. [2021-06-05 22:33:14,280 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 904 transitions. Word has length 20 [2021-06-05 22:33:14,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:14,280 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 904 transitions. [2021-06-05 22:33:14,280 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) [2021-06-05 22:33:14,280 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 904 transitions. [2021-06-05 22:33:14,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:14,281 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:14,281 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:14,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 22:33:14,497 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:14,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:14,498 INFO L82 PathProgramCache]: Analyzing trace with hash 226719879, now seen corresponding path program 10 times [2021-06-05 22:33:14,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:14,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274973934] [2021-06-05 22:33:14,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:14,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:14,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:14,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:14,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274973934] [2021-06-05 22:33:14,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274973934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:14,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616597299] [2021-06-05 22:33:14,580 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 [2021-06-05 22:33:14,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:33:14,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:14,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:33:14,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:14,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:14,670 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 [2021-06-05 22:33:14,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:14,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:14,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:14,678 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-05 22:33:14,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:14,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616597299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:14,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:14,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:33:14,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445392488] [2021-06-05 22:33:14,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:33:14,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:14,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:33:14,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:33:14,712 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) [2021-06-05 22:33:14,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:14,869 INFO L93 Difference]: Finished difference Result 371 states and 1128 transitions. [2021-06-05 22:33:14,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:33:14,869 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 [2021-06-05 22:33:14,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:14,870 INFO L225 Difference]: With dead ends: 371 [2021-06-05 22:33:14,870 INFO L226 Difference]: Without dead ends: 360 [2021-06-05 22:33:14,870 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 163.0ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:33:14,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-06-05 22:33:14,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 295. [2021-06-05 22:33:14,885 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) [2021-06-05 22:33:14,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 908 transitions. [2021-06-05 22:33:14,886 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 908 transitions. Word has length 20 [2021-06-05 22:33:14,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:14,886 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 908 transitions. [2021-06-05 22:33:14,886 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) [2021-06-05 22:33:14,886 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 908 transitions. [2021-06-05 22:33:14,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:14,887 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:14,887 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:15,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:15,093 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:15,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:15,093 INFO L82 PathProgramCache]: Analyzing trace with hash 2027400643, now seen corresponding path program 10 times [2021-06-05 22:33:15,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:15,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719095365] [2021-06-05 22:33:15,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:15,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:15,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:15,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:15,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719095365] [2021-06-05 22:33:15,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719095365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:15,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374588720] [2021-06-05 22:33:15,179 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 [2021-06-05 22:33:15,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:33:15,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:15,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:33:15,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:15,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:15,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-05 22:33:15,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:15,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:15,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:15,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-05 22:33:15,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:15,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374588720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:15,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:15,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:33:15,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050632360] [2021-06-05 22:33:15,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:33:15,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:15,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:33:15,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:33:15,305 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) [2021-06-05 22:33:15,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:15,503 INFO L93 Difference]: Finished difference Result 412 states and 1240 transitions. [2021-06-05 22:33:15,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:33:15,504 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 [2021-06-05 22:33:15,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:15,505 INFO L225 Difference]: With dead ends: 412 [2021-06-05 22:33:15,505 INFO L226 Difference]: Without dead ends: 402 [2021-06-05 22:33:15,505 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 178.7ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:33:15,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-06-05 22:33:15,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 298. [2021-06-05 22:33:15,509 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) [2021-06-05 22:33:15,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 917 transitions. [2021-06-05 22:33:15,510 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 917 transitions. Word has length 20 [2021-06-05 22:33:15,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:15,510 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 917 transitions. [2021-06-05 22:33:15,510 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) [2021-06-05 22:33:15,510 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 917 transitions. [2021-06-05 22:33:15,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:15,510 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:15,510 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:15,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 22:33:15,721 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:15,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:15,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1645911141, now seen corresponding path program 11 times [2021-06-05 22:33:15,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:15,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674761573] [2021-06-05 22:33:15,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:15,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:15,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:15,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:15,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674761573] [2021-06-05 22:33:15,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674761573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:15,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293305983] [2021-06-05 22:33:15,817 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 [2021-06-05 22:33:15,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:15,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:15,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:33:15,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:15,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:15,921 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 [2021-06-05 22:33:15,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:15,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:15,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:15,932 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:10 [2021-06-05 22:33:15,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:15,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293305983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:15,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:15,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:33:15,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922399134] [2021-06-05 22:33:15,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:33:15,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:15,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:33:15,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:33:15,976 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) [2021-06-05 22:33:16,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:16,385 INFO L93 Difference]: Finished difference Result 460 states and 1382 transitions. [2021-06-05 22:33:16,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:33:16,385 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 [2021-06-05 22:33:16,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:16,390 INFO L225 Difference]: With dead ends: 460 [2021-06-05 22:33:16,390 INFO L226 Difference]: Without dead ends: 450 [2021-06-05 22:33:16,390 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 347.3ms TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:33:16,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-05 22:33:16,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 298. [2021-06-05 22:33:16,395 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) [2021-06-05 22:33:16,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 917 transitions. [2021-06-05 22:33:16,395 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 917 transitions. Word has length 20 [2021-06-05 22:33:16,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:16,395 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 917 transitions. [2021-06-05 22:33:16,395 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) [2021-06-05 22:33:16,395 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 917 transitions. [2021-06-05 22:33:16,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:16,396 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:16,396 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:16,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:16,605 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:16,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:16,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1815317715, now seen corresponding path program 12 times [2021-06-05 22:33:16,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:16,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766193493] [2021-06-05 22:33:16,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:16,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:16,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:33:16,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:16,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766193493] [2021-06-05 22:33:16,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766193493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:16,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926362085] [2021-06-05 22:33:16,691 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 [2021-06-05 22:33:16,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:33:16,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:16,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:33:16,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:16,771 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:16,772 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 [2021-06-05 22:33:16,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:33:16,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:16,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:16,781 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:33:16,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:16,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926362085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:16,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:16,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:33:16,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409700598] [2021-06-05 22:33:16,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:33:16,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:16,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:33:16,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:33:16,873 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) [2021-06-05 22:33:17,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:17,515 INFO L93 Difference]: Finished difference Result 552 states and 1617 transitions. [2021-06-05 22:33:17,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:33:17,515 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 [2021-06-05 22:33:17,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:17,517 INFO L225 Difference]: With dead ends: 552 [2021-06-05 22:33:17,517 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 22:33:17,518 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 547.7ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:33:17,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 22:33:17,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 306. [2021-06-05 22:33:17,522 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) [2021-06-05 22:33:17,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 951 transitions. [2021-06-05 22:33:17,522 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 951 transitions. Word has length 20 [2021-06-05 22:33:17,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:17,522 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 951 transitions. [2021-06-05 22:33:17,523 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) [2021-06-05 22:33:17,523 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 951 transitions. [2021-06-05 22:33:17,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:17,523 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:17,523 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:17,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 22:33:17,729 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:17,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:17,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1895521031, now seen corresponding path program 11 times [2021-06-05 22:33:17,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:17,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468329573] [2021-06-05 22:33:17,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:17,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:17,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:17,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468329573] [2021-06-05 22:33:17,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468329573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:17,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228250563] [2021-06-05 22:33:17,792 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 [2021-06-05 22:33:17,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:17,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:17,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:33:17,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:17,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:17,885 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 [2021-06-05 22:33:17,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:17,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:17,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:17,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-05 22:33:17,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:17,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228250563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:17,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:17,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:33:17,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762044699] [2021-06-05 22:33:17,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:33:17,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:17,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:33:17,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:33:17,926 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) [2021-06-05 22:33:18,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:18,120 INFO L93 Difference]: Finished difference Result 408 states and 1237 transitions. [2021-06-05 22:33:18,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:33:18,120 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 [2021-06-05 22:33:18,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:18,122 INFO L225 Difference]: With dead ends: 408 [2021-06-05 22:33:18,122 INFO L226 Difference]: Without dead ends: 399 [2021-06-05 22:33:18,122 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 159.0ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:33:18,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-06-05 22:33:18,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 309. [2021-06-05 22:33:18,126 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) [2021-06-05 22:33:18,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 961 transitions. [2021-06-05 22:33:18,126 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 961 transitions. Word has length 20 [2021-06-05 22:33:18,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:18,126 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 961 transitions. [2021-06-05 22:33:18,127 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) [2021-06-05 22:33:18,127 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 961 transitions. [2021-06-05 22:33:18,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:18,127 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:18,127 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:18,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 22:33:18,337 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:18,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:18,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1371296405, now seen corresponding path program 12 times [2021-06-05 22:33:18,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:18,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149293637] [2021-06-05 22:33:18,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:18,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:18,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:18,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:18,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149293637] [2021-06-05 22:33:18,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149293637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:18,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341354743] [2021-06-05 22:33:18,396 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 [2021-06-05 22:33:18,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:33:18,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:18,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:33:18,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:18,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:18,480 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 [2021-06-05 22:33:18,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:33:18,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:18,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:18,489 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-06-05 22:33:18,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:18,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341354743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:18,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:18,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 22:33:18,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166583786] [2021-06-05 22:33:18,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:33:18,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:18,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:33:18,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:33:18,554 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) [2021-06-05 22:33:18,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:18,930 INFO L93 Difference]: Finished difference Result 429 states and 1298 transitions. [2021-06-05 22:33:18,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:33:18,931 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 [2021-06-05 22:33:18,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:18,932 INFO L225 Difference]: With dead ends: 429 [2021-06-05 22:33:18,932 INFO L226 Difference]: Without dead ends: 420 [2021-06-05 22:33:18,932 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 303.6ms TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:33:18,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-06-05 22:33:18,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 312. [2021-06-05 22:33:18,936 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) [2021-06-05 22:33:18,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 971 transitions. [2021-06-05 22:33:18,937 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 971 transitions. Word has length 20 [2021-06-05 22:33:18,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:18,937 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 971 transitions. [2021-06-05 22:33:18,937 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) [2021-06-05 22:33:18,937 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 971 transitions. [2021-06-05 22:33:18,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:18,938 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:18,938 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:19,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 22:33:19,149 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:19,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:19,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1694882583, now seen corresponding path program 13 times [2021-06-05 22:33:19,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:19,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453760681] [2021-06-05 22:33:19,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:19,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:19,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:19,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453760681] [2021-06-05 22:33:19,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453760681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:19,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826386828] [2021-06-05 22:33:19,199 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 [2021-06-05 22:33:19,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:19,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:33:19,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:19,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:19,300 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 [2021-06-05 22:33:19,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:19,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:19,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:19,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:33:19,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:19,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826386828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:19,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:19,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:33:19,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048967551] [2021-06-05 22:33:19,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:33:19,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:19,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:33:19,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:33:19,348 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) [2021-06-05 22:33:19,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:19,513 INFO L93 Difference]: Finished difference Result 391 states and 1193 transitions. [2021-06-05 22:33:19,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:33:19,513 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 [2021-06-05 22:33:19,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:19,515 INFO L225 Difference]: With dead ends: 391 [2021-06-05 22:33:19,515 INFO L226 Difference]: Without dead ends: 380 [2021-06-05 22:33:19,515 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 133.0ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:33:19,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-06-05 22:33:19,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 306. [2021-06-05 22:33:19,519 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) [2021-06-05 22:33:19,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 951 transitions. [2021-06-05 22:33:19,519 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 951 transitions. Word has length 20 [2021-06-05 22:33:19,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:19,519 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 951 transitions. [2021-06-05 22:33:19,519 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) [2021-06-05 22:33:19,520 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 951 transitions. [2021-06-05 22:33:19,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:19,520 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:19,520 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:19,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 22:33:19,733 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:19,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:19,733 INFO L82 PathProgramCache]: Analyzing trace with hash -455362805, now seen corresponding path program 13 times [2021-06-05 22:33:19,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:19,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911634900] [2021-06-05 22:33:19,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:19,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:19,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:19,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:19,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911634900] [2021-06-05 22:33:19,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911634900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:19,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190570489] [2021-06-05 22:33:19,808 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) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:19,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:19,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:33:19,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:19,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:19,904 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 [2021-06-05 22:33:19,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:19,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:19,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:19,913 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:33:19,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:19,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190570489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:19,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:19,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:33:19,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797303367] [2021-06-05 22:33:19,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:33:19,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:19,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:33:19,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:33:19,959 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) [2021-06-05 22:33:20,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:20,193 INFO L93 Difference]: Finished difference Result 431 states and 1307 transitions. [2021-06-05 22:33:20,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:33:20,194 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 [2021-06-05 22:33:20,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:20,195 INFO L225 Difference]: With dead ends: 431 [2021-06-05 22:33:20,195 INFO L226 Difference]: Without dead ends: 421 [2021-06-05 22:33:20,195 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 179.8ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:33:20,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-06-05 22:33:20,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 309. [2021-06-05 22:33:20,199 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) [2021-06-05 22:33:20,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 959 transitions. [2021-06-05 22:33:20,200 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 959 transitions. Word has length 20 [2021-06-05 22:33:20,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:20,200 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 959 transitions. [2021-06-05 22:33:20,200 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) [2021-06-05 22:33:20,200 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 959 transitions. [2021-06-05 22:33:20,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:20,201 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:20,201 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:20,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 22:33:20,416 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:20,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:20,416 INFO L82 PathProgramCache]: Analyzing trace with hash 2048743317, now seen corresponding path program 14 times [2021-06-05 22:33:20,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:20,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321208768] [2021-06-05 22:33:20,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:20,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:20,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:20,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321208768] [2021-06-05 22:33:20,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321208768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:20,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786032754] [2021-06-05 22:33:20,521 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 [2021-06-05 22:33:20,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:20,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:20,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:33:20,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:20,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:20,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-05 22:33:20,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:20,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:20,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:20,608 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:33:20,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:20,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786032754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:20,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:20,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:33:20,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128994059] [2021-06-05 22:33:20,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:33:20,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:20,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:33:20,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:33:20,647 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) [2021-06-05 22:33:20,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:20,883 INFO L93 Difference]: Finished difference Result 424 states and 1287 transitions. [2021-06-05 22:33:20,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:33:20,883 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 [2021-06-05 22:33:20,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:20,885 INFO L225 Difference]: With dead ends: 424 [2021-06-05 22:33:20,885 INFO L226 Difference]: Without dead ends: 412 [2021-06-05 22:33:20,885 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 192.7ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:33:20,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-06-05 22:33:20,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 309. [2021-06-05 22:33:20,888 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) [2021-06-05 22:33:20,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 959 transitions. [2021-06-05 22:33:20,889 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 959 transitions. Word has length 20 [2021-06-05 22:33:20,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:20,889 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 959 transitions. [2021-06-05 22:33:20,889 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) [2021-06-05 22:33:20,889 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 959 transitions. [2021-06-05 22:33:20,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:20,890 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:20,890 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:21,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:21,101 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:21,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:21,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1782109633, now seen corresponding path program 14 times [2021-06-05 22:33:21,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:21,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263526464] [2021-06-05 22:33:21,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:21,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:21,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:21,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:21,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263526464] [2021-06-05 22:33:21,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263526464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:21,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542559735] [2021-06-05 22:33:21,164 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 [2021-06-05 22:33:21,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:21,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:21,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:33:21,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:21,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:21,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-05 22:33:21,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:21,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:21,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:21,261 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:33:21,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:21,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542559735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:21,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:21,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:33:21,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609565301] [2021-06-05 22:33:21,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:33:21,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:21,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:33:21,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:33:21,315 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) [2021-06-05 22:33:21,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:21,492 INFO L93 Difference]: Finished difference Result 398 states and 1210 transitions. [2021-06-05 22:33:21,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:33:21,493 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 [2021-06-05 22:33:21,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:21,494 INFO L225 Difference]: With dead ends: 398 [2021-06-05 22:33:21,494 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 22:33:21,494 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 149.4ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:33:21,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 22:33:21,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 312. [2021-06-05 22:33:21,498 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) [2021-06-05 22:33:21,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 969 transitions. [2021-06-05 22:33:21,499 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 969 transitions. Word has length 20 [2021-06-05 22:33:21,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:21,499 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 969 transitions. [2021-06-05 22:33:21,499 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) [2021-06-05 22:33:21,499 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 969 transitions. [2021-06-05 22:33:21,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:21,500 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:21,500 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:21,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:21,716 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:21,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:21,717 INFO L82 PathProgramCache]: Analyzing trace with hash 2105695811, now seen corresponding path program 15 times [2021-06-05 22:33:21,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:21,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719157167] [2021-06-05 22:33:21,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:21,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:21,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:21,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719157167] [2021-06-05 22:33:21,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719157167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:21,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361911012] [2021-06-05 22:33:21,786 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 [2021-06-05 22:33:21,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:33:21,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:21,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:33:21,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:21,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:21,899 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 [2021-06-05 22:33:21,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:33:21,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:21,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:21,910 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:33:22,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:22,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361911012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:22,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:22,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:33:22,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072697228] [2021-06-05 22:33:22,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:33:22,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:22,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:33:22,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:33:22,078 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) [2021-06-05 22:33:22,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:22,873 INFO L93 Difference]: Finished difference Result 464 states and 1400 transitions. [2021-06-05 22:33:22,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:33:22,873 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 [2021-06-05 22:33:22,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:22,874 INFO L225 Difference]: With dead ends: 464 [2021-06-05 22:33:22,875 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 22:33:22,875 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 716.7ms TimeCoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:33:22,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 22:33:22,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 309. [2021-06-05 22:33:22,882 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) [2021-06-05 22:33:22,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 959 transitions. [2021-06-05 22:33:22,882 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 959 transitions. Word has length 20 [2021-06-05 22:33:22,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:22,882 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 959 transitions. [2021-06-05 22:33:22,882 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) [2021-06-05 22:33:22,882 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 959 transitions. [2021-06-05 22:33:22,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:22,883 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:22,883 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:23,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-05 22:33:23,099 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:23,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:23,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1652348817, now seen corresponding path program 15 times [2021-06-05 22:33:23,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:23,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327042542] [2021-06-05 22:33:23,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:23,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:23,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:23,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327042542] [2021-06-05 22:33:23,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327042542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:23,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861652875] [2021-06-05 22:33:23,173 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 [2021-06-05 22:33:23,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:33:23,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:23,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:33:23,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:23,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:23,271 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 [2021-06-05 22:33:23,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:33:23,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:23,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:23,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:23 [2021-06-05 22:33:23,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:23,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861652875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:23,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:23,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:33:23,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413048124] [2021-06-05 22:33:23,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:33:23,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:23,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:33:23,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:33:23,374 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) [2021-06-05 22:33:24,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:24,423 INFO L93 Difference]: Finished difference Result 598 states and 1728 transitions. [2021-06-05 22:33:24,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:33:24,423 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 [2021-06-05 22:33:24,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:24,425 INFO L225 Difference]: With dead ends: 598 [2021-06-05 22:33:24,425 INFO L226 Difference]: Without dead ends: 571 [2021-06-05 22:33:24,426 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 796.1ms TimeCoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:33:24,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-05 22:33:24,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 313. [2021-06-05 22:33:24,433 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) [2021-06-05 22:33:24,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 971 transitions. [2021-06-05 22:33:24,433 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 971 transitions. Word has length 20 [2021-06-05 22:33:24,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:24,434 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 971 transitions. [2021-06-05 22:33:24,434 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) [2021-06-05 22:33:24,434 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 971 transitions. [2021-06-05 22:33:24,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:24,434 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:24,434 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:24,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:24,649 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:24,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:24,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1857266951, now seen corresponding path program 16 times [2021-06-05 22:33:24,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:24,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137627710] [2021-06-05 22:33:24,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:24,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:24,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:24,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137627710] [2021-06-05 22:33:24,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137627710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:24,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980271370] [2021-06-05 22:33:24,730 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 [2021-06-05 22:33:24,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:33:24,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:24,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:33:24,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:24,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:24,832 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 [2021-06-05 22:33:24,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:24,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:24,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:24,839 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 22:33:24,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:24,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980271370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:24,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:24,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:33:24,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865873853] [2021-06-05 22:33:24,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:33:24,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:24,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:33:24,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:33:24,887 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) [2021-06-05 22:33:25,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:25,099 INFO L93 Difference]: Finished difference Result 403 states and 1227 transitions. [2021-06-05 22:33:25,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:33:25,100 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 [2021-06-05 22:33:25,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:25,101 INFO L225 Difference]: With dead ends: 403 [2021-06-05 22:33:25,101 INFO L226 Difference]: Without dead ends: 392 [2021-06-05 22:33:25,101 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 174.1ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:33:25,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-05 22:33:25,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 306. [2021-06-05 22:33:25,105 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) [2021-06-05 22:33:25,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 951 transitions. [2021-06-05 22:33:25,106 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 951 transitions. Word has length 20 [2021-06-05 22:33:25,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:25,106 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 951 transitions. [2021-06-05 22:33:25,106 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) [2021-06-05 22:33:25,106 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 951 transitions. [2021-06-05 22:33:25,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:25,106 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:25,107 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:25,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:25,321 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:25,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:25,321 INFO L82 PathProgramCache]: Analyzing trace with hash -76255857, now seen corresponding path program 16 times [2021-06-05 22:33:25,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:25,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89932827] [2021-06-05 22:33:25,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:25,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:25,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:25,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89932827] [2021-06-05 22:33:25,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89932827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:25,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032868929] [2021-06-05 22:33:25,399 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 [2021-06-05 22:33:25,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:33:25,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:25,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:33:25,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:25,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:25,483 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 [2021-06-05 22:33:25,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:25,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:25,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:25,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:33:25,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:25,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032868929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:25,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:25,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:33:25,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971174748] [2021-06-05 22:33:25,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:33:25,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:25,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:33:25,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:33:25,538 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) [2021-06-05 22:33:25,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:25,810 INFO L93 Difference]: Finished difference Result 448 states and 1357 transitions. [2021-06-05 22:33:25,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:33:25,810 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 [2021-06-05 22:33:25,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:25,812 INFO L225 Difference]: With dead ends: 448 [2021-06-05 22:33:25,812 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 22:33:25,812 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 239.1ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:33:25,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 22:33:25,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 312. [2021-06-05 22:33:25,816 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) [2021-06-05 22:33:25,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 968 transitions. [2021-06-05 22:33:25,816 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 968 transitions. Word has length 20 [2021-06-05 22:33:25,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:25,817 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 968 transitions. [2021-06-05 22:33:25,817 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) [2021-06-05 22:33:25,817 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 968 transitions. [2021-06-05 22:33:25,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:25,817 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:25,817 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:26,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:26,018 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:26,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:26,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1438435337, now seen corresponding path program 17 times [2021-06-05 22:33:26,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:26,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408052984] [2021-06-05 22:33:26,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:26,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:26,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408052984] [2021-06-05 22:33:26,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408052984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:26,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232269100] [2021-06-05 22:33:26,112 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 [2021-06-05 22:33:26,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:33:26,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:26,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:33:26,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:26,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:26,189 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 [2021-06-05 22:33:26,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:26,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:26,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:26,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:33:26,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:26,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232269100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:26,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:26,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:33:26,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122976165] [2021-06-05 22:33:26,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:33:26,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:26,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:33:26,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:33:26,246 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) [2021-06-05 22:33:26,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:26,599 INFO L93 Difference]: Finished difference Result 497 states and 1504 transitions. [2021-06-05 22:33:26,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:33:26,599 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 [2021-06-05 22:33:26,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:26,601 INFO L225 Difference]: With dead ends: 497 [2021-06-05 22:33:26,601 INFO L226 Difference]: Without dead ends: 485 [2021-06-05 22:33:26,601 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 273.0ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:33:26,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-06-05 22:33:26,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 312. [2021-06-05 22:33:26,605 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) [2021-06-05 22:33:26,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 968 transitions. [2021-06-05 22:33:26,605 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 968 transitions. Word has length 20 [2021-06-05 22:33:26,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:26,605 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 968 transitions. [2021-06-05 22:33:26,605 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) [2021-06-05 22:33:26,606 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 968 transitions. [2021-06-05 22:33:26,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:26,607 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:26,607 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:26,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:26,809 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:26,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:26,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1865369703, now seen corresponding path program 17 times [2021-06-05 22:33:26,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:26,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153951587] [2021-06-05 22:33:26,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:26,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:26,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:26,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153951587] [2021-06-05 22:33:26,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153951587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:26,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555026425] [2021-06-05 22:33:26,873 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 [2021-06-05 22:33:26,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:33:26,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:26,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:33:26,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:26,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:26,967 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 [2021-06-05 22:33:26,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:26,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:26,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:26,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:33:27,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:27,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555026425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:27,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:27,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:33:27,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449909033] [2021-06-05 22:33:27,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:33:27,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:27,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:33:27,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:33:27,020 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) [2021-06-05 22:33:27,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:27,219 INFO L93 Difference]: Finished difference Result 435 states and 1319 transitions. [2021-06-05 22:33:27,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:33:27,219 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 [2021-06-05 22:33:27,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:27,220 INFO L225 Difference]: With dead ends: 435 [2021-06-05 22:33:27,220 INFO L226 Difference]: Without dead ends: 426 [2021-06-05 22:33:27,221 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 165.3ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:33:27,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-06-05 22:33:27,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 315. [2021-06-05 22:33:27,224 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) [2021-06-05 22:33:27,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 978 transitions. [2021-06-05 22:33:27,225 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 978 transitions. Word has length 20 [2021-06-05 22:33:27,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:27,225 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 978 transitions. [2021-06-05 22:33:27,225 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) [2021-06-05 22:33:27,225 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 978 transitions. [2021-06-05 22:33:27,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:27,226 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:27,226 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:27,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 22:33:27,434 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:27,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:27,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1541783525, now seen corresponding path program 18 times [2021-06-05 22:33:27,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:27,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977010994] [2021-06-05 22:33:27,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:27,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:27,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:27,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:27,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977010994] [2021-06-05 22:33:27,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977010994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:27,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490514035] [2021-06-05 22:33:27,506 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 [2021-06-05 22:33:27,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:33:27,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:27,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:33:27,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:27,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:27,593 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 [2021-06-05 22:33:27,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:27,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:27,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:27,602 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:33:27,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:27,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490514035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:27,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:27,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:33:27,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308752946] [2021-06-05 22:33:27,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:33:27,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:27,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:33:27,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:33:27,644 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) [2021-06-05 22:33:27,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:27,807 INFO L93 Difference]: Finished difference Result 432 states and 1315 transitions. [2021-06-05 22:33:27,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:33:27,808 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 [2021-06-05 22:33:27,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:27,809 INFO L225 Difference]: With dead ends: 432 [2021-06-05 22:33:27,809 INFO L226 Difference]: Without dead ends: 421 [2021-06-05 22:33:27,809 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 155.3ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:33:27,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-06-05 22:33:27,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 312. [2021-06-05 22:33:27,813 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) [2021-06-05 22:33:27,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 968 transitions. [2021-06-05 22:33:27,813 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 968 transitions. Word has length 20 [2021-06-05 22:33:27,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:27,814 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 968 transitions. [2021-06-05 22:33:27,814 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) [2021-06-05 22:33:27,814 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 968 transitions. [2021-06-05 22:33:27,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:27,814 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:27,814 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:28,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:28,031 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:28,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:28,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1004860857, now seen corresponding path program 18 times [2021-06-05 22:33:28,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:28,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529047284] [2021-06-05 22:33:28,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:28,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:28,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:28,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:28,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529047284] [2021-06-05 22:33:28,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529047284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:28,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620513905] [2021-06-05 22:33:28,123 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 [2021-06-05 22:33:28,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:33:28,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:28,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:33:28,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:28,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:28,230 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 [2021-06-05 22:33:28,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:33:28,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:28,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:28,241 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:29 [2021-06-05 22:33:28,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:28,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620513905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:28,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:28,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:33:28,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391828110] [2021-06-05 22:33:28,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:33:28,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:28,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:33:28,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:33:28,300 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) [2021-06-05 22:33:29,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:29,240 INFO L93 Difference]: Finished difference Result 644 states and 1918 transitions. [2021-06-05 22:33:29,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:33:29,240 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 [2021-06-05 22:33:29,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:29,242 INFO L225 Difference]: With dead ends: 644 [2021-06-05 22:33:29,242 INFO L226 Difference]: Without dead ends: 622 [2021-06-05 22:33:29,242 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 659.8ms TimeCoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:33:29,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-06-05 22:33:29,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 316. [2021-06-05 22:33:29,246 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) [2021-06-05 22:33:29,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 980 transitions. [2021-06-05 22:33:29,247 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 980 transitions. Word has length 20 [2021-06-05 22:33:29,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:29,247 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 980 transitions. [2021-06-05 22:33:29,247 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) [2021-06-05 22:33:29,247 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 980 transitions. [2021-06-05 22:33:29,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:29,248 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:29,248 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:29,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:29,461 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:29,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:29,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1209778991, now seen corresponding path program 19 times [2021-06-05 22:33:29,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:29,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20391620] [2021-06-05 22:33:29,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:29,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:29,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:29,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:29,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20391620] [2021-06-05 22:33:29,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20391620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:29,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789071361] [2021-06-05 22:33:29,531 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 [2021-06-05 22:33:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:29,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:33:29,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:29,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:29,637 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 [2021-06-05 22:33:29,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:29,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:29,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:29,644 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 22:33:29,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:29,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789071361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:29,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:29,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:33:29,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221866801] [2021-06-05 22:33:29,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:33:29,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:29,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:33:29,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:33:29,674 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) [2021-06-05 22:33:29,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:29,907 INFO L93 Difference]: Finished difference Result 437 states and 1326 transitions. [2021-06-05 22:33:29,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:33:29,908 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 [2021-06-05 22:33:29,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:29,909 INFO L225 Difference]: With dead ends: 437 [2021-06-05 22:33:29,909 INFO L226 Difference]: Without dead ends: 426 [2021-06-05 22:33:29,909 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 169.4ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:33:29,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-06-05 22:33:29,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 315. [2021-06-05 22:33:29,913 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) [2021-06-05 22:33:29,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 979 transitions. [2021-06-05 22:33:29,914 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 979 transitions. Word has length 20 [2021-06-05 22:33:29,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:29,914 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 979 transitions. [2021-06-05 22:33:29,914 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) [2021-06-05 22:33:29,914 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 979 transitions. [2021-06-05 22:33:29,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:29,914 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:29,914 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:30,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:30,132 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:30,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:30,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1625404767, now seen corresponding path program 19 times [2021-06-05 22:33:30,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:30,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354393811] [2021-06-05 22:33:30,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:30,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:30,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:30,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:30,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354393811] [2021-06-05 22:33:30,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354393811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:30,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40977715] [2021-06-05 22:33:30,209 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 [2021-06-05 22:33:30,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:30,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:33:30,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:30,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:30,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-05 22:33:30,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:30,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:30,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:30,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 22:33:30,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:30,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40977715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:30,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:30,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:33:30,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901933595] [2021-06-05 22:33:30,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:33:30,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:30,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:33:30,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:33:30,345 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) [2021-06-05 22:33:30,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:30,809 INFO L93 Difference]: Finished difference Result 577 states and 1769 transitions. [2021-06-05 22:33:30,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:33:30,809 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 [2021-06-05 22:33:30,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:30,810 INFO L225 Difference]: With dead ends: 577 [2021-06-05 22:33:30,810 INFO L226 Difference]: Without dead ends: 566 [2021-06-05 22:33:30,811 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 281.1ms TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:33:30,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-05 22:33:30,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 323. [2021-06-05 22:33:30,815 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) [2021-06-05 22:33:30,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 1004 transitions. [2021-06-05 22:33:30,816 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 1004 transitions. Word has length 20 [2021-06-05 22:33:30,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:30,816 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 1004 transitions. [2021-06-05 22:33:30,816 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) [2021-06-05 22:33:30,816 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 1004 transitions. [2021-06-05 22:33:30,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:33:30,816 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:30,816 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:31,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 22:33:31,020 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:31,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:31,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1821665449, now seen corresponding path program 20 times [2021-06-05 22:33:31,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:31,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290923975] [2021-06-05 22:33:31,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:31,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:31,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:31,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:31,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290923975] [2021-06-05 22:33:31,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290923975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:31,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492940179] [2021-06-05 22:33:31,082 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) [2021-06-05 22:33:31,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:31,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:31,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:33:31,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:31,184 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:31,184 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 [2021-06-05 22:33:31,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:33:31,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:31,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:31,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:22 [2021-06-05 22:33:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:31,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492940179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:31,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:31,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 22:33:31,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140615171] [2021-06-05 22:33:31,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:33:31,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:31,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:33:31,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:33:31,261 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) [2021-06-05 22:33:31,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:31,678 INFO L93 Difference]: Finished difference Result 516 states and 1586 transitions. [2021-06-05 22:33:31,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:33:31,679 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 [2021-06-05 22:33:31,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:31,680 INFO L225 Difference]: With dead ends: 516 [2021-06-05 22:33:31,680 INFO L226 Difference]: Without dead ends: 505 [2021-06-05 22:33:31,680 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 278.6ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:33:31,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-06-05 22:33:31,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 322. [2021-06-05 22:33:31,684 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) [2021-06-05 22:33:31,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1003 transitions. [2021-06-05 22:33:31,685 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1003 transitions. Word has length 20 [2021-06-05 22:33:31,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:31,685 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 1003 transitions. [2021-06-05 22:33:31,685 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) [2021-06-05 22:33:31,685 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1003 transitions. [2021-06-05 22:33:31,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:33:31,685 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:31,686 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:31,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:31,886 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:31,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:31,886 INFO L82 PathProgramCache]: Analyzing trace with hash -827696633, now seen corresponding path program 20 times [2021-06-05 22:33:31,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:31,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442859857] [2021-06-05 22:33:31,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:31,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:31,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:31,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:31,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442859857] [2021-06-05 22:33:31,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442859857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:31,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532240403] [2021-06-05 22:33:31,915 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) [2021-06-05 22:33:31,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:31,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:31,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:33:31,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:32,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:32,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532240403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:32,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:32,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 22:33:32,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108732087] [2021-06-05 22:33:32,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:33:32,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:32,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:33:32,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:33:32,013 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) [2021-06-05 22:33:32,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:32,068 INFO L93 Difference]: Finished difference Result 489 states and 1527 transitions. [2021-06-05 22:33:32,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:33:32,068 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 [2021-06-05 22:33:32,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:32,069 INFO L225 Difference]: With dead ends: 489 [2021-06-05 22:33:32,069 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 22:33:32,069 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:33:32,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 22:33:32,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 311. [2021-06-05 22:33:32,073 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) [2021-06-05 22:33:32,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 993 transitions. [2021-06-05 22:33:32,073 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 993 transitions. Word has length 22 [2021-06-05 22:33:32,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:32,074 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 993 transitions. [2021-06-05 22:33:32,074 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) [2021-06-05 22:33:32,074 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 993 transitions. [2021-06-05 22:33:32,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:33:32,074 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:32,074 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:32,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:32,275 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:32,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:32,275 INFO L82 PathProgramCache]: Analyzing trace with hash 196643718, now seen corresponding path program 21 times [2021-06-05 22:33:32,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:32,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64188743] [2021-06-05 22:33:32,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:32,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:32,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:32,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:32,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64188743] [2021-06-05 22:33:32,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64188743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:32,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388518948] [2021-06-05 22:33:32,299 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 [2021-06-05 22:33:32,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:33:32,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:32,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:33:32,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:32,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388518948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:32,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:32,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 22:33:32,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274738363] [2021-06-05 22:33:32,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:33:32,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:32,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:33:32,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:33:32,365 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) [2021-06-05 22:33:32,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:32,450 INFO L93 Difference]: Finished difference Result 498 states and 1529 transitions. [2021-06-05 22:33:32,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:33:32,450 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 [2021-06-05 22:33:32,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:32,451 INFO L225 Difference]: With dead ends: 498 [2021-06-05 22:33:32,451 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 22:33:32,451 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:33:32,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 22:33:32,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 311. [2021-06-05 22:33:32,454 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) [2021-06-05 22:33:32,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 983 transitions. [2021-06-05 22:33:32,455 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 983 transitions. Word has length 22 [2021-06-05 22:33:32,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:32,455 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 983 transitions. [2021-06-05 22:33:32,455 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) [2021-06-05 22:33:32,455 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 983 transitions. [2021-06-05 22:33:32,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:33:32,456 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:32,456 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:32,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-06-05 22:33:32,656 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:32,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:32,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1724048449, now seen corresponding path program 22 times [2021-06-05 22:33:32,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:32,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504773042] [2021-06-05 22:33:32,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:32,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:32,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:32,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504773042] [2021-06-05 22:33:32,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504773042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:32,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508128682] [2021-06-05 22:33:32,676 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 [2021-06-05 22:33:32,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:33:32,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:32,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:33:32,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:32,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:32,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508128682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:32,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:32,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 22:33:32,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049914232] [2021-06-05 22:33:32,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:33:32,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:32,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:33:32,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:33:32,755 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) [2021-06-05 22:33:32,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:32,849 INFO L93 Difference]: Finished difference Result 640 states and 1919 transitions. [2021-06-05 22:33:32,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:33:32,850 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 [2021-06-05 22:33:32,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:32,851 INFO L225 Difference]: With dead ends: 640 [2021-06-05 22:33:32,851 INFO L226 Difference]: Without dead ends: 640 [2021-06-05 22:33:32,851 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:33:32,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-06-05 22:33:32,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 368. [2021-06-05 22:33:32,855 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) [2021-06-05 22:33:32,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1186 transitions. [2021-06-05 22:33:32,856 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1186 transitions. Word has length 22 [2021-06-05 22:33:32,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:32,856 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1186 transitions. [2021-06-05 22:33:32,856 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) [2021-06-05 22:33:32,856 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1186 transitions. [2021-06-05 22:33:32,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:33:32,857 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:32,857 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:33,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:33,057 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:33,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:33,058 INFO L82 PathProgramCache]: Analyzing trace with hash 40343294, now seen corresponding path program 23 times [2021-06-05 22:33:33,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:33,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905993318] [2021-06-05 22:33:33,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:33,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:33,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:33,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905993318] [2021-06-05 22:33:33,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905993318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:33,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955252584] [2021-06-05 22:33:33,083 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 [2021-06-05 22:33:33,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:33:33,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:33,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:33:33,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:33,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955252584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:33,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:33,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 22:33:33,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631674207] [2021-06-05 22:33:33,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:33:33,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:33,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:33:33,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:33:33,173 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) [2021-06-05 22:33:33,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:33,321 INFO L93 Difference]: Finished difference Result 772 states and 2287 transitions. [2021-06-05 22:33:33,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:33:33,321 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 [2021-06-05 22:33:33,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:33,322 INFO L225 Difference]: With dead ends: 772 [2021-06-05 22:33:33,323 INFO L226 Difference]: Without dead ends: 728 [2021-06-05 22:33:33,323 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 104.8ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:33:33,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-06-05 22:33:33,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 506. [2021-06-05 22:33:33,329 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) [2021-06-05 22:33:33,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1634 transitions. [2021-06-05 22:33:33,330 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1634 transitions. Word has length 22 [2021-06-05 22:33:33,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:33,330 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1634 transitions. [2021-06-05 22:33:33,330 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) [2021-06-05 22:33:33,330 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1634 transitions. [2021-06-05 22:33:33,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:33:33,331 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:33,331 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:33,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-06-05 22:33:33,532 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:33,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:33,532 INFO L82 PathProgramCache]: Analyzing trace with hash 358278619, now seen corresponding path program 24 times [2021-06-05 22:33:33,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:33,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258205262] [2021-06-05 22:33:33,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:33,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:33,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:33,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:33,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258205262] [2021-06-05 22:33:33,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258205262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:33,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156610642] [2021-06-05 22:33:33,556 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 [2021-06-05 22:33:33,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:33:33,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:33,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:33:33,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:33,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:33,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156610642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:33,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:33,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 22:33:33,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053705588] [2021-06-05 22:33:33,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:33:33,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:33,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:33:33,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:33:33,627 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) [2021-06-05 22:33:33,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:33,739 INFO L93 Difference]: Finished difference Result 972 states and 2907 transitions. [2021-06-05 22:33:33,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:33:33,739 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 [2021-06-05 22:33:33,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:33,740 INFO L225 Difference]: With dead ends: 972 [2021-06-05 22:33:33,741 INFO L226 Difference]: Without dead ends: 972 [2021-06-05 22:33:33,741 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:33:33,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2021-06-05 22:33:33,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 557. [2021-06-05 22:33:33,748 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) [2021-06-05 22:33:33,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 1845 transitions. [2021-06-05 22:33:33,749 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 1845 transitions. Word has length 22 [2021-06-05 22:33:33,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:33,749 INFO L482 AbstractCegarLoop]: Abstraction has 557 states and 1845 transitions. [2021-06-05 22:33:33,749 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) [2021-06-05 22:33:33,749 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 1845 transitions. [2021-06-05 22:33:33,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:33:33,749 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:33,750 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:33,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:33,950 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:33,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:33,950 INFO L82 PathProgramCache]: Analyzing trace with hash -527046306, now seen corresponding path program 25 times [2021-06-05 22:33:33,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:33,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852528357] [2021-06-05 22:33:33,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:33,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:33,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:33,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852528357] [2021-06-05 22:33:33,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852528357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:33,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036208041] [2021-06-05 22:33:33,972 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 [2021-06-05 22:33:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:33,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:33:33,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:34,048 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:34,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036208041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:34,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:34,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 22:33:34,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148289552] [2021-06-05 22:33:34,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:33:34,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:34,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:33:34,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:33:34,049 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) [2021-06-05 22:33:34,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:34,201 INFO L93 Difference]: Finished difference Result 964 states and 2972 transitions. [2021-06-05 22:33:34,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:33:34,202 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 [2021-06-05 22:33:34,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:34,203 INFO L225 Difference]: With dead ends: 964 [2021-06-05 22:33:34,203 INFO L226 Difference]: Without dead ends: 916 [2021-06-05 22:33:34,204 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:33:34,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2021-06-05 22:33:34,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 606. [2021-06-05 22:33:34,212 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) [2021-06-05 22:33:34,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 2017 transitions. [2021-06-05 22:33:34,213 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 2017 transitions. Word has length 22 [2021-06-05 22:33:34,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:34,213 INFO L482 AbstractCegarLoop]: Abstraction has 606 states and 2017 transitions. [2021-06-05 22:33:34,213 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) [2021-06-05 22:33:34,213 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 2017 transitions. [2021-06-05 22:33:34,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:33:34,214 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:34,214 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:34,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 22:33:34,433 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:34,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:34,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1135425701, now seen corresponding path program 26 times [2021-06-05 22:33:34,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:34,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062684795] [2021-06-05 22:33:34,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:34,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:34,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:34,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062684795] [2021-06-05 22:33:34,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062684795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:34,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964836891] [2021-06-05 22:33:34,455 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) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:34,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:34,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:34,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:33:34,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:34,524 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:34,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964836891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:34,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:34,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 22:33:34,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901012499] [2021-06-05 22:33:34,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:33:34,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:34,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:33:34,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:33:34,524 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) [2021-06-05 22:33:34,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:34,669 INFO L93 Difference]: Finished difference Result 881 states and 2727 transitions. [2021-06-05 22:33:34,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:33:34,669 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 [2021-06-05 22:33:34,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:34,671 INFO L225 Difference]: With dead ends: 881 [2021-06-05 22:33:34,671 INFO L226 Difference]: Without dead ends: 871 [2021-06-05 22:33:34,671 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 95.7ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:33:34,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-06-05 22:33:34,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 612. [2021-06-05 22:33:34,680 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) [2021-06-05 22:33:34,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 2020 transitions. [2021-06-05 22:33:34,681 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 2020 transitions. Word has length 22 [2021-06-05 22:33:34,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:34,681 INFO L482 AbstractCegarLoop]: Abstraction has 612 states and 2020 transitions. [2021-06-05 22:33:34,681 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) [2021-06-05 22:33:34,681 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 2020 transitions. [2021-06-05 22:33:34,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:33:34,682 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:34,682 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:34,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 22:33:34,893 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:34,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:34,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1507852130, now seen corresponding path program 27 times [2021-06-05 22:33:34,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:34,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172086055] [2021-06-05 22:33:34,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:34,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:34,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:34,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:34,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172086055] [2021-06-05 22:33:34,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172086055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:34,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140138747] [2021-06-05 22:33:34,914 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 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 [2021-06-05 22:33:34,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:33:34,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:34,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:33:34,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:35,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140138747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:35,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:35,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 22:33:35,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244447225] [2021-06-05 22:33:35,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:33:35,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:35,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:33:35,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:33:35,013 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) [2021-06-05 22:33:35,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:35,127 INFO L93 Difference]: Finished difference Result 917 states and 2822 transitions. [2021-06-05 22:33:35,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:33:35,128 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 [2021-06-05 22:33:35,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:35,129 INFO L225 Difference]: With dead ends: 917 [2021-06-05 22:33:35,129 INFO L226 Difference]: Without dead ends: 893 [2021-06-05 22:33:35,129 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:33:35,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-06-05 22:33:35,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 606. [2021-06-05 22:33:35,146 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) [2021-06-05 22:33:35,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 2011 transitions. [2021-06-05 22:33:35,147 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 2011 transitions. Word has length 22 [2021-06-05 22:33:35,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:35,147 INFO L482 AbstractCegarLoop]: Abstraction has 606 states and 2011 transitions. [2021-06-05 22:33:35,147 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) [2021-06-05 22:33:35,147 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 2011 transitions. [2021-06-05 22:33:35,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:33:35,148 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:35,148 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:35,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:35,349 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:35,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:35,349 INFO L82 PathProgramCache]: Analyzing trace with hash 326583295, now seen corresponding path program 28 times [2021-06-05 22:33:35,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:35,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451795388] [2021-06-05 22:33:35,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:35,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:35,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:35,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451795388] [2021-06-05 22:33:35,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451795388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:35,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71946562] [2021-06-05 22:33:35,375 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 [2021-06-05 22:33:35,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:33:35,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:35,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:33:35,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:35,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:35,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71946562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:35,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:35,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:33:35,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654476623] [2021-06-05 22:33:35,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:33:35,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:35,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:33:35,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:33:35,465 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) [2021-06-05 22:33:35,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:35,603 INFO L93 Difference]: Finished difference Result 1221 states and 3751 transitions. [2021-06-05 22:33:35,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:33:35,603 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 [2021-06-05 22:33:35,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:35,605 INFO L225 Difference]: With dead ends: 1221 [2021-06-05 22:33:35,605 INFO L226 Difference]: Without dead ends: 1221 [2021-06-05 22:33:35,605 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 96.6ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:33:35,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-06-05 22:33:35,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 650. [2021-06-05 22:33:35,614 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) [2021-06-05 22:33:35,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 2182 transitions. [2021-06-05 22:33:35,616 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 2182 transitions. Word has length 22 [2021-06-05 22:33:35,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:35,616 INFO L482 AbstractCegarLoop]: Abstraction has 650 states and 2182 transitions. [2021-06-05 22:33:35,616 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) [2021-06-05 22:33:35,616 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 2182 transitions. [2021-06-05 22:33:35,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:33:35,617 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:35,617 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:35,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:35,821 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:35,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:35,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1657114921, now seen corresponding path program 29 times [2021-06-05 22:33:35,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:35,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348326414] [2021-06-05 22:33:35,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:35,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:35,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:35,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:35,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348326414] [2021-06-05 22:33:35,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348326414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:35,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614970760] [2021-06-05 22:33:35,837 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) [2021-06-05 22:33:35,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:33:35,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:35,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:33:35,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:35,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:35,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614970760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:35,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:35,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 22:33:35,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967579524] [2021-06-05 22:33:35,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:33:35,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:35,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:33:35,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:33:35,922 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) [2021-06-05 22:33:36,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:36,025 INFO L93 Difference]: Finished difference Result 1386 states and 4279 transitions. [2021-06-05 22:33:36,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:33:36,026 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 [2021-06-05 22:33:36,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:36,029 INFO L225 Difference]: With dead ends: 1386 [2021-06-05 22:33:36,029 INFO L226 Difference]: Without dead ends: 1386 [2021-06-05 22:33:36,029 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:33:36,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2021-06-05 22:33:36,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 762. [2021-06-05 22:33:36,042 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) [2021-06-05 22:33:36,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2624 transitions. [2021-06-05 22:33:36,044 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2624 transitions. Word has length 22 [2021-06-05 22:33:36,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:36,044 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 2624 transitions. [2021-06-05 22:33:36,044 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) [2021-06-05 22:33:36,044 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2624 transitions. [2021-06-05 22:33:36,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:33:36,045 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:36,045 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:36,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:36,260 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:36,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:36,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1144148055, now seen corresponding path program 30 times [2021-06-05 22:33:36,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:36,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362999835] [2021-06-05 22:33:36,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:36,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:36,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:33:36,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:36,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362999835] [2021-06-05 22:33:36,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362999835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:36,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718490658] [2021-06-05 22:33:36,283 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 [2021-06-05 22:33:36,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:33:36,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:36,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:33:36,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:36,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:36,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718490658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:36,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:36,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 22:33:36,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259094087] [2021-06-05 22:33:36,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:33:36,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:36,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:33:36,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:33:36,358 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) [2021-06-05 22:33:36,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:36,529 INFO L93 Difference]: Finished difference Result 1253 states and 3889 transitions. [2021-06-05 22:33:36,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:33:36,529 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 [2021-06-05 22:33:36,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:36,547 INFO L225 Difference]: With dead ends: 1253 [2021-06-05 22:33:36,547 INFO L226 Difference]: Without dead ends: 1244 [2021-06-05 22:33:36,547 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 107.3ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:33:36,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2021-06-05 22:33:36,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 762. [2021-06-05 22:33:36,557 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) [2021-06-05 22:33:36,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2602 transitions. [2021-06-05 22:33:36,559 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2602 transitions. Word has length 22 [2021-06-05 22:33:36,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:36,559 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 2602 transitions. [2021-06-05 22:33:36,559 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) [2021-06-05 22:33:36,559 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2602 transitions. [2021-06-05 22:33:36,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:33:36,560 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:36,560 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:36,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:36,777 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:36,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:36,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1294632791, now seen corresponding path program 31 times [2021-06-05 22:33:36,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:36,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948926458] [2021-06-05 22:33:36,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:36,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:36,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:36,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948926458] [2021-06-05 22:33:36,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948926458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:36,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306327185] [2021-06-05 22:33:36,807 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 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 [2021-06-05 22:33:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:36,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:33:36,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:36,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:36,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306327185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:36,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:36,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:33:36,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063739224] [2021-06-05 22:33:36,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:33:36,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:36,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:33:36,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:33:36,917 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) [2021-06-05 22:33:37,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:37,060 INFO L93 Difference]: Finished difference Result 1263 states and 4021 transitions. [2021-06-05 22:33:37,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:33:37,060 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 [2021-06-05 22:33:37,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:37,063 INFO L225 Difference]: With dead ends: 1263 [2021-06-05 22:33:37,064 INFO L226 Difference]: Without dead ends: 1251 [2021-06-05 22:33:37,064 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 121.4ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:33:37,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-06-05 22:33:37,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 847. [2021-06-05 22:33:37,075 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) [2021-06-05 22:33:37,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 2922 transitions. [2021-06-05 22:33:37,077 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 2922 transitions. Word has length 22 [2021-06-05 22:33:37,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:37,077 INFO L482 AbstractCegarLoop]: Abstraction has 847 states and 2922 transitions. [2021-06-05 22:33:37,077 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) [2021-06-05 22:33:37,077 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 2922 transitions. [2021-06-05 22:33:37,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:33:37,078 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:37,078 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:37,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:37,279 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:37,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:37,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1456964799, now seen corresponding path program 32 times [2021-06-05 22:33:37,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:37,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44865804] [2021-06-05 22:33:37,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:37,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:37,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:37,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44865804] [2021-06-05 22:33:37,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44865804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:37,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578480051] [2021-06-05 22:33:37,299 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 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 [2021-06-05 22:33:37,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:37,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:37,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:33:37,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:37,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:37,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578480051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:37,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:37,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:33:37,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428541235] [2021-06-05 22:33:37,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:33:37,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:37,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:33:37,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:33:37,393 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) [2021-06-05 22:33:37,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:37,515 INFO L93 Difference]: Finished difference Result 1246 states and 3991 transitions. [2021-06-05 22:33:37,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:33:37,516 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 [2021-06-05 22:33:37,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:37,518 INFO L225 Difference]: With dead ends: 1246 [2021-06-05 22:33:37,518 INFO L226 Difference]: Without dead ends: 1246 [2021-06-05 22:33:37,518 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:37,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2021-06-05 22:33:37,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 888. [2021-06-05 22:33:37,530 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) [2021-06-05 22:33:37,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3083 transitions. [2021-06-05 22:33:37,532 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3083 transitions. Word has length 22 [2021-06-05 22:33:37,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:37,532 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3083 transitions. [2021-06-05 22:33:37,532 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) [2021-06-05 22:33:37,532 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3083 transitions. [2021-06-05 22:33:37,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:33:37,534 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:37,534 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:37,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:37,745 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:37,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:37,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1570199292, now seen corresponding path program 33 times [2021-06-05 22:33:37,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:37,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457953605] [2021-06-05 22:33:37,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:37,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:37,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:37,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:37,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457953605] [2021-06-05 22:33:37,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457953605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:37,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930708567] [2021-06-05 22:33:37,766 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 [2021-06-05 22:33:37,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:33:37,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:37,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:33:37,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:37,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:37,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930708567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:37,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:37,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:33:37,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635520058] [2021-06-05 22:33:37,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:33:37,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:37,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:33:37,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:33:37,843 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) [2021-06-05 22:33:38,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:38,014 INFO L93 Difference]: Finished difference Result 1362 states and 4328 transitions. [2021-06-05 22:33:38,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:33:38,015 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 [2021-06-05 22:33:38,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:38,017 INFO L225 Difference]: With dead ends: 1362 [2021-06-05 22:33:38,017 INFO L226 Difference]: Without dead ends: 1275 [2021-06-05 22:33:38,017 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:33:38,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-06-05 22:33:38,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 976. [2021-06-05 22:33:38,040 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) [2021-06-05 22:33:38,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 3371 transitions. [2021-06-05 22:33:38,042 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 3371 transitions. Word has length 22 [2021-06-05 22:33:38,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:38,042 INFO L482 AbstractCegarLoop]: Abstraction has 976 states and 3371 transitions. [2021-06-05 22:33:38,042 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) [2021-06-05 22:33:38,042 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 3371 transitions. [2021-06-05 22:33:38,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:33:38,043 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:38,043 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:38,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:38,257 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:38,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:38,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1138465271, now seen corresponding path program 34 times [2021-06-05 22:33:38,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:38,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973652613] [2021-06-05 22:33:38,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:38,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:38,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:38,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973652613] [2021-06-05 22:33:38,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973652613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:38,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089573830] [2021-06-05 22:33:38,272 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) [2021-06-05 22:33:38,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:33:38,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:38,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:33:38,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:38,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:38,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089573830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:38,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:38,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 22:33:38,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766016696] [2021-06-05 22:33:38,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:33:38,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:38,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:33:38,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:33:38,348 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) [2021-06-05 22:33:38,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:38,484 INFO L93 Difference]: Finished difference Result 1340 states and 4319 transitions. [2021-06-05 22:33:38,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:33:38,484 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 [2021-06-05 22:33:38,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:38,487 INFO L225 Difference]: With dead ends: 1340 [2021-06-05 22:33:38,487 INFO L226 Difference]: Without dead ends: 1331 [2021-06-05 22:33:38,487 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:33:38,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2021-06-05 22:33:38,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 928. [2021-06-05 22:33:38,497 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) [2021-06-05 22:33:38,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 3172 transitions. [2021-06-05 22:33:38,499 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 3172 transitions. Word has length 22 [2021-06-05 22:33:38,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:38,499 INFO L482 AbstractCegarLoop]: Abstraction has 928 states and 3172 transitions. [2021-06-05 22:33:38,499 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) [2021-06-05 22:33:38,499 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 3172 transitions. [2021-06-05 22:33:38,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:33:38,500 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:38,501 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:38,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:38,701 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:38,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:38,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1510891700, now seen corresponding path program 35 times [2021-06-05 22:33:38,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:38,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576019809] [2021-06-05 22:33:38,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:38,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:38,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:38,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:38,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576019809] [2021-06-05 22:33:38,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576019809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:38,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131520899] [2021-06-05 22:33:38,719 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 [2021-06-05 22:33:38,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:33:38,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:38,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:33:38,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:38,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:38,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131520899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:38,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:38,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 22:33:38,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528481257] [2021-06-05 22:33:38,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:33:38,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:38,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:33:38,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:33:38,793 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) [2021-06-05 22:33:38,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:38,900 INFO L93 Difference]: Finished difference Result 1477 states and 4669 transitions. [2021-06-05 22:33:38,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:33:38,901 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 [2021-06-05 22:33:38,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:38,903 INFO L225 Difference]: With dead ends: 1477 [2021-06-05 22:33:38,903 INFO L226 Difference]: Without dead ends: 1435 [2021-06-05 22:33:38,903 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:33:38,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2021-06-05 22:33:38,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1075. [2021-06-05 22:33:38,918 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) [2021-06-05 22:33:38,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1075 states to 1075 states and 3686 transitions. [2021-06-05 22:33:38,920 INFO L78 Accepts]: Start accepts. Automaton has 1075 states and 3686 transitions. Word has length 22 [2021-06-05 22:33:38,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:38,920 INFO L482 AbstractCegarLoop]: Abstraction has 1075 states and 3686 transitions. [2021-06-05 22:33:38,920 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) [2021-06-05 22:33:38,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1075 states and 3686 transitions. [2021-06-05 22:33:38,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:33:38,921 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:38,921 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:39,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-06-05 22:33:39,133 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:39,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:39,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1381268681, now seen corresponding path program 36 times [2021-06-05 22:33:39,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:39,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502094940] [2021-06-05 22:33:39,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:39,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:39,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:39,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502094940] [2021-06-05 22:33:39,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502094940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:39,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838489414] [2021-06-05 22:33:39,151 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 [2021-06-05 22:33:39,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:33:39,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:39,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:33:39,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:39,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:39,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838489414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:39,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:39,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 22:33:39,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181897051] [2021-06-05 22:33:39,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:33:39,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:39,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:33:39,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:33:39,230 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) [2021-06-05 22:33:39,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:39,333 INFO L93 Difference]: Finished difference Result 1825 states and 5875 transitions. [2021-06-05 22:33:39,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:33:39,334 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 [2021-06-05 22:33:39,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:39,337 INFO L225 Difference]: With dead ends: 1825 [2021-06-05 22:33:39,337 INFO L226 Difference]: Without dead ends: 1825 [2021-06-05 22:33:39,337 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:33:39,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2021-06-05 22:33:39,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 1237. [2021-06-05 22:33:39,354 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) [2021-06-05 22:33:39,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 4330 transitions. [2021-06-05 22:33:39,366 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 4330 transitions. Word has length 22 [2021-06-05 22:33:39,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:39,366 INFO L482 AbstractCegarLoop]: Abstraction has 1237 states and 4330 transitions. [2021-06-05 22:33:39,366 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) [2021-06-05 22:33:39,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 4330 transitions. [2021-06-05 22:33:39,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:33:39,368 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:39,368 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:39,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:39,581 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:39,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:39,581 INFO L82 PathProgramCache]: Analyzing trace with hash 495943756, now seen corresponding path program 37 times [2021-06-05 22:33:39,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:39,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877329511] [2021-06-05 22:33:39,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:39,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:39,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:39,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877329511] [2021-06-05 22:33:39,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877329511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:39,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170698936] [2021-06-05 22:33:39,597 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 [2021-06-05 22:33:39,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:39,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:33:39,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:39,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:39,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170698936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:39,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:39,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 22:33:39,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379836656] [2021-06-05 22:33:39,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:33:39,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:39,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:33:39,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:33:39,749 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) [2021-06-05 22:33:39,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:39,901 INFO L93 Difference]: Finished difference Result 1507 states and 5030 transitions. [2021-06-05 22:33:39,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:33:39,902 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 [2021-06-05 22:33:39,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:39,904 INFO L225 Difference]: With dead ends: 1507 [2021-06-05 22:33:39,904 INFO L226 Difference]: Without dead ends: 1464 [2021-06-05 22:33:39,904 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 102.0ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:33:39,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-06-05 22:33:39,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1278. [2021-06-05 22:33:39,920 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) [2021-06-05 22:33:39,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 4513 transitions. [2021-06-05 22:33:39,922 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 4513 transitions. Word has length 22 [2021-06-05 22:33:39,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:39,922 INFO L482 AbstractCegarLoop]: Abstraction has 1278 states and 4513 transitions. [2021-06-05 22:33:39,922 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) [2021-06-05 22:33:39,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 4513 transitions. [2021-06-05 22:33:39,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:33:39,924 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:39,924 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:40,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 22:33:40,125 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:40,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:40,125 INFO L82 PathProgramCache]: Analyzing trace with hash -112435639, now seen corresponding path program 38 times [2021-06-05 22:33:40,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:40,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545064824] [2021-06-05 22:33:40,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:40,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:40,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:33:40,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:40,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545064824] [2021-06-05 22:33:40,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545064824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:40,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282938633] [2021-06-05 22:33:40,141 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 [2021-06-05 22:33:40,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:40,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:40,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:33:40,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:40,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:40,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282938633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:40,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:40,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 22:33:40,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598581590] [2021-06-05 22:33:40,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:33:40,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:40,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:33:40,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:33:40,218 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) [2021-06-05 22:33:40,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:40,351 INFO L93 Difference]: Finished difference Result 1841 states and 5998 transitions. [2021-06-05 22:33:40,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:33:40,351 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 [2021-06-05 22:33:40,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:40,354 INFO L225 Difference]: With dead ends: 1841 [2021-06-05 22:33:40,354 INFO L226 Difference]: Without dead ends: 1832 [2021-06-05 22:33:40,355 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:33:40,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-06-05 22:33:40,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1224. [2021-06-05 22:33:40,372 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) [2021-06-05 22:33:40,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 4272 transitions. [2021-06-05 22:33:40,374 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 4272 transitions. Word has length 22 [2021-06-05 22:33:40,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:40,375 INFO L482 AbstractCegarLoop]: Abstraction has 1224 states and 4272 transitions. [2021-06-05 22:33:40,375 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) [2021-06-05 22:33:40,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 4272 transitions. [2021-06-05 22:33:40,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:33:40,376 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:40,376 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:40,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:40,577 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:40,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:40,577 INFO L82 PathProgramCache]: Analyzing trace with hash 38049097, now seen corresponding path program 39 times [2021-06-05 22:33:40,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:40,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075061257] [2021-06-05 22:33:40,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:40,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:40,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:40,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:40,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075061257] [2021-06-05 22:33:40,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075061257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:40,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847670314] [2021-06-05 22:33:40,619 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 [2021-06-05 22:33:40,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:33:40,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:40,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:33:40,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:40,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:40,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847670314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:40,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:40,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:33:40,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936008747] [2021-06-05 22:33:40,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:33:40,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:40,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:33:40,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:33:40,697 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) [2021-06-05 22:33:40,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:40,860 INFO L93 Difference]: Finished difference Result 1811 states and 5904 transitions. [2021-06-05 22:33:40,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:33:40,861 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 [2021-06-05 22:33:40,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:40,863 INFO L225 Difference]: With dead ends: 1811 [2021-06-05 22:33:40,863 INFO L226 Difference]: Without dead ends: 1799 [2021-06-05 22:33:40,863 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:33:40,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2021-06-05 22:33:40,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1222. [2021-06-05 22:33:40,879 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) [2021-06-05 22:33:40,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 4265 transitions. [2021-06-05 22:33:40,881 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 4265 transitions. Word has length 22 [2021-06-05 22:33:40,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:40,881 INFO L482 AbstractCegarLoop]: Abstraction has 1222 states and 4265 transitions. [2021-06-05 22:33:40,881 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) [2021-06-05 22:33:40,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 4265 transitions. [2021-06-05 22:33:40,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:33:40,883 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:40,883 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:41,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 22:33:41,084 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:41,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:41,084 INFO L82 PathProgramCache]: Analyzing trace with hash 414299473, now seen corresponding path program 40 times [2021-06-05 22:33:41,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:41,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117337283] [2021-06-05 22:33:41,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:41,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:41,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:41,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:41,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117337283] [2021-06-05 22:33:41,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117337283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:41,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737124620] [2021-06-05 22:33:41,114 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 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 [2021-06-05 22:33:41,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:33:41,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:41,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:33:41,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:41,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:41,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737124620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:41,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:41,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 22:33:41,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481010512] [2021-06-05 22:33:41,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:33:41,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:41,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:33:41,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:33:41,185 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) [2021-06-05 22:33:41,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:41,312 INFO L93 Difference]: Finished difference Result 2184 states and 7117 transitions. [2021-06-05 22:33:41,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:33:41,312 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 [2021-06-05 22:33:41,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:41,316 INFO L225 Difference]: With dead ends: 2184 [2021-06-05 22:33:41,316 INFO L226 Difference]: Without dead ends: 2184 [2021-06-05 22:33:41,316 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:33:41,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2021-06-05 22:33:41,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 1282. [2021-06-05 22:33:41,336 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) [2021-06-05 22:33:41,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 4519 transitions. [2021-06-05 22:33:41,338 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 4519 transitions. Word has length 22 [2021-06-05 22:33:41,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:41,338 INFO L482 AbstractCegarLoop]: Abstraction has 1282 states and 4519 transitions. [2021-06-05 22:33:41,338 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) [2021-06-05 22:33:41,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 4519 transitions. [2021-06-05 22:33:41,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:33:41,340 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:41,340 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:41,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:41,556 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:41,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:41,556 INFO L82 PathProgramCache]: Analyzing trace with hash -254499376, now seen corresponding path program 41 times [2021-06-05 22:33:41,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:41,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352860532] [2021-06-05 22:33:41,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:41,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:41,574 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:41,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:41,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352860532] [2021-06-05 22:33:41,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352860532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:41,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111293864] [2021-06-05 22:33:41,574 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 [2021-06-05 22:33:41,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:33:41,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:41,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:33:41,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:41,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:41,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111293864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:41,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:41,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 22:33:41,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47008302] [2021-06-05 22:33:41,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:33:41,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:41,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:33:41,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:33:41,673 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) [2021-06-05 22:33:41,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:41,823 INFO L93 Difference]: Finished difference Result 1724 states and 5684 transitions. [2021-06-05 22:33:41,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:33:41,823 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 [2021-06-05 22:33:41,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:41,826 INFO L225 Difference]: With dead ends: 1724 [2021-06-05 22:33:41,826 INFO L226 Difference]: Without dead ends: 1690 [2021-06-05 22:33:41,826 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:33:41,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2021-06-05 22:33:41,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1281. [2021-06-05 22:33:41,845 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) [2021-06-05 22:33:41,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 4499 transitions. [2021-06-05 22:33:41,847 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 4499 transitions. Word has length 22 [2021-06-05 22:33:41,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:41,847 INFO L482 AbstractCegarLoop]: Abstraction has 1281 states and 4499 transitions. [2021-06-05 22:33:41,847 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) [2021-06-05 22:33:41,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 4499 transitions. [2021-06-05 22:33:41,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:33:41,849 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:41,849 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:42,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 22:33:42,065 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:42,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:42,065 INFO L82 PathProgramCache]: Analyzing trace with hash -811023835, now seen corresponding path program 42 times [2021-06-05 22:33:42,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:42,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070205812] [2021-06-05 22:33:42,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:42,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:42,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:42,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:42,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070205812] [2021-06-05 22:33:42,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070205812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:42,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688209057] [2021-06-05 22:33:42,083 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 [2021-06-05 22:33:42,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:33:42,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:42,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:33:42,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:42,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:42,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688209057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:42,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:42,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 22:33:42,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728243207] [2021-06-05 22:33:42,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:33:42,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:42,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:33:42,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:33:42,152 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) [2021-06-05 22:33:42,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:42,299 INFO L93 Difference]: Finished difference Result 2125 states and 6947 transitions. [2021-06-05 22:33:42,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:33:42,299 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 [2021-06-05 22:33:42,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:42,302 INFO L225 Difference]: With dead ends: 2125 [2021-06-05 22:33:42,302 INFO L226 Difference]: Without dead ends: 2116 [2021-06-05 22:33:42,302 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:33:42,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2116 states. [2021-06-05 22:33:42,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2116 to 1245. [2021-06-05 22:33:42,319 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) [2021-06-05 22:33:42,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 4336 transitions. [2021-06-05 22:33:42,321 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 4336 transitions. Word has length 22 [2021-06-05 22:33:42,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:42,321 INFO L482 AbstractCegarLoop]: Abstraction has 1245 states and 4336 transitions. [2021-06-05 22:33:42,321 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) [2021-06-05 22:33:42,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 4336 transitions. [2021-06-05 22:33:42,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:33:42,323 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:42,323 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:42,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 22:33:42,531 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:42,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:42,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1183450264, now seen corresponding path program 43 times [2021-06-05 22:33:42,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:42,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884166247] [2021-06-05 22:33:42,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:42,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:42,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:42,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:42,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884166247] [2021-06-05 22:33:42,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884166247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:42,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908941318] [2021-06-05 22:33:42,548 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 [2021-06-05 22:33:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:42,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:33:42,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:42,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:42,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908941318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:42,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:42,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 22:33:42,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899466208] [2021-06-05 22:33:42,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:33:42,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:42,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:33:42,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:33:42,621 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) [2021-06-05 22:33:42,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:42,742 INFO L93 Difference]: Finished difference Result 1497 states and 4889 transitions. [2021-06-05 22:33:42,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:33:42,742 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 [2021-06-05 22:33:42,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:42,744 INFO L225 Difference]: With dead ends: 1497 [2021-06-05 22:33:42,744 INFO L226 Difference]: Without dead ends: 1497 [2021-06-05 22:33:42,745 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 66.4ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:33:42,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2021-06-05 22:33:42,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1200. [2021-06-05 22:33:42,760 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) [2021-06-05 22:33:42,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 4117 transitions. [2021-06-05 22:33:42,762 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 4117 transitions. Word has length 22 [2021-06-05 22:33:42,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:42,762 INFO L482 AbstractCegarLoop]: Abstraction has 1200 states and 4117 transitions. [2021-06-05 22:33:42,762 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) [2021-06-05 22:33:42,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 4117 transitions. [2021-06-05 22:33:42,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:33:42,764 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:42,764 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:42,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 22:33:42,977 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:42,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:42,977 INFO L82 PathProgramCache]: Analyzing trace with hash -496279263, now seen corresponding path program 44 times [2021-06-05 22:33:42,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:42,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687811496] [2021-06-05 22:33:42,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:42,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:42,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:42,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687811496] [2021-06-05 22:33:42,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687811496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:42,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297187103] [2021-06-05 22:33:42,997 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 [2021-06-05 22:33:43,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:43,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:43,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:33:43,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:43,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297187103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:43,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:43,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 22:33:43,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425376535] [2021-06-05 22:33:43,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:33:43,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:43,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:33:43,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:33:43,067 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) [2021-06-05 22:33:43,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:43,193 INFO L93 Difference]: Finished difference Result 1698 states and 5519 transitions. [2021-06-05 22:33:43,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:33:43,193 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 [2021-06-05 22:33:43,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:43,195 INFO L225 Difference]: With dead ends: 1698 [2021-06-05 22:33:43,196 INFO L226 Difference]: Without dead ends: 1690 [2021-06-05 22:33:43,196 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:43,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2021-06-05 22:33:43,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1200. [2021-06-05 22:33:43,209 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) [2021-06-05 22:33:43,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 4111 transitions. [2021-06-05 22:33:43,212 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 4111 transitions. Word has length 22 [2021-06-05 22:33:43,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:43,219 INFO L482 AbstractCegarLoop]: Abstraction has 1200 states and 4111 transitions. [2021-06-05 22:33:43,219 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) [2021-06-05 22:33:43,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 4111 transitions. [2021-06-05 22:33:43,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:33:43,221 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:43,221 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:43,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:43,430 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:43,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:43,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1029973939, now seen corresponding path program 45 times [2021-06-05 22:33:43,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:43,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741049352] [2021-06-05 22:33:43,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:43,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:43,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:43,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741049352] [2021-06-05 22:33:43,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741049352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:43,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574776188] [2021-06-05 22:33:43,450 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 [2021-06-05 22:33:43,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:33:43,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:43,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:33:43,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:43,526 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:43,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574776188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:43,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:43,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 22:33:43,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564450686] [2021-06-05 22:33:43,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:33:43,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:43,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:33:43,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:33:43,527 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) [2021-06-05 22:33:43,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:43,587 INFO L93 Difference]: Finished difference Result 1428 states and 4807 transitions. [2021-06-05 22:33:43,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:33:43,588 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 [2021-06-05 22:33:43,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:43,589 INFO L225 Difference]: With dead ends: 1428 [2021-06-05 22:33:43,589 INFO L226 Difference]: Without dead ends: 1419 [2021-06-05 22:33:43,590 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:33:43,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2021-06-05 22:33:43,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 1199. [2021-06-05 22:33:43,602 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) [2021-06-05 22:33:43,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 4109 transitions. [2021-06-05 22:33:43,604 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 4109 transitions. Word has length 22 [2021-06-05 22:33:43,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:43,604 INFO L482 AbstractCegarLoop]: Abstraction has 1199 states and 4109 transitions. [2021-06-05 22:33:43,604 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) [2021-06-05 22:33:43,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 4109 transitions. [2021-06-05 22:33:43,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:33:43,606 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:43,606 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:43,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 22:33:43,822 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:43,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:43,822 INFO L82 PathProgramCache]: Analyzing trace with hash -736606674, now seen corresponding path program 46 times [2021-06-05 22:33:43,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:43,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079374924] [2021-06-05 22:33:43,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:43,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:43,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:43,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:43,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079374924] [2021-06-05 22:33:43,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079374924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:43,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29062666] [2021-06-05 22:33:43,842 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 [2021-06-05 22:33:43,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:33:43,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:43,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:33:43,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:43,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:43,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29062666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:43,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:43,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 22:33:43,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106605321] [2021-06-05 22:33:43,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:33:43,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:43,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:33:43,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:33:43,931 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) [2021-06-05 22:33:43,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:43,991 INFO L93 Difference]: Finished difference Result 1470 states and 4948 transitions. [2021-06-05 22:33:43,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:33:43,991 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 [2021-06-05 22:33:43,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:43,993 INFO L225 Difference]: With dead ends: 1470 [2021-06-05 22:33:43,993 INFO L226 Difference]: Without dead ends: 1470 [2021-06-05 22:33:43,993 INFO L810 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 [2021-06-05 22:33:43,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2021-06-05 22:33:44,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1208. [2021-06-05 22:33:44,008 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) [2021-06-05 22:33:44,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 4143 transitions. [2021-06-05 22:33:44,010 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 4143 transitions. Word has length 22 [2021-06-05 22:33:44,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:44,010 INFO L482 AbstractCegarLoop]: Abstraction has 1208 states and 4143 transitions. [2021-06-05 22:33:44,010 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) [2021-06-05 22:33:44,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 4143 transitions. [2021-06-05 22:33:44,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:33:44,012 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:44,012 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:44,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:44,228 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:44,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:44,228 INFO L82 PathProgramCache]: Analyzing trace with hash -834579384, now seen corresponding path program 47 times [2021-06-05 22:33:44,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:44,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912979419] [2021-06-05 22:33:44,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:44,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:44,425 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:44,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:44,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912979419] [2021-06-05 22:33:44,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912979419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:44,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507322311] [2021-06-05 22:33:44,426 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 [2021-06-05 22:33:44,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:33:44,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:44,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:33:44,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:44,607 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 [2021-06-05 22:33:44,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:44,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:44,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:44,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 22:33:44,636 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:44,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507322311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:44,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:44,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:33:44,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318179225] [2021-06-05 22:33:44,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:33:44,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:44,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:33:44,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:33:44,637 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) [2021-06-05 22:33:47,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:47,987 INFO L93 Difference]: Finished difference Result 4448 states and 15165 transitions. [2021-06-05 22:33:47,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 22:33:47,987 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 [2021-06-05 22:33:47,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:47,994 INFO L225 Difference]: With dead ends: 4448 [2021-06-05 22:33:47,994 INFO L226 Difference]: Without dead ends: 4426 [2021-06-05 22:33:47,995 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2192 ImplicationChecksByTransitivity, 2645.9ms TimeCoverageRelationStatistics Valid=1022, Invalid=5620, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 22:33:47,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4426 states. [2021-06-05 22:33:48,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4426 to 1303. [2021-06-05 22:33:48,028 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) [2021-06-05 22:33:48,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 4479 transitions. [2021-06-05 22:33:48,030 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 4479 transitions. Word has length 24 [2021-06-05 22:33:48,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:48,030 INFO L482 AbstractCegarLoop]: Abstraction has 1303 states and 4479 transitions. [2021-06-05 22:33:48,030 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) [2021-06-05 22:33:48,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 4479 transitions. [2021-06-05 22:33:48,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:33:48,032 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:48,032 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:48,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-05 22:33:48,233 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:48,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:48,233 INFO L82 PathProgramCache]: Analyzing trace with hash 965720304, now seen corresponding path program 48 times [2021-06-05 22:33:48,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:48,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932533389] [2021-06-05 22:33:48,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:48,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:48,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:48,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932533389] [2021-06-05 22:33:48,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932533389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:48,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497060250] [2021-06-05 22:33:48,462 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 [2021-06-05 22:33:48,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:33:48,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:48,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:33:48,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:48,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:48,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:48,673 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:48,674 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 [2021-06-05 22:33:48,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:48,720 INFO L628 ElimStorePlain]: treesize reduction 37, result has 49.3 percent of original size [2021-06-05 22:33:48,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:48,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:41 [2021-06-05 22:33:48,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:48,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497060250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:48,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:48,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-06-05 22:33:48,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625836984] [2021-06-05 22:33:48,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:33:48,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:48,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:33:48,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:33:48,839 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) [2021-06-05 22:33:51,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:51,722 INFO L93 Difference]: Finished difference Result 2829 states and 9372 transitions. [2021-06-05 22:33:51,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 22:33:51,723 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 [2021-06-05 22:33:51,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:51,726 INFO L225 Difference]: With dead ends: 2829 [2021-06-05 22:33:51,726 INFO L226 Difference]: Without dead ends: 2799 [2021-06-05 22:33:51,727 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1118 ImplicationChecksByTransitivity, 2295.2ms TimeCoverageRelationStatistics Valid=661, Invalid=3121, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 22:33:51,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2799 states. [2021-06-05 22:33:51,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2799 to 1316. [2021-06-05 22:33:51,747 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) [2021-06-05 22:33:51,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1316 states to 1316 states and 4524 transitions. [2021-06-05 22:33:51,749 INFO L78 Accepts]: Start accepts. Automaton has 1316 states and 4524 transitions. Word has length 24 [2021-06-05 22:33:51,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:51,749 INFO L482 AbstractCegarLoop]: Abstraction has 1316 states and 4524 transitions. [2021-06-05 22:33:51,749 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) [2021-06-05 22:33:51,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1316 states and 4524 transitions. [2021-06-05 22:33:51,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:33:51,751 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:51,751 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:51,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:51,952 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:51,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:51,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1186871304, now seen corresponding path program 49 times [2021-06-05 22:33:51,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:51,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066761748] [2021-06-05 22:33:51,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:51,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:52,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:52,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:52,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066761748] [2021-06-05 22:33:52,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066761748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:52,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672561363] [2021-06-05 22:33:52,178 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 [2021-06-05 22:33:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:52,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:33:52,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:52,378 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 [2021-06-05 22:33:52,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:52,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:52,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:52,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:33:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:52,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672561363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:52,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:52,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:33:52,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372387723] [2021-06-05 22:33:52,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:33:52,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:52,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:33:52,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:33:52,410 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) [2021-06-05 22:33:54,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:54,095 INFO L93 Difference]: Finished difference Result 2754 states and 9152 transitions. [2021-06-05 22:33:54,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:33:54,095 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 [2021-06-05 22:33:54,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:54,098 INFO L225 Difference]: With dead ends: 2754 [2021-06-05 22:33:54,098 INFO L226 Difference]: Without dead ends: 2720 [2021-06-05 22:33:54,099 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1282.1ms TimeCoverageRelationStatistics Valid=379, Invalid=2171, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:33:54,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2720 states. [2021-06-05 22:33:54,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2720 to 1330. [2021-06-05 22:33:54,116 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) [2021-06-05 22:33:54,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 4576 transitions. [2021-06-05 22:33:54,119 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 4576 transitions. Word has length 24 [2021-06-05 22:33:54,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:54,119 INFO L482 AbstractCegarLoop]: Abstraction has 1330 states and 4576 transitions. [2021-06-05 22:33:54,119 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) [2021-06-05 22:33:54,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 4576 transitions. [2021-06-05 22:33:54,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:33:54,121 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:54,121 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:54,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:54,330 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:54,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:54,330 INFO L82 PathProgramCache]: Analyzing trace with hash 749372208, now seen corresponding path program 50 times [2021-06-05 22:33:54,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:54,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539903583] [2021-06-05 22:33:54,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:54,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:54,510 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:54,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:54,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539903583] [2021-06-05 22:33:54,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539903583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:54,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970141423] [2021-06-05 22:33:54,510 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 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 [2021-06-05 22:33:54,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:54,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:54,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:33:54,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:54,720 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 [2021-06-05 22:33:54,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:54,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:54,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:54,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:15 [2021-06-05 22:33:54,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:54,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970141423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:54,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:54,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:33:54,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836645767] [2021-06-05 22:33:54,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:33:54,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:54,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:33:54,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:33:54,781 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) [2021-06-05 22:33:55,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:55,774 INFO L93 Difference]: Finished difference Result 2450 states and 8194 transitions. [2021-06-05 22:33:55,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:33:55,775 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 [2021-06-05 22:33:55,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:55,778 INFO L225 Difference]: With dead ends: 2450 [2021-06-05 22:33:55,779 INFO L226 Difference]: Without dead ends: 2391 [2021-06-05 22:33:55,779 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 827.8ms TimeCoverageRelationStatistics Valid=289, Invalid=1517, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:33:55,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-06-05 22:33:55,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1349. [2021-06-05 22:33:55,800 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) [2021-06-05 22:33:55,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 4635 transitions. [2021-06-05 22:33:55,802 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 4635 transitions. Word has length 24 [2021-06-05 22:33:55,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:55,802 INFO L482 AbstractCegarLoop]: Abstraction has 1349 states and 4635 transitions. [2021-06-05 22:33:55,802 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) [2021-06-05 22:33:55,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 4635 transitions. [2021-06-05 22:33:55,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:33:55,804 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:55,804 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:56,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:56,005 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:56,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:56,005 INFO L82 PathProgramCache]: Analyzing trace with hash 572830776, now seen corresponding path program 51 times [2021-06-05 22:33:56,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:56,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193579598] [2021-06-05 22:33:56,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:56,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:56,180 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:56,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:56,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193579598] [2021-06-05 22:33:56,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193579598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:56,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639069091] [2021-06-05 22:33:56,180 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 [2021-06-05 22:33:56,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:33:56,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:56,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:33:56,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:56,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:56,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:56,368 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:56,368 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 [2021-06-05 22:33:56,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:56,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:56,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:56,391 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:50 [2021-06-05 22:33:56,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:56,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639069091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:56,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:56,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 22:33:56,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053617858] [2021-06-05 22:33:56,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:33:56,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:56,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:33:56,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:33:56,567 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) [2021-06-05 22:33:58,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:58,470 INFO L93 Difference]: Finished difference Result 2472 states and 8251 transitions. [2021-06-05 22:33:58,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 22:33:58,470 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 [2021-06-05 22:33:58,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:58,473 INFO L225 Difference]: With dead ends: 2472 [2021-06-05 22:33:58,474 INFO L226 Difference]: Without dead ends: 2452 [2021-06-05 22:33:58,474 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1559.6ms TimeCoverageRelationStatistics Valid=478, Invalid=2602, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 22:33:58,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2021-06-05 22:33:58,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 1352. [2021-06-05 22:33:58,492 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) [2021-06-05 22:33:58,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 4644 transitions. [2021-06-05 22:33:58,495 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 4644 transitions. Word has length 24 [2021-06-05 22:33:58,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:58,495 INFO L482 AbstractCegarLoop]: Abstraction has 1352 states and 4644 transitions. [2021-06-05 22:33:58,495 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) [2021-06-05 22:33:58,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 4644 transitions. [2021-06-05 22:33:58,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:33:58,497 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:58,497 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:58,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:58,697 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:33:58,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:58,698 INFO L82 PathProgramCache]: Analyzing trace with hash -260907664, now seen corresponding path program 52 times [2021-06-05 22:33:58,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:58,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819192171] [2021-06-05 22:33:58,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:58,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:58,881 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:58,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:58,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819192171] [2021-06-05 22:33:58,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819192171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:58,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554956751] [2021-06-05 22:33:58,881 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 [2021-06-05 22:33:58,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:33:58,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:58,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:33:58,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:59,025 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 [2021-06-05 22:33:59,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:59,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:59,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:59,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:33:59,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:59,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554956751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:59,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:59,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:33:59,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408742917] [2021-06-05 22:33:59,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:33:59,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:59,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:33:59,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:33:59,083 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) [2021-06-05 22:34:00,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:00,078 INFO L93 Difference]: Finished difference Result 2456 states and 8262 transitions. [2021-06-05 22:34:00,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:34:00,078 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 [2021-06-05 22:34:00,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:00,082 INFO L225 Difference]: With dead ends: 2456 [2021-06-05 22:34:00,082 INFO L226 Difference]: Without dead ends: 2445 [2021-06-05 22:34:00,082 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 780.6ms TimeCoverageRelationStatistics Valid=271, Invalid=1451, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:34:00,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2021-06-05 22:34:00,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 1353. [2021-06-05 22:34:00,101 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) [2021-06-05 22:34:00,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 4651 transitions. [2021-06-05 22:34:00,103 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 4651 transitions. Word has length 24 [2021-06-05 22:34:00,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:00,103 INFO L482 AbstractCegarLoop]: Abstraction has 1353 states and 4651 transitions. [2021-06-05 22:34:00,103 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) [2021-06-05 22:34:00,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 4651 transitions. [2021-06-05 22:34:00,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:34:00,105 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:00,105 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:00,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:00,306 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:34:00,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:00,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1760921938, now seen corresponding path program 1 times [2021-06-05 22:34:00,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:00,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562911697] [2021-06-05 22:34:00,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:00,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:00,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:00,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:00,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562911697] [2021-06-05 22:34:00,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562911697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:00,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862644050] [2021-06-05 22:34:00,467 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 [2021-06-05 22:34:00,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:00,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:00,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:00,664 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 [2021-06-05 22:34:00,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:00,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:00,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:00,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 22:34:00,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:00,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862644050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:00,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:00,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:34:00,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041460629] [2021-06-05 22:34:00,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:34:00,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:00,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:34:00,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:34:00,700 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) [2021-06-05 22:34:03,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:03,656 INFO L93 Difference]: Finished difference Result 3805 states and 13021 transitions. [2021-06-05 22:34:03,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 22:34:03,657 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 [2021-06-05 22:34:03,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:03,663 INFO L225 Difference]: With dead ends: 3805 [2021-06-05 22:34:03,663 INFO L226 Difference]: Without dead ends: 3786 [2021-06-05 22:34:03,663 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 2283.5ms TimeCoverageRelationStatistics Valid=761, Invalid=4351, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 22:34:03,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2021-06-05 22:34:03,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 1388. [2021-06-05 22:34:03,693 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) [2021-06-05 22:34:03,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 4784 transitions. [2021-06-05 22:34:03,696 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 4784 transitions. Word has length 24 [2021-06-05 22:34:03,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:03,696 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 4784 transitions. [2021-06-05 22:34:03,696 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) [2021-06-05 22:34:03,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 4784 transitions. [2021-06-05 22:34:03,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:34:03,698 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:03,698 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:03,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:03,899 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:34:03,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:03,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1251406074, now seen corresponding path program 2 times [2021-06-05 22:34:03,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:03,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906632198] [2021-06-05 22:34:03,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:03,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:04,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:04,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:04,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906632198] [2021-06-05 22:34:04,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906632198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:04,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030510208] [2021-06-05 22:34:04,085 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 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 [2021-06-05 22:34:04,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:34:04,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:04,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:34:04,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:04,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:04,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:34:04,332 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 [2021-06-05 22:34:04,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:04,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:04,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:04,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 22:34:04,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:04,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030510208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:04,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:04,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:34:04,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517206995] [2021-06-05 22:34:04,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:34:04,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:04,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:34:04,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:34:04,367 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) [2021-06-05 22:34:05,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:05,846 INFO L93 Difference]: Finished difference Result 2357 states and 8002 transitions. [2021-06-05 22:34:05,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:34:05,847 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 [2021-06-05 22:34:05,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:05,850 INFO L225 Difference]: With dead ends: 2357 [2021-06-05 22:34:05,850 INFO L226 Difference]: Without dead ends: 2348 [2021-06-05 22:34:05,851 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1206.9ms TimeCoverageRelationStatistics Valid=376, Invalid=2276, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 22:34:05,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-06-05 22:34:05,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 1398. [2021-06-05 22:34:05,869 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) [2021-06-05 22:34:05,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4820 transitions. [2021-06-05 22:34:05,872 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4820 transitions. Word has length 24 [2021-06-05 22:34:05,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:05,872 INFO L482 AbstractCegarLoop]: Abstraction has 1398 states and 4820 transitions. [2021-06-05 22:34:05,872 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) [2021-06-05 22:34:05,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4820 transitions. [2021-06-05 22:34:05,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:34:05,874 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:05,874 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:06,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 22:34:06,074 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:34:06,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:06,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1041868694, now seen corresponding path program 3 times [2021-06-05 22:34:06,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:06,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872209385] [2021-06-05 22:34:06,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:06,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:06,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:06,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:06,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872209385] [2021-06-05 22:34:06,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872209385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:06,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768322143] [2021-06-05 22:34:06,293 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 [2021-06-05 22:34:06,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:34:06,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:06,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:06,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:06,468 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 [2021-06-05 22:34:06,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:06,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:06,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:06,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 22:34:06,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:06,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768322143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:06,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:06,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:34:06,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989841373] [2021-06-05 22:34:06,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:34:06,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:06,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:34:06,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:34:06,499 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) [2021-06-05 22:34:07,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:07,997 INFO L93 Difference]: Finished difference Result 2538 states and 8518 transitions. [2021-06-05 22:34:07,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:34:07,998 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 [2021-06-05 22:34:07,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:08,002 INFO L225 Difference]: With dead ends: 2538 [2021-06-05 22:34:08,002 INFO L226 Difference]: Without dead ends: 2509 [2021-06-05 22:34:08,003 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1135.4ms TimeCoverageRelationStatistics Valid=348, Invalid=2004, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 22:34:08,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2021-06-05 22:34:08,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 1408. [2021-06-05 22:34:08,031 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) [2021-06-05 22:34:08,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 4859 transitions. [2021-06-05 22:34:08,033 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 4859 transitions. Word has length 24 [2021-06-05 22:34:08,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:08,033 INFO L482 AbstractCegarLoop]: Abstraction has 1408 states and 4859 transitions. [2021-06-05 22:34:08,033 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) [2021-06-05 22:34:08,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 4859 transitions. [2021-06-05 22:34:08,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:34:08,035 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:08,035 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:08,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 22:34:08,252 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:34:08,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:08,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1524426856, now seen corresponding path program 4 times [2021-06-05 22:34:08,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:08,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463777062] [2021-06-05 22:34:08,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:08,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:08,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:08,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:08,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463777062] [2021-06-05 22:34:08,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463777062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:08,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199576372] [2021-06-05 22:34:08,434 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 [2021-06-05 22:34:08,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:34:08,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:08,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:08,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:08,601 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 [2021-06-05 22:34:08,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:08,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:08,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:08,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:34:08,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:08,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199576372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:08,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:08,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:34:08,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135406118] [2021-06-05 22:34:08,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:34:08,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:08,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:34:08,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:34:08,630 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) [2021-06-05 22:34:09,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:09,992 INFO L93 Difference]: Finished difference Result 2473 states and 8324 transitions. [2021-06-05 22:34:09,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:34:09,993 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 [2021-06-05 22:34:09,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:09,996 INFO L225 Difference]: With dead ends: 2473 [2021-06-05 22:34:09,996 INFO L226 Difference]: Without dead ends: 2444 [2021-06-05 22:34:09,997 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1062.7ms TimeCoverageRelationStatistics Valid=348, Invalid=1908, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:34:09,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2021-06-05 22:34:10,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 1402. [2021-06-05 22:34:10,015 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) [2021-06-05 22:34:10,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 4844 transitions. [2021-06-05 22:34:10,018 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 4844 transitions. Word has length 24 [2021-06-05 22:34:10,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:10,018 INFO L482 AbstractCegarLoop]: Abstraction has 1402 states and 4844 transitions. [2021-06-05 22:34:10,018 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) [2021-06-05 22:34:10,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 4844 transitions. [2021-06-05 22:34:10,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:34:10,020 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:10,020 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:10,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:10,221 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:34:10,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:10,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1742390580, now seen corresponding path program 5 times [2021-06-05 22:34:10,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:10,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967638136] [2021-06-05 22:34:10,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:10,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:10,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:10,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967638136] [2021-06-05 22:34:10,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967638136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:10,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418489787] [2021-06-05 22:34:10,369 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 [2021-06-05 22:34:10,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:34:10,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:10,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:10,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:10,502 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 [2021-06-05 22:34:10,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:10,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:10,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:10,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:34:10,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:10,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418489787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:10,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:10,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:34:10,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802207192] [2021-06-05 22:34:10,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:34:10,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:10,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:34:10,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:34:10,554 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) [2021-06-05 22:34:11,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:11,300 INFO L93 Difference]: Finished difference Result 2298 states and 7819 transitions. [2021-06-05 22:34:11,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:34:11,301 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 [2021-06-05 22:34:11,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:11,304 INFO L225 Difference]: With dead ends: 2298 [2021-06-05 22:34:11,305 INFO L226 Difference]: Without dead ends: 2289 [2021-06-05 22:34:11,305 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 582.6ms TimeCoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:34:11,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2021-06-05 22:34:11,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 1415. [2021-06-05 22:34:11,325 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) [2021-06-05 22:34:11,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1415 states to 1415 states and 4884 transitions. [2021-06-05 22:34:11,327 INFO L78 Accepts]: Start accepts. Automaton has 1415 states and 4884 transitions. Word has length 24 [2021-06-05 22:34:11,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:11,327 INFO L482 AbstractCegarLoop]: Abstraction has 1415 states and 4884 transitions. [2021-06-05 22:34:11,327 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) [2021-06-05 22:34:11,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1415 states and 4884 transitions. [2021-06-05 22:34:11,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:34:11,329 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:11,329 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:11,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:11,530 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:34:11,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:11,530 INFO L82 PathProgramCache]: Analyzing trace with hash 2065976758, now seen corresponding path program 6 times [2021-06-05 22:34:11,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:11,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975787326] [2021-06-05 22:34:11,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:11,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:11,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975787326] [2021-06-05 22:34:11,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975787326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:11,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744926524] [2021-06-05 22:34:11,696 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 [2021-06-05 22:34:11,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:34:11,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:11,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:34:11,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:11,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:11,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:11,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:11,918 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:11,918 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 [2021-06-05 22:34:11,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:11,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:11,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:11,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:88 [2021-06-05 22:34:12,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:12,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744926524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:12,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:12,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 22:34:12,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506929356] [2021-06-05 22:34:12,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:34:12,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:12,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:34:12,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:34:12,056 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) [2021-06-05 22:34:13,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:13,774 INFO L93 Difference]: Finished difference Result 2286 states and 7759 transitions. [2021-06-05 22:34:13,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:34:13,774 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 [2021-06-05 22:34:13,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:13,778 INFO L225 Difference]: With dead ends: 2286 [2021-06-05 22:34:13,778 INFO L226 Difference]: Without dead ends: 2277 [2021-06-05 22:34:13,778 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1570.7ms TimeCoverageRelationStatistics Valid=540, Invalid=2322, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 22:34:13,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2021-06-05 22:34:13,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 1418. [2021-06-05 22:34:13,796 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) [2021-06-05 22:34:13,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 4897 transitions. [2021-06-05 22:34:13,799 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 4897 transitions. Word has length 24 [2021-06-05 22:34:13,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:13,799 INFO L482 AbstractCegarLoop]: Abstraction has 1418 states and 4897 transitions. [2021-06-05 22:34:13,799 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) [2021-06-05 22:34:13,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 4897 transitions. [2021-06-05 22:34:13,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:34:13,801 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:13,801 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:14,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:14,001 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:34:14,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:14,002 INFO L82 PathProgramCache]: Analyzing trace with hash -543246416, now seen corresponding path program 7 times [2021-06-05 22:34:14,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:14,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164685625] [2021-06-05 22:34:14,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:14,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:14,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:14,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:14,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164685625] [2021-06-05 22:34:14,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164685625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:14,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701565848] [2021-06-05 22:34:14,146 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 [2021-06-05 22:34:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:14,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:14,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:14,281 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 [2021-06-05 22:34:14,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:14,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:14,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:14,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:34:14,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:14,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701565848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:14,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:14,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:34:14,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490765696] [2021-06-05 22:34:14,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:34:14,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:14,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:34:14,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:34:14,325 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) [2021-06-05 22:34:15,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:15,050 INFO L93 Difference]: Finished difference Result 2241 states and 7629 transitions. [2021-06-05 22:34:15,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:34:15,050 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 [2021-06-05 22:34:15,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:15,053 INFO L225 Difference]: With dead ends: 2241 [2021-06-05 22:34:15,053 INFO L226 Difference]: Without dead ends: 2230 [2021-06-05 22:34:15,053 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 572.4ms TimeCoverageRelationStatistics Valid=178, Invalid=1012, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:34:15,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2021-06-05 22:34:15,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 1410. [2021-06-05 22:34:15,069 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) [2021-06-05 22:34:15,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 4871 transitions. [2021-06-05 22:34:15,071 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 4871 transitions. Word has length 24 [2021-06-05 22:34:15,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:15,071 INFO L482 AbstractCegarLoop]: Abstraction has 1410 states and 4871 transitions. [2021-06-05 22:34:15,071 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) [2021-06-05 22:34:15,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 4871 transitions. [2021-06-05 22:34:15,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:34:15,073 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:15,073 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:15,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 22:34:15,274 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:34:15,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:15,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1059751936, now seen corresponding path program 53 times [2021-06-05 22:34:15,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:15,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956642621] [2021-06-05 22:34:15,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:15,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:15,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:15,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:15,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956642621] [2021-06-05 22:34:15,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956642621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:15,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515770397] [2021-06-05 22:34:15,453 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 [2021-06-05 22:34:15,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:34:15,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:15,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:15,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:15,624 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 [2021-06-05 22:34:15,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:15,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:15,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:15,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:34:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:15,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515770397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:15,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:15,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:34:15,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533532608] [2021-06-05 22:34:15,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:34:15,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:15,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:34:15,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:34:15,662 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) [2021-06-05 22:34:16,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:16,798 INFO L93 Difference]: Finished difference Result 2280 states and 7676 transitions. [2021-06-05 22:34:16,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:34:16,798 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 [2021-06-05 22:34:16,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:16,801 INFO L225 Difference]: With dead ends: 2280 [2021-06-05 22:34:16,802 INFO L226 Difference]: Without dead ends: 2270 [2021-06-05 22:34:16,802 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 731.0ms TimeCoverageRelationStatistics Valid=245, Invalid=1647, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:34:16,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2021-06-05 22:34:16,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 1412. [2021-06-05 22:34:16,819 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) [2021-06-05 22:34:16,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 4877 transitions. [2021-06-05 22:34:16,821 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 4877 transitions. Word has length 24 [2021-06-05 22:34:16,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:16,821 INFO L482 AbstractCegarLoop]: Abstraction has 1412 states and 4877 transitions. [2021-06-05 22:34:16,821 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) [2021-06-05 22:34:16,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 4877 transitions. [2021-06-05 22:34:16,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:34:16,823 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:16,823 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:17,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 22:34:17,024 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:34:17,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:17,024 INFO L82 PathProgramCache]: Analyzing trace with hash -448330122, now seen corresponding path program 54 times [2021-06-05 22:34:17,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:17,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815919726] [2021-06-05 22:34:17,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:17,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:17,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:17,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815919726] [2021-06-05 22:34:17,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815919726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:17,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948667183] [2021-06-05 22:34:17,215 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 [2021-06-05 22:34:17,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:34:17,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:17,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:34:17,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:17,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:17,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:17,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:17,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:17,495 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 [2021-06-05 22:34:17,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:34:17,524 INFO L628 ElimStorePlain]: treesize reduction 29, result has 52.5 percent of original size [2021-06-05 22:34:17,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:17,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:21 [2021-06-05 22:34:17,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:17,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948667183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:17,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:17,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:34:17,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421697511] [2021-06-05 22:34:17,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:34:17,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:17,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:34:17,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:34:17,601 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) [2021-06-05 22:34:18,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:18,591 INFO L93 Difference]: Finished difference Result 2222 states and 7429 transitions. [2021-06-05 22:34:18,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:34:18,591 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 [2021-06-05 22:34:18,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:18,595 INFO L225 Difference]: With dead ends: 2222 [2021-06-05 22:34:18,595 INFO L226 Difference]: Without dead ends: 2190 [2021-06-05 22:34:18,595 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 736.7ms TimeCoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:34:18,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2190 states. [2021-06-05 22:34:18,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2190 to 1424. [2021-06-05 22:34:18,615 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) [2021-06-05 22:34:18,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 4918 transitions. [2021-06-05 22:34:18,618 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 4918 transitions. Word has length 24 [2021-06-05 22:34:18,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:18,618 INFO L482 AbstractCegarLoop]: Abstraction has 1424 states and 4918 transitions. [2021-06-05 22:34:18,618 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) [2021-06-05 22:34:18,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 4918 transitions. [2021-06-05 22:34:18,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:34:18,620 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:18,620 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:18,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:18,833 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:34:18,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:18,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1487913390, now seen corresponding path program 55 times [2021-06-05 22:34:18,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:18,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037770526] [2021-06-05 22:34:18,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:18,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:18,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:18,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:18,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037770526] [2021-06-05 22:34:18,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037770526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:18,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479722019] [2021-06-05 22:34:18,997 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 [2021-06-05 22:34:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:19,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:19,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:19,159 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 [2021-06-05 22:34:19,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:19,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:19,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:19,169 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:34:19,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:19,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479722019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:19,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:19,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:34:19,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107755254] [2021-06-05 22:34:19,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:34:19,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:19,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:34:19,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:34:19,195 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) [2021-06-05 22:34:20,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:20,227 INFO L93 Difference]: Finished difference Result 2213 states and 7447 transitions. [2021-06-05 22:34:20,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:34:20,227 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 [2021-06-05 22:34:20,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:20,230 INFO L225 Difference]: With dead ends: 2213 [2021-06-05 22:34:20,231 INFO L226 Difference]: Without dead ends: 2191 [2021-06-05 22:34:20,231 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 719.2ms TimeCoverageRelationStatistics Valid=235, Invalid=1487, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:34:20,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2191 states. [2021-06-05 22:34:20,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2191 to 1426. [2021-06-05 22:34:20,248 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) [2021-06-05 22:34:20,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 4930 transitions. [2021-06-05 22:34:20,260 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 4930 transitions. Word has length 24 [2021-06-05 22:34:20,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:20,260 INFO L482 AbstractCegarLoop]: Abstraction has 1426 states and 4930 transitions. [2021-06-05 22:34:20,260 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) [2021-06-05 22:34:20,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 4930 transitions. [2021-06-05 22:34:20,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:34:20,262 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:20,262 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:20,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 22:34:20,467 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:34:20,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:20,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1311371958, now seen corresponding path program 56 times [2021-06-05 22:34:20,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:20,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886107097] [2021-06-05 22:34:20,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:20,681 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:20,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:20,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886107097] [2021-06-05 22:34:20,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886107097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:20,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945137070] [2021-06-05 22:34:20,681 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 [2021-06-05 22:34:20,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:34:20,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:20,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:34:20,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:20,830 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:20,830 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 [2021-06-05 22:34:20,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:20,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:20,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:20,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:34:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:20,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945137070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:20,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:20,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:34:20,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757078052] [2021-06-05 22:34:20,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:34:20,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:20,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:34:20,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:34:20,930 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) [2021-06-05 22:34:21,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:21,825 INFO L93 Difference]: Finished difference Result 2144 states and 7220 transitions. [2021-06-05 22:34:21,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:34:21,826 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 [2021-06-05 22:34:21,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:21,829 INFO L225 Difference]: With dead ends: 2144 [2021-06-05 22:34:21,829 INFO L226 Difference]: Without dead ends: 2134 [2021-06-05 22:34:21,829 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 747.5ms TimeCoverageRelationStatistics Valid=251, Invalid=1555, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:34:21,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2134 states. [2021-06-05 22:34:21,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2134 to 1432. [2021-06-05 22:34:21,846 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) [2021-06-05 22:34:21,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 4945 transitions. [2021-06-05 22:34:21,848 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 4945 transitions. Word has length 24 [2021-06-05 22:34:21,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:21,849 INFO L482 AbstractCegarLoop]: Abstraction has 1432 states and 4945 transitions. [2021-06-05 22:34:21,849 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) [2021-06-05 22:34:21,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 4945 transitions. [2021-06-05 22:34:21,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:34:21,850 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:21,850 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:22,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 22:34:22,054 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:34:22,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:22,054 INFO L82 PathProgramCache]: Analyzing trace with hash 477633518, now seen corresponding path program 57 times [2021-06-05 22:34:22,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:22,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874294691] [2021-06-05 22:34:22,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:22,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:22,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:22,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:22,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874294691] [2021-06-05 22:34:22,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874294691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:22,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239777558] [2021-06-05 22:34:22,208 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 [2021-06-05 22:34:22,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:34:22,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:22,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:22,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:22,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:22,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:22,360 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 [2021-06-05 22:34:22,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:22,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:22,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:22,377 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:46 [2021-06-05 22:34:22,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:22,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239777558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:22,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:22,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 22:34:22,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591286063] [2021-06-05 22:34:22,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:34:22,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:22,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:34:22,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:34:22,539 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) [2021-06-05 22:34:24,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:24,201 INFO L93 Difference]: Finished difference Result 2174 states and 7260 transitions. [2021-06-05 22:34:24,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 22:34:24,202 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 [2021-06-05 22:34:24,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:24,205 INFO L225 Difference]: With dead ends: 2174 [2021-06-05 22:34:24,205 INFO L226 Difference]: Without dead ends: 2163 [2021-06-05 22:34:24,205 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1303.8ms TimeCoverageRelationStatistics Valid=384, Invalid=2268, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 22:34:24,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-06-05 22:34:24,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1456. [2021-06-05 22:34:24,225 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) [2021-06-05 22:34:24,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5027 transitions. [2021-06-05 22:34:24,227 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5027 transitions. Word has length 24 [2021-06-05 22:34:24,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:24,227 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 5027 transitions. [2021-06-05 22:34:24,227 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) [2021-06-05 22:34:24,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5027 transitions. [2021-06-05 22:34:24,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:34:24,229 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:24,229 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:24,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 22:34:24,446 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:34:24,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:24,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1259467318, now seen corresponding path program 58 times [2021-06-05 22:34:24,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:24,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487470671] [2021-06-05 22:34:24,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:24,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:24,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:24,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:24,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487470671] [2021-06-05 22:34:24,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487470671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:24,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190113324] [2021-06-05 22:34:24,590 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) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:24,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:34:24,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:24,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:24,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:24,767 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 [2021-06-05 22:34:24,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:24,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:24,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:24,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:34:24,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:24,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190113324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:24,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:24,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:34:24,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934827522] [2021-06-05 22:34:24,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:34:24,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:24,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:34:24,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:34:24,810 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) [2021-06-05 22:34:25,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:25,528 INFO L93 Difference]: Finished difference Result 2091 states and 7062 transitions. [2021-06-05 22:34:25,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:34:25,528 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 [2021-06-05 22:34:25,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:25,532 INFO L225 Difference]: With dead ends: 2091 [2021-06-05 22:34:25,532 INFO L226 Difference]: Without dead ends: 2080 [2021-06-05 22:34:25,532 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 535.6ms TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:34:25,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2021-06-05 22:34:25,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 1453. [2021-06-05 22:34:25,551 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) [2021-06-05 22:34:25,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 5021 transitions. [2021-06-05 22:34:25,554 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 5021 transitions. Word has length 24 [2021-06-05 22:34:25,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:25,554 INFO L482 AbstractCegarLoop]: Abstraction has 1453 states and 5021 transitions. [2021-06-05 22:34:25,554 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) [2021-06-05 22:34:25,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 5021 transitions. [2021-06-05 22:34:25,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:34:25,556 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:25,556 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:25,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:25,756 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:34:25,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:25,757 INFO L82 PathProgramCache]: Analyzing trace with hash -291281526, now seen corresponding path program 8 times [2021-06-05 22:34:25,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:25,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931466831] [2021-06-05 22:34:25,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:25,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:25,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:25,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:25,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931466831] [2021-06-05 22:34:25,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931466831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:25,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763261060] [2021-06-05 22:34:25,926 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 [2021-06-05 22:34:25,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:34:25,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:25,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:34:25,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:26,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:26,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:34:26,182 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 [2021-06-05 22:34:26,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:26,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:26,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:26,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 22:34:26,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:26,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763261060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:26,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:26,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:34:26,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312692190] [2021-06-05 22:34:26,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:34:26,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:26,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:34:26,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:34:26,218 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) [2021-06-05 22:34:27,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:27,252 INFO L93 Difference]: Finished difference Result 2199 states and 7401 transitions. [2021-06-05 22:34:27,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:34:27,253 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 [2021-06-05 22:34:27,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:27,256 INFO L225 Difference]: With dead ends: 2199 [2021-06-05 22:34:27,256 INFO L226 Difference]: Without dead ends: 2190 [2021-06-05 22:34:27,256 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 698.3ms TimeCoverageRelationStatistics Valid=206, Invalid=1434, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:34:27,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2190 states. [2021-06-05 22:34:27,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2190 to 1453. [2021-06-05 22:34:27,274 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) [2021-06-05 22:34:27,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 5021 transitions. [2021-06-05 22:34:27,277 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 5021 transitions. Word has length 24 [2021-06-05 22:34:27,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:27,277 INFO L482 AbstractCegarLoop]: Abstraction has 1453 states and 5021 transitions. [2021-06-05 22:34:27,277 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) [2021-06-05 22:34:27,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 5021 transitions. [2021-06-05 22:34:27,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:34:27,278 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:27,278 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:27,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:27,479 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:34:27,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:27,479 INFO L82 PathProgramCache]: Analyzing trace with hash -500818906, now seen corresponding path program 9 times [2021-06-05 22:34:27,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:27,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757531112] [2021-06-05 22:34:27,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:27,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:27,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:27,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:27,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757531112] [2021-06-05 22:34:27,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757531112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:27,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668342481] [2021-06-05 22:34:27,655 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) [2021-06-05 22:34:27,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:34:27,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:27,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:27,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:27,832 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 [2021-06-05 22:34:27,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:27,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:27,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:27,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:34:27,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:27,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668342481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:27,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:27,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:34:27,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43366563] [2021-06-05 22:34:27,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:34:27,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:27,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:34:27,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:34:27,862 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) [2021-06-05 22:34:29,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:29,137 INFO L93 Difference]: Finished difference Result 2243 states and 7546 transitions. [2021-06-05 22:34:29,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:34:29,137 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 [2021-06-05 22:34:29,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:29,141 INFO L225 Difference]: With dead ends: 2243 [2021-06-05 22:34:29,141 INFO L226 Difference]: Without dead ends: 2224 [2021-06-05 22:34:29,141 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 774.3ms TimeCoverageRelationStatistics Valid=241, Invalid=1565, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:34:29,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2224 states. [2021-06-05 22:34:29,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2224 to 1462. [2021-06-05 22:34:29,158 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) [2021-06-05 22:34:29,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 5054 transitions. [2021-06-05 22:34:29,160 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 5054 transitions. Word has length 24 [2021-06-05 22:34:29,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:29,160 INFO L482 AbstractCegarLoop]: Abstraction has 1462 states and 5054 transitions. [2021-06-05 22:34:29,161 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) [2021-06-05 22:34:29,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 5054 transitions. [2021-06-05 22:34:29,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:34:29,162 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:29,162 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:29,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:29,363 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:34:29,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:29,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1227852840, now seen corresponding path program 10 times [2021-06-05 22:34:29,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:29,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355232554] [2021-06-05 22:34:29,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:29,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:29,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:29,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:29,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355232554] [2021-06-05 22:34:29,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355232554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:29,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532441867] [2021-06-05 22:34:29,558 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 [2021-06-05 22:34:29,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:34:29,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:29,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:29,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:29,716 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 [2021-06-05 22:34:29,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:29,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:29,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:29,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 22:34:29,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:29,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532441867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:29,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:29,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:34:29,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490014927] [2021-06-05 22:34:29,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:34:29,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:29,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:34:29,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:34:29,745 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) [2021-06-05 22:34:30,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:30,723 INFO L93 Difference]: Finished difference Result 2195 states and 7404 transitions. [2021-06-05 22:34:30,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:34:30,723 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 [2021-06-05 22:34:30,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:30,726 INFO L225 Difference]: With dead ends: 2195 [2021-06-05 22:34:30,726 INFO L226 Difference]: Without dead ends: 2176 [2021-06-05 22:34:30,727 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 741.9ms TimeCoverageRelationStatistics Valid=235, Invalid=1487, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:34:30,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-06-05 22:34:30,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 1460. [2021-06-05 22:34:30,745 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) [2021-06-05 22:34:30,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 5051 transitions. [2021-06-05 22:34:30,747 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 5051 transitions. Word has length 24 [2021-06-05 22:34:30,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:30,747 INFO L482 AbstractCegarLoop]: Abstraction has 1460 states and 5051 transitions. [2021-06-05 22:34:30,747 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) [2021-06-05 22:34:30,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 5051 transitions. [2021-06-05 22:34:30,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:34:30,749 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:30,749 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:30,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 22:34:30,950 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:34:30,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:30,950 INFO L82 PathProgramCache]: Analyzing trace with hash 199702980, now seen corresponding path program 11 times [2021-06-05 22:34:30,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:30,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378510521] [2021-06-05 22:34:30,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:30,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:31,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:31,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:31,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378510521] [2021-06-05 22:34:31,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378510521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:31,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566503350] [2021-06-05 22:34:31,097 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 [2021-06-05 22:34:31,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:34:31,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:31,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:31,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:31,239 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 [2021-06-05 22:34:31,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:31,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:31,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:31,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:34:31,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:31,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566503350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:31,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:31,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:34:31,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867205266] [2021-06-05 22:34:31,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:34:31,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:31,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:34:31,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:34:31,287 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) [2021-06-05 22:34:31,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:31,994 INFO L93 Difference]: Finished difference Result 2165 states and 7322 transitions. [2021-06-05 22:34:31,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:34:31,995 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 [2021-06-05 22:34:31,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:31,998 INFO L225 Difference]: With dead ends: 2165 [2021-06-05 22:34:31,998 INFO L226 Difference]: Without dead ends: 2156 [2021-06-05 22:34:31,998 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 532.3ms TimeCoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:34:31,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2021-06-05 22:34:32,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 1469. [2021-06-05 22:34:32,014 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) [2021-06-05 22:34:32,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 5079 transitions. [2021-06-05 22:34:32,017 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 5079 transitions. Word has length 24 [2021-06-05 22:34:32,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:32,017 INFO L482 AbstractCegarLoop]: Abstraction has 1469 states and 5079 transitions. [2021-06-05 22:34:32,017 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) [2021-06-05 22:34:32,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 5079 transitions. [2021-06-05 22:34:32,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:34:32,018 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:32,018 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:32,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 22:34:32,219 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:34:32,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:32,219 INFO L82 PathProgramCache]: Analyzing trace with hash 523289158, now seen corresponding path program 12 times [2021-06-05 22:34:32,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:32,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501953879] [2021-06-05 22:34:32,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:32,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:32,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:32,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501953879] [2021-06-05 22:34:32,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501953879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:32,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462324603] [2021-06-05 22:34:32,371 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 [2021-06-05 22:34:32,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:34:32,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:32,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:34:32,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:32,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:32,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:32,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:32,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:32,559 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 [2021-06-05 22:34:32,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:32,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:32,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:32,588 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:88 [2021-06-05 22:34:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:32,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462324603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:32,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:32,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 22:34:32,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020011095] [2021-06-05 22:34:32,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:34:32,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:32,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:34:32,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:34:32,694 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) [2021-06-05 22:34:33,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:33,728 INFO L93 Difference]: Finished difference Result 2142 states and 7233 transitions. [2021-06-05 22:34:33,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:34:33,728 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 [2021-06-05 22:34:33,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:33,732 INFO L225 Difference]: With dead ends: 2142 [2021-06-05 22:34:33,732 INFO L226 Difference]: Without dead ends: 2133 [2021-06-05 22:34:33,732 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 829.7ms TimeCoverageRelationStatistics Valid=284, Invalid=1522, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:34:33,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2021-06-05 22:34:33,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 1481. [2021-06-05 22:34:33,765 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) [2021-06-05 22:34:33,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 5120 transitions. [2021-06-05 22:34:33,768 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 5120 transitions. Word has length 24 [2021-06-05 22:34:33,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:33,768 INFO L482 AbstractCegarLoop]: Abstraction has 1481 states and 5120 transitions. [2021-06-05 22:34:33,768 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) [2021-06-05 22:34:33,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 5120 transitions. [2021-06-05 22:34:33,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:34:33,770 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:33,770 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:33,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 22:34:33,986 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:34:33,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:33,986 INFO L82 PathProgramCache]: Analyzing trace with hash -2085934016, now seen corresponding path program 13 times [2021-06-05 22:34:33,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:33,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424545566] [2021-06-05 22:34:33,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:33,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:34,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:34,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:34,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424545566] [2021-06-05 22:34:34,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424545566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:34,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063024733] [2021-06-05 22:34:34,130 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 [2021-06-05 22:34:34,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:34,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:34,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:34,281 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 [2021-06-05 22:34:34,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:34,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:34,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:34,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:34:34,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:34,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063024733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:34,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:34,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:34:34,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780562211] [2021-06-05 22:34:34,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:34:34,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:34,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:34:34,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:34:34,333 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) [2021-06-05 22:34:35,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:35,030 INFO L93 Difference]: Finished difference Result 2094 states and 7096 transitions. [2021-06-05 22:34:35,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:34:35,031 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 [2021-06-05 22:34:35,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:35,034 INFO L225 Difference]: With dead ends: 2094 [2021-06-05 22:34:35,034 INFO L226 Difference]: Without dead ends: 2083 [2021-06-05 22:34:35,034 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 530.5ms TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:34:35,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2021-06-05 22:34:35,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 1473. [2021-06-05 22:34:35,050 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) [2021-06-05 22:34:35,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 5096 transitions. [2021-06-05 22:34:35,053 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 5096 transitions. Word has length 24 [2021-06-05 22:34:35,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:35,053 INFO L482 AbstractCegarLoop]: Abstraction has 1473 states and 5096 transitions. [2021-06-05 22:34:35,053 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) [2021-06-05 22:34:35,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 5096 transitions. [2021-06-05 22:34:35,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:34:35,055 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:35,055 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:35,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:35,255 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:34:35,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:35,256 INFO L82 PathProgramCache]: Analyzing trace with hash 721304348, now seen corresponding path program 59 times [2021-06-05 22:34:35,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:35,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452362925] [2021-06-05 22:34:35,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:35,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:35,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:35,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:35,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452362925] [2021-06-05 22:34:35,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452362925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:35,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712204172] [2021-06-05 22:34:35,429 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 [2021-06-05 22:34:35,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:34:35,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:35,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:35,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:35,633 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 [2021-06-05 22:34:35,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:35,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:35,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:35,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:34:35,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:35,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712204172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:35,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:35,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:34:35,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139914190] [2021-06-05 22:34:35,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:34:35,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:35,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:34:35,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:34:35,669 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) [2021-06-05 22:34:37,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:37,474 INFO L93 Difference]: Finished difference Result 2359 states and 7859 transitions. [2021-06-05 22:34:37,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 22:34:37,474 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 [2021-06-05 22:34:37,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:37,478 INFO L225 Difference]: With dead ends: 2359 [2021-06-05 22:34:37,478 INFO L226 Difference]: Without dead ends: 2317 [2021-06-05 22:34:37,478 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1400.8ms TimeCoverageRelationStatistics Valid=405, Invalid=2675, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 22:34:37,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2021-06-05 22:34:37,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 1490. [2021-06-05 22:34:37,497 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) [2021-06-05 22:34:37,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 5145 transitions. [2021-06-05 22:34:37,499 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 5145 transitions. Word has length 24 [2021-06-05 22:34:37,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:37,499 INFO L482 AbstractCegarLoop]: Abstraction has 1490 states and 5145 transitions. [2021-06-05 22:34:37,499 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) [2021-06-05 22:34:37,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 5145 transitions. [2021-06-05 22:34:37,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:34:37,501 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:37,501 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:37,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:37,702 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:34:37,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:37,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1985601830, now seen corresponding path program 60 times [2021-06-05 22:34:37,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:37,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555957295] [2021-06-05 22:34:37,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:37,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:37,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:37,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:37,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555957295] [2021-06-05 22:34:37,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555957295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:37,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63908326] [2021-06-05 22:34:37,874 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 [2021-06-05 22:34:37,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:34:37,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:37,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:37,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:38,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:38,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:38,108 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:38,109 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 [2021-06-05 22:34:38,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:34:38,140 INFO L628 ElimStorePlain]: treesize reduction 31, result has 44.6 percent of original size [2021-06-05 22:34:38,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:38,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2021-06-05 22:34:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:38,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63908326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:38,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:38,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:34:38,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801483712] [2021-06-05 22:34:38,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:34:38,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:38,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:34:38,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:34:38,205 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) [2021-06-05 22:34:39,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:39,608 INFO L93 Difference]: Finished difference Result 2233 states and 7485 transitions. [2021-06-05 22:34:39,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:34:39,609 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 [2021-06-05 22:34:39,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:39,612 INFO L225 Difference]: With dead ends: 2233 [2021-06-05 22:34:39,612 INFO L226 Difference]: Without dead ends: 2187 [2021-06-05 22:34:39,612 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 983.9ms TimeCoverageRelationStatistics Valid=237, Invalid=1743, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:34:39,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2021-06-05 22:34:39,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 1495. [2021-06-05 22:34:39,629 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) [2021-06-05 22:34:39,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 5163 transitions. [2021-06-05 22:34:39,632 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 5163 transitions. Word has length 24 [2021-06-05 22:34:39,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:39,632 INFO L482 AbstractCegarLoop]: Abstraction has 1495 states and 5163 transitions. [2021-06-05 22:34:39,632 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) [2021-06-05 22:34:39,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 5163 transitions. [2021-06-05 22:34:39,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:34:39,633 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:39,634 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:39,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-06-05 22:34:39,834 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:34:39,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:39,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1809060398, now seen corresponding path program 61 times [2021-06-05 22:34:39,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:39,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527569401] [2021-06-05 22:34:39,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:39,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:39,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:39,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:39,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527569401] [2021-06-05 22:34:39,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527569401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:39,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230227791] [2021-06-05 22:34:39,977 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 [2021-06-05 22:34:40,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:40,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:40,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:40,120 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 [2021-06-05 22:34:40,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:40,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:40,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:40,124 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:34:40,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:40,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230227791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:40,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:40,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:34:40,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656811340] [2021-06-05 22:34:40,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:34:40,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:40,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:34:40,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:34:40,168 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) [2021-06-05 22:34:41,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:41,261 INFO L93 Difference]: Finished difference Result 2155 states and 7270 transitions. [2021-06-05 22:34:41,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:34:41,261 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 [2021-06-05 22:34:41,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:41,264 INFO L225 Difference]: With dead ends: 2155 [2021-06-05 22:34:41,264 INFO L226 Difference]: Without dead ends: 2125 [2021-06-05 22:34:41,265 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 892.6ms TimeCoverageRelationStatistics Valid=336, Invalid=1920, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:34:41,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2125 states. [2021-06-05 22:34:41,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2125 to 1497. [2021-06-05 22:34:41,282 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) [2021-06-05 22:34:41,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 5170 transitions. [2021-06-05 22:34:41,284 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 5170 transitions. Word has length 24 [2021-06-05 22:34:41,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:41,284 INFO L482 AbstractCegarLoop]: Abstraction has 1497 states and 5170 transitions. [2021-06-05 22:34:41,284 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) [2021-06-05 22:34:41,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 5170 transitions. [2021-06-05 22:34:41,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:34:41,286 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:41,286 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:41,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 22:34:41,487 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:34:41,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:41,487 INFO L82 PathProgramCache]: Analyzing trace with hash 975321958, now seen corresponding path program 62 times [2021-06-05 22:34:41,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:41,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581721936] [2021-06-05 22:34:41,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:41,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:41,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:41,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:41,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581721936] [2021-06-05 22:34:41,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581721936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:41,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305472634] [2021-06-05 22:34:41,637 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 [2021-06-05 22:34:41,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:34:41,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:41,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:34:41,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:41,786 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:41,787 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 [2021-06-05 22:34:41,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:41,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:41,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:41,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:34:41,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:41,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305472634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:41,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:41,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:34:41,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104852263] [2021-06-05 22:34:41,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:34:41,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:41,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:34:41,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:34:41,887 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) [2021-06-05 22:34:43,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:43,160 INFO L93 Difference]: Finished difference Result 2128 states and 7174 transitions. [2021-06-05 22:34:43,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:34:43,160 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 [2021-06-05 22:34:43,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:43,163 INFO L225 Difference]: With dead ends: 2128 [2021-06-05 22:34:43,163 INFO L226 Difference]: Without dead ends: 2097 [2021-06-05 22:34:43,163 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 990.6ms TimeCoverageRelationStatistics Valid=297, Invalid=2055, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 22:34:43,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-06-05 22:34:43,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1499. [2021-06-05 22:34:43,178 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) [2021-06-05 22:34:43,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 5174 transitions. [2021-06-05 22:34:43,180 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 5174 transitions. Word has length 24 [2021-06-05 22:34:43,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:43,181 INFO L482 AbstractCegarLoop]: Abstraction has 1499 states and 5174 transitions. [2021-06-05 22:34:43,181 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) [2021-06-05 22:34:43,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 5174 transitions. [2021-06-05 22:34:43,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:34:43,182 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:43,182 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:43,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:43,383 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:34:43,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:43,384 INFO L82 PathProgramCache]: Analyzing trace with hash -846298030, now seen corresponding path program 14 times [2021-06-05 22:34:43,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:43,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708312925] [2021-06-05 22:34:43,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:43,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:43,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:43,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:43,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708312925] [2021-06-05 22:34:43,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708312925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:43,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193216177] [2021-06-05 22:34:43,611 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 [2021-06-05 22:34:43,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:34:43,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:43,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:34:43,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:43,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:43,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:34:43,861 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 [2021-06-05 22:34:43,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:43,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:43,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:43,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 22:34:43,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:43,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193216177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:43,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:43,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:34:43,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033036240] [2021-06-05 22:34:43,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:34:43,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:43,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:34:43,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:34:43,910 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) [2021-06-05 22:34:45,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:45,380 INFO L93 Difference]: Finished difference Result 2335 states and 7758 transitions. [2021-06-05 22:34:45,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 22:34:45,380 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 [2021-06-05 22:34:45,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:45,384 INFO L225 Difference]: With dead ends: 2335 [2021-06-05 22:34:45,384 INFO L226 Difference]: Without dead ends: 2285 [2021-06-05 22:34:45,384 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1206.8ms TimeCoverageRelationStatistics Valid=381, Invalid=2589, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 22:34:45,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-05 22:34:45,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 1503. [2021-06-05 22:34:45,401 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) [2021-06-05 22:34:45,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 5189 transitions. [2021-06-05 22:34:45,404 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 5189 transitions. Word has length 24 [2021-06-05 22:34:45,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:45,404 INFO L482 AbstractCegarLoop]: Abstraction has 1503 states and 5189 transitions. [2021-06-05 22:34:45,404 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) [2021-06-05 22:34:45,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 5189 transitions. [2021-06-05 22:34:45,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:34:45,406 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:45,406 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:45,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-06-05 22:34:45,606 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:34:45,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:45,607 INFO L82 PathProgramCache]: Analyzing trace with hash 882373716, now seen corresponding path program 15 times [2021-06-05 22:34:45,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:45,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615947876] [2021-06-05 22:34:45,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:45,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:45,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:45,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615947876] [2021-06-05 22:34:45,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615947876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:45,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10489495] [2021-06-05 22:34:45,798 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 [2021-06-05 22:34:45,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:34:45,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:45,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:34:45,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:45,984 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:45,984 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 [2021-06-05 22:34:45,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:45,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:45,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:45,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 22:34:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:46,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10489495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:46,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:46,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:34:46,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653118213] [2021-06-05 22:34:46,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:34:46,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:46,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:34:46,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:34:46,069 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) [2021-06-05 22:34:46,328 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2021-06-05 22:34:48,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:48,509 INFO L93 Difference]: Finished difference Result 2316 states and 7730 transitions. [2021-06-05 22:34:48,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 22:34:48,510 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 [2021-06-05 22:34:48,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:48,513 INFO L225 Difference]: With dead ends: 2316 [2021-06-05 22:34:48,513 INFO L226 Difference]: Without dead ends: 2277 [2021-06-05 22:34:48,514 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 2090.2ms TimeCoverageRelationStatistics Valid=572, Invalid=3588, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 22:34:48,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2021-06-05 22:34:48,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 1507. [2021-06-05 22:34:48,538 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) [2021-06-05 22:34:48,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 5204 transitions. [2021-06-05 22:34:48,541 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 5204 transitions. Word has length 24 [2021-06-05 22:34:48,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:48,541 INFO L482 AbstractCegarLoop]: Abstraction has 1507 states and 5204 transitions. [2021-06-05 22:34:48,541 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) [2021-06-05 22:34:48,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 5204 transitions. [2021-06-05 22:34:48,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:34:48,543 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:48,543 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:48,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:48,743 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:34:48,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:48,744 INFO L82 PathProgramCache]: Analyzing trace with hash -145776144, now seen corresponding path program 16 times [2021-06-05 22:34:48,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:48,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306916591] [2021-06-05 22:34:48,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:48,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:48,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:48,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:48,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306916591] [2021-06-05 22:34:48,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306916591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:48,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349204063] [2021-06-05 22:34:48,902 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 [2021-06-05 22:34:48,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:34:48,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:48,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:48,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:49,052 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 [2021-06-05 22:34:49,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:49,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:49,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:49,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:34:49,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:49,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349204063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:49,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:49,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:34:49,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835556813] [2021-06-05 22:34:49,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:34:49,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:49,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:34:49,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:34:49,100 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) [2021-06-05 22:34:50,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:50,244 INFO L93 Difference]: Finished difference Result 2152 states and 7265 transitions. [2021-06-05 22:34:50,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:34:50,244 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 [2021-06-05 22:34:50,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:50,248 INFO L225 Difference]: With dead ends: 2152 [2021-06-05 22:34:50,248 INFO L226 Difference]: Without dead ends: 2126 [2021-06-05 22:34:50,248 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 940.9ms TimeCoverageRelationStatistics Valid=350, Invalid=2002, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 22:34:50,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-06-05 22:34:50,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1510. [2021-06-05 22:34:50,266 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) [2021-06-05 22:34:50,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 5212 transitions. [2021-06-05 22:34:50,268 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 5212 transitions. Word has length 24 [2021-06-05 22:34:50,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:50,268 INFO L482 AbstractCegarLoop]: Abstraction has 1510 states and 5212 transitions. [2021-06-05 22:34:50,268 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) [2021-06-05 22:34:50,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 5212 transitions. [2021-06-05 22:34:50,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:34:50,270 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:50,270 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:50,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:50,482 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:34:50,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:50,483 INFO L82 PathProgramCache]: Analyzing trace with hash 177810034, now seen corresponding path program 17 times [2021-06-05 22:34:50,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:50,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106967595] [2021-06-05 22:34:50,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:50,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:50,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:50,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106967595] [2021-06-05 22:34:50,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106967595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:50,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433371967] [2021-06-05 22:34:50,631 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) [2021-06-05 22:34:50,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:34:50,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:50,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:50,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:50,781 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 [2021-06-05 22:34:50,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:50,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:50,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:50,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:34:50,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:50,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433371967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:50,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:50,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:34:50,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899037867] [2021-06-05 22:34:50,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:34:50,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:50,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:34:50,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:34:50,826 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) [2021-06-05 22:34:51,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:51,893 INFO L93 Difference]: Finished difference Result 2129 states and 7196 transitions. [2021-06-05 22:34:51,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:34:51,894 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 [2021-06-05 22:34:51,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:51,897 INFO L225 Difference]: With dead ends: 2129 [2021-06-05 22:34:51,897 INFO L226 Difference]: Without dead ends: 2104 [2021-06-05 22:34:51,897 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 809.0ms TimeCoverageRelationStatistics Valid=255, Invalid=1551, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:34:51,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-06-05 22:34:51,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1507. [2021-06-05 22:34:51,915 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) [2021-06-05 22:34:51,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 5202 transitions. [2021-06-05 22:34:51,918 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 5202 transitions. Word has length 24 [2021-06-05 22:34:51,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:51,918 INFO L482 AbstractCegarLoop]: Abstraction has 1507 states and 5202 transitions. [2021-06-05 22:34:51,918 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) [2021-06-05 22:34:51,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 5202 transitions. [2021-06-05 22:34:51,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:34:51,920 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:51,920 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:52,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:52,121 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:34:52,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:52,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1468982144, now seen corresponding path program 63 times [2021-06-05 22:34:52,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:52,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658364034] [2021-06-05 22:34:52,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:52,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:52,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:52,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:52,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658364034] [2021-06-05 22:34:52,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658364034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:52,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470554416] [2021-06-05 22:34:52,288 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 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 [2021-06-05 22:34:52,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:34:52,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:52,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:52,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:52,454 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 [2021-06-05 22:34:52,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:52,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:52,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:52,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:34:52,487 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:52,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470554416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:52,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:52,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:34:52,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791173881] [2021-06-05 22:34:52,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:34:52,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:52,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:34:52,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:34:52,488 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) [2021-06-05 22:34:54,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:54,801 INFO L93 Difference]: Finished difference Result 2395 states and 7988 transitions. [2021-06-05 22:34:54,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 22:34:54,801 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 [2021-06-05 22:34:54,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:54,804 INFO L225 Difference]: With dead ends: 2395 [2021-06-05 22:34:54,804 INFO L226 Difference]: Without dead ends: 2353 [2021-06-05 22:34:54,805 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 1783.6ms TimeCoverageRelationStatistics Valid=583, Invalid=3973, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 22:34:54,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2021-06-05 22:34:54,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 1512. [2021-06-05 22:34:54,822 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) [2021-06-05 22:34:54,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 5217 transitions. [2021-06-05 22:34:54,824 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 5217 transitions. Word has length 24 [2021-06-05 22:34:54,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:54,824 INFO L482 AbstractCegarLoop]: Abstraction has 1512 states and 5217 transitions. [2021-06-05 22:34:54,824 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) [2021-06-05 22:34:54,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 5217 transitions. [2021-06-05 22:34:54,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:34:54,826 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:54,826 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:55,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 22:34:55,042 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:34:55,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:55,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1686407030, now seen corresponding path program 64 times [2021-06-05 22:34:55,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:55,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502772819] [2021-06-05 22:34:55,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:55,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:55,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:55,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:55,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502772819] [2021-06-05 22:34:55,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502772819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:55,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090269262] [2021-06-05 22:34:55,318 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) [2021-06-05 22:34:55,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:34:55,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:55,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:55,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:55,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-05 22:34:55,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:55,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:55,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:55,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:34:55,579 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:55,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090269262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:55,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:55,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:34:55,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730439757] [2021-06-05 22:34:55,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:34:55,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:55,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:34:55,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:34:55,580 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) [2021-06-05 22:34:57,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:57,364 INFO L93 Difference]: Finished difference Result 2231 states and 7499 transitions. [2021-06-05 22:34:57,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 22:34:57,364 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 [2021-06-05 22:34:57,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:57,367 INFO L225 Difference]: With dead ends: 2231 [2021-06-05 22:34:57,367 INFO L226 Difference]: Without dead ends: 2201 [2021-06-05 22:34:57,368 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 1569.4ms TimeCoverageRelationStatistics Valid=477, Invalid=2829, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 22:34:57,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2201 states. [2021-06-05 22:34:57,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2201 to 1514. [2021-06-05 22:34:57,385 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) [2021-06-05 22:34:57,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 5224 transitions. [2021-06-05 22:34:57,408 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 5224 transitions. Word has length 24 [2021-06-05 22:34:57,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:57,408 INFO L482 AbstractCegarLoop]: Abstraction has 1514 states and 5224 transitions. [2021-06-05 22:34:57,408 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) [2021-06-05 22:34:57,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 5224 transitions. [2021-06-05 22:34:57,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:34:57,410 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:57,411 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:57,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 22:34:57,627 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:34:57,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:57,627 INFO L82 PathProgramCache]: Analyzing trace with hash 852668590, now seen corresponding path program 65 times [2021-06-05 22:34:57,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:57,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930788622] [2021-06-05 22:34:57,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:57,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:57,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:57,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:57,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930788622] [2021-06-05 22:34:57,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930788622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:57,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095075411] [2021-06-05 22:34:57,825 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 [2021-06-05 22:34:57,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:34:57,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:57,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:57,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:58,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:58,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:34:58,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:34:58,061 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 [2021-06-05 22:34:58,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:58,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:58,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:58,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:7 [2021-06-05 22:34:58,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:58,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095075411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:58,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:58,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:34:58,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755315416] [2021-06-05 22:34:58,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:34:58,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:58,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:34:58,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:34:58,152 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) [2021-06-05 22:35:00,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:00,241 INFO L93 Difference]: Finished difference Result 2184 states and 7332 transitions. [2021-06-05 22:35:00,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 22:35:00,241 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 [2021-06-05 22:35:00,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:00,245 INFO L225 Difference]: With dead ends: 2184 [2021-06-05 22:35:00,245 INFO L226 Difference]: Without dead ends: 2150 [2021-06-05 22:35:00,245 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 1832.3ms TimeCoverageRelationStatistics Valid=513, Invalid=3777, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 22:35:00,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-06-05 22:35:00,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 1509. [2021-06-05 22:35:00,262 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) [2021-06-05 22:35:00,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1509 states to 1509 states and 5208 transitions. [2021-06-05 22:35:00,265 INFO L78 Accepts]: Start accepts. Automaton has 1509 states and 5208 transitions. Word has length 24 [2021-06-05 22:35:00,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:00,265 INFO L482 AbstractCegarLoop]: Abstraction has 1509 states and 5208 transitions. [2021-06-05 22:35:00,265 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) [2021-06-05 22:35:00,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1509 states and 5208 transitions. [2021-06-05 22:35:00,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:35:00,267 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:00,267 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:00,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:00,467 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:35:00,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:00,468 INFO L82 PathProgramCache]: Analyzing trace with hash 2111150986, now seen corresponding path program 18 times [2021-06-05 22:35:00,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:00,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755856427] [2021-06-05 22:35:00,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:00,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:00,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:00,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:00,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755856427] [2021-06-05 22:35:00,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755856427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:00,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053566547] [2021-06-05 22:35:00,648 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 [2021-06-05 22:35:00,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:35:00,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:00,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:35:00,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:00,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:35:00,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:35:00,864 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 [2021-06-05 22:35:00,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:00,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:00,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:00,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 22:35:00,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:00,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053566547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:00,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:00,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:35:00,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415019402] [2021-06-05 22:35:00,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:35:00,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:00,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:35:00,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:35:00,897 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) [2021-06-05 22:35:03,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:03,314 INFO L93 Difference]: Finished difference Result 2330 states and 7756 transitions. [2021-06-05 22:35:03,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 22:35:03,314 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 [2021-06-05 22:35:03,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:03,318 INFO L225 Difference]: With dead ends: 2330 [2021-06-05 22:35:03,318 INFO L226 Difference]: Without dead ends: 2272 [2021-06-05 22:35:03,318 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 1849.3ms TimeCoverageRelationStatistics Valid=553, Invalid=3479, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 22:35:03,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2021-06-05 22:35:03,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 1512. [2021-06-05 22:35:03,335 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) [2021-06-05 22:35:03,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 5218 transitions. [2021-06-05 22:35:03,338 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 5218 transitions. Word has length 24 [2021-06-05 22:35:03,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:03,338 INFO L482 AbstractCegarLoop]: Abstraction has 1512 states and 5218 transitions. [2021-06-05 22:35:03,338 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) [2021-06-05 22:35:03,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 5218 transitions. [2021-06-05 22:35:03,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:35:03,340 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:03,340 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:03,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:03,541 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:35:03,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:03,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1083001126, now seen corresponding path program 19 times [2021-06-05 22:35:03,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:03,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287397065] [2021-06-05 22:35:03,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:03,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:03,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:03,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287397065] [2021-06-05 22:35:03,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287397065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:03,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663826307] [2021-06-05 22:35:03,731 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 [2021-06-05 22:35:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:03,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:35:03,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:03,869 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 [2021-06-05 22:35:03,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:03,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:03,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:03,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:35:03,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:03,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663826307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:03,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:03,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:35:03,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710028661] [2021-06-05 22:35:03,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:35:03,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:03,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:35:03,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:35:03,919 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) [2021-06-05 22:35:05,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:05,634 INFO L93 Difference]: Finished difference Result 2195 states and 7393 transitions. [2021-06-05 22:35:05,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 22:35:05,634 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 [2021-06-05 22:35:05,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:05,637 INFO L225 Difference]: With dead ends: 2195 [2021-06-05 22:35:05,637 INFO L226 Difference]: Without dead ends: 2169 [2021-06-05 22:35:05,638 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 1376.0ms TimeCoverageRelationStatistics Valid=418, Invalid=2234, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 22:35:05,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2021-06-05 22:35:05,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 1515. [2021-06-05 22:35:05,656 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) [2021-06-05 22:35:05,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 5226 transitions. [2021-06-05 22:35:05,659 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 5226 transitions. Word has length 24 [2021-06-05 22:35:05,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:05,659 INFO L482 AbstractCegarLoop]: Abstraction has 1515 states and 5226 transitions. [2021-06-05 22:35:05,659 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) [2021-06-05 22:35:05,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 5226 transitions. [2021-06-05 22:35:05,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:35:05,661 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:05,661 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:05,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:05,861 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:35:05,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:05,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1406587304, now seen corresponding path program 20 times [2021-06-05 22:35:05,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:05,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861664878] [2021-06-05 22:35:05,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:05,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:06,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:06,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:06,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861664878] [2021-06-05 22:35:06,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861664878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:06,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680709466] [2021-06-05 22:35:06,001 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 [2021-06-05 22:35:06,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:35:06,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:06,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:35:06,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:06,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:06,165 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 [2021-06-05 22:35:06,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:06,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:06,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:06,175 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:35:06,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:06,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680709466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:06,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:06,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:35:06,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804815821] [2021-06-05 22:35:06,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:35:06,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:06,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:35:06,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:35:06,277 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) [2021-06-05 22:35:08,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:08,740 INFO L93 Difference]: Finished difference Result 2274 states and 7562 transitions. [2021-06-05 22:35:08,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 22:35:08,740 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 [2021-06-05 22:35:08,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:08,744 INFO L225 Difference]: With dead ends: 2274 [2021-06-05 22:35:08,744 INFO L226 Difference]: Without dead ends: 2243 [2021-06-05 22:35:08,744 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 1998.9ms TimeCoverageRelationStatistics Valid=590, Invalid=3570, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 22:35:08,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2243 states. [2021-06-05 22:35:08,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2243 to 1527. [2021-06-05 22:35:08,764 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) [2021-06-05 22:35:08,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 5266 transitions. [2021-06-05 22:35:08,767 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 5266 transitions. Word has length 24 [2021-06-05 22:35:08,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:08,767 INFO L482 AbstractCegarLoop]: Abstraction has 1527 states and 5266 transitions. [2021-06-05 22:35:08,767 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) [2021-06-05 22:35:08,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 5266 transitions. [2021-06-05 22:35:08,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:35:08,769 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:08,769 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:08,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:08,970 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:35:08,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:08,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1202635870, now seen corresponding path program 21 times [2021-06-05 22:35:08,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:08,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488328859] [2021-06-05 22:35:08,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:08,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:09,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:09,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:09,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488328859] [2021-06-05 22:35:09,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488328859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:09,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119069145] [2021-06-05 22:35:09,129 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 [2021-06-05 22:35:09,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:35:09,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:09,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:35:09,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:09,272 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 [2021-06-05 22:35:09,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:09,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:09,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:09,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:35:09,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:09,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119069145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:09,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:09,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:35:09,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603943192] [2021-06-05 22:35:09,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:35:09,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:09,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:35:09,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:35:09,316 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) [2021-06-05 22:35:10,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:10,818 INFO L93 Difference]: Finished difference Result 2109 states and 7137 transitions. [2021-06-05 22:35:10,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 22:35:10,818 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 [2021-06-05 22:35:10,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:10,821 INFO L225 Difference]: With dead ends: 2109 [2021-06-05 22:35:10,821 INFO L226 Difference]: Without dead ends: 2092 [2021-06-05 22:35:10,822 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1220.9ms TimeCoverageRelationStatistics Valid=359, Invalid=2091, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:35:10,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-06-05 22:35:10,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1518. [2021-06-05 22:35:10,838 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) [2021-06-05 22:35:10,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 5239 transitions. [2021-06-05 22:35:10,841 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 5239 transitions. Word has length 24 [2021-06-05 22:35:10,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:10,841 INFO L482 AbstractCegarLoop]: Abstraction has 1518 states and 5239 transitions. [2021-06-05 22:35:10,841 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) [2021-06-05 22:35:10,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 5239 transitions. [2021-06-05 22:35:10,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:35:10,843 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:10,843 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:11,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:11,044 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:35:11,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:11,044 INFO L82 PathProgramCache]: Analyzing trace with hash -743658084, now seen corresponding path program 66 times [2021-06-05 22:35:11,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:11,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362447011] [2021-06-05 22:35:11,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:11,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:11,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:11,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:11,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362447011] [2021-06-05 22:35:11,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362447011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:11,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547881226] [2021-06-05 22:35:11,206 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 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 [2021-06-05 22:35:11,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:35:11,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:11,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:35:11,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:11,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:11,363 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 [2021-06-05 22:35:11,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:11,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:11,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:11,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:35:11,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:11,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547881226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:11,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:11,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:35:11,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769335716] [2021-06-05 22:35:11,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:35:11,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:11,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:35:11,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:35:11,472 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) [2021-06-05 22:35:14,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:14,273 INFO L93 Difference]: Finished difference Result 2778 states and 9114 transitions. [2021-06-05 22:35:14,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 22:35:14,274 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 [2021-06-05 22:35:14,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:14,278 INFO L225 Difference]: With dead ends: 2778 [2021-06-05 22:35:14,279 INFO L226 Difference]: Without dead ends: 2741 [2021-06-05 22:35:14,279 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2494 ImplicationChecksByTransitivity, 2293.3ms TimeCoverageRelationStatistics Valid=924, Invalid=6048, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 22:35:14,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2741 states. [2021-06-05 22:35:14,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2741 to 1535. [2021-06-05 22:35:14,302 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) [2021-06-05 22:35:14,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 5310 transitions. [2021-06-05 22:35:14,304 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 5310 transitions. Word has length 24 [2021-06-05 22:35:14,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:14,305 INFO L482 AbstractCegarLoop]: Abstraction has 1535 states and 5310 transitions. [2021-06-05 22:35:14,305 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) [2021-06-05 22:35:14,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 5310 transitions. [2021-06-05 22:35:14,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:35:14,306 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:14,306 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:14,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:14,508 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:35:14,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:14,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1760448038, now seen corresponding path program 67 times [2021-06-05 22:35:14,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:14,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687998493] [2021-06-05 22:35:14,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:14,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:14,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:14,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:14,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687998493] [2021-06-05 22:35:14,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687998493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:14,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882306119] [2021-06-05 22:35:14,695 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 [2021-06-05 22:35:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:14,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:35:14,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:14,832 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 [2021-06-05 22:35:14,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:14,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:14,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:14,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:35:14,881 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:14,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882306119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:14,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:14,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:35:14,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744019499] [2021-06-05 22:35:14,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:35:14,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:14,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:35:14,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:35:14,882 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) [2021-06-05 22:35:17,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:17,219 INFO L93 Difference]: Finished difference Result 2830 states and 9291 transitions. [2021-06-05 22:35:17,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 22:35:17,219 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 [2021-06-05 22:35:17,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:17,223 INFO L225 Difference]: With dead ends: 2830 [2021-06-05 22:35:17,223 INFO L226 Difference]: Without dead ends: 2787 [2021-06-05 22:35:17,224 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 2000.8ms TimeCoverageRelationStatistics Valid=868, Invalid=5294, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 22:35:17,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2021-06-05 22:35:17,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 1554. [2021-06-05 22:35:17,247 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) [2021-06-05 22:35:17,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 5396 transitions. [2021-06-05 22:35:17,250 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 5396 transitions. Word has length 24 [2021-06-05 22:35:17,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:17,250 INFO L482 AbstractCegarLoop]: Abstraction has 1554 states and 5396 transitions. [2021-06-05 22:35:17,250 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) [2021-06-05 22:35:17,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 5396 transitions. [2021-06-05 22:35:17,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:35:17,252 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:17,252 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:17,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 22:35:17,453 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:35:17,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:17,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1493814354, now seen corresponding path program 22 times [2021-06-05 22:35:17,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:17,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882507560] [2021-06-05 22:35:17,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:17,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:17,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:17,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:17,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882507560] [2021-06-05 22:35:17,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882507560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:17,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308653985] [2021-06-05 22:35:17,594 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 [2021-06-05 22:35:17,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:35:17,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:17,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:35:17,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:17,730 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 [2021-06-05 22:35:17,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:17,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:17,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:17,734 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:35:17,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:17,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308653985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:17,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:17,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:35:17,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527980364] [2021-06-05 22:35:17,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:35:17,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:17,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:35:17,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:35:17,779 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) [2021-06-05 22:35:20,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:20,125 INFO L93 Difference]: Finished difference Result 2881 states and 9430 transitions. [2021-06-05 22:35:20,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 22:35:20,125 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 [2021-06-05 22:35:20,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:20,129 INFO L225 Difference]: With dead ends: 2881 [2021-06-05 22:35:20,129 INFO L226 Difference]: Without dead ends: 2832 [2021-06-05 22:35:20,129 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2147 ImplicationChecksByTransitivity, 1950.2ms TimeCoverageRelationStatistics Valid=911, Invalid=5095, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 22:35:20,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-06-05 22:35:20,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 1582. [2021-06-05 22:35:20,152 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) [2021-06-05 22:35:20,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 5522 transitions. [2021-06-05 22:35:20,154 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 5522 transitions. Word has length 24 [2021-06-05 22:35:20,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:20,154 INFO L482 AbstractCegarLoop]: Abstraction has 1582 states and 5522 transitions. [2021-06-05 22:35:20,154 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) [2021-06-05 22:35:20,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 5522 transitions. [2021-06-05 22:35:20,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:35:20,156 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:20,156 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:20,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-05 22:35:20,369 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:35:20,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:20,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1817400532, now seen corresponding path program 23 times [2021-06-05 22:35:20,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:20,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680033124] [2021-06-05 22:35:20,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:20,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:20,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:20,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:20,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680033124] [2021-06-05 22:35:20,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680033124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:20,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815625576] [2021-06-05 22:35:20,525 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 [2021-06-05 22:35:20,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:35:20,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:20,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:35:20,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:20,664 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 [2021-06-05 22:35:20,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:20,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:20,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:20,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:35:20,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:20,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815625576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:20,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:20,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:35:20,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120080161] [2021-06-05 22:35:20,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:35:20,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:20,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:35:20,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:35:20,715 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) [2021-06-05 22:35:23,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:23,118 INFO L93 Difference]: Finished difference Result 2726 states and 9045 transitions. [2021-06-05 22:35:23,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 22:35:23,125 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 [2021-06-05 22:35:23,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:23,129 INFO L225 Difference]: With dead ends: 2726 [2021-06-05 22:35:23,129 INFO L226 Difference]: Without dead ends: 2706 [2021-06-05 22:35:23,130 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1946 ImplicationChecksByTransitivity, 1912.2ms TimeCoverageRelationStatistics Valid=828, Invalid=4722, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 22:35:23,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2706 states. [2021-06-05 22:35:23,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2706 to 1576. [2021-06-05 22:35:23,154 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) [2021-06-05 22:35:23,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 5502 transitions. [2021-06-05 22:35:23,157 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 5502 transitions. Word has length 24 [2021-06-05 22:35:23,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:23,157 INFO L482 AbstractCegarLoop]: Abstraction has 1576 states and 5502 transitions. [2021-06-05 22:35:23,157 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) [2021-06-05 22:35:23,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 5502 transitions. [2021-06-05 22:35:23,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:35:23,159 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:23,159 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:23,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:23,369 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:35:23,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:23,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1940644096, now seen corresponding path program 68 times [2021-06-05 22:35:23,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:23,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355621568] [2021-06-05 22:35:23,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:23,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:23,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:23,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:23,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355621568] [2021-06-05 22:35:23,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355621568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:23,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489917344] [2021-06-05 22:35:23,516 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 [2021-06-05 22:35:23,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:35:23,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:23,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:35:23,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:23,687 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:23,687 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 [2021-06-05 22:35:23,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:23,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:23,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:23,697 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 22:35:23,763 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:23,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489917344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:23,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:23,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:35:23,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447835629] [2021-06-05 22:35:23,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:35:23,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:23,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:35:23,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:35:23,764 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) [2021-06-05 22:35:26,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:26,890 INFO L93 Difference]: Finished difference Result 2803 states and 9390 transitions. [2021-06-05 22:35:26,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 22:35:26,895 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 [2021-06-05 22:35:26,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:26,899 INFO L225 Difference]: With dead ends: 2803 [2021-06-05 22:35:26,899 INFO L226 Difference]: Without dead ends: 2781 [2021-06-05 22:35:26,900 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 2705.5ms TimeCoverageRelationStatistics Valid=988, Invalid=6322, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 22:35:26,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2781 states. [2021-06-05 22:35:26,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2781 to 1592. [2021-06-05 22:35:26,927 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) [2021-06-05 22:35:26,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 5582 transitions. [2021-06-05 22:35:26,930 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 5582 transitions. Word has length 24 [2021-06-05 22:35:26,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:26,930 INFO L482 AbstractCegarLoop]: Abstraction has 1592 states and 5582 transitions. [2021-06-05 22:35:26,930 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) [2021-06-05 22:35:26,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 5582 transitions. [2021-06-05 22:35:26,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:35:26,932 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:26,932 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:27,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:27,135 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:35:27,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:27,135 INFO L82 PathProgramCache]: Analyzing trace with hash -2145562230, now seen corresponding path program 24 times [2021-06-05 22:35:27,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:27,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010491783] [2021-06-05 22:35:27,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:27,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:27,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:27,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:27,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010491783] [2021-06-05 22:35:27,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010491783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:27,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629438195] [2021-06-05 22:35:27,293 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 [2021-06-05 22:35:27,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:35:27,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:27,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:35:27,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:27,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:27,471 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 [2021-06-05 22:35:27,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:27,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:27,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:27,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:27 [2021-06-05 22:35:27,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:27,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629438195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:27,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:27,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:35:27,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250510198] [2021-06-05 22:35:27,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:35:27,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:27,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:35:27,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:35:27,556 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) [2021-06-05 22:35:30,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:30,571 INFO L93 Difference]: Finished difference Result 2820 states and 9359 transitions. [2021-06-05 22:35:30,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 22:35:30,571 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 [2021-06-05 22:35:30,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:30,575 INFO L225 Difference]: With dead ends: 2820 [2021-06-05 22:35:30,575 INFO L226 Difference]: Without dead ends: 2800 [2021-06-05 22:35:30,576 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2682 ImplicationChecksByTransitivity, 2656.0ms TimeCoverageRelationStatistics Valid=1088, Invalid=6222, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 22:35:30,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2800 states. [2021-06-05 22:35:30,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2800 to 1593. [2021-06-05 22:35:30,601 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) [2021-06-05 22:35:30,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 5583 transitions. [2021-06-05 22:35:30,604 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 5583 transitions. Word has length 24 [2021-06-05 22:35:30,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:30,604 INFO L482 AbstractCegarLoop]: Abstraction has 1593 states and 5583 transitions. [2021-06-05 22:35:30,604 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) [2021-06-05 22:35:30,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 5583 transitions. [2021-06-05 22:35:30,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:35:30,606 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:30,606 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:30,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-05 22:35:30,808 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:35:30,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:30,808 INFO L82 PathProgramCache]: Analyzing trace with hash -459818108, now seen corresponding path program 25 times [2021-06-05 22:35:30,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:30,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496151799] [2021-06-05 22:35:30,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:30,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:30,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:30,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:30,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496151799] [2021-06-05 22:35:30,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496151799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:30,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509869309] [2021-06-05 22:35:30,949 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 [2021-06-05 22:35:30,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:30,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:35:30,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:31,093 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 [2021-06-05 22:35:31,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:31,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:31,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:31,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:35:31,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:31,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509869309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:31,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:31,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:35:31,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416586349] [2021-06-05 22:35:31,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:35:31,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:31,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:35:31,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:35:31,124 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) [2021-06-05 22:35:33,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:33,338 INFO L93 Difference]: Finished difference Result 2662 states and 8908 transitions. [2021-06-05 22:35:33,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 22:35:33,338 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 [2021-06-05 22:35:33,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:33,343 INFO L225 Difference]: With dead ends: 2662 [2021-06-05 22:35:33,343 INFO L226 Difference]: Without dead ends: 2629 [2021-06-05 22:35:33,343 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 1728.7ms TimeCoverageRelationStatistics Valid=738, Invalid=4092, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 22:35:33,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2629 states. [2021-06-05 22:35:33,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2629 to 1589. [2021-06-05 22:35:33,367 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) [2021-06-05 22:35:33,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1589 states to 1589 states and 5562 transitions. [2021-06-05 22:35:33,370 INFO L78 Accepts]: Start accepts. Automaton has 1589 states and 5562 transitions. Word has length 24 [2021-06-05 22:35:33,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:33,371 INFO L482 AbstractCegarLoop]: Abstraction has 1589 states and 5562 transitions. [2021-06-05 22:35:33,371 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) [2021-06-05 22:35:33,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1589 states and 5562 transitions. [2021-06-05 22:35:33,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:35:33,373 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:33,373 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:33,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:33,574 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:35:33,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:33,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1985018250, now seen corresponding path program 26 times [2021-06-05 22:35:33,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:33,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597504857] [2021-06-05 22:35:33,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:33,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:33,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:33,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:33,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597504857] [2021-06-05 22:35:33,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597504857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:33,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745716697] [2021-06-05 22:35:33,735 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 [2021-06-05 22:35:33,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:35:33,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:33,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:35:33,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:34,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:35:34,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:35:34,004 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 [2021-06-05 22:35:34,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:34,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:34,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:34,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 22:35:34,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:34,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745716697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:34,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:34,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:35:34,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420801731] [2021-06-05 22:35:34,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:35:34,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:34,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:35:34,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:35:34,040 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) [2021-06-05 22:35:36,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:36,581 INFO L93 Difference]: Finished difference Result 3367 states and 11408 transitions. [2021-06-05 22:35:36,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 22:35:36,582 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 [2021-06-05 22:35:36,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:36,588 INFO L225 Difference]: With dead ends: 3367 [2021-06-05 22:35:36,588 INFO L226 Difference]: Without dead ends: 3341 [2021-06-05 22:35:36,588 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1266 ImplicationChecksByTransitivity, 2015.6ms TimeCoverageRelationStatistics Valid=538, Invalid=4018, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 22:35:36,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3341 states. [2021-06-05 22:35:36,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3341 to 1591. [2021-06-05 22:35:36,622 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) [2021-06-05 22:35:36,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 5568 transitions. [2021-06-05 22:35:36,625 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 5568 transitions. Word has length 24 [2021-06-05 22:35:36,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:36,626 INFO L482 AbstractCegarLoop]: Abstraction has 1591 states and 5568 transitions. [2021-06-05 22:35:36,626 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) [2021-06-05 22:35:36,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 5568 transitions. [2021-06-05 22:35:36,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:35:36,628 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:36,628 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:36,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:36,841 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:35:36,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:36,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1800433182, now seen corresponding path program 27 times [2021-06-05 22:35:36,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:36,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632463531] [2021-06-05 22:35:36,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:36,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:37,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:37,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:37,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632463531] [2021-06-05 22:35:37,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632463531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:37,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12055512] [2021-06-05 22:35:37,035 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 [2021-06-05 22:35:37,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:35:37,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:37,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:35:37,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:37,247 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:37,247 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 [2021-06-05 22:35:37,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:37,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:37,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:37,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 22:35:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:37,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12055512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:37,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:37,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:35:37,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12798917] [2021-06-05 22:35:37,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:35:37,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:37,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:35:37,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:35:37,321 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) [2021-06-05 22:35:40,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:40,181 INFO L93 Difference]: Finished difference Result 2710 states and 9124 transitions. [2021-06-05 22:35:40,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 22:35:40,182 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 [2021-06-05 22:35:40,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:40,186 INFO L225 Difference]: With dead ends: 2710 [2021-06-05 22:35:40,186 INFO L226 Difference]: Without dead ends: 2683 [2021-06-05 22:35:40,186 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 2365.1ms TimeCoverageRelationStatistics Valid=744, Invalid=4368, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 22:35:40,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2683 states. [2021-06-05 22:35:40,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2683 to 1600. [2021-06-05 22:35:40,209 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) [2021-06-05 22:35:40,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 5601 transitions. [2021-06-05 22:35:40,212 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 5601 transitions. Word has length 24 [2021-06-05 22:35:40,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:40,212 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 5601 transitions. [2021-06-05 22:35:40,212 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) [2021-06-05 22:35:40,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 5601 transitions. [2021-06-05 22:35:40,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:35:40,214 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:40,214 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:40,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 22:35:40,415 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:35:40,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:40,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1590895802, now seen corresponding path program 28 times [2021-06-05 22:35:40,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:40,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228599860] [2021-06-05 22:35:40,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:40,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:40,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:40,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:40,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228599860] [2021-06-05 22:35:40,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228599860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:40,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240116370] [2021-06-05 22:35:40,613 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 [2021-06-05 22:35:40,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:35:40,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:40,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:35:40,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:40,787 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 [2021-06-05 22:35:40,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:40,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:40,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:40,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:35:40,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:40,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240116370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:40,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:40,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:35:40,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727976335] [2021-06-05 22:35:40,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:35:40,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:40,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:35:40,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:35:40,817 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) [2021-06-05 22:35:42,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:42,609 INFO L93 Difference]: Finished difference Result 2564 states and 8676 transitions. [2021-06-05 22:35:42,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:35:42,609 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 [2021-06-05 22:35:42,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:42,613 INFO L225 Difference]: With dead ends: 2564 [2021-06-05 22:35:42,613 INFO L226 Difference]: Without dead ends: 2535 [2021-06-05 22:35:42,614 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1413.3ms TimeCoverageRelationStatistics Valid=402, Invalid=2460, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 22:35:42,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2535 states. [2021-06-05 22:35:42,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2535 to 1605. [2021-06-05 22:35:42,637 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) [2021-06-05 22:35:42,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 5617 transitions. [2021-06-05 22:35:42,640 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 5617 transitions. Word has length 24 [2021-06-05 22:35:42,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:42,641 INFO L482 AbstractCegarLoop]: Abstraction has 1605 states and 5617 transitions. [2021-06-05 22:35:42,641 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) [2021-06-05 22:35:42,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 5617 transitions. [2021-06-05 22:35:42,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:35:42,643 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:42,643 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:42,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 22:35:42,845 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:35:42,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:42,845 INFO L82 PathProgramCache]: Analyzing trace with hash -975399748, now seen corresponding path program 29 times [2021-06-05 22:35:42,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:42,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142474900] [2021-06-05 22:35:42,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:42,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:43,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:43,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:43,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142474900] [2021-06-05 22:35:43,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142474900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:43,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332841932] [2021-06-05 22:35:43,033 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 [2021-06-05 22:35:43,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:35:43,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:43,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:35:43,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:43,224 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 20 treesize of output 12 [2021-06-05 22:35:43,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:43,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:43,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:43,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:35:43,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:43,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332841932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:43,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:43,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:35:43,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795933767] [2021-06-05 22:35:43,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:35:43,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:43,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:35:43,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:35:43,261 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) [2021-06-05 22:35:44,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:44,951 INFO L93 Difference]: Finished difference Result 2491 states and 8452 transitions. [2021-06-05 22:35:44,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:35:44,951 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 [2021-06-05 22:35:44,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:44,955 INFO L225 Difference]: With dead ends: 2491 [2021-06-05 22:35:44,955 INFO L226 Difference]: Without dead ends: 2462 [2021-06-05 22:35:44,956 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1397.4ms TimeCoverageRelationStatistics Valid=402, Invalid=2354, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 22:35:44,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2021-06-05 22:35:44,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 1598. [2021-06-05 22:35:44,975 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) [2021-06-05 22:35:44,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 5597 transitions. [2021-06-05 22:35:44,977 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 5597 transitions. Word has length 24 [2021-06-05 22:35:44,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:44,977 INFO L482 AbstractCegarLoop]: Abstraction has 1598 states and 5597 transitions. [2021-06-05 22:35:44,977 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) [2021-06-05 22:35:44,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 5597 transitions. [2021-06-05 22:35:44,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:35:44,979 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:44,979 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:45,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:45,180 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:35:45,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:45,180 INFO L82 PathProgramCache]: Analyzing trace with hash -2003549608, now seen corresponding path program 30 times [2021-06-05 22:35:45,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:45,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778271688] [2021-06-05 22:35:45,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:45,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:45,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778271688] [2021-06-05 22:35:45,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778271688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:45,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194773326] [2021-06-05 22:35:45,337 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 [2021-06-05 22:35:45,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:35:45,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:45,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:35:45,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:45,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:35:45,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:35:45,531 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:45,531 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 [2021-06-05 22:35:45,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:45,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:45,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:45,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:36 [2021-06-05 22:35:45,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:45,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194773326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:45,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:45,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 22:35:45,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523148081] [2021-06-05 22:35:45,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:35:45,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:45,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:35:45,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:35:45,643 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) [2021-06-05 22:35:47,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:47,428 INFO L93 Difference]: Finished difference Result 2374 states and 8085 transitions. [2021-06-05 22:35:47,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 22:35:47,428 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 [2021-06-05 22:35:47,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:47,432 INFO L225 Difference]: With dead ends: 2374 [2021-06-05 22:35:47,432 INFO L226 Difference]: Without dead ends: 2357 [2021-06-05 22:35:47,432 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 1512.6ms TimeCoverageRelationStatistics Valid=625, Invalid=3035, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 22:35:47,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2021-06-05 22:35:47,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 1611. [2021-06-05 22:35:47,453 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) [2021-06-05 22:35:47,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 5637 transitions. [2021-06-05 22:35:47,456 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 5637 transitions. Word has length 24 [2021-06-05 22:35:47,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:47,456 INFO L482 AbstractCegarLoop]: Abstraction has 1611 states and 5637 transitions. [2021-06-05 22:35:47,456 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) [2021-06-05 22:35:47,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 5637 transitions. [2021-06-05 22:35:47,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:35:47,458 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:47,458 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:47,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-05 22:35:47,659 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:35:47,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:47,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1679963430, now seen corresponding path program 31 times [2021-06-05 22:35:47,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:47,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351166481] [2021-06-05 22:35:47,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:47,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:47,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:47,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351166481] [2021-06-05 22:35:47,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351166481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:47,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672284432] [2021-06-05 22:35:47,865 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 [2021-06-05 22:35:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:47,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:35:47,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:48,029 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 [2021-06-05 22:35:48,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:48,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:48,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:48,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:35:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:48,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672284432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:48,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:48,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:35:48,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054164161] [2021-06-05 22:35:48,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:35:48,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:48,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:35:48,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:35:48,080 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) [2021-06-05 22:35:49,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:49,223 INFO L93 Difference]: Finished difference Result 2307 states and 7914 transitions. [2021-06-05 22:35:49,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:35:49,223 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 [2021-06-05 22:35:49,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:49,227 INFO L225 Difference]: With dead ends: 2307 [2021-06-05 22:35:49,227 INFO L226 Difference]: Without dead ends: 2296 [2021-06-05 22:35:49,228 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 950.6ms TimeCoverageRelationStatistics Valid=262, Invalid=1460, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:35:49,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-06-05 22:35:49,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1596. [2021-06-05 22:35:49,249 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) [2021-06-05 22:35:49,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 5589 transitions. [2021-06-05 22:35:49,252 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 5589 transitions. Word has length 24 [2021-06-05 22:35:49,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:49,252 INFO L482 AbstractCegarLoop]: Abstraction has 1596 states and 5589 transitions. [2021-06-05 22:35:49,252 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) [2021-06-05 22:35:49,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 5589 transitions. [2021-06-05 22:35:49,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:35:49,254 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:49,254 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:49,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:49,455 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:35:49,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:49,455 INFO L82 PathProgramCache]: Analyzing trace with hash 772236998, now seen corresponding path program 32 times [2021-06-05 22:35:49,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:49,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518032639] [2021-06-05 22:35:49,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:49,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:49,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:49,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:49,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518032639] [2021-06-05 22:35:49,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518032639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:49,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138613276] [2021-06-05 22:35:49,633 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 [2021-06-05 22:35:49,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:35:49,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:49,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:35:49,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:49,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:35:49,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:35:49,917 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 [2021-06-05 22:35:49,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:49,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:49,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:49,923 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 22:35:49,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:49,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138613276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:49,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:49,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:35:49,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457022547] [2021-06-05 22:35:49,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:35:49,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:49,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:35:49,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:35:49,952 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) [2021-06-05 22:35:52,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:52,709 INFO L93 Difference]: Finished difference Result 3315 states and 11270 transitions. [2021-06-05 22:35:52,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 22:35:52,710 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 [2021-06-05 22:35:52,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:52,715 INFO L225 Difference]: With dead ends: 3315 [2021-06-05 22:35:52,715 INFO L226 Difference]: Without dead ends: 3296 [2021-06-05 22:35:52,715 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1290 ImplicationChecksByTransitivity, 2270.0ms TimeCoverageRelationStatistics Valid=585, Invalid=4107, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 22:35:52,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3296 states. [2021-06-05 22:35:52,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3296 to 1596. [2021-06-05 22:35:52,739 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) [2021-06-05 22:35:52,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 5589 transitions. [2021-06-05 22:35:52,742 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 5589 transitions. Word has length 24 [2021-06-05 22:35:52,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:52,742 INFO L482 AbstractCegarLoop]: Abstraction has 1596 states and 5589 transitions. [2021-06-05 22:35:52,742 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) [2021-06-05 22:35:52,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 5589 transitions. [2021-06-05 22:35:52,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:35:52,744 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:52,744 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:52,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:52,944 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:35:52,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:52,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1068711792, now seen corresponding path program 33 times [2021-06-05 22:35:52,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:52,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854336941] [2021-06-05 22:35:52,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:52,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:53,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:53,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854336941] [2021-06-05 22:35:53,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854336941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:53,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480067923] [2021-06-05 22:35:53,124 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 [2021-06-05 22:35:53,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:35:53,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:53,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:35:53,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:53,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:53,310 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 [2021-06-05 22:35:53,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:53,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:53,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:53,320 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 22:35:53,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:53,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480067923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:53,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:53,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:35:53,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196271870] [2021-06-05 22:35:53,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:35:53,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:53,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:35:53,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:35:53,401 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) [2021-06-05 22:35:56,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:56,431 INFO L93 Difference]: Finished difference Result 2689 states and 9043 transitions. [2021-06-05 22:35:56,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 22:35:56,431 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 [2021-06-05 22:35:56,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:56,436 INFO L225 Difference]: With dead ends: 2689 [2021-06-05 22:35:56,436 INFO L226 Difference]: Without dead ends: 2662 [2021-06-05 22:35:56,436 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 2407.6ms TimeCoverageRelationStatistics Valid=686, Invalid=4284, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 22:35:56,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2662 states. [2021-06-05 22:35:56,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2662 to 1601. [2021-06-05 22:35:56,458 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) [2021-06-05 22:35:56,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 5605 transitions. [2021-06-05 22:35:56,461 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 5605 transitions. Word has length 24 [2021-06-05 22:35:56,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:56,461 INFO L482 AbstractCegarLoop]: Abstraction has 1601 states and 5605 transitions. [2021-06-05 22:35:56,461 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) [2021-06-05 22:35:56,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 5605 transitions. [2021-06-05 22:35:56,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:35:56,463 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:56,463 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:56,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-05 22:35:56,664 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:35:56,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:56,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1073663896, now seen corresponding path program 34 times [2021-06-05 22:35:56,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:56,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169674182] [2021-06-05 22:35:56,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:56,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:56,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:56,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:56,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169674182] [2021-06-05 22:35:56,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169674182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:56,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050930207] [2021-06-05 22:35:56,866 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 [2021-06-05 22:35:56,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:35:56,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:56,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:35:56,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:57,043 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 [2021-06-05 22:35:57,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:57,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:57,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:57,046 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:35:57,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:57,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050930207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:57,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:57,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:35:57,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755432685] [2021-06-05 22:35:57,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:35:57,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:57,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:35:57,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:35:57,074 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) [2021-06-05 22:35:58,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:58,873 INFO L93 Difference]: Finished difference Result 2578 states and 8710 transitions. [2021-06-05 22:35:58,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:35:58,874 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 [2021-06-05 22:35:58,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:58,878 INFO L225 Difference]: With dead ends: 2578 [2021-06-05 22:35:58,878 INFO L226 Difference]: Without dead ends: 2558 [2021-06-05 22:35:58,878 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 1334.7ms TimeCoverageRelationStatistics Valid=368, Invalid=2284, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 22:35:58,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2558 states. [2021-06-05 22:35:58,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2558 to 1604. [2021-06-05 22:35:58,897 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) [2021-06-05 22:35:58,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 5613 transitions. [2021-06-05 22:35:58,900 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 5613 transitions. Word has length 24 [2021-06-05 22:35:58,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:58,900 INFO L482 AbstractCegarLoop]: Abstraction has 1604 states and 5613 transitions. [2021-06-05 22:35:58,900 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) [2021-06-05 22:35:58,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 5613 transitions. [2021-06-05 22:35:58,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:35:58,902 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:58,902 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:59,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 22:35:59,102 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:35:59,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:59,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1285059888, now seen corresponding path program 35 times [2021-06-05 22:35:59,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:59,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648399663] [2021-06-05 22:35:59,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:59,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:59,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648399663] [2021-06-05 22:35:59,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648399663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:59,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852878520] [2021-06-05 22:35:59,298 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 [2021-06-05 22:35:59,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:35:59,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:59,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:35:59,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:59,460 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 20 treesize of output 12 [2021-06-05 22:35:59,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:59,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:59,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:59,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:35:59,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:59,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852878520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:59,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:59,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:35:59,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673030375] [2021-06-05 22:35:59,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:35:59,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:59,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:35:59,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:35:59,490 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) [2021-06-05 22:36:01,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:01,024 INFO L93 Difference]: Finished difference Result 2511 states and 8501 transitions. [2021-06-05 22:36:01,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:36:01,024 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 [2021-06-05 22:36:01,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:01,028 INFO L225 Difference]: With dead ends: 2511 [2021-06-05 22:36:01,028 INFO L226 Difference]: Without dead ends: 2491 [2021-06-05 22:36:01,029 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1250.7ms TimeCoverageRelationStatistics Valid=363, Invalid=2187, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:36:01,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2021-06-05 22:36:01,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 1600. [2021-06-05 22:36:01,049 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) [2021-06-05 22:36:01,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 5605 transitions. [2021-06-05 22:36:01,052 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 5605 transitions. Word has length 24 [2021-06-05 22:36:01,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:01,052 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 5605 transitions. [2021-06-05 22:36:01,052 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) [2021-06-05 22:36:01,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 5605 transitions. [2021-06-05 22:36:01,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:36:01,054 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:01,054 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:01,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:01,254 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:36:01,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:01,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1461601320, now seen corresponding path program 36 times [2021-06-05 22:36:01,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:01,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489499342] [2021-06-05 22:36:01,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:01,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:01,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:01,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:01,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489499342] [2021-06-05 22:36:01,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489499342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:01,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43227506] [2021-06-05 22:36:01,422 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 [2021-06-05 22:36:01,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:36:01,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:01,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:01,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:01,559 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 [2021-06-05 22:36:01,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:01,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:01,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:01,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:36:01,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:01,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43227506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:01,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:01,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:36:01,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682996865] [2021-06-05 22:36:01,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:36:01,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:01,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:36:01,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:36:01,608 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) [2021-06-05 22:36:03,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:03,065 INFO L93 Difference]: Finished difference Result 2345 states and 8015 transitions. [2021-06-05 22:36:03,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:36:03,066 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 [2021-06-05 22:36:03,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:03,069 INFO L225 Difference]: With dead ends: 2345 [2021-06-05 22:36:03,069 INFO L226 Difference]: Without dead ends: 2336 [2021-06-05 22:36:03,070 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1253.2ms TimeCoverageRelationStatistics Valid=386, Invalid=2266, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 22:36:03,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-06-05 22:36:03,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 1608. [2021-06-05 22:36:03,089 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) [2021-06-05 22:36:03,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 5625 transitions. [2021-06-05 22:36:03,092 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 5625 transitions. Word has length 24 [2021-06-05 22:36:03,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:03,092 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 5625 transitions. [2021-06-05 22:36:03,092 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) [2021-06-05 22:36:03,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 5625 transitions. [2021-06-05 22:36:03,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:36:03,094 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:03,094 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:03,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-06-05 22:36:03,296 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:36:03,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:03,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1999627536, now seen corresponding path program 37 times [2021-06-05 22:36:03,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:03,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877296963] [2021-06-05 22:36:03,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:03,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:03,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:03,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:03,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877296963] [2021-06-05 22:36:03,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877296963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:03,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120185608] [2021-06-05 22:36:03,460 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 [2021-06-05 22:36:03,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:03,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:03,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:03,601 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 [2021-06-05 22:36:03,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:03,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:03,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:03,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:36:03,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:03,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120185608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:03,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:03,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:36:03,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108864389] [2021-06-05 22:36:03,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:36:03,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:03,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:36:03,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:36:03,649 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) [2021-06-05 22:36:05,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:05,036 INFO L93 Difference]: Finished difference Result 2356 states and 8045 transitions. [2021-06-05 22:36:05,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:36:05,036 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 [2021-06-05 22:36:05,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:05,039 INFO L225 Difference]: With dead ends: 2356 [2021-06-05 22:36:05,040 INFO L226 Difference]: Without dead ends: 2346 [2021-06-05 22:36:05,040 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1089.1ms TimeCoverageRelationStatistics Valid=303, Invalid=1767, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:36:05,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-06-05 22:36:05,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1603. [2021-06-05 22:36:05,060 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) [2021-06-05 22:36:05,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 5613 transitions. [2021-06-05 22:36:05,063 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 5613 transitions. Word has length 24 [2021-06-05 22:36:05,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:05,063 INFO L482 AbstractCegarLoop]: Abstraction has 1603 states and 5613 transitions. [2021-06-05 22:36:05,063 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) [2021-06-05 22:36:05,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 5613 transitions. [2021-06-05 22:36:05,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:36:05,065 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:05,065 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:05,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-05 22:36:05,265 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:36:05,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:05,265 INFO L82 PathProgramCache]: Analyzing trace with hash 2121589456, now seen corresponding path program 38 times [2021-06-05 22:36:05,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:05,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058377455] [2021-06-05 22:36:05,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:05,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:05,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:05,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:05,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058377455] [2021-06-05 22:36:05,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058377455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:05,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298925153] [2021-06-05 22:36:05,447 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 [2021-06-05 22:36:05,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:36:05,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:05,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:36:05,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:05,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:05,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:36:05,690 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 [2021-06-05 22:36:05,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:05,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:05,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:05,695 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 22:36:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:05,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298925153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:05,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:05,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:36:05,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527514132] [2021-06-05 22:36:05,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:36:05,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:05,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:36:05,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:36:05,725 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) [2021-06-05 22:36:06,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:06,822 INFO L93 Difference]: Finished difference Result 2139 states and 7300 transitions. [2021-06-05 22:36:06,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:36:06,823 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 [2021-06-05 22:36:06,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:06,826 INFO L225 Difference]: With dead ends: 2139 [2021-06-05 22:36:06,826 INFO L226 Difference]: Without dead ends: 2130 [2021-06-05 22:36:06,826 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 909.5ms TimeCoverageRelationStatistics Valid=253, Invalid=1553, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:36:06,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2021-06-05 22:36:06,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 1605. [2021-06-05 22:36:06,844 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) [2021-06-05 22:36:06,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 5620 transitions. [2021-06-05 22:36:06,846 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 5620 transitions. Word has length 24 [2021-06-05 22:36:06,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:06,846 INFO L482 AbstractCegarLoop]: Abstraction has 1605 states and 5620 transitions. [2021-06-05 22:36:06,846 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) [2021-06-05 22:36:06,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 5620 transitions. [2021-06-05 22:36:06,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:36:06,848 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:06,848 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:07,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-05 22:36:07,049 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:36:07,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:07,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1912052076, now seen corresponding path program 39 times [2021-06-05 22:36:07,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:07,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970332123] [2021-06-05 22:36:07,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:07,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:07,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:07,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:07,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970332123] [2021-06-05 22:36:07,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970332123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:07,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369280428] [2021-06-05 22:36:07,234 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 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 [2021-06-05 22:36:07,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:36:07,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:07,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:07,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:07,404 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 [2021-06-05 22:36:07,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:07,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:07,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:07,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:36:07,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:07,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369280428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:07,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:07,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:36:07,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596392676] [2021-06-05 22:36:07,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:36:07,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:07,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:36:07,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:36:07,437 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) [2021-06-05 22:36:08,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:08,711 INFO L93 Difference]: Finished difference Result 2163 states and 7368 transitions. [2021-06-05 22:36:08,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:36:08,715 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 [2021-06-05 22:36:08,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:08,719 INFO L225 Difference]: With dead ends: 2163 [2021-06-05 22:36:08,719 INFO L226 Difference]: Without dead ends: 2144 [2021-06-05 22:36:08,719 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1007.8ms TimeCoverageRelationStatistics Valid=294, Invalid=1686, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:36:08,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2021-06-05 22:36:08,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 1610. [2021-06-05 22:36:08,746 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) [2021-06-05 22:36:08,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 5636 transitions. [2021-06-05 22:36:08,749 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 5636 transitions. Word has length 24 [2021-06-05 22:36:08,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:08,749 INFO L482 AbstractCegarLoop]: Abstraction has 1610 states and 5636 transitions. [2021-06-05 22:36:08,749 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) [2021-06-05 22:36:08,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 5636 transitions. [2021-06-05 22:36:08,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:36:08,751 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:08,751 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:08,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:08,951 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:36:08,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:08,952 INFO L82 PathProgramCache]: Analyzing trace with hash -654243474, now seen corresponding path program 40 times [2021-06-05 22:36:08,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:08,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778956582] [2021-06-05 22:36:08,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:08,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:09,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:09,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778956582] [2021-06-05 22:36:09,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778956582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:09,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927096742] [2021-06-05 22:36:09,158 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 [2021-06-05 22:36:09,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:36:09,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:09,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:09,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:09,317 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 [2021-06-05 22:36:09,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:09,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:09,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:09,319 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:36:09,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:09,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927096742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:09,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:09,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:36:09,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192478783] [2021-06-05 22:36:09,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:36:09,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:09,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:36:09,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:36:09,350 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) [2021-06-05 22:36:10,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:10,587 INFO L93 Difference]: Finished difference Result 2117 states and 7230 transitions. [2021-06-05 22:36:10,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:36:10,588 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 [2021-06-05 22:36:10,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:10,591 INFO L225 Difference]: With dead ends: 2117 [2021-06-05 22:36:10,591 INFO L226 Difference]: Without dead ends: 2098 [2021-06-05 22:36:10,591 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 981.7ms TimeCoverageRelationStatistics Valid=287, Invalid=1605, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:36:10,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2021-06-05 22:36:10,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1607. [2021-06-05 22:36:10,608 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) [2021-06-05 22:36:10,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 5628 transitions. [2021-06-05 22:36:10,611 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 5628 transitions. Word has length 24 [2021-06-05 22:36:10,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:10,611 INFO L482 AbstractCegarLoop]: Abstraction has 1607 states and 5628 transitions. [2021-06-05 22:36:10,611 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) [2021-06-05 22:36:10,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 5628 transitions. [2021-06-05 22:36:10,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:36:10,613 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:10,613 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:10,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:10,814 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:36:10,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:10,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1682393334, now seen corresponding path program 41 times [2021-06-05 22:36:10,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:10,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100884772] [2021-06-05 22:36:10,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:10,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:10,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:10,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:10,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100884772] [2021-06-05 22:36:10,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100884772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:10,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629561558] [2021-06-05 22:36:10,975 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 [2021-06-05 22:36:11,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:36:11,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:11,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:11,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:11,114 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 [2021-06-05 22:36:11,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:11,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:11,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:11,118 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:36:11,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:11,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629561558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:11,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:11,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:36:11,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777118672] [2021-06-05 22:36:11,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:36:11,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:11,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:36:11,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:36:11,161 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) [2021-06-05 22:36:12,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:12,109 INFO L93 Difference]: Finished difference Result 2083 states and 7122 transitions. [2021-06-05 22:36:12,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:36:12,109 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 [2021-06-05 22:36:12,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:12,112 INFO L225 Difference]: With dead ends: 2083 [2021-06-05 22:36:12,113 INFO L226 Difference]: Without dead ends: 2074 [2021-06-05 22:36:12,113 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 771.1ms TimeCoverageRelationStatistics Valid=252, Invalid=1230, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:36:12,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2021-06-05 22:36:12,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 1616. [2021-06-05 22:36:12,132 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) [2021-06-05 22:36:12,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 5656 transitions. [2021-06-05 22:36:12,135 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 5656 transitions. Word has length 24 [2021-06-05 22:36:12,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:12,135 INFO L482 AbstractCegarLoop]: Abstraction has 1616 states and 5656 transitions. [2021-06-05 22:36:12,135 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) [2021-06-05 22:36:12,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 5656 transitions. [2021-06-05 22:36:12,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:36:12,137 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:12,137 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:12,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2021-06-05 22:36:12,337 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:36:12,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:12,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1358807156, now seen corresponding path program 42 times [2021-06-05 22:36:12,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:12,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685084408] [2021-06-05 22:36:12,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:12,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:12,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:12,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685084408] [2021-06-05 22:36:12,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685084408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:12,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924034932] [2021-06-05 22:36:12,505 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 [2021-06-05 22:36:12,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:36:12,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:12,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:36:12,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:12,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:12,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:12,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:12,695 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:12,695 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 [2021-06-05 22:36:12,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:12,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:12,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:12,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:88 [2021-06-05 22:36:12,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:12,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924034932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:12,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:12,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 22:36:12,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115698728] [2021-06-05 22:36:12,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:36:12,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:12,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:36:12,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:36:12,827 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) [2021-06-05 22:36:14,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:14,222 INFO L93 Difference]: Finished difference Result 2092 states and 7134 transitions. [2021-06-05 22:36:14,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:36:14,223 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 [2021-06-05 22:36:14,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:14,226 INFO L225 Difference]: With dead ends: 2092 [2021-06-05 22:36:14,226 INFO L226 Difference]: Without dead ends: 2083 [2021-06-05 22:36:14,226 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1181.8ms TimeCoverageRelationStatistics Valid=419, Invalid=1933, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 22:36:14,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2021-06-05 22:36:14,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 1615. [2021-06-05 22:36:14,244 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) [2021-06-05 22:36:14,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 5653 transitions. [2021-06-05 22:36:14,247 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 5653 transitions. Word has length 24 [2021-06-05 22:36:14,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:14,247 INFO L482 AbstractCegarLoop]: Abstraction has 1615 states and 5653 transitions. [2021-06-05 22:36:14,247 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) [2021-06-05 22:36:14,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 5653 transitions. [2021-06-05 22:36:14,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:36:14,249 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:14,249 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:14,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 22:36:14,450 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:36:14,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:14,450 INFO L82 PathProgramCache]: Analyzing trace with hash 326936966, now seen corresponding path program 43 times [2021-06-05 22:36:14,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:14,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344410333] [2021-06-05 22:36:14,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:14,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:14,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:14,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344410333] [2021-06-05 22:36:14,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344410333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:14,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075868599] [2021-06-05 22:36:14,600 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 [2021-06-05 22:36:14,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:14,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:14,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:14,755 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 [2021-06-05 22:36:14,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:14,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:14,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:14,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:36:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:14,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075868599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:14,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:14,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:36:14,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396700023] [2021-06-05 22:36:14,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:36:14,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:14,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:36:14,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:36:14,798 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) [2021-06-05 22:36:15,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:15,723 INFO L93 Difference]: Finished difference Result 2032 states and 6957 transitions. [2021-06-05 22:36:15,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:36:15,723 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 [2021-06-05 22:36:15,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:15,726 INFO L225 Difference]: With dead ends: 2032 [2021-06-05 22:36:15,726 INFO L226 Difference]: Without dead ends: 2021 [2021-06-05 22:36:15,726 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 774.3ms TimeCoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:36:15,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2021-06-05 22:36:15,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 1605. [2021-06-05 22:36:15,743 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) [2021-06-05 22:36:15,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 5619 transitions. [2021-06-05 22:36:15,746 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 5619 transitions. Word has length 24 [2021-06-05 22:36:15,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:15,746 INFO L482 AbstractCegarLoop]: Abstraction has 1605 states and 5619 transitions. [2021-06-05 22:36:15,746 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) [2021-06-05 22:36:15,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 5619 transitions. [2021-06-05 22:36:15,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:36:15,748 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:15,748 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:15,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:15,949 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:36:15,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:15,949 INFO L82 PathProgramCache]: Analyzing trace with hash 409417856, now seen corresponding path program 44 times [2021-06-05 22:36:15,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:15,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199443619] [2021-06-05 22:36:15,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:15,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:16,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:16,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:16,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199443619] [2021-06-05 22:36:16,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199443619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:16,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320064940] [2021-06-05 22:36:16,123 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 [2021-06-05 22:36:16,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:36:16,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:16,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:36:16,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:16,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:16,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:36:16,352 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 [2021-06-05 22:36:16,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:16,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:16,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:16,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 22:36:16,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:16,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320064940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:16,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:16,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:36:16,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579514661] [2021-06-05 22:36:16,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:36:16,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:16,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:36:16,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:36:16,387 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) [2021-06-05 22:36:17,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:17,437 INFO L93 Difference]: Finished difference Result 2169 states and 7374 transitions. [2021-06-05 22:36:17,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:36:17,437 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 [2021-06-05 22:36:17,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:17,441 INFO L225 Difference]: With dead ends: 2169 [2021-06-05 22:36:17,441 INFO L226 Difference]: Without dead ends: 2160 [2021-06-05 22:36:17,441 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 858.4ms TimeCoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:36:17,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2160 states. [2021-06-05 22:36:17,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2160 to 1607. [2021-06-05 22:36:17,462 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) [2021-06-05 22:36:17,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 5628 transitions. [2021-06-05 22:36:17,464 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 5628 transitions. Word has length 24 [2021-06-05 22:36:17,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:17,465 INFO L482 AbstractCegarLoop]: Abstraction has 1607 states and 5628 transitions. [2021-06-05 22:36:17,465 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) [2021-06-05 22:36:17,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 5628 transitions. [2021-06-05 22:36:17,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:36:17,467 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:17,467 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:17,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-05 22:36:17,667 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:36:17,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:17,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1098664202, now seen corresponding path program 45 times [2021-06-05 22:36:17,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:17,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282220148] [2021-06-05 22:36:17,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:17,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:17,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:17,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:17,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282220148] [2021-06-05 22:36:17,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282220148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:17,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604670846] [2021-06-05 22:36:17,934 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 [2021-06-05 22:36:17,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:36:17,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:17,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:36:17,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:18,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:18,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:36:18,163 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 [2021-06-05 22:36:18,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:18,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:18,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:18,168 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 22:36:18,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:18,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604670846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:18,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:18,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:36:18,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331044641] [2021-06-05 22:36:18,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:36:18,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:18,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:36:18,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:36:18,199 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) [2021-06-05 22:36:19,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:19,188 INFO L93 Difference]: Finished difference Result 2173 states and 7379 transitions. [2021-06-05 22:36:19,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:36:19,189 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 [2021-06-05 22:36:19,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:19,192 INFO L225 Difference]: With dead ends: 2173 [2021-06-05 22:36:19,192 INFO L226 Difference]: Without dead ends: 2163 [2021-06-05 22:36:19,192 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 939.4ms TimeCoverageRelationStatistics Valid=228, Invalid=1332, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:36:19,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-06-05 22:36:19,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1610. [2021-06-05 22:36:19,212 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) [2021-06-05 22:36:19,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 5636 transitions. [2021-06-05 22:36:19,215 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 5636 transitions. Word has length 24 [2021-06-05 22:36:19,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:19,215 INFO L482 AbstractCegarLoop]: Abstraction has 1610 states and 5636 transitions. [2021-06-05 22:36:19,215 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) [2021-06-05 22:36:19,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 5636 transitions. [2021-06-05 22:36:19,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:36:19,217 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:19,217 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:19,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:19,417 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:36:19,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:19,418 INFO L82 PathProgramCache]: Analyzing trace with hash 837579310, now seen corresponding path program 46 times [2021-06-05 22:36:19,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:19,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284820552] [2021-06-05 22:36:19,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:19,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:19,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:19,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:19,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284820552] [2021-06-05 22:36:19,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284820552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:19,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357250423] [2021-06-05 22:36:19,615 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 [2021-06-05 22:36:19,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:36:19,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:19,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:19,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:19,779 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 [2021-06-05 22:36:19,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:19,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:19,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:19,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 22:36:19,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:19,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357250423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:19,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:19,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:36:19,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109646209] [2021-06-05 22:36:19,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:36:19,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:19,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:36:19,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:36:19,809 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) [2021-06-05 22:36:20,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:20,876 INFO L93 Difference]: Finished difference Result 2159 states and 7353 transitions. [2021-06-05 22:36:20,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:36:20,877 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 [2021-06-05 22:36:20,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:20,880 INFO L225 Difference]: With dead ends: 2159 [2021-06-05 22:36:20,880 INFO L226 Difference]: Without dead ends: 2149 [2021-06-05 22:36:20,880 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 904.2ms TimeCoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:36:20,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-06-05 22:36:20,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1608. [2021-06-05 22:36:20,898 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) [2021-06-05 22:36:20,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 5632 transitions. [2021-06-05 22:36:20,901 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 5632 transitions. Word has length 24 [2021-06-05 22:36:20,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:20,901 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 5632 transitions. [2021-06-05 22:36:20,901 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) [2021-06-05 22:36:20,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 5632 transitions. [2021-06-05 22:36:20,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:36:20,903 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:20,903 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:21,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable230 [2021-06-05 22:36:21,103 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:36:21,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:21,104 INFO L82 PathProgramCache]: Analyzing trace with hash 661037878, now seen corresponding path program 47 times [2021-06-05 22:36:21,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:21,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542821982] [2021-06-05 22:36:21,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:21,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:21,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:21,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:21,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542821982] [2021-06-05 22:36:21,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542821982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:21,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021212619] [2021-06-05 22:36:21,267 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 [2021-06-05 22:36:21,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:36:21,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:21,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:21,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:21,405 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 [2021-06-05 22:36:21,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:21,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:21,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:21,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:36:21,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:21,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021212619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:21,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:21,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:36:21,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100213671] [2021-06-05 22:36:21,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:36:21,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:21,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:36:21,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:36:21,454 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) [2021-06-05 22:36:22,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:22,630 INFO L93 Difference]: Finished difference Result 2113 states and 7205 transitions. [2021-06-05 22:36:22,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:36:22,631 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 [2021-06-05 22:36:22,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:22,634 INFO L225 Difference]: With dead ends: 2113 [2021-06-05 22:36:22,634 INFO L226 Difference]: Without dead ends: 2104 [2021-06-05 22:36:22,634 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 880.4ms TimeCoverageRelationStatistics Valid=270, Invalid=1452, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:36:22,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-06-05 22:36:22,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1614. [2021-06-05 22:36:22,651 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) [2021-06-05 22:36:22,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 5648 transitions. [2021-06-05 22:36:22,654 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 5648 transitions. Word has length 24 [2021-06-05 22:36:22,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:22,654 INFO L482 AbstractCegarLoop]: Abstraction has 1614 states and 5648 transitions. [2021-06-05 22:36:22,654 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) [2021-06-05 22:36:22,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 5648 transitions. [2021-06-05 22:36:22,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:36:22,656 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:22,656 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:22,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:22,857 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:36:22,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:22,857 INFO L82 PathProgramCache]: Analyzing trace with hash -172700562, now seen corresponding path program 48 times [2021-06-05 22:36:22,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:22,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156031106] [2021-06-05 22:36:22,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:22,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:23,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:23,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:23,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156031106] [2021-06-05 22:36:23,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156031106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:23,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783615246] [2021-06-05 22:36:23,055 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 [2021-06-05 22:36:23,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:36:23,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:23,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:36:23,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:23,210 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:23,211 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 [2021-06-05 22:36:23,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:23,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:23,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:23,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:36:23,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:23,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783615246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:23,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:23,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:36:23,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622677365] [2021-06-05 22:36:23,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:36:23,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:23,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:36:23,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:36:23,310 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) [2021-06-05 22:36:24,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:24,756 INFO L93 Difference]: Finished difference Result 2241 states and 7546 transitions. [2021-06-05 22:36:24,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:36:24,756 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 [2021-06-05 22:36:24,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:24,760 INFO L225 Difference]: With dead ends: 2241 [2021-06-05 22:36:24,760 INFO L226 Difference]: Without dead ends: 2222 [2021-06-05 22:36:24,760 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1189.9ms TimeCoverageRelationStatistics Valid=348, Invalid=1722, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:36:24,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2021-06-05 22:36:24,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 1621. [2021-06-05 22:36:24,781 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) [2021-06-05 22:36:24,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 5678 transitions. [2021-06-05 22:36:24,784 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 5678 transitions. Word has length 24 [2021-06-05 22:36:24,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:24,784 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 5678 transitions. [2021-06-05 22:36:24,784 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) [2021-06-05 22:36:24,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 5678 transitions. [2021-06-05 22:36:24,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:36:24,786 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:24,786 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:24,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-06-05 22:36:24,986 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:36:24,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:24,987 INFO L82 PathProgramCache]: Analyzing trace with hash 609133238, now seen corresponding path program 49 times [2021-06-05 22:36:24,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:24,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693080517] [2021-06-05 22:36:24,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:24,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:25,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:25,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:25,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693080517] [2021-06-05 22:36:25,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693080517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:25,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004859015] [2021-06-05 22:36:25,145 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 [2021-06-05 22:36:25,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:25,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:25,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:25,284 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 [2021-06-05 22:36:25,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:25,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:25,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:25,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:36:25,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:25,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004859015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:25,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:25,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:36:25,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418105530] [2021-06-05 22:36:25,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:36:25,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:25,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:36:25,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:36:25,338 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) [2021-06-05 22:36:26,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:26,216 INFO L93 Difference]: Finished difference Result 2080 states and 7089 transitions. [2021-06-05 22:36:26,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:36:26,216 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 [2021-06-05 22:36:26,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:26,220 INFO L225 Difference]: With dead ends: 2080 [2021-06-05 22:36:26,220 INFO L226 Difference]: Without dead ends: 2070 [2021-06-05 22:36:26,220 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 773.1ms TimeCoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:36:26,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2021-06-05 22:36:26,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 1615. [2021-06-05 22:36:26,237 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) [2021-06-05 22:36:26,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 5661 transitions. [2021-06-05 22:36:26,239 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 5661 transitions. Word has length 24 [2021-06-05 22:36:26,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:26,239 INFO L482 AbstractCegarLoop]: Abstraction has 1615 states and 5661 transitions. [2021-06-05 22:36:26,239 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) [2021-06-05 22:36:26,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 5661 transitions. [2021-06-05 22:36:26,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:36:26,241 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:26,241 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:26,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 22:36:26,442 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:36:26,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:26,442 INFO L82 PathProgramCache]: Analyzing trace with hash -451513034, now seen corresponding path program 50 times [2021-06-05 22:36:26,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:26,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945927494] [2021-06-05 22:36:26,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:26,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:26,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:26,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945927494] [2021-06-05 22:36:26,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945927494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:26,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298644226] [2021-06-05 22:36:26,660 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 [2021-06-05 22:36:26,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:36:26,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:26,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:36:26,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:26,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:26,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:26,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:26,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:26,911 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 [2021-06-05 22:36:26,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:36:26,932 INFO L628 ElimStorePlain]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 22:36:26,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:26,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:33 [2021-06-05 22:36:27,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:27,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298644226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:27,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:27,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:36:27,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7468882] [2021-06-05 22:36:27,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:36:27,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:27,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:36:27,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:36:27,017 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) [2021-06-05 22:36:28,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:28,216 INFO L93 Difference]: Finished difference Result 2143 states and 7250 transitions. [2021-06-05 22:36:28,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:36:28,216 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 [2021-06-05 22:36:28,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:28,219 INFO L225 Difference]: With dead ends: 2143 [2021-06-05 22:36:28,219 INFO L226 Difference]: Without dead ends: 2116 [2021-06-05 22:36:28,220 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1089.2ms TimeCoverageRelationStatistics Valid=268, Invalid=1712, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:36:28,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2116 states. [2021-06-05 22:36:28,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2116 to 1621. [2021-06-05 22:36:28,238 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) [2021-06-05 22:36:28,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 5681 transitions. [2021-06-05 22:36:28,241 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 5681 transitions. Word has length 24 [2021-06-05 22:36:28,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:28,241 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 5681 transitions. [2021-06-05 22:36:28,241 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) [2021-06-05 22:36:28,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 5681 transitions. [2021-06-05 22:36:28,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:36:28,243 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:28,243 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:28,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-05 22:36:28,444 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:36:28,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:28,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1277158712, now seen corresponding path program 51 times [2021-06-05 22:36:28,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:28,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876171998] [2021-06-05 22:36:28,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:28,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:28,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:28,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:28,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876171998] [2021-06-05 22:36:28,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876171998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:28,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421992749] [2021-06-05 22:36:28,643 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 [2021-06-05 22:36:28,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:36:28,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:28,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:36:28,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:28,819 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:28,819 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 [2021-06-05 22:36:28,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:28,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:28,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:28,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 22:36:28,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:28,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421992749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:28,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:28,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:36:28,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995113275] [2021-06-05 22:36:28,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:36:28,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:28,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:36:28,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:36:28,889 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) [2021-06-05 22:36:30,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:30,665 INFO L93 Difference]: Finished difference Result 2143 states and 7279 transitions. [2021-06-05 22:36:30,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:36:30,666 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 [2021-06-05 22:36:30,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:30,669 INFO L225 Difference]: With dead ends: 2143 [2021-06-05 22:36:30,669 INFO L226 Difference]: Without dead ends: 2124 [2021-06-05 22:36:30,669 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 1491.4ms TimeCoverageRelationStatistics Valid=440, Invalid=2212, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 22:36:30,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2021-06-05 22:36:30,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 1623. [2021-06-05 22:36:30,687 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) [2021-06-05 22:36:30,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 5688 transitions. [2021-06-05 22:36:30,690 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 5688 transitions. Word has length 24 [2021-06-05 22:36:30,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:30,690 INFO L482 AbstractCegarLoop]: Abstraction has 1623 states and 5688 transitions. [2021-06-05 22:36:30,690 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) [2021-06-05 22:36:30,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 5688 transitions. [2021-06-05 22:36:30,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:36:30,692 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:30,692 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:30,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable242 [2021-06-05 22:36:30,893 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:36:30,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:30,893 INFO L82 PathProgramCache]: Analyzing trace with hash 249008852, now seen corresponding path program 52 times [2021-06-05 22:36:30,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:30,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592132551] [2021-06-05 22:36:30,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:30,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:31,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:31,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:31,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592132551] [2021-06-05 22:36:31,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592132551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:31,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706596165] [2021-06-05 22:36:31,058 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 [2021-06-05 22:36:31,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:36:31,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:31,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:31,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:31,191 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 [2021-06-05 22:36:31,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:31,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:31,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:31,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:36:31,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:31,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706596165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:31,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:31,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:36:31,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421339656] [2021-06-05 22:36:31,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:36:31,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:31,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:36:31,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:36:31,236 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) [2021-06-05 22:36:32,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:32,167 INFO L93 Difference]: Finished difference Result 2073 states and 7090 transitions. [2021-06-05 22:36:32,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:36:32,168 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 [2021-06-05 22:36:32,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:32,171 INFO L225 Difference]: With dead ends: 2073 [2021-06-05 22:36:32,171 INFO L226 Difference]: Without dead ends: 2063 [2021-06-05 22:36:32,171 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 781.6ms TimeCoverageRelationStatistics Valid=259, Invalid=1223, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:36:32,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-06-05 22:36:32,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1632. [2021-06-05 22:36:32,188 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) [2021-06-05 22:36:32,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 5718 transitions. [2021-06-05 22:36:32,191 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 5718 transitions. Word has length 24 [2021-06-05 22:36:32,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:32,191 INFO L482 AbstractCegarLoop]: Abstraction has 1632 states and 5718 transitions. [2021-06-05 22:36:32,191 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) [2021-06-05 22:36:32,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 5718 transitions. [2021-06-05 22:36:32,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:36:32,193 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:32,193 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:32,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 22:36:32,400 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:36:32,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:32,401 INFO L82 PathProgramCache]: Analyzing trace with hash 572595030, now seen corresponding path program 53 times [2021-06-05 22:36:32,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:32,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399845151] [2021-06-05 22:36:32,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:32,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:32,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:32,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:32,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399845151] [2021-06-05 22:36:32,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399845151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:32,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601384735] [2021-06-05 22:36:32,561 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 [2021-06-05 22:36:32,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:36:32,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:32,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:32,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:32,697 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 [2021-06-05 22:36:32,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:32,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:32,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:32,701 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:36:32,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:32,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601384735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:32,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:32,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:36:32,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855630945] [2021-06-05 22:36:32,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:36:32,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:32,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:36:32,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:36:32,747 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) [2021-06-05 22:36:33,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:33,598 INFO L93 Difference]: Finished difference Result 2042 states and 7006 transitions. [2021-06-05 22:36:33,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:36:33,599 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 [2021-06-05 22:36:33,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:33,601 INFO L225 Difference]: With dead ends: 2042 [2021-06-05 22:36:33,601 INFO L226 Difference]: Without dead ends: 2029 [2021-06-05 22:36:33,602 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 759.1ms TimeCoverageRelationStatistics Valid=237, Invalid=1169, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:36:33,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2021-06-05 22:36:33,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 1624. [2021-06-05 22:36:33,618 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) [2021-06-05 22:36:33,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 5692 transitions. [2021-06-05 22:36:33,621 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 5692 transitions. Word has length 24 [2021-06-05 22:36:33,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:33,621 INFO L482 AbstractCegarLoop]: Abstraction has 1624 states and 5692 transitions. [2021-06-05 22:36:33,621 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) [2021-06-05 22:36:33,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 5692 transitions. [2021-06-05 22:36:33,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:36:33,623 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:33,623 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:33,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 22:36:33,824 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:36:33,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:33,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1571465606, now seen corresponding path program 54 times [2021-06-05 22:36:33,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:33,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430101899] [2021-06-05 22:36:33,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:33,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:34,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:34,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:34,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430101899] [2021-06-05 22:36:34,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430101899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:34,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269957930] [2021-06-05 22:36:34,033 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 [2021-06-05 22:36:34,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:36:34,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:34,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:34,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:34,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:34,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:34,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:34,255 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 [2021-06-05 22:36:34,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:36:34,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:34,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:34,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-06-05 22:36:34,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:34,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269957930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:34,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:34,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:36:34,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226466380] [2021-06-05 22:36:34,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:36:34,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:34,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:36:34,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:36:34,326 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) [2021-06-05 22:36:35,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:35,335 INFO L93 Difference]: Finished difference Result 2123 states and 7198 transitions. [2021-06-05 22:36:35,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:36:35,336 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 [2021-06-05 22:36:35,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:35,339 INFO L225 Difference]: With dead ends: 2123 [2021-06-05 22:36:35,339 INFO L226 Difference]: Without dead ends: 2104 [2021-06-05 22:36:35,339 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 852.1ms TimeCoverageRelationStatistics Valid=246, Invalid=1476, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:36:35,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-06-05 22:36:35,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1630. [2021-06-05 22:36:35,358 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) [2021-06-05 22:36:35,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 5711 transitions. [2021-06-05 22:36:35,361 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 5711 transitions. Word has length 24 [2021-06-05 22:36:35,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:35,362 INFO L482 AbstractCegarLoop]: Abstraction has 1630 states and 5711 transitions. [2021-06-05 22:36:35,362 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) [2021-06-05 22:36:35,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 5711 transitions. [2021-06-05 22:36:35,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:36:35,364 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:35,364 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:35,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:35,564 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:36:35,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:35,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1459204208, now seen corresponding path program 55 times [2021-06-05 22:36:35,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:35,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585615985] [2021-06-05 22:36:35,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:35,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:35,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:35,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:35,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585615985] [2021-06-05 22:36:35,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585615985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:35,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159865092] [2021-06-05 22:36:35,782 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 [2021-06-05 22:36:35,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:35,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:35,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:35,945 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 [2021-06-05 22:36:35,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:35,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:35,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:35,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 22:36:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:35,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159865092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:35,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:35,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:36:35,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758954909] [2021-06-05 22:36:35,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:36:35,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:35,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:36:35,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:36:35,975 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) [2021-06-05 22:36:37,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:37,121 INFO L93 Difference]: Finished difference Result 2123 states and 7240 transitions. [2021-06-05 22:36:37,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:36:37,121 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 [2021-06-05 22:36:37,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:37,125 INFO L225 Difference]: With dead ends: 2123 [2021-06-05 22:36:37,125 INFO L226 Difference]: Without dead ends: 2113 [2021-06-05 22:36:37,125 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 927.6ms TimeCoverageRelationStatistics Valid=258, Invalid=1464, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:36:37,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2021-06-05 22:36:37,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 1629. [2021-06-05 22:36:37,145 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) [2021-06-05 22:36:37,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 5709 transitions. [2021-06-05 22:36:37,147 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 5709 transitions. Word has length 24 [2021-06-05 22:36:37,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:37,148 INFO L482 AbstractCegarLoop]: Abstraction has 1629 states and 5709 transitions. [2021-06-05 22:36:37,148 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) [2021-06-05 22:36:37,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 5709 transitions. [2021-06-05 22:36:37,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:36:37,150 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:37,150 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:37,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:37,350 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:36:37,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:37,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1635745640, now seen corresponding path program 56 times [2021-06-05 22:36:37,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:37,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662531873] [2021-06-05 22:36:37,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:37,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:37,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:37,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662531873] [2021-06-05 22:36:37,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662531873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:37,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559570078] [2021-06-05 22:36:37,550 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 [2021-06-05 22:36:37,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:36:37,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:37,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:36:37,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:37,699 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:37,699 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 [2021-06-05 22:36:37,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:37,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:37,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:37,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:36:37,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:37,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559570078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:37,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:37,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:36:37,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607471327] [2021-06-05 22:36:37,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:36:37,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:37,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:36:37,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:36:37,800 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) [2021-06-05 22:36:39,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:39,486 INFO L93 Difference]: Finished difference Result 2214 states and 7495 transitions. [2021-06-05 22:36:39,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:36:39,487 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 [2021-06-05 22:36:39,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:39,490 INFO L225 Difference]: With dead ends: 2214 [2021-06-05 22:36:39,490 INFO L226 Difference]: Without dead ends: 2195 [2021-06-05 22:36:39,490 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1410.3ms TimeCoverageRelationStatistics Valid=493, Invalid=2369, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 22:36:39,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2195 states. [2021-06-05 22:36:39,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2195 to 1638. [2021-06-05 22:36:39,510 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) [2021-06-05 22:36:39,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 5741 transitions. [2021-06-05 22:36:39,513 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 5741 transitions. Word has length 24 [2021-06-05 22:36:39,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:39,513 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 5741 transitions. [2021-06-05 22:36:39,513 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) [2021-06-05 22:36:39,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 5741 transitions. [2021-06-05 22:36:39,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:36:39,515 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:39,515 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:39,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:39,715 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:36:39,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:39,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1825483216, now seen corresponding path program 57 times [2021-06-05 22:36:39,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:39,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001554749] [2021-06-05 22:36:39,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:39,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:39,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:39,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:39,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001554749] [2021-06-05 22:36:39,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001554749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:39,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414050538] [2021-06-05 22:36:39,901 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 [2021-06-05 22:36:39,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:36:39,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:39,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:39,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:40,037 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 [2021-06-05 22:36:40,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:40,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:40,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:40,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:36:40,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:40,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414050538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:40,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:40,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:36:40,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630744178] [2021-06-05 22:36:40,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:36:40,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:40,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:36:40,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:36:40,086 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) [2021-06-05 22:36:41,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:41,109 INFO L93 Difference]: Finished difference Result 2105 states and 7183 transitions. [2021-06-05 22:36:41,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:36:41,109 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 [2021-06-05 22:36:41,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:41,112 INFO L225 Difference]: With dead ends: 2105 [2021-06-05 22:36:41,112 INFO L226 Difference]: Without dead ends: 2095 [2021-06-05 22:36:41,113 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 814.5ms TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:36:41,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2021-06-05 22:36:41,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 1636. [2021-06-05 22:36:41,131 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) [2021-06-05 22:36:41,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 5735 transitions. [2021-06-05 22:36:41,134 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 5735 transitions. Word has length 24 [2021-06-05 22:36:41,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:41,134 INFO L482 AbstractCegarLoop]: Abstraction has 1636 states and 5735 transitions. [2021-06-05 22:36:41,134 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) [2021-06-05 22:36:41,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 5735 transitions. [2021-06-05 22:36:41,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:36:41,136 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:41,136 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:41,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 22:36:41,338 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:36:41,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:41,338 INFO L82 PathProgramCache]: Analyzing trace with hash 224079120, now seen corresponding path program 58 times [2021-06-05 22:36:41,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:41,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821987280] [2021-06-05 22:36:41,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:41,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:41,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821987280] [2021-06-05 22:36:41,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821987280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:41,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447752759] [2021-06-05 22:36:41,578 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 [2021-06-05 22:36:41,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:36:41,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:41,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:41,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:41,798 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 [2021-06-05 22:36:41,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:41,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:41,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:41,800 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:36:41,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:41,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447752759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:41,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:41,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:36:41,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844607178] [2021-06-05 22:36:41,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:36:41,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:41,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:36:41,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:36:41,829 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) [2021-06-05 22:36:42,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:42,999 INFO L93 Difference]: Finished difference Result 2128 states and 7250 transitions. [2021-06-05 22:36:43,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:36:43,000 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 [2021-06-05 22:36:43,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:43,003 INFO L225 Difference]: With dead ends: 2128 [2021-06-05 22:36:43,003 INFO L226 Difference]: Without dead ends: 2109 [2021-06-05 22:36:43,003 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 890.3ms TimeCoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:36:43,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2109 states. [2021-06-05 22:36:43,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2109 to 1643. [2021-06-05 22:36:43,022 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) [2021-06-05 22:36:43,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 5763 transitions. [2021-06-05 22:36:43,025 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 5763 transitions. Word has length 24 [2021-06-05 22:36:43,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:43,026 INFO L482 AbstractCegarLoop]: Abstraction has 1643 states and 5763 transitions. [2021-06-05 22:36:43,026 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) [2021-06-05 22:36:43,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 5763 transitions. [2021-06-05 22:36:43,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:36:43,028 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:43,028 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:43,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 22:36:43,228 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:36:43,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:43,229 INFO L82 PathProgramCache]: Analyzing trace with hash -804070740, now seen corresponding path program 59 times [2021-06-05 22:36:43,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:43,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763292140] [2021-06-05 22:36:43,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:43,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:43,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763292140] [2021-06-05 22:36:43,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763292140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:43,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785722360] [2021-06-05 22:36:43,424 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 [2021-06-05 22:36:43,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:36:43,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:43,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:43,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:43,562 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 [2021-06-05 22:36:43,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:43,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:43,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:43,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:36:43,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:43,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785722360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:43,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:43,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:36:43,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190199779] [2021-06-05 22:36:43,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:36:43,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:43,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:36:43,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:36:43,607 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) [2021-06-05 22:36:44,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:44,398 INFO L93 Difference]: Finished difference Result 2129 states and 7275 transitions. [2021-06-05 22:36:44,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:36:44,398 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 [2021-06-05 22:36:44,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:44,402 INFO L225 Difference]: With dead ends: 2129 [2021-06-05 22:36:44,402 INFO L226 Difference]: Without dead ends: 2119 [2021-06-05 22:36:44,402 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 723.4ms TimeCoverageRelationStatistics Valid=242, Invalid=1164, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:36:44,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2021-06-05 22:36:44,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 1651. [2021-06-05 22:36:44,423 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) [2021-06-05 22:36:44,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5790 transitions. [2021-06-05 22:36:44,426 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5790 transitions. Word has length 24 [2021-06-05 22:36:44,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:44,426 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5790 transitions. [2021-06-05 22:36:44,426 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) [2021-06-05 22:36:44,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5790 transitions. [2021-06-05 22:36:44,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:36:44,428 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:44,429 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:44,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 22:36:44,629 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:36:44,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:44,629 INFO L82 PathProgramCache]: Analyzing trace with hash -480484562, now seen corresponding path program 60 times [2021-06-05 22:36:44,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:44,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881089087] [2021-06-05 22:36:44,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:44,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:44,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:44,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:44,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881089087] [2021-06-05 22:36:44,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881089087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:44,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122828997] [2021-06-05 22:36:44,792 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 [2021-06-05 22:36:44,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:36:44,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:44,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:36:44,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:44,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:44,943 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 21 treesize of output 29 [2021-06-05 22:36:44,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:44,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:44,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:44,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:36:45,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:45,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122828997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:45,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:45,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:36:45,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633714945] [2021-06-05 22:36:45,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:36:45,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:45,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:36:45,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:36:45,047 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) [2021-06-05 22:36:46,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:46,104 INFO L93 Difference]: Finished difference Result 2134 states and 7234 transitions. [2021-06-05 22:36:46,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:36:46,104 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 [2021-06-05 22:36:46,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:46,107 INFO L225 Difference]: With dead ends: 2134 [2021-06-05 22:36:46,107 INFO L226 Difference]: Without dead ends: 2115 [2021-06-05 22:36:46,107 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 917.5ms TimeCoverageRelationStatistics Valid=294, Invalid=1346, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:36:46,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2021-06-05 22:36:46,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1650. [2021-06-05 22:36:46,126 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) [2021-06-05 22:36:46,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 5789 transitions. [2021-06-05 22:36:46,129 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 5789 transitions. Word has length 24 [2021-06-05 22:36:46,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:46,129 INFO L482 AbstractCegarLoop]: Abstraction has 1650 states and 5789 transitions. [2021-06-05 22:36:46,129 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) [2021-06-05 22:36:46,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 5789 transitions. [2021-06-05 22:36:46,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:36:46,131 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:46,131 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:46,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-06-05 22:36:46,332 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:36:46,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:46,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1205259560, now seen corresponding path program 61 times [2021-06-05 22:36:46,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:46,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662263759] [2021-06-05 22:36:46,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:46,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:46,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:46,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662263759] [2021-06-05 22:36:46,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662263759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:46,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107719579] [2021-06-05 22:36:46,490 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 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 [2021-06-05 22:36:46,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:46,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:46,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:46,628 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 [2021-06-05 22:36:46,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:46,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:46,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:46,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:36:46,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:46,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107719579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:46,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:46,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:36:46,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721319590] [2021-06-05 22:36:46,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:36:46,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:46,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:36:46,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:36:46,674 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) [2021-06-05 22:36:47,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:47,456 INFO L93 Difference]: Finished difference Result 2040 states and 6997 transitions. [2021-06-05 22:36:47,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:36:47,456 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 [2021-06-05 22:36:47,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:47,459 INFO L225 Difference]: With dead ends: 2040 [2021-06-05 22:36:47,459 INFO L226 Difference]: Without dead ends: 2027 [2021-06-05 22:36:47,459 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 648.5ms TimeCoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:36:47,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-06-05 22:36:47,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1645. [2021-06-05 22:36:47,479 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) [2021-06-05 22:36:47,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 5770 transitions. [2021-06-05 22:36:47,482 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 5770 transitions. Word has length 24 [2021-06-05 22:36:47,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:47,482 INFO L482 AbstractCegarLoop]: Abstraction has 1645 states and 5770 transitions. [2021-06-05 22:36:47,483 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) [2021-06-05 22:36:47,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 5770 transitions. [2021-06-05 22:36:47,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:36:47,485 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:47,485 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:47,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:47,685 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:36:47,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:47,685 INFO L82 PathProgramCache]: Analyzing trace with hash 843525824, now seen corresponding path program 62 times [2021-06-05 22:36:47,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:47,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035596471] [2021-06-05 22:36:47,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:47,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:47,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:47,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:47,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035596471] [2021-06-05 22:36:47,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035596471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:47,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669187305] [2021-06-05 22:36:47,887 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 [2021-06-05 22:36:47,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:36:47,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:47,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:36:47,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:48,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:48,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:36:48,127 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 [2021-06-05 22:36:48,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:48,137 INFO L628 ElimStorePlain]: treesize reduction 3, result has 85.0 percent of original size [2021-06-05 22:36:48,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:48,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:17 [2021-06-05 22:36:48,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:48,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669187305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:48,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:48,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:36:48,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603208478] [2021-06-05 22:36:48,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:36:48,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:48,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:36:48,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:36:48,187 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) [2021-06-05 22:36:48,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:48,892 INFO L93 Difference]: Finished difference Result 2123 states and 7208 transitions. [2021-06-05 22:36:48,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:36:48,893 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 [2021-06-05 22:36:48,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:48,896 INFO L225 Difference]: With dead ends: 2123 [2021-06-05 22:36:48,896 INFO L226 Difference]: Without dead ends: 2071 [2021-06-05 22:36:48,896 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 545.3ms TimeCoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:36:48,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-06-05 22:36:48,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1648. [2021-06-05 22:36:48,918 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) [2021-06-05 22:36:48,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 5779 transitions. [2021-06-05 22:36:48,921 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 5779 transitions. Word has length 24 [2021-06-05 22:36:48,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:48,921 INFO L482 AbstractCegarLoop]: Abstraction has 1648 states and 5779 transitions. [2021-06-05 22:36:48,921 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) [2021-06-05 22:36:48,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 5779 transitions. [2021-06-05 22:36:48,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:36:48,923 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:48,923 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:49,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:49,123 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:36:49,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:49,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1060950710, now seen corresponding path program 63 times [2021-06-05 22:36:49,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:49,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404308736] [2021-06-05 22:36:49,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:49,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:49,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:49,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:49,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404308736] [2021-06-05 22:36:49,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404308736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:49,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007565200] [2021-06-05 22:36:49,304 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 [2021-06-05 22:36:49,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:36:49,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:49,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:36:49,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:49,472 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:49,473 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 [2021-06-05 22:36:49,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:49,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:49,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:49,488 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:37 [2021-06-05 22:36:49,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:49,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007565200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:49,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:49,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 22:36:49,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358660761] [2021-06-05 22:36:49,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:36:49,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:49,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:36:49,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:36:49,663 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) [2021-06-05 22:36:50,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:50,731 INFO L93 Difference]: Finished difference Result 2110 states and 7189 transitions. [2021-06-05 22:36:50,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:36:50,732 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 [2021-06-05 22:36:50,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:50,735 INFO L225 Difference]: With dead ends: 2110 [2021-06-05 22:36:50,735 INFO L226 Difference]: Without dead ends: 2091 [2021-06-05 22:36:50,735 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 947.0ms TimeCoverageRelationStatistics Valid=269, Invalid=1537, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:36:50,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-06-05 22:36:50,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1651. [2021-06-05 22:36:50,754 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) [2021-06-05 22:36:50,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5790 transitions. [2021-06-05 22:36:50,757 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5790 transitions. Word has length 24 [2021-06-05 22:36:50,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:50,757 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5790 transitions. [2021-06-05 22:36:50,757 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) [2021-06-05 22:36:50,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5790 transitions. [2021-06-05 22:36:50,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:36:50,760 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:50,760 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:50,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:50,960 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:36:50,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:50,960 INFO L82 PathProgramCache]: Analyzing trace with hash 227212270, now seen corresponding path program 64 times [2021-06-05 22:36:50,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:50,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546175659] [2021-06-05 22:36:50,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:50,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:51,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:51,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:51,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546175659] [2021-06-05 22:36:51,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546175659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:51,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498929446] [2021-06-05 22:36:51,131 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 [2021-06-05 22:36:51,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:36:51,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:51,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:51,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:51,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-05 22:36:51,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:51,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:51,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:51,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:36:51,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:51,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498929446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:51,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:51,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:36:51,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959743385] [2021-06-05 22:36:51,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:36:51,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:51,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:36:51,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:36:51,311 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) [2021-06-05 22:36:52,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:52,256 INFO L93 Difference]: Finished difference Result 2132 states and 7279 transitions. [2021-06-05 22:36:52,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:36:52,256 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 [2021-06-05 22:36:52,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:52,259 INFO L225 Difference]: With dead ends: 2132 [2021-06-05 22:36:52,259 INFO L226 Difference]: Without dead ends: 2119 [2021-06-05 22:36:52,259 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 751.5ms TimeCoverageRelationStatistics Valid=248, Invalid=1312, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:36:52,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2021-06-05 22:36:52,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 1649. [2021-06-05 22:36:52,278 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) [2021-06-05 22:36:52,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 5784 transitions. [2021-06-05 22:36:52,281 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 5784 transitions. Word has length 24 [2021-06-05 22:36:52,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:52,281 INFO L482 AbstractCegarLoop]: Abstraction has 1649 states and 5784 transitions. [2021-06-05 22:36:52,281 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) [2021-06-05 22:36:52,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 5784 transitions. [2021-06-05 22:36:52,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:36:52,283 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:52,283 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:52,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:52,485 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:36:52,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:52,485 INFO L82 PathProgramCache]: Analyzing trace with hash -605413130, now seen corresponding path program 65 times [2021-06-05 22:36:52,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:52,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970709493] [2021-06-05 22:36:52,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:52,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:52,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:52,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:52,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970709493] [2021-06-05 22:36:52,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970709493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:52,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165705236] [2021-06-05 22:36:52,650 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 [2021-06-05 22:36:52,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:36:52,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:52,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:52,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:52,767 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 [2021-06-05 22:36:52,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:52,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:52,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:52,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:36:52,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:52,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165705236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:52,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:52,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:36:52,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470384072] [2021-06-05 22:36:52,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:36:52,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:52,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:36:52,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:36:52,828 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) [2021-06-05 22:36:53,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:53,696 INFO L93 Difference]: Finished difference Result 2060 states and 7057 transitions. [2021-06-05 22:36:53,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:36:53,696 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 [2021-06-05 22:36:53,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:53,699 INFO L225 Difference]: With dead ends: 2060 [2021-06-05 22:36:53,699 INFO L226 Difference]: Without dead ends: 2051 [2021-06-05 22:36:53,700 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 738.5ms TimeCoverageRelationStatistics Valid=248, Invalid=1234, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:36:53,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-06-05 22:36:53,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1653. [2021-06-05 22:36:53,719 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) [2021-06-05 22:36:53,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 5797 transitions. [2021-06-05 22:36:53,721 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 5797 transitions. Word has length 24 [2021-06-05 22:36:53,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:53,721 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 5797 transitions. [2021-06-05 22:36:53,721 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) [2021-06-05 22:36:53,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 5797 transitions. [2021-06-05 22:36:53,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:36:53,723 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:53,723 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:53,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:53,924 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:36:53,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:53,924 INFO L82 PathProgramCache]: Analyzing trace with hash -281826952, now seen corresponding path program 66 times [2021-06-05 22:36:53,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:53,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833726252] [2021-06-05 22:36:53,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:53,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:54,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:54,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:54,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833726252] [2021-06-05 22:36:54,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833726252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:54,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078340472] [2021-06-05 22:36:54,074 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 [2021-06-05 22:36:54,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:36:54,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:54,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:36:54,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:54,208 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:54,208 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 [2021-06-05 22:36:54,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:54,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:54,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:54,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 22:36:54,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:54,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078340472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:54,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:54,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:36:54,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275656516] [2021-06-05 22:36:54,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:36:54,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:54,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:36:54,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:36:54,347 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) [2021-06-05 22:36:55,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:55,642 INFO L93 Difference]: Finished difference Result 2157 states and 7303 transitions. [2021-06-05 22:36:55,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:36:55,642 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 [2021-06-05 22:36:55,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:55,645 INFO L225 Difference]: With dead ends: 2157 [2021-06-05 22:36:55,645 INFO L226 Difference]: Without dead ends: 2138 [2021-06-05 22:36:55,645 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1063.7ms TimeCoverageRelationStatistics Valid=365, Invalid=1615, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:36:55,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-06-05 22:36:55,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1657. [2021-06-05 22:36:55,664 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) [2021-06-05 22:36:55,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 5813 transitions. [2021-06-05 22:36:55,667 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 5813 transitions. Word has length 24 [2021-06-05 22:36:55,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:55,667 INFO L482 AbstractCegarLoop]: Abstraction has 1657 states and 5813 transitions. [2021-06-05 22:36:55,667 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) [2021-06-05 22:36:55,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 5813 transitions. [2021-06-05 22:36:55,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:36:55,669 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:55,669 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:55,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:55,870 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:36:55,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:55,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1403917170, now seen corresponding path program 67 times [2021-06-05 22:36:55,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:55,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174957315] [2021-06-05 22:36:55,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:55,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:56,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:56,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:56,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174957315] [2021-06-05 22:36:56,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174957315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:56,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601698268] [2021-06-05 22:36:56,037 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 [2021-06-05 22:36:56,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:56,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:56,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:56,166 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 [2021-06-05 22:36:56,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:56,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:56,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:56,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:36:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:56,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601698268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:56,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:56,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:36:56,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080756576] [2021-06-05 22:36:56,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:36:56,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:56,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:36:56,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:36:56,238 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) [2021-06-05 22:36:57,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:57,035 INFO L93 Difference]: Finished difference Result 2022 states and 6937 transitions. [2021-06-05 22:36:57,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:36:57,035 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 [2021-06-05 22:36:57,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:57,039 INFO L225 Difference]: With dead ends: 2022 [2021-06-05 22:36:57,039 INFO L226 Difference]: Without dead ends: 2011 [2021-06-05 22:36:57,039 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 701.7ms TimeCoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:36:57,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2021-06-05 22:36:57,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 1656. [2021-06-05 22:36:57,059 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) [2021-06-05 22:36:57,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 5809 transitions. [2021-06-05 22:36:57,062 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 5809 transitions. Word has length 24 [2021-06-05 22:36:57,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:57,062 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 5809 transitions. [2021-06-05 22:36:57,062 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) [2021-06-05 22:36:57,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 5809 transitions. [2021-06-05 22:36:57,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:36:57,064 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:57,064 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:57,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-05 22:36:57,265 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:36:57,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:57,265 INFO L82 PathProgramCache]: Analyzing trace with hash -308336314, now seen corresponding path program 68 times [2021-06-05 22:36:57,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:57,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020350296] [2021-06-05 22:36:57,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:57,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:57,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:57,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:57,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020350296] [2021-06-05 22:36:57,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020350296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:57,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849659165] [2021-06-05 22:36:57,414 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 [2021-06-05 22:36:57,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:36:57,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:57,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:57,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:57,534 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 [2021-06-05 22:36:57,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:57,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:57,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:57,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:36:57,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:57,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849659165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:57,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:57,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:36:57,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22633045] [2021-06-05 22:36:57,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:36:57,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:57,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:36:57,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:36:57,596 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) [2021-06-05 22:36:58,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:58,486 INFO L93 Difference]: Finished difference Result 2080 states and 7118 transitions. [2021-06-05 22:36:58,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:36:58,486 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 [2021-06-05 22:36:58,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:58,489 INFO L225 Difference]: With dead ends: 2080 [2021-06-05 22:36:58,489 INFO L226 Difference]: Without dead ends: 2071 [2021-06-05 22:36:58,489 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 720.5ms TimeCoverageRelationStatistics Valid=242, Invalid=1240, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:36:58,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-06-05 22:36:58,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1657. [2021-06-05 22:36:58,507 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) [2021-06-05 22:36:58,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 5813 transitions. [2021-06-05 22:36:58,510 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 5813 transitions. Word has length 24 [2021-06-05 22:36:58,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:58,510 INFO L482 AbstractCegarLoop]: Abstraction has 1657 states and 5813 transitions. [2021-06-05 22:36:58,510 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) [2021-06-05 22:36:58,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 5813 transitions. [2021-06-05 22:36:58,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:36:58,512 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:58,512 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:58,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-05 22:36:58,728 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:36:58,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:58,728 INFO L82 PathProgramCache]: Analyzing trace with hash -2099197488, now seen corresponding path program 69 times [2021-06-05 22:36:58,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:58,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883966112] [2021-06-05 22:36:58,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:58,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:58,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:58,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:58,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883966112] [2021-06-05 22:36:58,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883966112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:58,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086439376] [2021-06-05 22:36:58,877 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 [2021-06-05 22:36:58,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:36:58,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:58,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:36:58,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:59,027 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:59,027 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 [2021-06-05 22:36:59,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:59,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:59,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:59,072 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:476 [2021-06-05 22:36:59,269 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-06-05 22:36:59,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:59,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086439376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:59,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:59,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 22:36:59,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502463527] [2021-06-05 22:36:59,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:36:59,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:59,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:36:59,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:36:59,554 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) [2021-06-05 22:37:00,486 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-06-05 22:37:01,189 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-06-05 22:37:01,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:01,792 INFO L93 Difference]: Finished difference Result 2129 states and 7217 transitions. [2021-06-05 22:37:01,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 22:37:01,792 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 [2021-06-05 22:37:01,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:01,795 INFO L225 Difference]: With dead ends: 2129 [2021-06-05 22:37:01,795 INFO L226 Difference]: Without dead ends: 2119 [2021-06-05 22:37:01,796 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 2307.1ms TimeCoverageRelationStatistics Valid=471, Invalid=2285, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 22:37:01,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2021-06-05 22:37:01,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 1661. [2021-06-05 22:37:01,820 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) [2021-06-05 22:37:01,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 5826 transitions. [2021-06-05 22:37:01,823 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 5826 transitions. Word has length 24 [2021-06-05 22:37:01,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:01,823 INFO L482 AbstractCegarLoop]: Abstraction has 1661 states and 5826 transitions. [2021-06-05 22:37:01,823 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) [2021-06-05 22:37:01,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 5826 transitions. [2021-06-05 22:37:01,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:37:01,825 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:01,825 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:02,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-05 22:37:02,026 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:37:02,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:02,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1317363688, now seen corresponding path program 70 times [2021-06-05 22:37:02,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:02,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239580431] [2021-06-05 22:37:02,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:02,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:02,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:02,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239580431] [2021-06-05 22:37:02,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239580431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:02,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146615517] [2021-06-05 22:37:02,182 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 [2021-06-05 22:37:02,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:37:02,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:02,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:37:02,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:02,303 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 [2021-06-05 22:37:02,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:02,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:02,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:02,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:37:02,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:02,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146615517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:02,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:02,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:37:02,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141042156] [2021-06-05 22:37:02,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:37:02,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:02,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:37:02,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:37:02,367 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) [2021-06-05 22:37:03,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:03,001 INFO L93 Difference]: Finished difference Result 2022 states and 6939 transitions. [2021-06-05 22:37:03,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:37:03,001 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 [2021-06-05 22:37:03,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:03,004 INFO L225 Difference]: With dead ends: 2022 [2021-06-05 22:37:03,004 INFO L226 Difference]: Without dead ends: 2012 [2021-06-05 22:37:03,004 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 594.3ms TimeCoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:37:03,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2012 states. [2021-06-05 22:37:03,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2012 to 1658. [2021-06-05 22:37:03,029 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) [2021-06-05 22:37:03,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 5815 transitions. [2021-06-05 22:37:03,032 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 5815 transitions. Word has length 24 [2021-06-05 22:37:03,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:03,032 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 5815 transitions. [2021-06-05 22:37:03,032 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) [2021-06-05 22:37:03,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 5815 transitions. [2021-06-05 22:37:03,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:37:03,034 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:03,034 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:03,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:03,237 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:37:03,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:03,237 INFO L82 PathProgramCache]: Analyzing trace with hash -372308144, now seen corresponding path program 71 times [2021-06-05 22:37:03,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:03,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905622576] [2021-06-05 22:37:03,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:03,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:03,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:03,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905622576] [2021-06-05 22:37:03,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905622576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:03,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587570749] [2021-06-05 22:37:03,415 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 [2021-06-05 22:37:03,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:37:03,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:03,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:37:03,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:03,551 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 [2021-06-05 22:37:03,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:03,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:03,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:03,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:37:03,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:03,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587570749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:03,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:03,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:37:03,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565485944] [2021-06-05 22:37:03,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:37:03,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:03,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:37:03,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:37:03,617 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) [2021-06-05 22:37:04,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:04,462 INFO L93 Difference]: Finished difference Result 2057 states and 7052 transitions. [2021-06-05 22:37:04,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:37:04,462 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 [2021-06-05 22:37:04,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:04,465 INFO L225 Difference]: With dead ends: 2057 [2021-06-05 22:37:04,466 INFO L226 Difference]: Without dead ends: 2046 [2021-06-05 22:37:04,466 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 690.7ms TimeCoverageRelationStatistics Valid=218, Invalid=1114, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:37:04,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-06-05 22:37:04,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1660. [2021-06-05 22:37:04,484 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) [2021-06-05 22:37:04,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 5821 transitions. [2021-06-05 22:37:04,486 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 5821 transitions. Word has length 24 [2021-06-05 22:37:04,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:04,487 INFO L482 AbstractCegarLoop]: Abstraction has 1660 states and 5821 transitions. [2021-06-05 22:37:04,487 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) [2021-06-05 22:37:04,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 5821 transitions. [2021-06-05 22:37:04,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:37:04,489 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:04,489 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:04,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:04,689 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:37:04,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:04,690 INFO L82 PathProgramCache]: Analyzing trace with hash 607106304, now seen corresponding path program 72 times [2021-06-05 22:37:04,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:04,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849974171] [2021-06-05 22:37:04,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:04,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:04,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:04,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:04,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849974171] [2021-06-05 22:37:04,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849974171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:04,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958910223] [2021-06-05 22:37:04,842 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 [2021-06-05 22:37:04,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:37:04,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:04,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:37:04,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:04,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:04,976 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 [2021-06-05 22:37:04,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:04,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:04,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:04,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 22:37:05,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:05,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958910223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:05,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:05,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:37:05,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163129364] [2021-06-05 22:37:05,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:37:05,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:05,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:37:05,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:37:05,103 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) [2021-06-05 22:37:06,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:06,428 INFO L93 Difference]: Finished difference Result 2168 states and 7318 transitions. [2021-06-05 22:37:06,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:37:06,428 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 [2021-06-05 22:37:06,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:06,431 INFO L225 Difference]: With dead ends: 2168 [2021-06-05 22:37:06,431 INFO L226 Difference]: Without dead ends: 2149 [2021-06-05 22:37:06,432 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1085.7ms TimeCoverageRelationStatistics Valid=387, Invalid=1775, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:37:06,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-06-05 22:37:06,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1662. [2021-06-05 22:37:06,450 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) [2021-06-05 22:37:06,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 5830 transitions. [2021-06-05 22:37:06,453 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 5830 transitions. Word has length 24 [2021-06-05 22:37:06,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:06,453 INFO L482 AbstractCegarLoop]: Abstraction has 1662 states and 5830 transitions. [2021-06-05 22:37:06,453 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) [2021-06-05 22:37:06,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 5830 transitions. [2021-06-05 22:37:06,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:37:06,455 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:06,455 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:06,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2021-06-05 22:37:06,656 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:37:06,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:06,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1967070794, now seen corresponding path program 73 times [2021-06-05 22:37:06,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:06,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621994546] [2021-06-05 22:37:06,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:06,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:06,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:06,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:06,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621994546] [2021-06-05 22:37:06,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621994546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:06,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004567238] [2021-06-05 22:37:06,906 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 [2021-06-05 22:37:06,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:06,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:37:06,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:07,088 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 [2021-06-05 22:37:07,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:07,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:07,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:07,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:37:07,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:07,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004567238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:07,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:07,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:37:07,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356628976] [2021-06-05 22:37:07,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:37:07,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:07,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:37:07,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:37:07,148 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) [2021-06-05 22:37:07,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:07,820 INFO L93 Difference]: Finished difference Result 2006 states and 6892 transitions. [2021-06-05 22:37:07,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:37:07,820 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 [2021-06-05 22:37:07,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:07,823 INFO L225 Difference]: With dead ends: 2006 [2021-06-05 22:37:07,823 INFO L226 Difference]: Without dead ends: 1996 [2021-06-05 22:37:07,823 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 660.6ms TimeCoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:37:07,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2021-06-05 22:37:07,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1660. [2021-06-05 22:37:07,840 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) [2021-06-05 22:37:07,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 5823 transitions. [2021-06-05 22:37:07,843 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 5823 transitions. Word has length 24 [2021-06-05 22:37:07,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:07,843 INFO L482 AbstractCegarLoop]: Abstraction has 1660 states and 5823 transitions. [2021-06-05 22:37:07,844 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) [2021-06-05 22:37:07,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 5823 transitions. [2021-06-05 22:37:07,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:37:07,845 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:07,846 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:08,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:08,046 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:37:08,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:08,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1147399810, now seen corresponding path program 69 times [2021-06-05 22:37:08,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:08,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595169277] [2021-06-05 22:37:08,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:08,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:08,220 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:08,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:08,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595169277] [2021-06-05 22:37:08,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595169277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:08,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620937572] [2021-06-05 22:37:08,220 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 [2021-06-05 22:37:08,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:37:08,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:08,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:37:08,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:08,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:37:08,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:37:08,449 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 22:37:08,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:08,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:08,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:08,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 22:37:08,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:08,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620937572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:08,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:08,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:37:08,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565569636] [2021-06-05 22:37:08,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:37:08,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:08,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:37:08,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:37:08,484 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) [2021-06-05 22:37:09,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:09,466 INFO L93 Difference]: Finished difference Result 2254 states and 7645 transitions. [2021-06-05 22:37:09,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:37:09,466 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 [2021-06-05 22:37:09,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:09,470 INFO L225 Difference]: With dead ends: 2254 [2021-06-05 22:37:09,470 INFO L226 Difference]: Without dead ends: 2244 [2021-06-05 22:37:09,470 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 743.1ms TimeCoverageRelationStatistics Valid=243, Invalid=1563, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:37:09,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2021-06-05 22:37:09,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 1663. [2021-06-05 22:37:09,496 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) [2021-06-05 22:37:09,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 5832 transitions. [2021-06-05 22:37:09,499 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 5832 transitions. Word has length 24 [2021-06-05 22:37:09,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:09,499 INFO L482 AbstractCegarLoop]: Abstraction has 1663 states and 5832 transitions. [2021-06-05 22:37:09,499 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) [2021-06-05 22:37:09,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 5832 transitions. [2021-06-05 22:37:09,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:37:09,501 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:09,501 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:09,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:09,701 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:37:09,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:09,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1639485428, now seen corresponding path program 70 times [2021-06-05 22:37:09,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:09,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161365952] [2021-06-05 22:37:09,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:09,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:09,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:09,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:09,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161365952] [2021-06-05 22:37:09,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161365952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:09,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812437948] [2021-06-05 22:37:09,869 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 [2021-06-05 22:37:09,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:37:09,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:09,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:37:09,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:10,050 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 [2021-06-05 22:37:10,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:10,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:10,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:10,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:37:10,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:10,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812437948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:10,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:10,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:37:10,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318669090] [2021-06-05 22:37:10,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:37:10,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:10,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:37:10,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:37:10,080 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) [2021-06-05 22:37:11,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:11,311 INFO L93 Difference]: Finished difference Result 2340 states and 7929 transitions. [2021-06-05 22:37:11,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:37:11,311 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 [2021-06-05 22:37:11,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:11,315 INFO L225 Difference]: With dead ends: 2340 [2021-06-05 22:37:11,315 INFO L226 Difference]: Without dead ends: 2318 [2021-06-05 22:37:11,315 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 913.4ms TimeCoverageRelationStatistics Valid=275, Invalid=1617, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:37:11,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2021-06-05 22:37:11,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 1666. [2021-06-05 22:37:11,338 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) [2021-06-05 22:37:11,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 5841 transitions. [2021-06-05 22:37:11,341 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 5841 transitions. Word has length 24 [2021-06-05 22:37:11,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:11,341 INFO L482 AbstractCegarLoop]: Abstraction has 1666 states and 5841 transitions. [2021-06-05 22:37:11,341 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) [2021-06-05 22:37:11,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 5841 transitions. [2021-06-05 22:37:11,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:37:11,343 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:11,343 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:11,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:11,544 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:37:11,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:11,544 INFO L82 PathProgramCache]: Analyzing trace with hash -719238356, now seen corresponding path program 71 times [2021-06-05 22:37:11,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:11,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743624252] [2021-06-05 22:37:11,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:11,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:11,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:11,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743624252] [2021-06-05 22:37:11,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743624252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:11,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258256160] [2021-06-05 22:37:11,719 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 [2021-06-05 22:37:11,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:37:11,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:11,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:37:11,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:12,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:37:12,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:37:12,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:37:12,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:37:12,015 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 [2021-06-05 22:37:12,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:12,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:12,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:12,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:5 [2021-06-05 22:37:12,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:12,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258256160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:12,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:12,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:37:12,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649967465] [2021-06-05 22:37:12,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:37:12,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:12,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:37:12,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:37:12,055 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) [2021-06-05 22:37:13,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:13,322 INFO L93 Difference]: Finished difference Result 2248 states and 7620 transitions. [2021-06-05 22:37:13,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:37:13,322 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 [2021-06-05 22:37:13,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:13,326 INFO L225 Difference]: With dead ends: 2248 [2021-06-05 22:37:13,326 INFO L226 Difference]: Without dead ends: 2226 [2021-06-05 22:37:13,326 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 977.4ms TimeCoverageRelationStatistics Valid=242, Invalid=1650, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:37:13,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-06-05 22:37:13,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1669. [2021-06-05 22:37:13,347 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) [2021-06-05 22:37:13,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 5850 transitions. [2021-06-05 22:37:13,350 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 5850 transitions. Word has length 24 [2021-06-05 22:37:13,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:13,350 INFO L482 AbstractCegarLoop]: Abstraction has 1669 states and 5850 transitions. [2021-06-05 22:37:13,350 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) [2021-06-05 22:37:13,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 5850 transitions. [2021-06-05 22:37:13,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:37:13,352 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:13,352 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:13,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:13,565 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:37:13,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:13,565 INFO L82 PathProgramCache]: Analyzing trace with hash -895779788, now seen corresponding path program 72 times [2021-06-05 22:37:13,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:13,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008452884] [2021-06-05 22:37:13,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:13,753 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:13,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:13,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008452884] [2021-06-05 22:37:13,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008452884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:13,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929573318] [2021-06-05 22:37:13,754 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 [2021-06-05 22:37:13,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:37:13,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:13,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:37:13,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:13,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:13,907 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 [2021-06-05 22:37:13,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:13,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:13,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:13,918 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:37:13,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:13,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929573318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:13,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:13,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:37:13,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87087078] [2021-06-05 22:37:13,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:37:13,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:13,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:37:13,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:37:13,994 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) [2021-06-05 22:37:14,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:14,943 INFO L93 Difference]: Finished difference Result 2232 states and 7581 transitions. [2021-06-05 22:37:14,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:37:14,944 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 [2021-06-05 22:37:14,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:14,947 INFO L225 Difference]: With dead ends: 2232 [2021-06-05 22:37:14,947 INFO L226 Difference]: Without dead ends: 2222 [2021-06-05 22:37:14,947 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 892.4ms TimeCoverageRelationStatistics Valid=310, Invalid=1760, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:37:14,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2021-06-05 22:37:14,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 1673. [2021-06-05 22:37:14,966 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) [2021-06-05 22:37:14,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 5861 transitions. [2021-06-05 22:37:14,969 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 5861 transitions. Word has length 24 [2021-06-05 22:37:14,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:14,969 INFO L482 AbstractCegarLoop]: Abstraction has 1673 states and 5861 transitions. [2021-06-05 22:37:14,969 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) [2021-06-05 22:37:14,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 5861 transitions. [2021-06-05 22:37:14,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:37:14,971 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:14,971 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:15,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-06-05 22:37:15,171 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:37:15,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:15,172 INFO L82 PathProgramCache]: Analyzing trace with hash -412454626, now seen corresponding path program 73 times [2021-06-05 22:37:15,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:15,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462303049] [2021-06-05 22:37:15,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:15,326 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:15,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:15,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462303049] [2021-06-05 22:37:15,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462303049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:15,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424842522] [2021-06-05 22:37:15,326 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 [2021-06-05 22:37:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:15,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:37:15,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:15,458 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 [2021-06-05 22:37:15,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:15,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:15,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:15,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:37:15,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:15,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424842522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:15,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:15,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:37:15,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019723790] [2021-06-05 22:37:15,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:37:15,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:15,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:37:15,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:37:15,506 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) [2021-06-05 22:37:16,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:16,368 INFO L93 Difference]: Finished difference Result 2202 states and 7495 transitions. [2021-06-05 22:37:16,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:37:16,368 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 [2021-06-05 22:37:16,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:16,371 INFO L225 Difference]: With dead ends: 2202 [2021-06-05 22:37:16,372 INFO L226 Difference]: Without dead ends: 2191 [2021-06-05 22:37:16,372 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 662.0ms TimeCoverageRelationStatistics Valid=245, Invalid=1395, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:37:16,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2191 states. [2021-06-05 22:37:16,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2191 to 1660. [2021-06-05 22:37:16,392 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) [2021-06-05 22:37:16,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 5823 transitions. [2021-06-05 22:37:16,395 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 5823 transitions. Word has length 24 [2021-06-05 22:37:16,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:16,395 INFO L482 AbstractCegarLoop]: Abstraction has 1660 states and 5823 transitions. [2021-06-05 22:37:16,395 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) [2021-06-05 22:37:16,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 5823 transitions. [2021-06-05 22:37:16,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:37:16,398 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:16,398 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:16,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-05 22:37:16,598 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:37:16,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:16,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1796534024, now seen corresponding path program 74 times [2021-06-05 22:37:16,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:16,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896329655] [2021-06-05 22:37:16,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:16,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:16,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896329655] [2021-06-05 22:37:16,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896329655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:16,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120402299] [2021-06-05 22:37:16,758 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 [2021-06-05 22:37:16,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:37:16,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:16,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:37:16,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:16,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:37:16,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:37:16,984 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 [2021-06-05 22:37:16,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:16,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:16,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:16,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 22:37:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:17,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120402299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:17,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:17,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:37:17,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255070842] [2021-06-05 22:37:17,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:37:17,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:17,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:37:17,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:37:17,019 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) [2021-06-05 22:37:18,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:18,029 INFO L93 Difference]: Finished difference Result 2228 states and 7569 transitions. [2021-06-05 22:37:18,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:37:18,030 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 [2021-06-05 22:37:18,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:18,033 INFO L225 Difference]: With dead ends: 2228 [2021-06-05 22:37:18,033 INFO L226 Difference]: Without dead ends: 2219 [2021-06-05 22:37:18,033 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 715.7ms TimeCoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:37:18,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2219 states. [2021-06-05 22:37:18,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2219 to 1663. [2021-06-05 22:37:18,053 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) [2021-06-05 22:37:18,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 5833 transitions. [2021-06-05 22:37:18,056 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 5833 transitions. Word has length 24 [2021-06-05 22:37:18,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:18,056 INFO L482 AbstractCegarLoop]: Abstraction has 1663 states and 5833 transitions. [2021-06-05 22:37:18,056 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) [2021-06-05 22:37:18,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 5833 transitions. [2021-06-05 22:37:18,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:37:18,058 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:18,058 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:18,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-06-05 22:37:18,259 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:37:18,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:18,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1586996644, now seen corresponding path program 75 times [2021-06-05 22:37:18,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:18,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494697986] [2021-06-05 22:37:18,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:18,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:18,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:18,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:18,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494697986] [2021-06-05 22:37:18,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494697986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:18,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492545684] [2021-06-05 22:37:18,434 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 [2021-06-05 22:37:18,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:37:18,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:18,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:37:18,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:18,598 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 [2021-06-05 22:37:18,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:18,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:18,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:18,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:37:18,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:18,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492545684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:18,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:18,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:37:18,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556101958] [2021-06-05 22:37:18,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:37:18,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:18,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:37:18,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:37:18,628 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) [2021-06-05 22:37:19,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:19,760 INFO L93 Difference]: Finished difference Result 2272 states and 7714 transitions. [2021-06-05 22:37:19,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:37:19,760 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 [2021-06-05 22:37:19,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:19,764 INFO L225 Difference]: With dead ends: 2272 [2021-06-05 22:37:19,764 INFO L226 Difference]: Without dead ends: 2253 [2021-06-05 22:37:19,764 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 860.4ms TimeCoverageRelationStatistics Valid=275, Invalid=1617, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:37:19,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2021-06-05 22:37:19,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 1666. [2021-06-05 22:37:19,784 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) [2021-06-05 22:37:19,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 5843 transitions. [2021-06-05 22:37:19,787 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 5843 transitions. Word has length 24 [2021-06-05 22:37:19,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:19,787 INFO L482 AbstractCegarLoop]: Abstraction has 1666 states and 5843 transitions. [2021-06-05 22:37:19,787 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) [2021-06-05 22:37:19,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 5843 transitions. [2021-06-05 22:37:19,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:37:19,789 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:19,789 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:19,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:19,989 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:37:19,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:19,989 INFO L82 PathProgramCache]: Analyzing trace with hash -979298906, now seen corresponding path program 76 times [2021-06-05 22:37:19,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:19,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329655197] [2021-06-05 22:37:19,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:20,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:20,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:20,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329655197] [2021-06-05 22:37:20,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329655197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:20,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324589815] [2021-06-05 22:37:20,181 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 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 [2021-06-05 22:37:20,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:37:20,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:20,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:37:20,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:20,341 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 [2021-06-05 22:37:20,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:20,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:20,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:20,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:37:20,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:20,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324589815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:20,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:20,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:37:20,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325517590] [2021-06-05 22:37:20,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:37:20,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:20,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:37:20,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:37:20,369 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) [2021-06-05 22:37:21,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:21,445 INFO L93 Difference]: Finished difference Result 2224 states and 7572 transitions. [2021-06-05 22:37:21,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:37:21,445 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 [2021-06-05 22:37:21,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:21,448 INFO L225 Difference]: With dead ends: 2224 [2021-06-05 22:37:21,448 INFO L226 Difference]: Without dead ends: 2205 [2021-06-05 22:37:21,449 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 842.1ms TimeCoverageRelationStatistics Valid=268, Invalid=1538, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:37:21,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2021-06-05 22:37:21,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 1669. [2021-06-05 22:37:21,467 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) [2021-06-05 22:37:21,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 5853 transitions. [2021-06-05 22:37:21,470 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 5853 transitions. Word has length 24 [2021-06-05 22:37:21,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:21,470 INFO L482 AbstractCegarLoop]: Abstraction has 1669 states and 5853 transitions. [2021-06-05 22:37:21,470 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) [2021-06-05 22:37:21,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 5853 transitions. [2021-06-05 22:37:21,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:37:21,472 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:21,472 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:21,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-06-05 22:37:21,672 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:37:21,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:21,672 INFO L82 PathProgramCache]: Analyzing trace with hash -2007448766, now seen corresponding path program 77 times [2021-06-05 22:37:21,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:21,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241503397] [2021-06-05 22:37:21,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:21,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:21,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:21,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:21,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241503397] [2021-06-05 22:37:21,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241503397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:21,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793805512] [2021-06-05 22:37:21,809 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 [2021-06-05 22:37:21,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:37:21,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:21,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:37:21,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:21,951 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 21 treesize of output 13 [2021-06-05 22:37:21,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:21,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:21,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:21,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:37:21,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:21,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793805512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:21,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:21,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:37:21,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262752295] [2021-06-05 22:37:21,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:37:21,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:21,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:37:21,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:37:21,997 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) [2021-06-05 22:37:22,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:22,678 INFO L93 Difference]: Finished difference Result 2193 states and 7486 transitions. [2021-06-05 22:37:22,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:37:22,679 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 [2021-06-05 22:37:22,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:22,682 INFO L225 Difference]: With dead ends: 2193 [2021-06-05 22:37:22,682 INFO L226 Difference]: Without dead ends: 2184 [2021-06-05 22:37:22,682 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 618.9ms TimeCoverageRelationStatistics Valid=221, Invalid=1111, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:37:22,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2021-06-05 22:37:22,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 1676. [2021-06-05 22:37:22,701 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) [2021-06-05 22:37:22,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5875 transitions. [2021-06-05 22:37:22,703 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5875 transitions. Word has length 24 [2021-06-05 22:37:22,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:22,704 INFO L482 AbstractCegarLoop]: Abstraction has 1676 states and 5875 transitions. [2021-06-05 22:37:22,704 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) [2021-06-05 22:37:22,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5875 transitions. [2021-06-05 22:37:22,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:37:22,706 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:22,706 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:22,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:22,906 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:37:22,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:22,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1881534, now seen corresponding path program 78 times [2021-06-05 22:37:22,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:22,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041971777] [2021-06-05 22:37:22,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:22,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:23,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:23,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:23,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041971777] [2021-06-05 22:37:23,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041971777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:23,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560878616] [2021-06-05 22:37:23,056 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 [2021-06-05 22:37:23,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:37:23,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:23,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 22:37:23,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:23,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:37:23,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:37:23,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:23,237 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 [2021-06-05 22:37:23,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:23,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:23,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:37:23,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:118 [2021-06-05 22:37:23,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:23,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560878616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:23,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:23,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 22:37:23,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074282257] [2021-06-05 22:37:23,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:37:23,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:23,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:37:23,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:37:23,375 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) [2021-06-05 22:37:24,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:24,366 INFO L93 Difference]: Finished difference Result 2099 states and 7191 transitions. [2021-06-05 22:37:24,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:37:24,366 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 [2021-06-05 22:37:24,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:24,370 INFO L225 Difference]: With dead ends: 2099 [2021-06-05 22:37:24,370 INFO L226 Difference]: Without dead ends: 2086 [2021-06-05 22:37:24,370 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 856.6ms TimeCoverageRelationStatistics Valid=247, Invalid=1475, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:37:24,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2021-06-05 22:37:24,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 1680. [2021-06-05 22:37:24,390 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) [2021-06-05 22:37:24,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 5890 transitions. [2021-06-05 22:37:24,393 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 5890 transitions. Word has length 24 [2021-06-05 22:37:24,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:24,393 INFO L482 AbstractCegarLoop]: Abstraction has 1680 states and 5890 transitions. [2021-06-05 22:37:24,393 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) [2021-06-05 22:37:24,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 5890 transitions. [2021-06-05 22:37:24,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:37:24,395 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:24,395 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:24,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:24,596 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:37:24,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:24,596 INFO L82 PathProgramCache]: Analyzing trace with hash -528846374, now seen corresponding path program 79 times [2021-06-05 22:37:24,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:24,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755776907] [2021-06-05 22:37:24,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:24,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:24,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:24,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:24,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755776907] [2021-06-05 22:37:24,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755776907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:24,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371404863] [2021-06-05 22:37:24,737 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 [2021-06-05 22:37:24,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:24,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:37:24,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:24,873 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 [2021-06-05 22:37:24,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:24,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:24,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:24,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:37:24,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:24,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371404863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:24,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:24,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:37:24,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965168112] [2021-06-05 22:37:24,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:37:24,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:24,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:37:24,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:37:24,920 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) [2021-06-05 22:37:25,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:25,662 INFO L93 Difference]: Finished difference Result 2165 states and 7395 transitions. [2021-06-05 22:37:25,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:37:25,662 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 [2021-06-05 22:37:25,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:25,665 INFO L225 Difference]: With dead ends: 2165 [2021-06-05 22:37:25,665 INFO L226 Difference]: Without dead ends: 2156 [2021-06-05 22:37:25,665 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 608.8ms TimeCoverageRelationStatistics Valid=207, Invalid=1125, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:37:25,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2021-06-05 22:37:25,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 1669. [2021-06-05 22:37:25,683 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) [2021-06-05 22:37:25,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 5851 transitions. [2021-06-05 22:37:25,686 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 5851 transitions. Word has length 24 [2021-06-05 22:37:25,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:25,686 INFO L482 AbstractCegarLoop]: Abstraction has 1669 states and 5851 transitions. [2021-06-05 22:37:25,686 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) [2021-06-05 22:37:25,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 5851 transitions. [2021-06-05 22:37:25,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:37:25,688 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:25,688 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:25,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-06-05 22:37:25,888 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:37:25,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:25,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1485847398, now seen corresponding path program 74 times [2021-06-05 22:37:25,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:25,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961721419] [2021-06-05 22:37:25,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:26,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:26,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:26,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961721419] [2021-06-05 22:37:26,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961721419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:26,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369818393] [2021-06-05 22:37:26,044 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 [2021-06-05 22:37:26,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:37:26,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:26,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:37:26,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:26,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:37:26,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:37:26,288 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 [2021-06-05 22:37:26,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:26,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:26,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:26,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 22:37:26,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:26,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369818393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:26,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:26,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:37:26,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488400575] [2021-06-05 22:37:26,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:37:26,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:26,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:37:26,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:37:26,325 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) [2021-06-05 22:37:27,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:27,805 INFO L93 Difference]: Finished difference Result 2362 states and 7905 transitions. [2021-06-05 22:37:27,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:37:27,806 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 [2021-06-05 22:37:27,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:27,809 INFO L225 Difference]: With dead ends: 2362 [2021-06-05 22:37:27,809 INFO L226 Difference]: Without dead ends: 2302 [2021-06-05 22:37:27,809 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1176.7ms TimeCoverageRelationStatistics Valid=341, Invalid=2109, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:37:27,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2302 states. [2021-06-05 22:37:27,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2302 to 1674. [2021-06-05 22:37:27,828 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) [2021-06-05 22:37:27,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 5866 transitions. [2021-06-05 22:37:27,831 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 5866 transitions. Word has length 24 [2021-06-05 22:37:27,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:27,831 INFO L482 AbstractCegarLoop]: Abstraction has 1674 states and 5866 transitions. [2021-06-05 22:37:27,831 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) [2021-06-05 22:37:27,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 5866 transitions. [2021-06-05 22:37:27,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:37:27,833 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:27,833 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:28,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-06-05 22:37:28,033 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:37:28,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:28,034 INFO L82 PathProgramCache]: Analyzing trace with hash -221549916, now seen corresponding path program 75 times [2021-06-05 22:37:28,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:28,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884579701] [2021-06-05 22:37:28,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:28,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:28,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:28,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884579701] [2021-06-05 22:37:28,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884579701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:28,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010760104] [2021-06-05 22:37:28,199 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 [2021-06-05 22:37:28,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:37:28,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:28,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:37:28,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:28,417 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 [2021-06-05 22:37:28,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:28,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:28,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:28,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:37:28,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:28,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010760104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:28,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:28,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:37:28,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314996046] [2021-06-05 22:37:28,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:37:28,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:28,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:37:28,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:37:28,452 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) [2021-06-05 22:37:29,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:29,998 INFO L93 Difference]: Finished difference Result 2284 states and 7716 transitions. [2021-06-05 22:37:29,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 22:37:29,998 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 [2021-06-05 22:37:29,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:30,002 INFO L225 Difference]: With dead ends: 2284 [2021-06-05 22:37:30,002 INFO L226 Difference]: Without dead ends: 2242 [2021-06-05 22:37:30,002 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 1241.2ms TimeCoverageRelationStatistics Valid=386, Invalid=2266, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 22:37:30,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2021-06-05 22:37:30,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 1677. [2021-06-05 22:37:30,020 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) [2021-06-05 22:37:30,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 5875 transitions. [2021-06-05 22:37:30,023 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 5875 transitions. Word has length 24 [2021-06-05 22:37:30,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:30,023 INFO L482 AbstractCegarLoop]: Abstraction has 1677 states and 5875 transitions. [2021-06-05 22:37:30,023 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) [2021-06-05 22:37:30,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 5875 transitions. [2021-06-05 22:37:30,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:37:30,025 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:30,025 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:30,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable317 [2021-06-05 22:37:30,226 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:37:30,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:30,226 INFO L82 PathProgramCache]: Analyzing trace with hash -398091348, now seen corresponding path program 76 times [2021-06-05 22:37:30,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:30,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065443194] [2021-06-05 22:37:30,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:30,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:30,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:30,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:30,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065443194] [2021-06-05 22:37:30,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065443194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:30,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714646118] [2021-06-05 22:37:30,369 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 [2021-06-05 22:37:30,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:37:30,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:30,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:37:30,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:30,629 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 [2021-06-05 22:37:30,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:30,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:30,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:30,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:37:30,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:30,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714646118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:30,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:30,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:37:30,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443910375] [2021-06-05 22:37:30,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:37:30,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:30,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:37:30,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:37:30,712 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) [2021-06-05 22:37:31,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:31,892 INFO L93 Difference]: Finished difference Result 2173 states and 7397 transitions. [2021-06-05 22:37:31,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:37:31,893 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 [2021-06-05 22:37:31,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:31,896 INFO L225 Difference]: With dead ends: 2173 [2021-06-05 22:37:31,896 INFO L226 Difference]: Without dead ends: 2143 [2021-06-05 22:37:31,896 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 995.5ms TimeCoverageRelationStatistics Valid=354, Invalid=1808, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:37:31,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2021-06-05 22:37:31,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 1679. [2021-06-05 22:37:31,914 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) [2021-06-05 22:37:31,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1679 states to 1679 states and 5882 transitions. [2021-06-05 22:37:31,917 INFO L78 Accepts]: Start accepts. Automaton has 1679 states and 5882 transitions. Word has length 24 [2021-06-05 22:37:31,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:31,917 INFO L482 AbstractCegarLoop]: Abstraction has 1679 states and 5882 transitions. [2021-06-05 22:37:31,917 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) [2021-06-05 22:37:31,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1679 states and 5882 transitions. [2021-06-05 22:37:31,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:37:31,919 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:31,919 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:32,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:32,135 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:37:32,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:32,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1231829788, now seen corresponding path program 77 times [2021-06-05 22:37:32,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:32,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805757266] [2021-06-05 22:37:32,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:32,325 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:32,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:32,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805757266] [2021-06-05 22:37:32,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805757266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:32,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754463342] [2021-06-05 22:37:32,326 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 [2021-06-05 22:37:32,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:37:32,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:32,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:37:32,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:32,478 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 [2021-06-05 22:37:32,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:32,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:32,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:32,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:37:32,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:32,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754463342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:32,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:32,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:37:32,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044832557] [2021-06-05 22:37:32,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:37:32,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:32,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:37:32,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:37:32,534 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) [2021-06-05 22:37:33,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:33,610 INFO L93 Difference]: Finished difference Result 2149 states and 7324 transitions. [2021-06-05 22:37:33,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:37:33,610 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 [2021-06-05 22:37:33,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:33,613 INFO L225 Difference]: With dead ends: 2149 [2021-06-05 22:37:33,613 INFO L226 Difference]: Without dead ends: 2123 [2021-06-05 22:37:33,613 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 867.8ms TimeCoverageRelationStatistics Valid=272, Invalid=1534, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:37:33,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2021-06-05 22:37:33,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 1671. [2021-06-05 22:37:33,631 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) [2021-06-05 22:37:33,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 5857 transitions. [2021-06-05 22:37:33,634 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 5857 transitions. Word has length 24 [2021-06-05 22:37:33,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:33,635 INFO L482 AbstractCegarLoop]: Abstraction has 1671 states and 5857 transitions. [2021-06-05 22:37:33,635 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) [2021-06-05 22:37:33,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 5857 transitions. [2021-06-05 22:37:33,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:37:33,637 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:33,637 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:33,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:33,854 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:37:33,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:33,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1241517520, now seen corresponding path program 80 times [2021-06-05 22:37:33,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:33,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346065101] [2021-06-05 22:37:33,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:33,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:34,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:34,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:34,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346065101] [2021-06-05 22:37:34,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346065101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:34,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072400353] [2021-06-05 22:37:34,048 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 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 [2021-06-05 22:37:34,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:37:34,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:34,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:37:34,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:34,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:37:34,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:37:34,324 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 [2021-06-05 22:37:34,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:34,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:34,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:34,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 22:37:34,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:34,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072400353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:34,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:34,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:37:34,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024549953] [2021-06-05 22:37:34,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:37:34,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:34,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:37:34,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:37:34,375 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) [2021-06-05 22:37:35,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:35,940 INFO L93 Difference]: Finished difference Result 2325 states and 7797 transitions. [2021-06-05 22:37:35,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:37:35,940 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 [2021-06-05 22:37:35,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:35,944 INFO L225 Difference]: With dead ends: 2325 [2021-06-05 22:37:35,944 INFO L226 Difference]: Without dead ends: 2275 [2021-06-05 22:37:35,944 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1286.7ms TimeCoverageRelationStatistics Valid=359, Invalid=2191, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:37:35,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2275 states. [2021-06-05 22:37:35,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2275 to 1674. [2021-06-05 22:37:35,964 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) [2021-06-05 22:37:35,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 5867 transitions. [2021-06-05 22:37:35,968 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 5867 transitions. Word has length 24 [2021-06-05 22:37:35,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:35,968 INFO L482 AbstractCegarLoop]: Abstraction has 1674 states and 5867 transitions. [2021-06-05 22:37:35,968 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) [2021-06-05 22:37:35,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 5867 transitions. [2021-06-05 22:37:35,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:37:35,970 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:35,970 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:36,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-06-05 22:37:36,187 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:37:36,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:36,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1324778030, now seen corresponding path program 81 times [2021-06-05 22:37:36,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:36,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325311800] [2021-06-05 22:37:36,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:36,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:36,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:36,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325311800] [2021-06-05 22:37:36,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325311800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:36,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542733577] [2021-06-05 22:37:36,399 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 [2021-06-05 22:37:36,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:37:36,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:36,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:37:36,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:36,606 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:36,606 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 [2021-06-05 22:37:36,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:36,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:36,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:36,617 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 22:37:36,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:36,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542733577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:36,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:36,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:37:36,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431610736] [2021-06-05 22:37:36,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:37:36,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:36,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:37:36,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:37:36,696 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) [2021-06-05 22:37:37,107 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2021-06-05 22:37:39,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:39,325 INFO L93 Difference]: Finished difference Result 2304 states and 7763 transitions. [2021-06-05 22:37:39,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 22:37:39,325 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 [2021-06-05 22:37:39,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:39,329 INFO L225 Difference]: With dead ends: 2304 [2021-06-05 22:37:39,329 INFO L226 Difference]: Without dead ends: 2265 [2021-06-05 22:37:39,329 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 2197.7ms TimeCoverageRelationStatistics Valid=579, Invalid=3327, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 22:37:39,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2021-06-05 22:37:39,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 1677. [2021-06-05 22:37:39,347 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) [2021-06-05 22:37:39,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 5877 transitions. [2021-06-05 22:37:39,350 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 5877 transitions. Word has length 24 [2021-06-05 22:37:39,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:39,350 INFO L482 AbstractCegarLoop]: Abstraction has 1677 states and 5877 transitions. [2021-06-05 22:37:39,351 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) [2021-06-05 22:37:39,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 5877 transitions. [2021-06-05 22:37:39,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:37:39,353 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:39,353 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:39,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable321,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:39,553 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:37:39,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:39,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1942039406, now seen corresponding path program 82 times [2021-06-05 22:37:39,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:39,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119850734] [2021-06-05 22:37:39,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:39,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:39,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:39,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:39,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119850734] [2021-06-05 22:37:39,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119850734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:39,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398564636] [2021-06-05 22:37:39,706 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 [2021-06-05 22:37:39,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:37:39,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:39,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:37:39,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:39,846 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 [2021-06-05 22:37:39,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:39,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:39,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:39,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:37:39,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:39,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398564636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:39,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:39,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:37:39,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982448830] [2021-06-05 22:37:39,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:37:39,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:39,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:37:39,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:37:39,892 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) [2021-06-05 22:37:40,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:40,998 INFO L93 Difference]: Finished difference Result 2148 states and 7323 transitions. [2021-06-05 22:37:40,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:37:40,999 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 [2021-06-05 22:37:40,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:41,002 INFO L225 Difference]: With dead ends: 2148 [2021-06-05 22:37:41,002 INFO L226 Difference]: Without dead ends: 2122 [2021-06-05 22:37:41,002 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 879.7ms TimeCoverageRelationStatistics Valid=329, Invalid=1651, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:37:41,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-06-05 22:37:41,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1680. [2021-06-05 22:37:41,019 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) [2021-06-05 22:37:41,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 5885 transitions. [2021-06-05 22:37:41,022 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 5885 transitions. Word has length 24 [2021-06-05 22:37:41,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:41,022 INFO L482 AbstractCegarLoop]: Abstraction has 1680 states and 5885 transitions. [2021-06-05 22:37:41,022 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) [2021-06-05 22:37:41,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 5885 transitions. [2021-06-05 22:37:41,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:37:41,024 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:41,024 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:41,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-06-05 22:37:41,225 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:37:41,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:41,225 INFO L82 PathProgramCache]: Analyzing trace with hash -2029341712, now seen corresponding path program 83 times [2021-06-05 22:37:41,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:41,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660572463] [2021-06-05 22:37:41,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:41,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:41,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:41,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:41,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660572463] [2021-06-05 22:37:41,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660572463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:41,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819410154] [2021-06-05 22:37:41,376 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 [2021-06-05 22:37:41,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:37:41,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:41,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:37:41,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:41,513 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 [2021-06-05 22:37:41,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:41,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:41,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:41,517 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:37:41,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:41,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819410154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:41,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:41,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:37:41,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402482205] [2021-06-05 22:37:41,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:37:41,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:41,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:37:41,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:37:41,560 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) [2021-06-05 22:37:42,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:42,443 INFO L93 Difference]: Finished difference Result 2123 states and 7249 transitions. [2021-06-05 22:37:42,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:37:42,444 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 [2021-06-05 22:37:42,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:42,447 INFO L225 Difference]: With dead ends: 2123 [2021-06-05 22:37:42,447 INFO L226 Difference]: Without dead ends: 2098 [2021-06-05 22:37:42,447 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 729.8ms TimeCoverageRelationStatistics Valid=234, Invalid=1248, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:37:42,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2021-06-05 22:37:42,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1671. [2021-06-05 22:37:42,465 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) [2021-06-05 22:37:42,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 5857 transitions. [2021-06-05 22:37:42,468 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 5857 transitions. Word has length 24 [2021-06-05 22:37:42,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:42,468 INFO L482 AbstractCegarLoop]: Abstraction has 1671 states and 5857 transitions. [2021-06-05 22:37:42,468 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) [2021-06-05 22:37:42,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 5857 transitions. [2021-06-05 22:37:42,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:37:42,471 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:42,471 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:42,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-06-05 22:37:42,675 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:37:42,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:42,675 INFO L82 PathProgramCache]: Analyzing trace with hash -738169602, now seen corresponding path program 78 times [2021-06-05 22:37:42,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:42,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193788989] [2021-06-05 22:37:42,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:42,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:42,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:42,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:42,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193788989] [2021-06-05 22:37:42,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193788989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:42,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455404412] [2021-06-05 22:37:42,829 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 [2021-06-05 22:37:42,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:37:42,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:42,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:37:42,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:43,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:37:43,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:37:43,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:43,040 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 [2021-06-05 22:37:43,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:37:43,066 INFO L628 ElimStorePlain]: treesize reduction 31, result has 44.6 percent of original size [2021-06-05 22:37:43,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:43,069 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2021-06-05 22:37:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:43,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455404412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:43,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:43,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:37:43,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888456998] [2021-06-05 22:37:43,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:37:43,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:43,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:37:43,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:37:43,129 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) [2021-06-05 22:37:45,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:45,165 INFO L93 Difference]: Finished difference Result 2486 states and 8299 transitions. [2021-06-05 22:37:45,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:37:45,166 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 [2021-06-05 22:37:45,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:45,169 INFO L225 Difference]: With dead ends: 2486 [2021-06-05 22:37:45,169 INFO L226 Difference]: Without dead ends: 2396 [2021-06-05 22:37:45,170 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1489.0ms TimeCoverageRelationStatistics Valid=418, Invalid=2774, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 22:37:45,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2396 states. [2021-06-05 22:37:45,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2396 to 1686. [2021-06-05 22:37:45,190 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) [2021-06-05 22:37:45,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 5906 transitions. [2021-06-05 22:37:45,193 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 5906 transitions. Word has length 24 [2021-06-05 22:37:45,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:45,193 INFO L482 AbstractCegarLoop]: Abstraction has 1686 states and 5906 transitions. [2021-06-05 22:37:45,193 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) [2021-06-05 22:37:45,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 5906 transitions. [2021-06-05 22:37:45,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:37:45,203 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:45,203 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:45,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-05 22:37:45,403 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:37:45,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:45,404 INFO L82 PathProgramCache]: Analyzing trace with hash -520744716, now seen corresponding path program 79 times [2021-06-05 22:37:45,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:45,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406073973] [2021-06-05 22:37:45,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:45,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:45,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:45,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:45,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406073973] [2021-06-05 22:37:45,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406073973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:45,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167348192] [2021-06-05 22:37:45,568 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 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 [2021-06-05 22:37:45,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:45,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:37:45,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:45,712 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 [2021-06-05 22:37:45,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:45,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:45,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:45,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:37:45,761 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:45,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167348192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:45,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:45,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:37:45,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014549988] [2021-06-05 22:37:45,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:37:45,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:45,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:37:45,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:37:45,762 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) [2021-06-05 22:37:47,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:47,551 INFO L93 Difference]: Finished difference Result 2547 states and 8513 transitions. [2021-06-05 22:37:47,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 22:37:47,551 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 [2021-06-05 22:37:47,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:47,555 INFO L225 Difference]: With dead ends: 2547 [2021-06-05 22:37:47,555 INFO L226 Difference]: Without dead ends: 2487 [2021-06-05 22:37:47,555 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 1506.0ms TimeCoverageRelationStatistics Valid=611, Invalid=2811, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 22:37:47,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2021-06-05 22:37:47,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 1726. [2021-06-05 22:37:47,576 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) [2021-06-05 22:37:47,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 6053 transitions. [2021-06-05 22:37:47,579 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 6053 transitions. Word has length 24 [2021-06-05 22:37:47,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:47,579 INFO L482 AbstractCegarLoop]: Abstraction has 1726 states and 6053 transitions. [2021-06-05 22:37:47,579 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) [2021-06-05 22:37:47,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 6053 transitions. [2021-06-05 22:37:47,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:37:47,581 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:47,581 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:47,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:47,797 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:37:47,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:47,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1354483156, now seen corresponding path program 80 times [2021-06-05 22:37:47,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:47,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795668805] [2021-06-05 22:37:47,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:47,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:47,973 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:47,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:47,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795668805] [2021-06-05 22:37:47,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795668805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:47,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666333546] [2021-06-05 22:37:47,975 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 [2021-06-05 22:37:48,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:37:48,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:48,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:37:48,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:48,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:48,117 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 [2021-06-05 22:37:48,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:48,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:48,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:48,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:37:48,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:48,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666333546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:48,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:48,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:37:48,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259282595] [2021-06-05 22:37:48,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:37:48,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:48,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:37:48,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:37:48,212 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) [2021-06-05 22:37:49,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:49,960 INFO L93 Difference]: Finished difference Result 2452 states and 8252 transitions. [2021-06-05 22:37:49,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 22:37:49,961 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 [2021-06-05 22:37:49,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:49,964 INFO L225 Difference]: With dead ends: 2452 [2021-06-05 22:37:49,964 INFO L226 Difference]: Without dead ends: 2401 [2021-06-05 22:37:49,964 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 1540.8ms TimeCoverageRelationStatistics Valid=551, Invalid=2989, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 22:37:49,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2401 states. [2021-06-05 22:37:49,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2401 to 1748. [2021-06-05 22:37:49,984 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) [2021-06-05 22:37:49,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 6125 transitions. [2021-06-05 22:37:49,987 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 6125 transitions. Word has length 24 [2021-06-05 22:37:49,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:49,987 INFO L482 AbstractCegarLoop]: Abstraction has 1748 states and 6125 transitions. [2021-06-05 22:37:49,987 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) [2021-06-05 22:37:49,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 6125 transitions. [2021-06-05 22:37:49,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:37:49,989 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:49,989 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:50,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:50,189 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:37:50,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:50,190 INFO L82 PathProgramCache]: Analyzing trace with hash -96000760, now seen corresponding path program 84 times [2021-06-05 22:37:50,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:50,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46405093] [2021-06-05 22:37:50,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:50,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:50,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:50,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:50,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46405093] [2021-06-05 22:37:50,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46405093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:50,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604449531] [2021-06-05 22:37:50,366 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 [2021-06-05 22:37:50,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:37:50,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:50,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:37:50,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:50,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:37:50,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:37:50,578 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 [2021-06-05 22:37:50,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:50,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:50,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:50,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 22:37:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:50,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604449531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:50,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:50,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:37:50,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797903731] [2021-06-05 22:37:50,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:37:50,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:50,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:37:50,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:37:50,610 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) [2021-06-05 22:37:52,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:52,997 INFO L93 Difference]: Finished difference Result 2604 states and 8741 transitions. [2021-06-05 22:37:52,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 22:37:52,998 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 [2021-06-05 22:37:52,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:53,001 INFO L225 Difference]: With dead ends: 2604 [2021-06-05 22:37:53,001 INFO L226 Difference]: Without dead ends: 2546 [2021-06-05 22:37:53,002 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 1923.3ms TimeCoverageRelationStatistics Valid=752, Invalid=3940, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 22:37:53,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2546 states. [2021-06-05 22:37:53,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2546 to 1755. [2021-06-05 22:37:53,022 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) [2021-06-05 22:37:53,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 6151 transitions. [2021-06-05 22:37:53,025 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 6151 transitions. Word has length 24 [2021-06-05 22:37:53,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:53,025 INFO L482 AbstractCegarLoop]: Abstraction has 1755 states and 6151 transitions. [2021-06-05 22:37:53,025 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) [2021-06-05 22:37:53,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 6151 transitions. [2021-06-05 22:37:53,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:37:53,027 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:53,027 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:53,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-05 22:37:53,227 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:37:53,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:53,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1124150620, now seen corresponding path program 85 times [2021-06-05 22:37:53,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:53,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410567930] [2021-06-05 22:37:53,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:53,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:53,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:53,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410567930] [2021-06-05 22:37:53,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410567930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:53,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526216640] [2021-06-05 22:37:53,366 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 [2021-06-05 22:37:53,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:53,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:37:53,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:53,495 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 [2021-06-05 22:37:53,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:53,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:53,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:53,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:37:53,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:53,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526216640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:53,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:53,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:37:53,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669748735] [2021-06-05 22:37:53,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:37:53,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:53,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:37:53,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:37:53,538 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) [2021-06-05 22:37:55,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:55,170 INFO L93 Difference]: Finished difference Result 2476 states and 8372 transitions. [2021-06-05 22:37:55,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 22:37:55,170 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 [2021-06-05 22:37:55,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:55,174 INFO L225 Difference]: With dead ends: 2476 [2021-06-05 22:37:55,174 INFO L226 Difference]: Without dead ends: 2434 [2021-06-05 22:37:55,174 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 1325.9ms TimeCoverageRelationStatistics Valid=536, Invalid=2544, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 22:37:55,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2434 states. [2021-06-05 22:37:55,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2434 to 1765. [2021-06-05 22:37:55,196 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) [2021-06-05 22:37:55,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 6183 transitions. [2021-06-05 22:37:55,199 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 6183 transitions. Word has length 24 [2021-06-05 22:37:55,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:55,199 INFO L482 AbstractCegarLoop]: Abstraction has 1765 states and 6183 transitions. [2021-06-05 22:37:55,200 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) [2021-06-05 22:37:55,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 6183 transitions. [2021-06-05 22:37:55,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:37:55,202 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:55,202 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:55,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-06-05 22:37:55,402 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:37:55,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:55,403 INFO L82 PathProgramCache]: Analyzing trace with hash -800564442, now seen corresponding path program 86 times [2021-06-05 22:37:55,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:55,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286318890] [2021-06-05 22:37:55,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:55,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:55,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:55,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286318890] [2021-06-05 22:37:55,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286318890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:55,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263308104] [2021-06-05 22:37:55,541 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 [2021-06-05 22:37:55,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:37:55,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:55,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:37:55,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:55,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:55,684 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 [2021-06-05 22:37:55,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:55,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:55,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:55,695 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:37:55,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:55,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263308104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:55,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:55,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:37:55,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971210530] [2021-06-05 22:37:55,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:37:55,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:55,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:37:55,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:37:55,779 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) [2021-06-05 22:37:57,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:57,946 INFO L93 Difference]: Finished difference Result 2476 states and 8307 transitions. [2021-06-05 22:37:57,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 22:37:57,946 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 [2021-06-05 22:37:57,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:57,950 INFO L225 Difference]: With dead ends: 2476 [2021-06-05 22:37:57,950 INFO L226 Difference]: Without dead ends: 2436 [2021-06-05 22:37:57,950 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 1798.3ms TimeCoverageRelationStatistics Valid=639, Invalid=3393, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 22:37:57,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-06-05 22:37:57,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 1773. [2021-06-05 22:37:57,972 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) [2021-06-05 22:37:57,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1773 states to 1773 states and 6211 transitions. [2021-06-05 22:37:57,975 INFO L78 Accepts]: Start accepts. Automaton has 1773 states and 6211 transitions. Word has length 24 [2021-06-05 22:37:57,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:57,976 INFO L482 AbstractCegarLoop]: Abstraction has 1773 states and 6211 transitions. [2021-06-05 22:37:57,976 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) [2021-06-05 22:37:57,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1773 states and 6211 transitions. [2021-06-05 22:37:57,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:37:57,978 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:57,978 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:58,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-06-05 22:37:58,178 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:37:58,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:58,179 INFO L82 PathProgramCache]: Analyzing trace with hash 885179680, now seen corresponding path program 87 times [2021-06-05 22:37:58,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:58,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903710919] [2021-06-05 22:37:58,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:58,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:58,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:58,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903710919] [2021-06-05 22:37:58,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903710919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:58,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718445244] [2021-06-05 22:37:58,334 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 [2021-06-05 22:37:58,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:37:58,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:58,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:37:58,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:58,473 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 [2021-06-05 22:37:58,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:58,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:58,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:58,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:37:58,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:58,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718445244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:58,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:58,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:37:58,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510635501] [2021-06-05 22:37:58,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:37:58,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:58,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:37:58,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:37:58,516 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) [2021-06-05 22:37:59,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:59,932 INFO L93 Difference]: Finished difference Result 2331 states and 7931 transitions. [2021-06-05 22:37:59,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 22:37:59,932 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 [2021-06-05 22:37:59,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:59,936 INFO L225 Difference]: With dead ends: 2331 [2021-06-05 22:37:59,936 INFO L226 Difference]: Without dead ends: 2310 [2021-06-05 22:37:59,936 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1173.3ms TimeCoverageRelationStatistics Valid=439, Invalid=2213, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 22:37:59,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-06-05 22:37:59,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1760. [2021-06-05 22:37:59,958 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) [2021-06-05 22:37:59,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 6167 transitions. [2021-06-05 22:37:59,961 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 6167 transitions. Word has length 24 [2021-06-05 22:37:59,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:59,961 INFO L482 AbstractCegarLoop]: Abstraction has 1760 states and 6167 transitions. [2021-06-05 22:37:59,962 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) [2021-06-05 22:37:59,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 6167 transitions. [2021-06-05 22:37:59,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:37:59,964 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:59,964 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:00,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2021-06-05 22:38:00,164 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:38:00,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:00,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1344157466, now seen corresponding path program 81 times [2021-06-05 22:38:00,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:00,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018746821] [2021-06-05 22:38:00,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:00,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:00,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:00,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018746821] [2021-06-05 22:38:00,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018746821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:00,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177340205] [2021-06-05 22:38:00,369 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 [2021-06-05 22:38:00,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:38:00,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:00,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 22:38:00,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:00,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:38:00,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:00,530 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 [2021-06-05 22:38:00,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:00,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:00,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:00,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:350 [2021-06-05 22:38:00,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:00,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177340205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:00,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:00,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 22:38:00,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680587687] [2021-06-05 22:38:00,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:38:00,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:00,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:38:00,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:38:00,871 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) [2021-06-05 22:38:01,479 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 39 [2021-06-05 22:38:01,614 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 37 [2021-06-05 22:38:03,627 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2021-06-05 22:38:04,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:04,240 INFO L93 Difference]: Finished difference Result 3383 states and 11252 transitions. [2021-06-05 22:38:04,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 22:38:04,240 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 [2021-06-05 22:38:04,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:04,245 INFO L225 Difference]: With dead ends: 3383 [2021-06-05 22:38:04,246 INFO L226 Difference]: Without dead ends: 3356 [2021-06-05 22:38:04,246 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1996 ImplicationChecksByTransitivity, 3026.5ms TimeCoverageRelationStatistics Valid=1107, Invalid=5373, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 22:38:04,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2021-06-05 22:38:04,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 1826. [2021-06-05 22:38:04,274 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) [2021-06-05 22:38:04,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 6444 transitions. [2021-06-05 22:38:04,277 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 6444 transitions. Word has length 24 [2021-06-05 22:38:04,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:04,277 INFO L482 AbstractCegarLoop]: Abstraction has 1826 states and 6444 transitions. [2021-06-05 22:38:04,277 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) [2021-06-05 22:38:04,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 6444 transitions. [2021-06-05 22:38:04,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:38:04,280 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:04,280 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:04,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:04,480 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:38:04,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:04,480 INFO L82 PathProgramCache]: Analyzing trace with hash -446703708, now seen corresponding path program 82 times [2021-06-05 22:38:04,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:04,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676686244] [2021-06-05 22:38:04,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:04,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:04,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:04,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:04,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676686244] [2021-06-05 22:38:04,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676686244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:04,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949934017] [2021-06-05 22:38:04,632 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 [2021-06-05 22:38:04,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:38:04,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:04,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:38:04,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:04,768 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 [2021-06-05 22:38:04,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:04,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:04,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:04,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:38:04,815 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:04,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949934017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:04,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:04,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:38:04,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973350828] [2021-06-05 22:38:04,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:38:04,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:04,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:38:04,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:38:04,816 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) [2021-06-05 22:38:07,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:07,184 INFO L93 Difference]: Finished difference Result 3469 states and 11530 transitions. [2021-06-05 22:38:07,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 22:38:07,184 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 [2021-06-05 22:38:07,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:07,190 INFO L225 Difference]: With dead ends: 3469 [2021-06-05 22:38:07,190 INFO L226 Difference]: Without dead ends: 3411 [2021-06-05 22:38:07,190 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2250 ImplicationChecksByTransitivity, 1991.1ms TimeCoverageRelationStatistics Valid=1048, Invalid=5432, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 22:38:07,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2021-06-05 22:38:07,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 1859. [2021-06-05 22:38:07,221 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) [2021-06-05 22:38:07,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 6585 transitions. [2021-06-05 22:38:07,225 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 6585 transitions. Word has length 24 [2021-06-05 22:38:07,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:07,225 INFO L482 AbstractCegarLoop]: Abstraction has 1859 states and 6585 transitions. [2021-06-05 22:38:07,225 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) [2021-06-05 22:38:07,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 6585 transitions. [2021-06-05 22:38:07,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:38:07,227 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:07,227 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:07,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:07,427 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:38:07,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:07,428 INFO L82 PathProgramCache]: Analyzing trace with hash -713337392, now seen corresponding path program 88 times [2021-06-05 22:38:07,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:07,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487195999] [2021-06-05 22:38:07,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:07,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:07,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:07,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:07,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487195999] [2021-06-05 22:38:07,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487195999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:07,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872312318] [2021-06-05 22:38:07,586 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 [2021-06-05 22:38:07,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:38:07,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:07,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:38:07,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:07,720 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 [2021-06-05 22:38:07,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:07,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:07,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:07,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:38:07,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:07,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872312318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:07,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:07,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:38:07,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736245833] [2021-06-05 22:38:07,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:38:07,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:07,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:38:07,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:38:07,768 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) [2021-06-05 22:38:09,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:09,920 INFO L93 Difference]: Finished difference Result 3517 states and 11694 transitions. [2021-06-05 22:38:09,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 22:38:09,920 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 [2021-06-05 22:38:09,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:09,925 INFO L225 Difference]: With dead ends: 3517 [2021-06-05 22:38:09,926 INFO L226 Difference]: Without dead ends: 3467 [2021-06-05 22:38:09,926 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 1760.1ms TimeCoverageRelationStatistics Valid=938, Invalid=4318, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 22:38:09,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3467 states. [2021-06-05 22:38:09,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3467 to 1918. [2021-06-05 22:38:09,957 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) [2021-06-05 22:38:09,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 6844 transitions. [2021-06-05 22:38:09,961 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 6844 transitions. Word has length 24 [2021-06-05 22:38:09,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:09,961 INFO L482 AbstractCegarLoop]: Abstraction has 1918 states and 6844 transitions. [2021-06-05 22:38:09,961 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) [2021-06-05 22:38:09,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 6844 transitions. [2021-06-05 22:38:09,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:38:09,963 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:09,963 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:10,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:10,164 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:38:10,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:10,164 INFO L82 PathProgramCache]: Analyzing trace with hash -389751214, now seen corresponding path program 89 times [2021-06-05 22:38:10,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:10,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983834511] [2021-06-05 22:38:10,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:10,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:10,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:10,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:10,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983834511] [2021-06-05 22:38:10,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983834511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:10,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513874360] [2021-06-05 22:38:10,302 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 [2021-06-05 22:38:10,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:38:10,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:10,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:38:10,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:10,433 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 21 treesize of output 13 [2021-06-05 22:38:10,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:10,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:10,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:10,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:38:10,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:10,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513874360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:10,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:10,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:38:10,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369063681] [2021-06-05 22:38:10,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:38:10,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:10,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:38:10,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:38:10,482 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) [2021-06-05 22:38:12,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:12,444 INFO L93 Difference]: Finished difference Result 3345 states and 11284 transitions. [2021-06-05 22:38:12,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 22:38:12,445 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 [2021-06-05 22:38:12,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:12,450 INFO L225 Difference]: With dead ends: 3345 [2021-06-05 22:38:12,450 INFO L226 Difference]: Without dead ends: 3302 [2021-06-05 22:38:12,450 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 1603.3ms TimeCoverageRelationStatistics Valid=813, Invalid=3879, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 22:38:12,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3302 states. [2021-06-05 22:38:12,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3302 to 1924. [2021-06-05 22:38:12,475 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) [2021-06-05 22:38:12,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 6881 transitions. [2021-06-05 22:38:12,478 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 6881 transitions. Word has length 24 [2021-06-05 22:38:12,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:12,478 INFO L482 AbstractCegarLoop]: Abstraction has 1924 states and 6881 transitions. [2021-06-05 22:38:12,478 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) [2021-06-05 22:38:12,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 6881 transitions. [2021-06-05 22:38:12,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:38:12,480 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:12,480 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:12,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable352 [2021-06-05 22:38:12,681 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:38:12,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:12,681 INFO L82 PathProgramCache]: Analyzing trace with hash 147171454, now seen corresponding path program 83 times [2021-06-05 22:38:12,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:12,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909093186] [2021-06-05 22:38:12,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:12,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:12,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:12,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909093186] [2021-06-05 22:38:12,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909093186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:12,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602343893] [2021-06-05 22:38:12,821 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 [2021-06-05 22:38:12,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:38:12,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:12,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:38:12,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:12,960 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 [2021-06-05 22:38:12,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:12,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:12,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:12,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:38:12,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:12,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602343893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:12,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:12,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:38:12,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84765026] [2021-06-05 22:38:12,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:38:12,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:12,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:38:12,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:38:12,993 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) [2021-06-05 22:38:15,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:15,285 INFO L93 Difference]: Finished difference Result 3554 states and 12008 transitions. [2021-06-05 22:38:15,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 22:38:15,286 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 [2021-06-05 22:38:15,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:15,291 INFO L225 Difference]: With dead ends: 3554 [2021-06-05 22:38:15,291 INFO L226 Difference]: Without dead ends: 3506 [2021-06-05 22:38:15,292 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 1822.4ms TimeCoverageRelationStatistics Valid=855, Invalid=3975, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 22:38:15,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3506 states. [2021-06-05 22:38:15,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3506 to 1958. [2021-06-05 22:38:15,332 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) [2021-06-05 22:38:15,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 7048 transitions. [2021-06-05 22:38:15,336 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 7048 transitions. Word has length 24 [2021-06-05 22:38:15,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:15,336 INFO L482 AbstractCegarLoop]: Abstraction has 1958 states and 7048 transitions. [2021-06-05 22:38:15,336 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) [2021-06-05 22:38:15,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 7048 transitions. [2021-06-05 22:38:15,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:38:15,338 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:15,338 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:15,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2021-06-05 22:38:15,554 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:38:15,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:15,555 INFO L82 PathProgramCache]: Analyzing trace with hash -57746680, now seen corresponding path program 90 times [2021-06-05 22:38:15,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:15,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99456281] [2021-06-05 22:38:15,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:15,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:15,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:15,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99456281] [2021-06-05 22:38:15,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99456281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:15,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624840524] [2021-06-05 22:38:15,700 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 [2021-06-05 22:38:15,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:38:15,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:15,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:38:15,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:15,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:15,853 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 [2021-06-05 22:38:15,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:15,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:15,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:15,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:27 [2021-06-05 22:38:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:15,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624840524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:15,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:15,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:38:15,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409611466] [2021-06-05 22:38:15,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:38:15,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:15,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:38:15,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:38:15,932 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) [2021-06-05 22:38:18,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:18,731 INFO L93 Difference]: Finished difference Result 3437 states and 11640 transitions. [2021-06-05 22:38:18,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 22:38:18,732 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 [2021-06-05 22:38:18,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:18,737 INFO L225 Difference]: With dead ends: 3437 [2021-06-05 22:38:18,737 INFO L226 Difference]: Without dead ends: 3407 [2021-06-05 22:38:18,737 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1979 ImplicationChecksByTransitivity, 2359.8ms TimeCoverageRelationStatistics Valid=1021, Invalid=4831, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 22:38:18,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3407 states. [2021-06-05 22:38:18,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3407 to 1969. [2021-06-05 22:38:18,767 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) [2021-06-05 22:38:18,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 7102 transitions. [2021-06-05 22:38:18,771 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 7102 transitions. Word has length 24 [2021-06-05 22:38:18,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:18,771 INFO L482 AbstractCegarLoop]: Abstraction has 1969 states and 7102 transitions. [2021-06-05 22:38:18,771 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) [2021-06-05 22:38:18,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 7102 transitions. [2021-06-05 22:38:18,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:38:18,773 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:18,773 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:18,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-06-05 22:38:18,974 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:38:18,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:18,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1627997442, now seen corresponding path program 91 times [2021-06-05 22:38:18,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:18,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442130536] [2021-06-05 22:38:18,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:18,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:19,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:19,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:19,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442130536] [2021-06-05 22:38:19,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442130536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:19,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951515814] [2021-06-05 22:38:19,117 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 [2021-06-05 22:38:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:19,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:38:19,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:19,260 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 [2021-06-05 22:38:19,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:19,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:19,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:19,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:38:19,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:19,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951515814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:19,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:19,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:38:19,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140910444] [2021-06-05 22:38:19,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:38:19,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:19,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:38:19,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:38:19,290 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) [2021-06-05 22:38:21,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:21,183 INFO L93 Difference]: Finished difference Result 3267 states and 11097 transitions. [2021-06-05 22:38:21,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 22:38:21,183 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 [2021-06-05 22:38:21,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:21,188 INFO L225 Difference]: With dead ends: 3267 [2021-06-05 22:38:21,188 INFO L226 Difference]: Without dead ends: 3232 [2021-06-05 22:38:21,189 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 1494.4ms TimeCoverageRelationStatistics Valid=656, Invalid=3004, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 22:38:21,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2021-06-05 22:38:21,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 1969. [2021-06-05 22:38:21,217 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) [2021-06-05 22:38:21,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 7102 transitions. [2021-06-05 22:38:21,220 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 7102 transitions. Word has length 24 [2021-06-05 22:38:21,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:21,220 INFO L482 AbstractCegarLoop]: Abstraction has 1969 states and 7102 transitions. [2021-06-05 22:38:21,220 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) [2021-06-05 22:38:21,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 7102 transitions. [2021-06-05 22:38:21,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:38:21,223 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:21,223 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:21,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-06-05 22:38:21,423 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:38:21,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:21,423 INFO L82 PathProgramCache]: Analyzing trace with hash -634589398, now seen corresponding path program 92 times [2021-06-05 22:38:21,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:21,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480139566] [2021-06-05 22:38:21,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:21,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:21,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:21,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480139566] [2021-06-05 22:38:21,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480139566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:21,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245931988] [2021-06-05 22:38:21,608 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 [2021-06-05 22:38:21,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:38:21,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:21,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:38:21,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:21,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:38:21,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:38:21,861 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 [2021-06-05 22:38:21,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:21,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:21,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:21,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 22:38:21,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:21,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245931988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:21,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:21,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:38:21,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506323096] [2021-06-05 22:38:21,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:38:21,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:21,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:38:21,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:38:21,896 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) [2021-06-05 22:38:22,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:22,753 INFO L93 Difference]: Finished difference Result 2469 states and 8641 transitions. [2021-06-05 22:38:22,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:38:22,753 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 [2021-06-05 22:38:22,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:22,757 INFO L225 Difference]: With dead ends: 2469 [2021-06-05 22:38:22,757 INFO L226 Difference]: Without dead ends: 2460 [2021-06-05 22:38:22,757 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 791.9ms TimeCoverageRelationStatistics Valid=248, Invalid=1474, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:38:22,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2021-06-05 22:38:22,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 1973. [2021-06-05 22:38:22,780 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) [2021-06-05 22:38:22,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 7115 transitions. [2021-06-05 22:38:22,783 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 7115 transitions. Word has length 24 [2021-06-05 22:38:22,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:22,783 INFO L482 AbstractCegarLoop]: Abstraction has 1973 states and 7115 transitions. [2021-06-05 22:38:22,783 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) [2021-06-05 22:38:22,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 7115 transitions. [2021-06-05 22:38:22,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:38:22,786 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:22,786 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:22,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:22,986 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:38:22,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:22,986 INFO L82 PathProgramCache]: Analyzing trace with hash -844126778, now seen corresponding path program 93 times [2021-06-05 22:38:22,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:22,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178252777] [2021-06-05 22:38:22,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:22,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:23,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:23,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:23,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178252777] [2021-06-05 22:38:23,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178252777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:23,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609513767] [2021-06-05 22:38:23,191 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 [2021-06-05 22:38:23,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:38:23,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:23,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:38:23,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:23,354 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 [2021-06-05 22:38:23,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:23,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:23,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:23,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:38:23,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:23,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609513767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:23,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:23,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:38:23,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562561331] [2021-06-05 22:38:23,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:38:23,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:23,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:38:23,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:38:23,384 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) [2021-06-05 22:38:24,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:24,450 INFO L93 Difference]: Finished difference Result 2516 states and 8793 transitions. [2021-06-05 22:38:24,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:38:24,457 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 [2021-06-05 22:38:24,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:24,461 INFO L225 Difference]: With dead ends: 2516 [2021-06-05 22:38:24,461 INFO L226 Difference]: Without dead ends: 2497 [2021-06-05 22:38:24,461 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 863.1ms TimeCoverageRelationStatistics Valid=289, Invalid=1603, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:38:24,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-06-05 22:38:24,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1976. [2021-06-05 22:38:24,485 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) [2021-06-05 22:38:24,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1976 states to 1976 states and 7125 transitions. [2021-06-05 22:38:24,488 INFO L78 Accepts]: Start accepts. Automaton has 1976 states and 7125 transitions. Word has length 24 [2021-06-05 22:38:24,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:24,488 INFO L482 AbstractCegarLoop]: Abstraction has 1976 states and 7125 transitions. [2021-06-05 22:38:24,488 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) [2021-06-05 22:38:24,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1976 states and 7125 transitions. [2021-06-05 22:38:24,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:38:24,491 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:24,491 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:24,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-06-05 22:38:24,691 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:38:24,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:24,692 INFO L82 PathProgramCache]: Analyzing trace with hash 884544968, now seen corresponding path program 94 times [2021-06-05 22:38:24,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:24,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313593390] [2021-06-05 22:38:24,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:24,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:24,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:24,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:24,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313593390] [2021-06-05 22:38:24,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313593390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:24,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990335131] [2021-06-05 22:38:24,885 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 [2021-06-05 22:38:24,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:38:24,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:24,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:38:24,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:25,048 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 [2021-06-05 22:38:25,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:25,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:25,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:25,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 22:38:25,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:25,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990335131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:25,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:25,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:38:25,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735631934] [2021-06-05 22:38:25,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:38:25,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:25,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:38:25,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:38:25,077 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) [2021-06-05 22:38:26,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:26,024 INFO L93 Difference]: Finished difference Result 2478 states and 8683 transitions. [2021-06-05 22:38:26,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:38:26,024 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 [2021-06-05 22:38:26,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:26,028 INFO L225 Difference]: With dead ends: 2478 [2021-06-05 22:38:26,028 INFO L226 Difference]: Without dead ends: 2459 [2021-06-05 22:38:26,028 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 825.2ms TimeCoverageRelationStatistics Valid=282, Invalid=1524, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:38:26,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2021-06-05 22:38:26,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 1979. [2021-06-05 22:38:26,051 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) [2021-06-05 22:38:26,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1979 states to 1979 states and 7135 transitions. [2021-06-05 22:38:26,055 INFO L78 Accepts]: Start accepts. Automaton has 1979 states and 7135 transitions. Word has length 24 [2021-06-05 22:38:26,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:26,055 INFO L482 AbstractCegarLoop]: Abstraction has 1979 states and 7135 transitions. [2021-06-05 22:38:26,055 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) [2021-06-05 22:38:26,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1979 states and 7135 transitions. [2021-06-05 22:38:26,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:38:26,057 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:26,057 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:26,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:26,261 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:38:26,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:26,261 INFO L82 PathProgramCache]: Analyzing trace with hash -143604892, now seen corresponding path program 95 times [2021-06-05 22:38:26,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:26,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511405733] [2021-06-05 22:38:26,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:26,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:26,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:26,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:26,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511405733] [2021-06-05 22:38:26,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511405733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:26,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145886695] [2021-06-05 22:38:26,442 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 [2021-06-05 22:38:26,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:38:26,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:26,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:38:26,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:26,584 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 [2021-06-05 22:38:26,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:26,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:26,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:26,588 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:38:26,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:26,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145886695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:26,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:26,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:38:26,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426609317] [2021-06-05 22:38:26,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:38:26,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:26,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:38:26,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:38:26,630 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) [2021-06-05 22:38:27,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:27,332 INFO L93 Difference]: Finished difference Result 2450 states and 8602 transitions. [2021-06-05 22:38:27,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:38:27,332 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 [2021-06-05 22:38:27,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:27,336 INFO L225 Difference]: With dead ends: 2450 [2021-06-05 22:38:27,336 INFO L226 Difference]: Without dead ends: 2441 [2021-06-05 22:38:27,337 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 653.3ms TimeCoverageRelationStatistics Valid=247, Invalid=1159, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:38:27,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2441 states. [2021-06-05 22:38:27,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2441 to 1982. [2021-06-05 22:38:27,373 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) [2021-06-05 22:38:27,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 7145 transitions. [2021-06-05 22:38:27,377 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 7145 transitions. Word has length 24 [2021-06-05 22:38:27,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:27,377 INFO L482 AbstractCegarLoop]: Abstraction has 1982 states and 7145 transitions. [2021-06-05 22:38:27,377 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) [2021-06-05 22:38:27,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 7145 transitions. [2021-06-05 22:38:27,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:38:27,380 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:27,380 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:27,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:27,580 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:38:27,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:27,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1865725408, now seen corresponding path program 96 times [2021-06-05 22:38:27,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:27,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827941513] [2021-06-05 22:38:27,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:27,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:27,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:27,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:27,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827941513] [2021-06-05 22:38:27,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827941513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:27,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133093482] [2021-06-05 22:38:27,740 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 [2021-06-05 22:38:27,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:38:27,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:27,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 22:38:27,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:27,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:38:27,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:38:27,923 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:27,924 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 [2021-06-05 22:38:27,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:27,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:27,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:38:27,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:118 [2021-06-05 22:38:28,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:28,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133093482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:28,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:28,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 22:38:28,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704386641] [2021-06-05 22:38:28,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:38:28,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:28,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:38:28,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:38:28,054 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) [2021-06-05 22:38:29,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:29,122 INFO L93 Difference]: Finished difference Result 2366 states and 8334 transitions. [2021-06-05 22:38:29,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:38:29,122 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 [2021-06-05 22:38:29,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:29,126 INFO L225 Difference]: With dead ends: 2366 [2021-06-05 22:38:29,126 INFO L226 Difference]: Without dead ends: 2353 [2021-06-05 22:38:29,126 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 928.6ms TimeCoverageRelationStatistics Valid=300, Invalid=1592, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:38:29,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2021-06-05 22:38:29,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 1974. [2021-06-05 22:38:29,147 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) [2021-06-05 22:38:29,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 7122 transitions. [2021-06-05 22:38:29,151 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 7122 transitions. Word has length 24 [2021-06-05 22:38:29,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:29,151 INFO L482 AbstractCegarLoop]: Abstraction has 1974 states and 7122 transitions. [2021-06-05 22:38:29,151 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) [2021-06-05 22:38:29,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 7122 transitions. [2021-06-05 22:38:29,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:38:29,154 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:29,154 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:29,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:29,354 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:38:29,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:29,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1334997500, now seen corresponding path program 97 times [2021-06-05 22:38:29,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:29,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751226454] [2021-06-05 22:38:29,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:29,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:29,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:29,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:29,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751226454] [2021-06-05 22:38:29,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751226454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:29,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319783217] [2021-06-05 22:38:29,524 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 [2021-06-05 22:38:29,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:29,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:38:29,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:29,662 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 [2021-06-05 22:38:29,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:29,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:29,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:29,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:38:29,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:29,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319783217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:29,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:29,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:38:29,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545197629] [2021-06-05 22:38:29,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:38:29,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:29,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:38:29,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:38:29,710 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) [2021-06-05 22:38:30,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:30,391 INFO L93 Difference]: Finished difference Result 2438 states and 8561 transitions. [2021-06-05 22:38:30,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:38:30,391 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 [2021-06-05 22:38:30,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:30,395 INFO L225 Difference]: With dead ends: 2438 [2021-06-05 22:38:30,396 INFO L226 Difference]: Without dead ends: 2429 [2021-06-05 22:38:30,396 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 637.9ms TimeCoverageRelationStatistics Valid=225, Invalid=1107, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:38:30,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2021-06-05 22:38:30,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 1963. [2021-06-05 22:38:30,430 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) [2021-06-05 22:38:30,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 7083 transitions. [2021-06-05 22:38:30,434 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 7083 transitions. Word has length 24 [2021-06-05 22:38:30,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:30,434 INFO L482 AbstractCegarLoop]: Abstraction has 1963 states and 7083 transitions. [2021-06-05 22:38:30,434 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) [2021-06-05 22:38:30,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 7083 transitions. [2021-06-05 22:38:30,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:38:30,436 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:30,437 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:30,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:30,637 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:38:30,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:30,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1948206298, now seen corresponding path program 98 times [2021-06-05 22:38:30,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:30,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046707677] [2021-06-05 22:38:30,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:30,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:30,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:30,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:30,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046707677] [2021-06-05 22:38:30,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046707677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:30,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452909625] [2021-06-05 22:38:30,810 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 [2021-06-05 22:38:30,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:38:30,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:30,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:38:30,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:31,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:38:31,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:38:31,073 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 [2021-06-05 22:38:31,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:31,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:31,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:31,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 22:38:31,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:31,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452909625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:31,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:31,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:38:31,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291126173] [2021-06-05 22:38:31,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:38:31,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:31,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:38:31,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:38:31,110 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) [2021-06-05 22:38:31,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:31,962 INFO L93 Difference]: Finished difference Result 2495 states and 8710 transitions. [2021-06-05 22:38:31,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:38:31,962 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 [2021-06-05 22:38:31,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:31,966 INFO L225 Difference]: With dead ends: 2495 [2021-06-05 22:38:31,966 INFO L226 Difference]: Without dead ends: 2486 [2021-06-05 22:38:31,966 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 734.3ms TimeCoverageRelationStatistics Valid=234, Invalid=1326, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:38:31,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2021-06-05 22:38:31,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 1963. [2021-06-05 22:38:31,997 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) [2021-06-05 22:38:32,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 7083 transitions. [2021-06-05 22:38:32,001 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 7083 transitions. Word has length 24 [2021-06-05 22:38:32,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:32,001 INFO L482 AbstractCegarLoop]: Abstraction has 1963 states and 7083 transitions. [2021-06-05 22:38:32,001 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) [2021-06-05 22:38:32,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 7083 transitions. [2021-06-05 22:38:32,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:38:32,003 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:32,003 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:32,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:32,204 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:38:32,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:32,204 INFO L82 PathProgramCache]: Analyzing trace with hash 440124240, now seen corresponding path program 99 times [2021-06-05 22:38:32,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:32,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60809284] [2021-06-05 22:38:32,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:32,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:32,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:32,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:32,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60809284] [2021-06-05 22:38:32,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60809284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:32,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585739374] [2021-06-05 22:38:32,401 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 [2021-06-05 22:38:32,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:38:32,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:32,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:38:32,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:32,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:38:32,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:38:32,623 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 [2021-06-05 22:38:32,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:32,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:32,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:32,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 22:38:32,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:32,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585739374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:32,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:32,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:38:32,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392142431] [2021-06-05 22:38:32,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:38:32,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:32,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:38:32,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:38:32,656 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) [2021-06-05 22:38:33,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:33,550 INFO L93 Difference]: Finished difference Result 2517 states and 8781 transitions. [2021-06-05 22:38:33,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:38:33,551 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 [2021-06-05 22:38:33,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:33,554 INFO L225 Difference]: With dead ends: 2517 [2021-06-05 22:38:33,554 INFO L226 Difference]: Without dead ends: 2507 [2021-06-05 22:38:33,555 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 742.6ms TimeCoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:38:33,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2021-06-05 22:38:33,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 1967. [2021-06-05 22:38:33,577 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) [2021-06-05 22:38:33,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 7095 transitions. [2021-06-05 22:38:33,580 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 7095 transitions. Word has length 24 [2021-06-05 22:38:33,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:33,580 INFO L482 AbstractCegarLoop]: Abstraction has 1967 states and 7095 transitions. [2021-06-05 22:38:33,581 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) [2021-06-05 22:38:33,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 7095 transitions. [2021-06-05 22:38:33,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:38:33,583 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:33,583 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:33,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:33,783 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:38:33,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:33,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1918599544, now seen corresponding path program 100 times [2021-06-05 22:38:33,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:33,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897305977] [2021-06-05 22:38:33,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:33,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:33,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:33,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:33,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897305977] [2021-06-05 22:38:33,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897305977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:33,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80338989] [2021-06-05 22:38:33,987 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 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 [2021-06-05 22:38:34,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:38:34,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:34,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:38:34,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:34,156 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 [2021-06-05 22:38:34,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:34,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:34,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:34,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:38:34,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:34,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80338989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:34,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:34,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:38:34,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641773100] [2021-06-05 22:38:34,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:38:34,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:34,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:38:34,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:38:34,192 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) [2021-06-05 22:38:35,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:35,030 INFO L93 Difference]: Finished difference Result 2507 states and 8780 transitions. [2021-06-05 22:38:35,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:38:35,030 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 [2021-06-05 22:38:35,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:35,034 INFO L225 Difference]: With dead ends: 2507 [2021-06-05 22:38:35,034 INFO L226 Difference]: Without dead ends: 2497 [2021-06-05 22:38:35,034 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 766.6ms TimeCoverageRelationStatistics Valid=249, Invalid=1311, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:38:35,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-06-05 22:38:35,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1966. [2021-06-05 22:38:35,064 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) [2021-06-05 22:38:35,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1966 states to 1966 states and 7095 transitions. [2021-06-05 22:38:35,067 INFO L78 Accepts]: Start accepts. Automaton has 1966 states and 7095 transitions. Word has length 24 [2021-06-05 22:38:35,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:35,068 INFO L482 AbstractCegarLoop]: Abstraction has 1966 states and 7095 transitions. [2021-06-05 22:38:35,068 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) [2021-06-05 22:38:35,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1966 states and 7095 transitions. [2021-06-05 22:38:35,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:38:35,070 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:35,070 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:35,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable374 [2021-06-05 22:38:35,270 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:38:35,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:35,271 INFO L82 PathProgramCache]: Analyzing trace with hash -2095140976, now seen corresponding path program 101 times [2021-06-05 22:38:35,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:35,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112760911] [2021-06-05 22:38:35,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:35,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:35,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:35,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:35,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112760911] [2021-06-05 22:38:35,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112760911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:35,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278288241] [2021-06-05 22:38:35,436 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 [2021-06-05 22:38:35,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:38:35,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:35,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:38:35,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:35,575 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 [2021-06-05 22:38:35,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:35,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:35,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:35,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:38:35,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:35,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278288241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:35,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:35,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:38:35,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556380415] [2021-06-05 22:38:35,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:38:35,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:35,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:38:35,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:38:35,625 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) [2021-06-05 22:38:36,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:36,537 INFO L93 Difference]: Finished difference Result 2493 states and 8734 transitions. [2021-06-05 22:38:36,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:38:36,538 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 [2021-06-05 22:38:36,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:36,541 INFO L225 Difference]: With dead ends: 2493 [2021-06-05 22:38:36,541 INFO L226 Difference]: Without dead ends: 2484 [2021-06-05 22:38:36,542 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 769.9ms TimeCoverageRelationStatistics Valid=286, Invalid=1520, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:38:36,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2021-06-05 22:38:36,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 1969. [2021-06-05 22:38:36,572 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) [2021-06-05 22:38:36,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 7103 transitions. [2021-06-05 22:38:36,576 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 7103 transitions. Word has length 24 [2021-06-05 22:38:36,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:36,576 INFO L482 AbstractCegarLoop]: Abstraction has 1969 states and 7103 transitions. [2021-06-05 22:38:36,576 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) [2021-06-05 22:38:36,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 7103 transitions. [2021-06-05 22:38:36,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:38:36,578 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:36,579 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:36,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-05 22:38:36,779 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:38:36,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:36,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1366087880, now seen corresponding path program 102 times [2021-06-05 22:38:36,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:36,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741253131] [2021-06-05 22:38:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:36,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:36,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:36,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:36,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741253131] [2021-06-05 22:38:36,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741253131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:36,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066821401] [2021-06-05 22:38:36,946 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 [2021-06-05 22:38:36,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:38:36,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:36,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:38:36,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:37,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:37,120 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:38:37,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:37,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:37,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:37,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:38:37,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:37,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066821401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:37,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:37,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:38:37,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442795225] [2021-06-05 22:38:37,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:38:37,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:37,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:38:37,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:38:37,226 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) [2021-06-05 22:38:38,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:38,478 INFO L93 Difference]: Finished difference Result 2601 states and 8996 transitions. [2021-06-05 22:38:38,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:38:38,478 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 [2021-06-05 22:38:38,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:38,482 INFO L225 Difference]: With dead ends: 2601 [2021-06-05 22:38:38,482 INFO L226 Difference]: Without dead ends: 2582 [2021-06-05 22:38:38,482 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1130.5ms TimeCoverageRelationStatistics Valid=378, Invalid=1974, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 22:38:38,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2582 states. [2021-06-05 22:38:38,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2582 to 1974. [2021-06-05 22:38:38,505 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) [2021-06-05 22:38:38,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 7126 transitions. [2021-06-05 22:38:38,509 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 7126 transitions. Word has length 24 [2021-06-05 22:38:38,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:38,509 INFO L482 AbstractCegarLoop]: Abstraction has 1974 states and 7126 transitions. [2021-06-05 22:38:38,509 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) [2021-06-05 22:38:38,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 7126 transitions. [2021-06-05 22:38:38,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:38:38,511 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:38,511 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:38,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-05 22:38:38,712 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:38:38,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:38,712 INFO L82 PathProgramCache]: Analyzing trace with hash -2147045616, now seen corresponding path program 103 times [2021-06-05 22:38:38,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:38,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394822018] [2021-06-05 22:38:38,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:38,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:38,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:38,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:38,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394822018] [2021-06-05 22:38:38,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394822018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:38,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139328078] [2021-06-05 22:38:38,864 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 [2021-06-05 22:38:38,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:38,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:38:38,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:38,999 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 [2021-06-05 22:38:39,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:39,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:39,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:39,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:38:39,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:39,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139328078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:39,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:39,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:38:39,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642323568] [2021-06-05 22:38:39,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:38:39,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:39,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:38:39,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:38:39,044 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) [2021-06-05 22:38:39,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:39,826 INFO L93 Difference]: Finished difference Result 2447 states and 8580 transitions. [2021-06-05 22:38:39,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:38:39,827 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 [2021-06-05 22:38:39,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:39,830 INFO L225 Difference]: With dead ends: 2447 [2021-06-05 22:38:39,830 INFO L226 Difference]: Without dead ends: 2437 [2021-06-05 22:38:39,830 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 715.3ms TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:38:39,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2437 states. [2021-06-05 22:38:39,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2437 to 1970. [2021-06-05 22:38:39,852 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) [2021-06-05 22:38:39,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1970 states to 1970 states and 7113 transitions. [2021-06-05 22:38:39,855 INFO L78 Accepts]: Start accepts. Automaton has 1970 states and 7113 transitions. Word has length 24 [2021-06-05 22:38:39,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:39,855 INFO L482 AbstractCegarLoop]: Abstraction has 1970 states and 7113 transitions. [2021-06-05 22:38:39,855 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) [2021-06-05 22:38:39,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1970 states and 7113 transitions. [2021-06-05 22:38:39,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:38:39,858 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:39,858 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:40,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2021-06-05 22:38:40,058 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:38:40,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:40,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1479020142, now seen corresponding path program 104 times [2021-06-05 22:38:40,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:40,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848898171] [2021-06-05 22:38:40,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:40,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:40,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:40,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848898171] [2021-06-05 22:38:40,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848898171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:40,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889748194] [2021-06-05 22:38:40,262 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 [2021-06-05 22:38:40,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:38:40,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:40,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:38:40,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:40,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:40,443 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 [2021-06-05 22:38:40,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:40,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:40,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:40,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 22:38:40,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:40,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889748194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:40,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:40,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:38:40,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371780312] [2021-06-05 22:38:40,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:38:40,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:40,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:38:40,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:38:40,513 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) [2021-06-05 22:38:41,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:41,996 INFO L93 Difference]: Finished difference Result 2518 states and 8787 transitions. [2021-06-05 22:38:41,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:38:41,996 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 [2021-06-05 22:38:41,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:41,999 INFO L225 Difference]: With dead ends: 2518 [2021-06-05 22:38:41,999 INFO L226 Difference]: Without dead ends: 2499 [2021-06-05 22:38:42,000 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1354.6ms TimeCoverageRelationStatistics Valid=434, Invalid=2116, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:38:42,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2499 states. [2021-06-05 22:38:42,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2499 to 1974. [2021-06-05 22:38:42,022 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) [2021-06-05 22:38:42,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 7127 transitions. [2021-06-05 22:38:42,025 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 7127 transitions. Word has length 24 [2021-06-05 22:38:42,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:42,025 INFO L482 AbstractCegarLoop]: Abstraction has 1974 states and 7127 transitions. [2021-06-05 22:38:42,025 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) [2021-06-05 22:38:42,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 7127 transitions. [2021-06-05 22:38:42,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:38:42,027 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:42,028 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:42,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:42,233 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:38:42,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:42,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1787797294, now seen corresponding path program 105 times [2021-06-05 22:38:42,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:42,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498339527] [2021-06-05 22:38:42,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:42,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:42,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:42,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:42,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498339527] [2021-06-05 22:38:42,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498339527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:42,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576443854] [2021-06-05 22:38:42,392 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 [2021-06-05 22:38:42,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:38:42,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:42,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:38:42,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:42,543 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:42,543 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 [2021-06-05 22:38:42,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:42,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:42,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:42,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:38:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:42,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576443854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:42,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:42,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:38:42,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210285069] [2021-06-05 22:38:42,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:38:42,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:42,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:38:42,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:38:42,653 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) [2021-06-05 22:38:43,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:43,782 INFO L93 Difference]: Finished difference Result 2444 states and 8570 transitions. [2021-06-05 22:38:43,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:38:43,783 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 [2021-06-05 22:38:43,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:43,787 INFO L225 Difference]: With dead ends: 2444 [2021-06-05 22:38:43,787 INFO L226 Difference]: Without dead ends: 2425 [2021-06-05 22:38:43,787 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1029.4ms TimeCoverageRelationStatistics Valid=384, Invalid=1686, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:38:43,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2021-06-05 22:38:43,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1979. [2021-06-05 22:38:43,811 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) [2021-06-05 22:38:43,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1979 states to 1979 states and 7145 transitions. [2021-06-05 22:38:43,814 INFO L78 Accepts]: Start accepts. Automaton has 1979 states and 7145 transitions. Word has length 24 [2021-06-05 22:38:43,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:43,815 INFO L482 AbstractCegarLoop]: Abstraction has 1979 states and 7145 transitions. [2021-06-05 22:38:43,815 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) [2021-06-05 22:38:43,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1979 states and 7145 transitions. [2021-06-05 22:38:43,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:38:43,817 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:43,817 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:44,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:44,018 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:38:44,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:44,018 INFO L82 PathProgramCache]: Analyzing trace with hash 2111383472, now seen corresponding path program 106 times [2021-06-05 22:38:44,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:44,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053261450] [2021-06-05 22:38:44,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:44,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:44,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:44,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:44,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053261450] [2021-06-05 22:38:44,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053261450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:44,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020409591] [2021-06-05 22:38:44,184 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 [2021-06-05 22:38:44,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:38:44,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:44,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:38:44,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:44,323 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 [2021-06-05 22:38:44,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:44,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:44,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:44,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:38:44,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:44,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020409591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:44,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:44,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:38:44,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127231666] [2021-06-05 22:38:44,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:38:44,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:44,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:38:44,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:38:44,370 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) [2021-06-05 22:38:45,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:45,053 INFO L93 Difference]: Finished difference Result 2401 states and 8472 transitions. [2021-06-05 22:38:45,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:38:45,053 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 [2021-06-05 22:38:45,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:45,057 INFO L225 Difference]: With dead ends: 2401 [2021-06-05 22:38:45,057 INFO L226 Difference]: Without dead ends: 2388 [2021-06-05 22:38:45,057 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 661.8ms TimeCoverageRelationStatistics Valid=231, Invalid=1101, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:38:45,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2388 states. [2021-06-05 22:38:45,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2388 to 1974. [2021-06-05 22:38:45,081 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) [2021-06-05 22:38:45,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 7127 transitions. [2021-06-05 22:38:45,085 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 7127 transitions. Word has length 24 [2021-06-05 22:38:45,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:45,085 INFO L482 AbstractCegarLoop]: Abstraction has 1974 states and 7127 transitions. [2021-06-05 22:38:45,085 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) [2021-06-05 22:38:45,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 7127 transitions. [2021-06-05 22:38:45,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:38:45,087 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:45,087 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:45,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable386,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:45,288 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:38:45,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:45,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1365890042, now seen corresponding path program 107 times [2021-06-05 22:38:45,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:45,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938260759] [2021-06-05 22:38:45,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:45,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:45,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:45,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:45,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938260759] [2021-06-05 22:38:45,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938260759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:45,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519800011] [2021-06-05 22:38:45,478 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 [2021-06-05 22:38:45,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:38:45,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:45,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:38:45,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:45,653 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 [2021-06-05 22:38:45,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:45,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:45,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:45,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:38:45,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:45,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519800011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:45,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:45,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:38:45,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006397312] [2021-06-05 22:38:45,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:38:45,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:45,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:38:45,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:38:45,683 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) [2021-06-05 22:38:46,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:46,705 INFO L93 Difference]: Finished difference Result 2538 states and 8840 transitions. [2021-06-05 22:38:46,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:38:46,705 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 [2021-06-05 22:38:46,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:46,710 INFO L225 Difference]: With dead ends: 2538 [2021-06-05 22:38:46,710 INFO L226 Difference]: Without dead ends: 2519 [2021-06-05 22:38:46,710 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 873.5ms TimeCoverageRelationStatistics Valid=277, Invalid=1529, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:38:46,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2519 states. [2021-06-05 22:38:46,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2519 to 1974. [2021-06-05 22:38:46,734 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) [2021-06-05 22:38:46,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 7127 transitions. [2021-06-05 22:38:46,738 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 7127 transitions. Word has length 24 [2021-06-05 22:38:46,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:46,738 INFO L482 AbstractCegarLoop]: Abstraction has 1974 states and 7127 transitions. [2021-06-05 22:38:46,738 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) [2021-06-05 22:38:46,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 7127 transitions. [2021-06-05 22:38:46,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:38:46,740 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:46,740 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:46,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-06-05 22:38:46,941 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:38:46,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:46,941 INFO L82 PathProgramCache]: Analyzing trace with hash 109929152, now seen corresponding path program 108 times [2021-06-05 22:38:46,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:46,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743211183] [2021-06-05 22:38:46,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:47,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:47,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:47,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743211183] [2021-06-05 22:38:47,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743211183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:47,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122612814] [2021-06-05 22:38:47,168 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 [2021-06-05 22:38:47,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:38:47,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:47,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:38:47,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:47,362 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 [2021-06-05 22:38:47,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:47,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:47,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:47,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:15 [2021-06-05 22:38:47,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:47,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122612814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:47,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:47,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:38:47,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401889684] [2021-06-05 22:38:47,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:38:47,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:47,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:38:47,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:38:47,417 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) [2021-06-05 22:38:47,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:47,937 INFO L93 Difference]: Finished difference Result 2514 states and 8723 transitions. [2021-06-05 22:38:47,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:38:47,937 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 [2021-06-05 22:38:47,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:47,942 INFO L225 Difference]: With dead ends: 2514 [2021-06-05 22:38:47,942 INFO L226 Difference]: Without dead ends: 2456 [2021-06-05 22:38:47,942 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 548.0ms TimeCoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:38:47,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2021-06-05 22:38:47,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 1983. [2021-06-05 22:38:47,969 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) [2021-06-05 22:38:47,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 7153 transitions. [2021-06-05 22:38:47,973 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 7153 transitions. Word has length 24 [2021-06-05 22:38:47,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:47,973 INFO L482 AbstractCegarLoop]: Abstraction has 1983 states and 7153 transitions. [2021-06-05 22:38:47,973 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) [2021-06-05 22:38:47,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 7153 transitions. [2021-06-05 22:38:47,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:38:47,976 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:47,976 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:48,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-05 22:38:48,177 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:38:48,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:48,177 INFO L82 PathProgramCache]: Analyzing trace with hash 79584234, now seen corresponding path program 109 times [2021-06-05 22:38:48,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:48,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644438106] [2021-06-05 22:38:48,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:48,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:48,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:48,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:48,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644438106] [2021-06-05 22:38:48,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644438106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:48,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53709980] [2021-06-05 22:38:48,414 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 [2021-06-05 22:38:48,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:48,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:38:48,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:48,601 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 [2021-06-05 22:38:48,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:48,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:48,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:48,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:38:48,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:48,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53709980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:48,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:48,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:38:48,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555517895] [2021-06-05 22:38:48,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:38:48,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:48,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:38:48,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:38:48,635 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) [2021-06-05 22:38:49,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:49,528 INFO L93 Difference]: Finished difference Result 2509 states and 8769 transitions. [2021-06-05 22:38:49,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:38:49,528 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 [2021-06-05 22:38:49,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:49,533 INFO L225 Difference]: With dead ends: 2509 [2021-06-05 22:38:49,533 INFO L226 Difference]: Without dead ends: 2499 [2021-06-05 22:38:49,533 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 843.0ms TimeCoverageRelationStatistics Valid=252, Invalid=1388, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:38:49,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2499 states. [2021-06-05 22:38:49,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2499 to 1984. [2021-06-05 22:38:49,558 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) [2021-06-05 22:38:49,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 7157 transitions. [2021-06-05 22:38:49,562 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 7157 transitions. Word has length 24 [2021-06-05 22:38:49,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:49,562 INFO L482 AbstractCegarLoop]: Abstraction has 1984 states and 7157 transitions. [2021-06-05 22:38:49,562 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) [2021-06-05 22:38:49,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 7157 transitions. [2021-06-05 22:38:49,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:38:49,565 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:49,565 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:49,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-05 22:38:49,779 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:38:49,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:49,779 INFO L82 PathProgramCache]: Analyzing trace with hash -96957198, now seen corresponding path program 110 times [2021-06-05 22:38:49,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:49,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002312474] [2021-06-05 22:38:49,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:49,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:49,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:49,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:49,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002312474] [2021-06-05 22:38:49,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002312474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:49,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203547846] [2021-06-05 22:38:49,962 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 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 [2021-06-05 22:38:49,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:38:49,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:49,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:38:49,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:50,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:50,120 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:38:50,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:50,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:50,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:50,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:38:50,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:50,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203547846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:50,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:50,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:38:50,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988841202] [2021-06-05 22:38:50,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:38:50,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:50,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:38:50,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:38:50,220 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) [2021-06-05 22:38:51,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:51,767 INFO L93 Difference]: Finished difference Result 2588 states and 8993 transitions. [2021-06-05 22:38:51,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 22:38:51,767 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 [2021-06-05 22:38:51,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:51,771 INFO L225 Difference]: With dead ends: 2588 [2021-06-05 22:38:51,771 INFO L226 Difference]: Without dead ends: 2569 [2021-06-05 22:38:51,771 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 1433.3ms TimeCoverageRelationStatistics Valid=508, Invalid=2462, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 22:38:51,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2021-06-05 22:38:51,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 1988. [2021-06-05 22:38:51,795 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) [2021-06-05 22:38:51,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 7174 transitions. [2021-06-05 22:38:51,799 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 7174 transitions. Word has length 24 [2021-06-05 22:38:51,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:51,799 INFO L482 AbstractCegarLoop]: Abstraction has 1988 states and 7174 transitions. [2021-06-05 22:38:51,799 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) [2021-06-05 22:38:51,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 7174 transitions. [2021-06-05 22:38:51,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:38:51,802 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:51,802 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:52,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable390 [2021-06-05 22:38:52,002 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:38:52,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:52,003 INFO L82 PathProgramCache]: Analyzing trace with hash -930695638, now seen corresponding path program 111 times [2021-06-05 22:38:52,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:52,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825816199] [2021-06-05 22:38:52,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:52,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:52,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:52,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825816199] [2021-06-05 22:38:52,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825816199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:52,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937643328] [2021-06-05 22:38:52,165 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 [2021-06-05 22:38:52,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:38:52,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:52,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:38:52,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:52,304 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 [2021-06-05 22:38:52,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:52,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:52,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:52,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:38:52,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:52,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937643328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:52,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:52,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:38:52,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043235810] [2021-06-05 22:38:52,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:38:52,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:52,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:38:52,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:38:52,354 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) [2021-06-05 22:38:53,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:53,174 INFO L93 Difference]: Finished difference Result 2469 states and 8651 transitions. [2021-06-05 22:38:53,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:38:53,174 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 [2021-06-05 22:38:53,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:53,178 INFO L225 Difference]: With dead ends: 2469 [2021-06-05 22:38:53,178 INFO L226 Difference]: Without dead ends: 2459 [2021-06-05 22:38:53,178 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 740.3ms TimeCoverageRelationStatistics Valid=260, Invalid=1462, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:38:53,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2021-06-05 22:38:53,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 1987. [2021-06-05 22:38:53,210 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) [2021-06-05 22:38:53,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 7170 transitions. [2021-06-05 22:38:53,213 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 7170 transitions. Word has length 24 [2021-06-05 22:38:53,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:53,213 INFO L482 AbstractCegarLoop]: Abstraction has 1987 states and 7170 transitions. [2021-06-05 22:38:53,213 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) [2021-06-05 22:38:53,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 7170 transitions. [2021-06-05 22:38:53,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:38:53,216 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:53,216 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:53,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:53,416 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:38:53,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:53,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1762867562, now seen corresponding path program 112 times [2021-06-05 22:38:53,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:53,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332446944] [2021-06-05 22:38:53,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:53,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:53,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:53,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:53,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332446944] [2021-06-05 22:38:53,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332446944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:53,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235603209] [2021-06-05 22:38:53,607 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 [2021-06-05 22:38:53,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:38:53,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:53,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:38:53,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:53,773 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 20 treesize of output 12 [2021-06-05 22:38:53,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:53,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:53,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:53,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:38:53,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:53,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235603209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:53,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:53,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:38:53,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243200432] [2021-06-05 22:38:53,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:38:53,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:53,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:38:53,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:38:53,802 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) [2021-06-05 22:38:54,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:54,689 INFO L93 Difference]: Finished difference Result 2492 states and 8720 transitions. [2021-06-05 22:38:54,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:38:54,689 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 [2021-06-05 22:38:54,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:54,693 INFO L225 Difference]: With dead ends: 2492 [2021-06-05 22:38:54,693 INFO L226 Difference]: Without dead ends: 2473 [2021-06-05 22:38:54,694 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 752.4ms TimeCoverageRelationStatistics Valid=247, Invalid=1313, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:38:54,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2021-06-05 22:38:54,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 1991. [2021-06-05 22:38:54,727 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) [2021-06-05 22:38:54,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 7185 transitions. [2021-06-05 22:38:54,731 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 7185 transitions. Word has length 24 [2021-06-05 22:38:54,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:54,731 INFO L482 AbstractCegarLoop]: Abstraction has 1991 states and 7185 transitions. [2021-06-05 22:38:54,731 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) [2021-06-05 22:38:54,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 7185 transitions. [2021-06-05 22:38:54,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:38:54,734 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:54,734 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:54,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable394 [2021-06-05 22:38:54,934 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:38:54,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:54,935 INFO L82 PathProgramCache]: Analyzing trace with hash 734717702, now seen corresponding path program 113 times [2021-06-05 22:38:54,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:54,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147977190] [2021-06-05 22:38:54,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:54,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:55,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:55,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147977190] [2021-06-05 22:38:55,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147977190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:55,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141027368] [2021-06-05 22:38:55,088 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 [2021-06-05 22:38:55,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:38:55,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:55,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:38:55,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:55,229 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 [2021-06-05 22:38:55,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:55,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:55,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:55,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:38:55,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:55,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141027368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:55,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:55,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:38:55,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558898298] [2021-06-05 22:38:55,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:38:55,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:55,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:38:55,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:38:55,275 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) [2021-06-05 22:38:55,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:55,947 INFO L93 Difference]: Finished difference Result 2469 states and 8673 transitions. [2021-06-05 22:38:55,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:38:55,947 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 [2021-06-05 22:38:55,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:55,951 INFO L225 Difference]: With dead ends: 2469 [2021-06-05 22:38:55,951 INFO L226 Difference]: Without dead ends: 2459 [2021-06-05 22:38:55,951 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 617.0ms TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:38:55,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2021-06-05 22:38:55,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 1994. [2021-06-05 22:38:55,975 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) [2021-06-05 22:38:55,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 7197 transitions. [2021-06-05 22:38:55,978 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 7197 transitions. Word has length 24 [2021-06-05 22:38:55,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:55,978 INFO L482 AbstractCegarLoop]: Abstraction has 1994 states and 7197 transitions. [2021-06-05 22:38:55,979 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) [2021-06-05 22:38:55,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 7197 transitions. [2021-06-05 22:38:55,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:38:55,981 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:55,981 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:56,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:56,181 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:38:56,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:56,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1058303880, now seen corresponding path program 114 times [2021-06-05 22:38:56,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:56,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192967739] [2021-06-05 22:38:56,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:56,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:56,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:56,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192967739] [2021-06-05 22:38:56,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192967739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:56,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686077441] [2021-06-05 22:38:56,349 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 [2021-06-05 22:38:56,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:38:56,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:56,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:38:56,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:56,505 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:56,505 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 [2021-06-05 22:38:56,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:56,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:56,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:56,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:38:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:56,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686077441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:56,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:56,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:38:56,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280546976] [2021-06-05 22:38:56,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:38:56,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:56,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:38:56,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:38:56,613 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) [2021-06-05 22:38:57,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:57,526 INFO L93 Difference]: Finished difference Result 2464 states and 8603 transitions. [2021-06-05 22:38:57,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:38:57,527 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 [2021-06-05 22:38:57,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:57,531 INFO L225 Difference]: With dead ends: 2464 [2021-06-05 22:38:57,531 INFO L226 Difference]: Without dead ends: 2445 [2021-06-05 22:38:57,532 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 827.5ms TimeCoverageRelationStatistics Valid=287, Invalid=1273, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:38:57,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2021-06-05 22:38:57,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 1998. [2021-06-05 22:38:57,556 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) [2021-06-05 22:38:57,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1998 states to 1998 states and 7213 transitions. [2021-06-05 22:38:57,559 INFO L78 Accepts]: Start accepts. Automaton has 1998 states and 7213 transitions. Word has length 24 [2021-06-05 22:38:57,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:57,559 INFO L482 AbstractCegarLoop]: Abstraction has 1998 states and 7213 transitions. [2021-06-05 22:38:57,559 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) [2021-06-05 22:38:57,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1998 states and 7213 transitions. [2021-06-05 22:38:57,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:38:57,562 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:57,562 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:57,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:57,763 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:38:57,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:57,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1550919294, now seen corresponding path program 115 times [2021-06-05 22:38:57,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:57,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628871580] [2021-06-05 22:38:57,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:57,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:57,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:57,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:57,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628871580] [2021-06-05 22:38:57,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628871580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:57,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13303694] [2021-06-05 22:38:57,922 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 [2021-06-05 22:38:57,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:57,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:38:57,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:58,062 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 [2021-06-05 22:38:58,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:58,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:58,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:58,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:38:58,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:58,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13303694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:58,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:58,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:38:58,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633973550] [2021-06-05 22:38:58,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:38:58,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:58,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:38:58,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:38:58,105 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) [2021-06-05 22:38:58,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:58,656 INFO L93 Difference]: Finished difference Result 2386 states and 8411 transitions. [2021-06-05 22:38:58,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:38:58,656 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 [2021-06-05 22:38:58,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:58,660 INFO L225 Difference]: With dead ends: 2386 [2021-06-05 22:38:58,660 INFO L226 Difference]: Without dead ends: 2373 [2021-06-05 22:38:58,660 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 558.2ms TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:38:58,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2021-06-05 22:38:58,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 1991. [2021-06-05 22:38:58,684 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) [2021-06-05 22:38:58,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 7185 transitions. [2021-06-05 22:38:58,687 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 7185 transitions. Word has length 24 [2021-06-05 22:38:58,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:58,688 INFO L482 AbstractCegarLoop]: Abstraction has 1991 states and 7185 transitions. [2021-06-05 22:38:58,688 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) [2021-06-05 22:38:58,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 7185 transitions. [2021-06-05 22:38:58,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:38:58,690 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:58,690 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:58,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-06-05 22:38:58,891 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:38:58,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:58,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1912653030, now seen corresponding path program 116 times [2021-06-05 22:38:58,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:58,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142302934] [2021-06-05 22:38:58,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:58,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:59,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:59,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:59,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142302934] [2021-06-05 22:38:59,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142302934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:59,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637566374] [2021-06-05 22:38:59,086 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 [2021-06-05 22:38:59,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:38:59,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:59,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 22:38:59,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:59,285 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 [2021-06-05 22:38:59,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:59,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:59,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:59,291 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:15 [2021-06-05 22:38:59,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:59,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637566374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:59,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:59,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:38:59,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034020391] [2021-06-05 22:38:59,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:38:59,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:59,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:38:59,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:38:59,338 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) [2021-06-05 22:38:59,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:59,906 INFO L93 Difference]: Finished difference Result 2486 states and 8672 transitions. [2021-06-05 22:38:59,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:38:59,907 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 [2021-06-05 22:38:59,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:59,911 INFO L225 Difference]: With dead ends: 2486 [2021-06-05 22:38:59,911 INFO L226 Difference]: Without dead ends: 2434 [2021-06-05 22:38:59,911 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 527.7ms TimeCoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:38:59,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2434 states. [2021-06-05 22:38:59,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2434 to 1995. [2021-06-05 22:38:59,935 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) [2021-06-05 22:38:59,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 7197 transitions. [2021-06-05 22:38:59,939 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 7197 transitions. Word has length 24 [2021-06-05 22:38:59,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:59,939 INFO L482 AbstractCegarLoop]: Abstraction has 1995 states and 7197 transitions. [2021-06-05 22:38:59,939 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) [2021-06-05 22:38:59,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 7197 transitions. [2021-06-05 22:38:59,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:38:59,941 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:59,941 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:00,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-05 22:39:00,142 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:39:00,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:00,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1695228144, now seen corresponding path program 117 times [2021-06-05 22:39:00,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:00,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191835544] [2021-06-05 22:39:00,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:00,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:00,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:00,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:00,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191835544] [2021-06-05 22:39:00,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191835544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:00,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571796926] [2021-06-05 22:39:00,299 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 [2021-06-05 22:39:00,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:39:00,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:00,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:39:00,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:00,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:00,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:00,459 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 [2021-06-05 22:39:00,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:00,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:00,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:00,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:46 [2021-06-05 22:39:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:00,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571796926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:00,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:00,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 22:39:00,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169144363] [2021-06-05 22:39:00,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:39:00,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:00,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:39:00,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:39:00,613 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) [2021-06-05 22:39:01,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:01,720 INFO L93 Difference]: Finished difference Result 2464 states and 8608 transitions. [2021-06-05 22:39:01,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:39:01,721 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 [2021-06-05 22:39:01,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:01,724 INFO L225 Difference]: With dead ends: 2464 [2021-06-05 22:39:01,725 INFO L226 Difference]: Without dead ends: 2445 [2021-06-05 22:39:01,725 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 974.1ms TimeCoverageRelationStatistics Valid=298, Invalid=1682, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:39:01,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2021-06-05 22:39:01,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 2002. [2021-06-05 22:39:01,748 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) [2021-06-05 22:39:01,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 7220 transitions. [2021-06-05 22:39:01,751 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 7220 transitions. Word has length 24 [2021-06-05 22:39:01,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:01,751 INFO L482 AbstractCegarLoop]: Abstraction has 2002 states and 7220 transitions. [2021-06-05 22:39:01,751 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) [2021-06-05 22:39:01,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 7220 transitions. [2021-06-05 22:39:01,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:39:01,754 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:01,754 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:01,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-06-05 22:39:01,954 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:39:01,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:01,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1766000712, now seen corresponding path program 118 times [2021-06-05 22:39:01,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:01,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667765735] [2021-06-05 22:39:01,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:02,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:02,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:02,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667765735] [2021-06-05 22:39:02,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667765735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:02,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121653206] [2021-06-05 22:39:02,108 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 [2021-06-05 22:39:02,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:39:02,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:02,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:39:02,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:02,254 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 [2021-06-05 22:39:02,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:02,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:02,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:02,258 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:39:02,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:02,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121653206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:02,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:02,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:39:02,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238059338] [2021-06-05 22:39:02,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:39:02,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:02,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:39:02,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:39:02,302 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) [2021-06-05 22:39:03,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:03,093 INFO L93 Difference]: Finished difference Result 2479 states and 8688 transitions. [2021-06-05 22:39:03,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:39:03,093 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 [2021-06-05 22:39:03,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:03,097 INFO L225 Difference]: With dead ends: 2479 [2021-06-05 22:39:03,097 INFO L226 Difference]: Without dead ends: 2466 [2021-06-05 22:39:03,097 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 705.9ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:39:03,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2466 states. [2021-06-05 22:39:03,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2466 to 2000. [2021-06-05 22:39:03,119 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) [2021-06-05 22:39:03,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 7214 transitions. [2021-06-05 22:39:03,123 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 7214 transitions. Word has length 24 [2021-06-05 22:39:03,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:03,123 INFO L482 AbstractCegarLoop]: Abstraction has 2000 states and 7214 transitions. [2021-06-05 22:39:03,123 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) [2021-06-05 22:39:03,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 7214 transitions. [2021-06-05 22:39:03,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:39:03,125 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:03,125 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:03,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:03,326 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:39:03,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:03,326 INFO L82 PathProgramCache]: Analyzing trace with hash 933375312, now seen corresponding path program 119 times [2021-06-05 22:39:03,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:03,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068871846] [2021-06-05 22:39:03,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:03,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:03,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:03,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068871846] [2021-06-05 22:39:03,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068871846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:03,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781904503] [2021-06-05 22:39:03,468 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 [2021-06-05 22:39:03,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:39:03,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:03,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:39:03,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:03,598 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 [2021-06-05 22:39:03,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:03,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:03,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:03,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:39:03,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:03,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781904503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:03,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:03,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:39:03,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658412266] [2021-06-05 22:39:03,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:39:03,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:03,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:39:03,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:39:03,669 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) [2021-06-05 22:39:04,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:04,397 INFO L93 Difference]: Finished difference Result 2408 states and 8475 transitions. [2021-06-05 22:39:04,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:39:04,398 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 [2021-06-05 22:39:04,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:04,401 INFO L225 Difference]: With dead ends: 2408 [2021-06-05 22:39:04,401 INFO L226 Difference]: Without dead ends: 2399 [2021-06-05 22:39:04,402 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 628.2ms TimeCoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:39:04,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2021-06-05 22:39:04,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2002. [2021-06-05 22:39:04,425 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) [2021-06-05 22:39:04,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 7221 transitions. [2021-06-05 22:39:04,429 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 7221 transitions. Word has length 24 [2021-06-05 22:39:04,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:04,429 INFO L482 AbstractCegarLoop]: Abstraction has 2002 states and 7221 transitions. [2021-06-05 22:39:04,429 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) [2021-06-05 22:39:04,429 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 7221 transitions. [2021-06-05 22:39:04,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:39:04,431 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:04,431 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:04,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable407 [2021-06-05 22:39:04,632 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:39:04,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:04,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1256961490, now seen corresponding path program 120 times [2021-06-05 22:39:04,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:04,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371882422] [2021-06-05 22:39:04,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:04,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:04,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:04,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:04,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371882422] [2021-06-05 22:39:04,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371882422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:04,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070261940] [2021-06-05 22:39:04,789 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 [2021-06-05 22:39:04,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:39:04,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:04,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:39:04,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:04,918 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:04,919 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 [2021-06-05 22:39:04,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:04,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:04,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:04,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 22:39:05,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:05,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070261940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:05,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:05,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:39:05,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024033015] [2021-06-05 22:39:05,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:39:05,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:05,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:39:05,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:39:05,050 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) [2021-06-05 22:39:06,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:06,163 INFO L93 Difference]: Finished difference Result 2501 states and 8707 transitions. [2021-06-05 22:39:06,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:39:06,163 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 [2021-06-05 22:39:06,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:06,167 INFO L225 Difference]: With dead ends: 2501 [2021-06-05 22:39:06,167 INFO L226 Difference]: Without dead ends: 2482 [2021-06-05 22:39:06,167 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 950.2ms TimeCoverageRelationStatistics Valid=355, Invalid=1537, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:39:06,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2482 states. [2021-06-05 22:39:06,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2482 to 2006. [2021-06-05 22:39:06,192 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) [2021-06-05 22:39:06,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 7238 transitions. [2021-06-05 22:39:06,195 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 7238 transitions. Word has length 24 [2021-06-05 22:39:06,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:06,195 INFO L482 AbstractCegarLoop]: Abstraction has 2006 states and 7238 transitions. [2021-06-05 22:39:06,195 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) [2021-06-05 22:39:06,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 7238 transitions. [2021-06-05 22:39:06,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:39:06,198 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:06,198 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:06,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:06,398 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:39:06,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:06,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1352261684, now seen corresponding path program 121 times [2021-06-05 22:39:06,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:06,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480135363] [2021-06-05 22:39:06,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:06,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:06,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:06,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480135363] [2021-06-05 22:39:06,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480135363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:06,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93887127] [2021-06-05 22:39:06,546 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 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 [2021-06-05 22:39:06,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:06,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:39:06,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:06,693 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 [2021-06-05 22:39:06,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:06,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:06,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:06,700 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:39:06,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:06,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93887127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:06,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:06,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:39:06,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377718854] [2021-06-05 22:39:06,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:39:06,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:06,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:39:06,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:39:06,764 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) [2021-06-05 22:39:07,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:07,461 INFO L93 Difference]: Finished difference Result 2370 states and 8354 transitions. [2021-06-05 22:39:07,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:39:07,462 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 [2021-06-05 22:39:07,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:07,466 INFO L225 Difference]: With dead ends: 2370 [2021-06-05 22:39:07,466 INFO L226 Difference]: Without dead ends: 2359 [2021-06-05 22:39:07,466 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 580.0ms TimeCoverageRelationStatistics Valid=181, Invalid=941, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:39:07,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2021-06-05 22:39:07,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2004. [2021-06-05 22:39:07,489 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) [2021-06-05 22:39:07,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 7229 transitions. [2021-06-05 22:39:07,492 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 7229 transitions. Word has length 24 [2021-06-05 22:39:07,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:07,492 INFO L482 AbstractCegarLoop]: Abstraction has 2004 states and 7229 transitions. [2021-06-05 22:39:07,493 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) [2021-06-05 22:39:07,493 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 7229 transitions. [2021-06-05 22:39:07,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:39:07,495 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:07,495 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:07,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-05 22:39:07,695 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:39:07,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:07,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1230452128, now seen corresponding path program 122 times [2021-06-05 22:39:07,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:07,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957321130] [2021-06-05 22:39:07,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:07,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:07,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:07,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957321130] [2021-06-05 22:39:07,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957321130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:07,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337868652] [2021-06-05 22:39:07,840 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 [2021-06-05 22:39:07,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:39:07,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:07,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:39:07,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:07,960 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 [2021-06-05 22:39:07,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:07,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:07,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:07,965 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:39:08,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:08,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337868652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:08,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:08,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:39:08,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648015265] [2021-06-05 22:39:08,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:39:08,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:08,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:39:08,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:39:08,022 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) [2021-06-05 22:39:08,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:08,878 INFO L93 Difference]: Finished difference Result 2441 states and 8576 transitions. [2021-06-05 22:39:08,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:39:08,878 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 [2021-06-05 22:39:08,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:08,882 INFO L225 Difference]: With dead ends: 2441 [2021-06-05 22:39:08,882 INFO L226 Difference]: Without dead ends: 2432 [2021-06-05 22:39:08,882 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 650.6ms TimeCoverageRelationStatistics Valid=253, Invalid=1307, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:39:08,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2021-06-05 22:39:08,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 2005. [2021-06-05 22:39:08,905 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) [2021-06-05 22:39:08,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 7233 transitions. [2021-06-05 22:39:08,908 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 7233 transitions. Word has length 24 [2021-06-05 22:39:08,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:08,908 INFO L482 AbstractCegarLoop]: Abstraction has 2005 states and 7233 transitions. [2021-06-05 22:39:08,908 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) [2021-06-05 22:39:08,908 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 7233 transitions. [2021-06-05 22:39:08,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:39:08,911 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:08,911 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:09,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-06-05 22:39:09,111 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:39:09,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:09,111 INFO L82 PathProgramCache]: Analyzing trace with hash 221424754, now seen corresponding path program 123 times [2021-06-05 22:39:09,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:09,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240816924] [2021-06-05 22:39:09,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:09,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:09,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:09,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240816924] [2021-06-05 22:39:09,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240816924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:09,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887708273] [2021-06-05 22:39:09,249 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 [2021-06-05 22:39:09,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:39:09,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:09,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 22:39:09,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:09,421 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:09,422 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 [2021-06-05 22:39:09,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:09,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:09,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:09,657 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:1840 [2021-06-05 22:39:10,138 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 58 [2021-06-05 22:39:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:10,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887708273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:10,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:10,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 22:39:10,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038569418] [2021-06-05 22:39:10,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:39:10,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:10,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:39:10,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:39:10,391 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) [2021-06-05 22:39:11,446 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-06-05 22:39:11,894 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-06-05 22:39:12,040 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-06-05 22:39:12,201 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-06-05 22:39:12,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:12,460 INFO L93 Difference]: Finished difference Result 2333 states and 8246 transitions. [2021-06-05 22:39:12,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:39:12,460 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 [2021-06-05 22:39:12,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:12,464 INFO L225 Difference]: With dead ends: 2333 [2021-06-05 22:39:12,464 INFO L226 Difference]: Without dead ends: 2323 [2021-06-05 22:39:12,464 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 2392.7ms TimeCoverageRelationStatistics Valid=326, Invalid=1930, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:39:12,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2021-06-05 22:39:12,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 2007. [2021-06-05 22:39:12,485 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) [2021-06-05 22:39:12,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2007 states to 2007 states and 7242 transitions. [2021-06-05 22:39:12,488 INFO L78 Accepts]: Start accepts. Automaton has 2007 states and 7242 transitions. Word has length 24 [2021-06-05 22:39:12,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:12,488 INFO L482 AbstractCegarLoop]: Abstraction has 2007 states and 7242 transitions. [2021-06-05 22:39:12,488 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) [2021-06-05 22:39:12,488 INFO L276 IsEmpty]: Start isEmpty. Operand 2007 states and 7242 transitions. [2021-06-05 22:39:12,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:39:12,491 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:12,491 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:12,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-06-05 22:39:12,691 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:39:12,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:12,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1940929934, now seen corresponding path program 124 times [2021-06-05 22:39:12,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:12,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113251733] [2021-06-05 22:39:12,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:12,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:12,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:12,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:12,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113251733] [2021-06-05 22:39:12,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113251733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:12,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352877590] [2021-06-05 22:39:12,832 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 [2021-06-05 22:39:12,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:39:12,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:12,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:39:12,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:12,950 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 [2021-06-05 22:39:12,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:12,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:12,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:12,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:39:13,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:13,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352877590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:13,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:13,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:39:13,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849598308] [2021-06-05 22:39:13,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:39:13,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:13,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:39:13,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:39:13,010 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) [2021-06-05 22:39:13,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:13,726 INFO L93 Difference]: Finished difference Result 2425 states and 8523 transitions. [2021-06-05 22:39:13,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:39:13,726 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 [2021-06-05 22:39:13,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:13,730 INFO L225 Difference]: With dead ends: 2425 [2021-06-05 22:39:13,730 INFO L226 Difference]: Without dead ends: 2416 [2021-06-05 22:39:13,730 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 562.9ms TimeCoverageRelationStatistics Valid=236, Invalid=1170, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:39:13,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-06-05 22:39:13,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2006. [2021-06-05 22:39:13,753 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) [2021-06-05 22:39:13,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 7238 transitions. [2021-06-05 22:39:13,756 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 7238 transitions. Word has length 24 [2021-06-05 22:39:13,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:13,757 INFO L482 AbstractCegarLoop]: Abstraction has 2006 states and 7238 transitions. [2021-06-05 22:39:13,757 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) [2021-06-05 22:39:13,757 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 7238 transitions. [2021-06-05 22:39:13,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:39:13,759 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:13,759 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:13,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable451 [2021-06-05 22:39:13,960 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:39:13,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:13,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1166480298, now seen corresponding path program 125 times [2021-06-05 22:39:13,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:13,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988404489] [2021-06-05 22:39:13,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:13,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:14,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:14,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:14,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988404489] [2021-06-05 22:39:14,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988404489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:14,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087463512] [2021-06-05 22:39:14,101 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 [2021-06-05 22:39:14,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:39:14,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:14,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:39:14,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:14,222 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 [2021-06-05 22:39:14,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:14,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:14,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:14,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:39:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:14,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087463512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:14,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:14,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:39:14,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483117163] [2021-06-05 22:39:14,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:39:14,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:14,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:39:14,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:39:14,286 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) [2021-06-05 22:39:15,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:15,017 INFO L93 Difference]: Finished difference Result 2401 states and 8458 transitions. [2021-06-05 22:39:15,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:39:15,017 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 [2021-06-05 22:39:15,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:15,021 INFO L225 Difference]: With dead ends: 2401 [2021-06-05 22:39:15,021 INFO L226 Difference]: Without dead ends: 2390 [2021-06-05 22:39:15,021 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 566.8ms TimeCoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:39:15,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2390 states. [2021-06-05 22:39:15,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2390 to 2008. [2021-06-05 22:39:15,047 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) [2021-06-05 22:39:15,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 7244 transitions. [2021-06-05 22:39:15,051 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 7244 transitions. Word has length 24 [2021-06-05 22:39:15,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:15,051 INFO L482 AbstractCegarLoop]: Abstraction has 2008 states and 7244 transitions. [2021-06-05 22:39:15,051 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) [2021-06-05 22:39:15,051 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 7244 transitions. [2021-06-05 22:39:15,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:39:15,054 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:15,054 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:15,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-06-05 22:39:15,254 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:39:15,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:15,255 INFO L82 PathProgramCache]: Analyzing trace with hash 2145894746, now seen corresponding path program 126 times [2021-06-05 22:39:15,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:15,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898457957] [2021-06-05 22:39:15,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:15,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:15,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:15,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:15,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898457957] [2021-06-05 22:39:15,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898457957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:15,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634482318] [2021-06-05 22:39:15,415 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 [2021-06-05 22:39:15,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:39:15,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:15,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:39:15,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:15,568 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:15,568 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 21 treesize of output 29 [2021-06-05 22:39:15,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:15,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:15,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:15,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 22:39:15,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:15,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634482318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:15,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:15,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:39:15,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651868198] [2021-06-05 22:39:15,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:39:15,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:15,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:39:15,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:39:15,691 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) [2021-06-05 22:39:16,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:16,846 INFO L93 Difference]: Finished difference Result 2511 states and 8723 transitions. [2021-06-05 22:39:16,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:39:16,846 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 [2021-06-05 22:39:16,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:16,850 INFO L225 Difference]: With dead ends: 2511 [2021-06-05 22:39:16,850 INFO L226 Difference]: Without dead ends: 2492 [2021-06-05 22:39:16,850 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 950.5ms TimeCoverageRelationStatistics Valid=374, Invalid=1696, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:39:16,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2021-06-05 22:39:16,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 2010. [2021-06-05 22:39:16,876 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) [2021-06-05 22:39:16,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 7253 transitions. [2021-06-05 22:39:16,880 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 7253 transitions. Word has length 24 [2021-06-05 22:39:16,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:16,880 INFO L482 AbstractCegarLoop]: Abstraction has 2010 states and 7253 transitions. [2021-06-05 22:39:16,880 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) [2021-06-05 22:39:16,880 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 7253 transitions. [2021-06-05 22:39:16,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:39:16,882 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:16,882 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:17,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-06-05 22:39:17,083 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:39:17,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:17,083 INFO L82 PathProgramCache]: Analyzing trace with hash -428282352, now seen corresponding path program 127 times [2021-06-05 22:39:17,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:17,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768518182] [2021-06-05 22:39:17,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:17,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:17,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:17,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:17,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768518182] [2021-06-05 22:39:17,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768518182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:17,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846751757] [2021-06-05 22:39:17,265 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 [2021-06-05 22:39:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:17,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:39:17,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:17,385 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 [2021-06-05 22:39:17,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:17,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:17,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:17,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:39:17,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:17,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846751757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:17,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:17,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:39:17,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120676102] [2021-06-05 22:39:17,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:39:17,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:17,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:39:17,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:39:17,446 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) [2021-06-05 22:39:18,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:18,004 INFO L93 Difference]: Finished difference Result 2354 states and 8315 transitions. [2021-06-05 22:39:18,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:39:18,004 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 [2021-06-05 22:39:18,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:18,008 INFO L225 Difference]: With dead ends: 2354 [2021-06-05 22:39:18,008 INFO L226 Difference]: Without dead ends: 2344 [2021-06-05 22:39:18,008 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 498.7ms TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:39:18,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2344 states. [2021-06-05 22:39:18,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2344 to 2008. [2021-06-05 22:39:18,032 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) [2021-06-05 22:39:18,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 7246 transitions. [2021-06-05 22:39:18,036 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 7246 transitions. Word has length 24 [2021-06-05 22:39:18,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:18,036 INFO L482 AbstractCegarLoop]: Abstraction has 2008 states and 7246 transitions. [2021-06-05 22:39:18,036 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) [2021-06-05 22:39:18,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 7246 transitions. [2021-06-05 22:39:18,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:39:18,039 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:18,039 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:18,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:18,239 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:39:18,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:18,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1107281254, now seen corresponding path program 84 times [2021-06-05 22:39:18,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:18,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307466790] [2021-06-05 22:39:18,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:18,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:18,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:18,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:18,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307466790] [2021-06-05 22:39:18,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307466790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:18,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708935585] [2021-06-05 22:39:18,425 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 [2021-06-05 22:39:18,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:39:18,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:18,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:39:18,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:18,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:18,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:18,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:18,644 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 [2021-06-05 22:39:18,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:39:18,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:18,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:18,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-06-05 22:39:18,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:18,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708935585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:18,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:18,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:39:18,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823860025] [2021-06-05 22:39:18,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:39:18,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:18,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:39:18,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:39:18,717 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) [2021-06-05 22:39:20,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:20,547 INFO L93 Difference]: Finished difference Result 2660 states and 9152 transitions. [2021-06-05 22:39:20,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 22:39:20,547 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 [2021-06-05 22:39:20,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:20,551 INFO L225 Difference]: With dead ends: 2660 [2021-06-05 22:39:20,551 INFO L226 Difference]: Without dead ends: 2590 [2021-06-05 22:39:20,552 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1395.0ms TimeCoverageRelationStatistics Valid=377, Invalid=2593, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 22:39:20,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2021-06-05 22:39:20,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 2017. [2021-06-05 22:39:20,576 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) [2021-06-05 22:39:20,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 7275 transitions. [2021-06-05 22:39:20,580 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 7275 transitions. Word has length 24 [2021-06-05 22:39:20,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:20,580 INFO L482 AbstractCegarLoop]: Abstraction has 2017 states and 7275 transitions. [2021-06-05 22:39:20,580 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) [2021-06-05 22:39:20,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 7275 transitions. [2021-06-05 22:39:20,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:39:20,583 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:20,583 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:20,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-06-05 22:39:20,783 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:39:20,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:20,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1923388560, now seen corresponding path program 85 times [2021-06-05 22:39:20,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:20,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33251292] [2021-06-05 22:39:20,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:20,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:20,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:20,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:20,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33251292] [2021-06-05 22:39:20,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33251292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:20,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002202475] [2021-06-05 22:39:20,964 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 [2021-06-05 22:39:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:20,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:39:20,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:21,144 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 [2021-06-05 22:39:21,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:21,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:21,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:21,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:39:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:21,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002202475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:21,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:21,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:39:21,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415701868] [2021-06-05 22:39:21,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:39:21,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:21,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:39:21,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:39:21,174 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) [2021-06-05 22:39:22,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:22,946 INFO L93 Difference]: Finished difference Result 2582 states and 8988 transitions. [2021-06-05 22:39:22,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 22:39:22,946 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 [2021-06-05 22:39:22,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:22,950 INFO L225 Difference]: With dead ends: 2582 [2021-06-05 22:39:22,950 INFO L226 Difference]: Without dead ends: 2540 [2021-06-05 22:39:22,950 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1397.1ms TimeCoverageRelationStatistics Valid=435, Invalid=2535, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 22:39:22,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2540 states. [2021-06-05 22:39:22,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2540 to 2020. [2021-06-05 22:39:22,972 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) [2021-06-05 22:39:22,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 7284 transitions. [2021-06-05 22:39:22,976 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 7284 transitions. Word has length 24 [2021-06-05 22:39:22,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:22,976 INFO L482 AbstractCegarLoop]: Abstraction has 2020 states and 7284 transitions. [2021-06-05 22:39:22,976 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) [2021-06-05 22:39:22,976 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 7284 transitions. [2021-06-05 22:39:22,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:39:22,978 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:22,978 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:23,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:23,189 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:39:23,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:23,189 INFO L82 PathProgramCache]: Analyzing trace with hash -2099929992, now seen corresponding path program 86 times [2021-06-05 22:39:23,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:23,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872393437] [2021-06-05 22:39:23,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:23,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:23,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:23,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:23,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872393437] [2021-06-05 22:39:23,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872393437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:23,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966613032] [2021-06-05 22:39:23,350 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 [2021-06-05 22:39:23,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:39:23,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:23,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:39:23,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:23,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:23,510 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 [2021-06-05 22:39:23,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:23,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:23,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:23,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:39:23,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:23,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966613032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:23,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:23,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:39:23,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751875845] [2021-06-05 22:39:23,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:39:23,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:23,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:39:23,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:39:23,595 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) [2021-06-05 22:39:25,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:25,358 INFO L93 Difference]: Finished difference Result 2539 states and 8854 transitions. [2021-06-05 22:39:25,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 22:39:25,358 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 [2021-06-05 22:39:25,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:25,362 INFO L225 Difference]: With dead ends: 2539 [2021-06-05 22:39:25,362 INFO L226 Difference]: Without dead ends: 2493 [2021-06-05 22:39:25,362 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1555.9ms TimeCoverageRelationStatistics Valid=513, Invalid=2909, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 22:39:25,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2021-06-05 22:39:25,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2027. [2021-06-05 22:39:25,385 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) [2021-06-05 22:39:25,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 7309 transitions. [2021-06-05 22:39:25,388 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 7309 transitions. Word has length 24 [2021-06-05 22:39:25,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:25,389 INFO L482 AbstractCegarLoop]: Abstraction has 2027 states and 7309 transitions. [2021-06-05 22:39:25,389 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) [2021-06-05 22:39:25,389 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 7309 transitions. [2021-06-05 22:39:25,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:39:25,391 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:25,391 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:25,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:25,592 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:39:25,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:25,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1361298864, now seen corresponding path program 87 times [2021-06-05 22:39:25,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:25,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40547866] [2021-06-05 22:39:25,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:25,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:25,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:25,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:25,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40547866] [2021-06-05 22:39:25,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40547866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:25,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589300487] [2021-06-05 22:39:25,760 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 [2021-06-05 22:39:25,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:39:25,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:25,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:39:25,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:25,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:25,904 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 [2021-06-05 22:39:25,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:25,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:25,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:25,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:39:26,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:26,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589300487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:26,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:26,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:39:26,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742606966] [2021-06-05 22:39:26,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:39:26,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:26,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:39:26,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:39:26,007 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) [2021-06-05 22:39:27,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:27,607 INFO L93 Difference]: Finished difference Result 2478 states and 8649 transitions. [2021-06-05 22:39:27,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:39:27,607 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 [2021-06-05 22:39:27,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:27,611 INFO L225 Difference]: With dead ends: 2478 [2021-06-05 22:39:27,611 INFO L226 Difference]: Without dead ends: 2457 [2021-06-05 22:39:27,611 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1339.7ms TimeCoverageRelationStatistics Valid=374, Invalid=2076, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:39:27,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-06-05 22:39:27,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2026. [2021-06-05 22:39:27,634 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) [2021-06-05 22:39:27,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2026 states to 2026 states and 7307 transitions. [2021-06-05 22:39:27,638 INFO L78 Accepts]: Start accepts. Automaton has 2026 states and 7307 transitions. Word has length 24 [2021-06-05 22:39:27,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:27,638 INFO L482 AbstractCegarLoop]: Abstraction has 2026 states and 7307 transitions. [2021-06-05 22:39:27,638 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) [2021-06-05 22:39:27,638 INFO L276 IsEmpty]: Start isEmpty. Operand 2026 states and 7307 transitions. [2021-06-05 22:39:27,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:39:27,640 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:27,640 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:27,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable464,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:27,841 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:39:27,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:27,841 INFO L82 PathProgramCache]: Analyzing trace with hash 2143132664, now seen corresponding path program 88 times [2021-06-05 22:39:27,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:27,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748040754] [2021-06-05 22:39:27,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:27,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:27,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748040754] [2021-06-05 22:39:27,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748040754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:27,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246470625] [2021-06-05 22:39:27,996 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 [2021-06-05 22:39:28,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:39:28,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:28,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:39:28,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:28,133 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 [2021-06-05 22:39:28,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:28,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:28,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:28,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:39:28,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:28,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246470625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:28,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:28,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:39:28,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672007987] [2021-06-05 22:39:28,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:39:28,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:28,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:39:28,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:39:28,178 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) [2021-06-05 22:39:29,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:29,270 INFO L93 Difference]: Finished difference Result 2424 states and 8516 transitions. [2021-06-05 22:39:29,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:39:29,270 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 [2021-06-05 22:39:29,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:29,274 INFO L225 Difference]: With dead ends: 2424 [2021-06-05 22:39:29,274 INFO L226 Difference]: Without dead ends: 2407 [2021-06-05 22:39:29,274 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 951.0ms TimeCoverageRelationStatistics Valid=283, Invalid=1609, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:39:29,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2021-06-05 22:39:29,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 2023. [2021-06-05 22:39:29,296 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) [2021-06-05 22:39:29,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 7298 transitions. [2021-06-05 22:39:29,300 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 7298 transitions. Word has length 24 [2021-06-05 22:39:29,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:29,300 INFO L482 AbstractCegarLoop]: Abstraction has 2023 states and 7298 transitions. [2021-06-05 22:39:29,300 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) [2021-06-05 22:39:29,300 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 7298 transitions. [2021-06-05 22:39:29,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:39:29,302 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:29,302 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:29,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:29,505 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:39:29,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:29,505 INFO L82 PathProgramCache]: Analyzing trace with hash -460321124, now seen corresponding path program 128 times [2021-06-05 22:39:29,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:29,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570335889] [2021-06-05 22:39:29,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:29,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:29,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:29,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570335889] [2021-06-05 22:39:29,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570335889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:29,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893881657] [2021-06-05 22:39:29,699 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 [2021-06-05 22:39:29,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:39:29,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:29,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:39:29,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:29,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:29,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:29,944 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 [2021-06-05 22:39:29,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:29,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:29,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:29,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 22:39:29,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:29,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893881657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:29,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:29,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:39:29,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114989156] [2021-06-05 22:39:29,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:39:29,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:29,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:39:29,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:39:29,979 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) [2021-06-05 22:39:31,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:31,599 INFO L93 Difference]: Finished difference Result 2630 states and 9090 transitions. [2021-06-05 22:39:31,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 22:39:31,599 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 [2021-06-05 22:39:31,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:31,603 INFO L225 Difference]: With dead ends: 2630 [2021-06-05 22:39:31,603 INFO L226 Difference]: Without dead ends: 2580 [2021-06-05 22:39:31,603 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1369.3ms TimeCoverageRelationStatistics Valid=397, Invalid=2359, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 22:39:31,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2580 states. [2021-06-05 22:39:31,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2580 to 2026. [2021-06-05 22:39:31,628 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) [2021-06-05 22:39:31,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2026 states to 2026 states and 7308 transitions. [2021-06-05 22:39:31,632 INFO L78 Accepts]: Start accepts. Automaton has 2026 states and 7308 transitions. Word has length 24 [2021-06-05 22:39:31,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:31,632 INFO L482 AbstractCegarLoop]: Abstraction has 2026 states and 7308 transitions. [2021-06-05 22:39:31,632 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) [2021-06-05 22:39:31,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2026 states and 7308 transitions. [2021-06-05 22:39:31,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:39:31,634 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:31,634 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:31,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-06-05 22:39:31,835 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:39:31,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:31,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1268350622, now seen corresponding path program 129 times [2021-06-05 22:39:31,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:31,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050314836] [2021-06-05 22:39:31,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:31,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:32,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:32,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:32,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050314836] [2021-06-05 22:39:32,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050314836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:32,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917202745] [2021-06-05 22:39:32,031 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 [2021-06-05 22:39:32,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:39:32,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:32,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:39:32,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:32,222 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:32,223 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 [2021-06-05 22:39:32,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:32,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:32,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:32,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 22:39:32,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:32,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917202745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:32,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:32,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:39:32,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209487721] [2021-06-05 22:39:32,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:39:32,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:32,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:39:32,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:39:32,308 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) [2021-06-05 22:39:34,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:34,772 INFO L93 Difference]: Finished difference Result 2613 states and 9074 transitions. [2021-06-05 22:39:34,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 22:39:34,772 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 [2021-06-05 22:39:34,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:34,776 INFO L225 Difference]: With dead ends: 2613 [2021-06-05 22:39:34,776 INFO L226 Difference]: Without dead ends: 2574 [2021-06-05 22:39:34,776 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 2106.4ms TimeCoverageRelationStatistics Valid=606, Invalid=3554, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 22:39:34,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2021-06-05 22:39:34,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 2029. [2021-06-05 22:39:34,801 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) [2021-06-05 22:39:34,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 7318 transitions. [2021-06-05 22:39:34,805 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 7318 transitions. Word has length 24 [2021-06-05 22:39:34,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:34,805 INFO L482 AbstractCegarLoop]: Abstraction has 2029 states and 7318 transitions. [2021-06-05 22:39:34,805 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) [2021-06-05 22:39:34,805 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 7318 transitions. [2021-06-05 22:39:34,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:39:34,807 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:34,808 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:35,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:35,008 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:39:35,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:35,008 INFO L82 PathProgramCache]: Analyzing trace with hash 240200762, now seen corresponding path program 130 times [2021-06-05 22:39:35,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:35,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455936874] [2021-06-05 22:39:35,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:35,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:35,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:35,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:35,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455936874] [2021-06-05 22:39:35,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455936874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:35,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151488056] [2021-06-05 22:39:35,174 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 [2021-06-05 22:39:35,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:39:35,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:35,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:39:35,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:35,310 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 [2021-06-05 22:39:35,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:35,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:35,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:35,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:39:35,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:35,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151488056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:35,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:35,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:39:35,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823125214] [2021-06-05 22:39:35,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:39:35,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:35,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:39:35,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:39:35,356 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) [2021-06-05 22:39:36,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:36,580 INFO L93 Difference]: Finished difference Result 2464 states and 8660 transitions. [2021-06-05 22:39:36,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:39:36,580 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 [2021-06-05 22:39:36,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:36,584 INFO L225 Difference]: With dead ends: 2464 [2021-06-05 22:39:36,584 INFO L226 Difference]: Without dead ends: 2438 [2021-06-05 22:39:36,585 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1069.4ms TimeCoverageRelationStatistics Valid=384, Invalid=1872, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:39:36,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2021-06-05 22:39:36,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 2032. [2021-06-05 22:39:36,606 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) [2021-06-05 22:39:36,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 7326 transitions. [2021-06-05 22:39:36,609 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 7326 transitions. Word has length 24 [2021-06-05 22:39:36,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:36,609 INFO L482 AbstractCegarLoop]: Abstraction has 2032 states and 7326 transitions. [2021-06-05 22:39:36,609 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) [2021-06-05 22:39:36,609 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 7326 transitions. [2021-06-05 22:39:36,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:39:36,612 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:36,612 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:36,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:36,813 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:39:36,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:36,814 INFO L82 PathProgramCache]: Analyzing trace with hash 563786940, now seen corresponding path program 131 times [2021-06-05 22:39:36,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:36,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298104929] [2021-06-05 22:39:36,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:36,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:36,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:36,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298104929] [2021-06-05 22:39:36,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298104929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:36,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651310698] [2021-06-05 22:39:36,988 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 [2021-06-05 22:39:37,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:39:37,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:37,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:39:37,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:37,124 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 [2021-06-05 22:39:37,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:37,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:37,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:37,128 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:39:37,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:37,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651310698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:37,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:37,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:39:37,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723417883] [2021-06-05 22:39:37,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:39:37,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:37,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:39:37,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:39:37,171 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) [2021-06-05 22:39:38,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:38,292 INFO L93 Difference]: Finished difference Result 2452 states and 8624 transitions. [2021-06-05 22:39:38,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:39:38,292 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 [2021-06-05 22:39:38,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:38,297 INFO L225 Difference]: With dead ends: 2452 [2021-06-05 22:39:38,297 INFO L226 Difference]: Without dead ends: 2427 [2021-06-05 22:39:38,297 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 935.9ms TimeCoverageRelationStatistics Valid=285, Invalid=1437, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:39:38,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2021-06-05 22:39:38,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 2025. [2021-06-05 22:39:38,322 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) [2021-06-05 22:39:38,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2025 states to 2025 states and 7306 transitions. [2021-06-05 22:39:38,326 INFO L78 Accepts]: Start accepts. Automaton has 2025 states and 7306 transitions. Word has length 24 [2021-06-05 22:39:38,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:38,326 INFO L482 AbstractCegarLoop]: Abstraction has 2025 states and 7306 transitions. [2021-06-05 22:39:38,326 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) [2021-06-05 22:39:38,326 INFO L276 IsEmpty]: Start isEmpty. Operand 2025 states and 7306 transitions. [2021-06-05 22:39:38,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:39:38,329 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:38,329 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:38,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable473 [2021-06-05 22:39:38,545 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:39:38,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:38,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1854959050, now seen corresponding path program 89 times [2021-06-05 22:39:38,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:38,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279821897] [2021-06-05 22:39:38,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:38,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:38,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:38,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:38,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279821897] [2021-06-05 22:39:38,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279821897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:38,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453684136] [2021-06-05 22:39:38,721 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 [2021-06-05 22:39:38,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:39:38,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:38,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:39:38,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:38,891 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 [2021-06-05 22:39:38,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:38,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:38,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:38,894 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:39:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:38,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453684136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:38,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:38,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:39:38,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335901167] [2021-06-05 22:39:38,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:39:38,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:38,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:39:38,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:39:38,920 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) [2021-06-05 22:39:41,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:41,050 INFO L93 Difference]: Finished difference Result 2892 states and 9978 transitions. [2021-06-05 22:39:41,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 22:39:41,058 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 [2021-06-05 22:39:41,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:41,063 INFO L225 Difference]: With dead ends: 2892 [2021-06-05 22:39:41,063 INFO L226 Difference]: Without dead ends: 2832 [2021-06-05 22:39:41,063 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 1719.9ms TimeCoverageRelationStatistics Valid=585, Invalid=2955, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 22:39:41,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-06-05 22:39:41,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 2045. [2021-06-05 22:39:41,086 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) [2021-06-05 22:39:41,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2045 states to 2045 states and 7371 transitions. [2021-06-05 22:39:41,091 INFO L78 Accepts]: Start accepts. Automaton has 2045 states and 7371 transitions. Word has length 24 [2021-06-05 22:39:41,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:41,091 INFO L482 AbstractCegarLoop]: Abstraction has 2045 states and 7371 transitions. [2021-06-05 22:39:41,091 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) [2021-06-05 22:39:41,091 INFO L276 IsEmpty]: Start isEmpty. Operand 2045 states and 7371 transitions. [2021-06-05 22:39:41,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:39:41,093 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:41,093 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:41,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-06-05 22:39:41,294 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:39:41,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:41,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1238645496, now seen corresponding path program 90 times [2021-06-05 22:39:41,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:41,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479549668] [2021-06-05 22:39:41,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:41,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:41,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:41,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:41,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479549668] [2021-06-05 22:39:41,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479549668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:41,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159133514] [2021-06-05 22:39:41,478 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 [2021-06-05 22:39:41,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:39:41,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:41,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:39:41,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:41,622 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:41,622 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 [2021-06-05 22:39:41,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:41,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:41,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:41,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:39:41,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:41,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159133514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:41,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:41,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:39:41,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780035116] [2021-06-05 22:39:41,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:39:41,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:41,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:39:41,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:39:41,753 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) [2021-06-05 22:39:43,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:43,947 INFO L93 Difference]: Finished difference Result 2693 states and 9333 transitions. [2021-06-05 22:39:43,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 22:39:43,948 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 [2021-06-05 22:39:43,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:43,953 INFO L225 Difference]: With dead ends: 2693 [2021-06-05 22:39:43,953 INFO L226 Difference]: Without dead ends: 2642 [2021-06-05 22:39:43,953 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 1948.9ms TimeCoverageRelationStatistics Valid=652, Invalid=3380, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 22:39:43,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-06-05 22:39:43,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 2049. [2021-06-05 22:39:43,979 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) [2021-06-05 22:39:43,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 7384 transitions. [2021-06-05 22:39:43,983 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 7384 transitions. Word has length 24 [2021-06-05 22:39:43,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:43,983 INFO L482 AbstractCegarLoop]: Abstraction has 2049 states and 7384 transitions. [2021-06-05 22:39:43,983 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) [2021-06-05 22:39:43,983 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 7384 transitions. [2021-06-05 22:39:43,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:39:43,986 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:43,986 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:44,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-06-05 22:39:44,201 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:39:44,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:44,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1797839404, now seen corresponding path program 132 times [2021-06-05 22:39:44,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:44,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291229102] [2021-06-05 22:39:44,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:44,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:44,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:44,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:44,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291229102] [2021-06-05 22:39:44,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291229102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:44,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834216995] [2021-06-05 22:39:44,391 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 [2021-06-05 22:39:44,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:39:44,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:44,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:39:44,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:44,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:44,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:44,602 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 [2021-06-05 22:39:44,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:44,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:44,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:44,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 22:39:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:44,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834216995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:44,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:44,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:39:44,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711413193] [2021-06-05 22:39:44,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:39:44,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:44,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:39:44,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:39:44,634 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) [2021-06-05 22:39:47,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:47,015 INFO L93 Difference]: Finished difference Result 2862 states and 9855 transitions. [2021-06-05 22:39:47,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 22:39:47,015 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 [2021-06-05 22:39:47,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:47,020 INFO L225 Difference]: With dead ends: 2862 [2021-06-05 22:39:47,020 INFO L226 Difference]: Without dead ends: 2804 [2021-06-05 22:39:47,020 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1298 ImplicationChecksByTransitivity, 2030.2ms TimeCoverageRelationStatistics Valid=732, Invalid=3690, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 22:39:47,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2804 states. [2021-06-05 22:39:47,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 2057. [2021-06-05 22:39:47,044 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) [2021-06-05 22:39:47,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 7414 transitions. [2021-06-05 22:39:47,048 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 7414 transitions. Word has length 24 [2021-06-05 22:39:47,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:47,048 INFO L482 AbstractCegarLoop]: Abstraction has 2057 states and 7414 transitions. [2021-06-05 22:39:47,048 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) [2021-06-05 22:39:47,048 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 7414 transitions. [2021-06-05 22:39:47,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:39:47,050 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:47,050 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:47,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable477,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:47,251 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:39:47,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:47,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1468978032, now seen corresponding path program 133 times [2021-06-05 22:39:47,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:47,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787089076] [2021-06-05 22:39:47,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:47,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:47,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:47,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787089076] [2021-06-05 22:39:47,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787089076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:47,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488572623] [2021-06-05 22:39:47,422 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 [2021-06-05 22:39:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:47,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:39:47,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:47,554 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 [2021-06-05 22:39:47,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:47,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:47,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:47,557 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:39:47,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:47,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488572623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:47,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:47,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:39:47,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744449126] [2021-06-05 22:39:47,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:39:47,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:47,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:39:47,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:39:47,598 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) [2021-06-05 22:39:49,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:49,441 INFO L93 Difference]: Finished difference Result 2726 states and 9487 transitions. [2021-06-05 22:39:49,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 22:39:49,441 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 [2021-06-05 22:39:49,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:49,446 INFO L225 Difference]: With dead ends: 2726 [2021-06-05 22:39:49,446 INFO L226 Difference]: Without dead ends: 2684 [2021-06-05 22:39:49,446 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 1538.6ms TimeCoverageRelationStatistics Valid=592, Invalid=2600, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 22:39:49,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2684 states. [2021-06-05 22:39:49,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2684 to 2061. [2021-06-05 22:39:49,477 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) [2021-06-05 22:39:49,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 7426 transitions. [2021-06-05 22:39:49,481 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 7426 transitions. Word has length 24 [2021-06-05 22:39:49,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:49,481 INFO L482 AbstractCegarLoop]: Abstraction has 2061 states and 7426 transitions. [2021-06-05 22:39:49,481 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) [2021-06-05 22:39:49,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 7426 transitions. [2021-06-05 22:39:49,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:39:49,484 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:49,484 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:49,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-05 22:39:49,685 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:39:49,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:49,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1792564210, now seen corresponding path program 134 times [2021-06-05 22:39:49,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:49,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824531631] [2021-06-05 22:39:49,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:49,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:49,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:49,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:49,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824531631] [2021-06-05 22:39:49,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824531631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:49,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541877026] [2021-06-05 22:39:49,849 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 [2021-06-05 22:39:49,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:39:49,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:49,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:39:49,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:49,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:49,990 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 [2021-06-05 22:39:49,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:50,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:50,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:50,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:39:50,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:50,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541877026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:50,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:50,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:39:50,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947415446] [2021-06-05 22:39:50,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:39:50,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:50,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:39:50,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:39:50,103 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) [2021-06-05 22:39:52,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:52,367 INFO L93 Difference]: Finished difference Result 2706 states and 9360 transitions. [2021-06-05 22:39:52,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 22:39:52,368 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 [2021-06-05 22:39:52,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:52,372 INFO L225 Difference]: With dead ends: 2706 [2021-06-05 22:39:52,372 INFO L226 Difference]: Without dead ends: 2666 [2021-06-05 22:39:52,373 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 1932.7ms TimeCoverageRelationStatistics Valid=645, Invalid=3261, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 22:39:52,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2021-06-05 22:39:52,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 2069. [2021-06-05 22:39:52,399 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) [2021-06-05 22:39:52,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 7454 transitions. [2021-06-05 22:39:52,403 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 7454 transitions. Word has length 24 [2021-06-05 22:39:52,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:52,403 INFO L482 AbstractCegarLoop]: Abstraction has 2069 states and 7454 transitions. [2021-06-05 22:39:52,403 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) [2021-06-05 22:39:52,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 7454 transitions. [2021-06-05 22:39:52,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:39:52,416 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:52,416 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:52,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:52,616 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:39:52,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:52,617 INFO L82 PathProgramCache]: Analyzing trace with hash -816658964, now seen corresponding path program 135 times [2021-06-05 22:39:52,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:52,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656358843] [2021-06-05 22:39:52,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:52,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:52,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:52,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:52,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656358843] [2021-06-05 22:39:52,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656358843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:52,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364362218] [2021-06-05 22:39:52,770 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 [2021-06-05 22:39:52,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:39:52,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:52,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:39:52,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:52,906 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 [2021-06-05 22:39:52,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:52,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:52,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:52,910 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:39:52,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:52,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364362218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:52,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:52,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:39:52,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250587653] [2021-06-05 22:39:52,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:39:52,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:52,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:39:52,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:39:52,955 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) [2021-06-05 22:39:54,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:54,428 INFO L93 Difference]: Finished difference Result 2577 states and 9029 transitions. [2021-06-05 22:39:54,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 22:39:54,428 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 [2021-06-05 22:39:54,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:54,432 INFO L225 Difference]: With dead ends: 2577 [2021-06-05 22:39:54,432 INFO L226 Difference]: Without dead ends: 2556 [2021-06-05 22:39:54,433 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1280.5ms TimeCoverageRelationStatistics Valid=449, Invalid=2101, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:39:54,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-06-05 22:39:54,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2053. [2021-06-05 22:39:54,456 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) [2021-06-05 22:39:54,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 7400 transitions. [2021-06-05 22:39:54,460 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 7400 transitions. Word has length 24 [2021-06-05 22:39:54,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:54,460 INFO L482 AbstractCegarLoop]: Abstraction has 2053 states and 7400 transitions. [2021-06-05 22:39:54,460 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) [2021-06-05 22:39:54,460 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 7400 transitions. [2021-06-05 22:39:54,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:39:54,462 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:54,462 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:54,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:54,663 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:39:54,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:54,663 INFO L82 PathProgramCache]: Analyzing trace with hash -357681178, now seen corresponding path program 91 times [2021-06-05 22:39:54,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:54,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899899040] [2021-06-05 22:39:54,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:54,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:54,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899899040] [2021-06-05 22:39:54,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899899040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:54,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847877153] [2021-06-05 22:39:54,836 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 [2021-06-05 22:39:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:54,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:39:54,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:54,964 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 [2021-06-05 22:39:54,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:54,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:54,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:54,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:39:55,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:55,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847877153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:55,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:55,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:39:55,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92027203] [2021-06-05 22:39:55,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:39:55,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:55,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:39:55,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:39:55,016 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) [2021-06-05 22:39:57,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:57,631 INFO L93 Difference]: Finished difference Result 3882 states and 12995 transitions. [2021-06-05 22:39:57,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 22:39:57,631 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 [2021-06-05 22:39:57,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:57,637 INFO L225 Difference]: With dead ends: 3882 [2021-06-05 22:39:57,638 INFO L226 Difference]: Without dead ends: 3817 [2021-06-05 22:39:57,638 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2159 ImplicationChecksByTransitivity, 2266.9ms TimeCoverageRelationStatistics Valid=1169, Invalid=4993, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 22:39:57,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3817 states. [2021-06-05 22:39:57,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3817 to 2126. [2021-06-05 22:39:57,672 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) [2021-06-05 22:39:57,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 7712 transitions. [2021-06-05 22:39:57,676 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 7712 transitions. Word has length 24 [2021-06-05 22:39:57,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:57,676 INFO L482 AbstractCegarLoop]: Abstraction has 2126 states and 7712 transitions. [2021-06-05 22:39:57,677 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) [2021-06-05 22:39:57,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 7712 transitions. [2021-06-05 22:39:57,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:39:57,679 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:57,679 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:57,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:57,880 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:39:57,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:57,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1879791260, now seen corresponding path program 136 times [2021-06-05 22:39:57,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:57,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341106250] [2021-06-05 22:39:57,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:57,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:58,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:58,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:58,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341106250] [2021-06-05 22:39:58,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341106250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:58,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631236448] [2021-06-05 22:39:58,036 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 [2021-06-05 22:39:58,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:39:58,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:58,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:39:58,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:58,166 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 [2021-06-05 22:39:58,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:58,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:58,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:58,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:39:58,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:58,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631236448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:58,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:58,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:39:58,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479396480] [2021-06-05 22:39:58,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:39:58,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:58,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:39:58,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:39:58,213 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) [2021-06-05 22:40:00,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:00,710 INFO L93 Difference]: Finished difference Result 3896 states and 13187 transitions. [2021-06-05 22:40:00,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 22:40:00,710 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 [2021-06-05 22:40:00,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:00,716 INFO L225 Difference]: With dead ends: 3896 [2021-06-05 22:40:00,716 INFO L226 Difference]: Without dead ends: 3835 [2021-06-05 22:40:00,716 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2130 ImplicationChecksByTransitivity, 2119.9ms TimeCoverageRelationStatistics Valid=1154, Invalid=5008, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 22:40:00,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3835 states. [2021-06-05 22:40:00,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3835 to 2196. [2021-06-05 22:40:00,749 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) [2021-06-05 22:40:00,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 8023 transitions. [2021-06-05 22:40:00,753 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 8023 transitions. Word has length 24 [2021-06-05 22:40:00,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:00,753 INFO L482 AbstractCegarLoop]: Abstraction has 2196 states and 8023 transitions. [2021-06-05 22:40:00,753 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) [2021-06-05 22:40:00,753 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 8023 transitions. [2021-06-05 22:40:00,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:40:00,756 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:00,756 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:00,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:00,957 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:40:00,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:00,957 INFO L82 PathProgramCache]: Analyzing trace with hash -2091589858, now seen corresponding path program 137 times [2021-06-05 22:40:00,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:00,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679114171] [2021-06-05 22:40:00,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:00,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:01,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:01,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679114171] [2021-06-05 22:40:01,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679114171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:01,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778087937] [2021-06-05 22:40:01,191 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 [2021-06-05 22:40:01,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:40:01,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:01,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:40:01,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:01,324 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 [2021-06-05 22:40:01,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:01,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:01,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:01,328 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:40:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:01,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778087937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:01,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:01,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:40:01,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715072363] [2021-06-05 22:40:01,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:40:01,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:01,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:40:01,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:40:01,374 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) [2021-06-05 22:40:03,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:03,802 INFO L93 Difference]: Finished difference Result 3701 states and 12762 transitions. [2021-06-05 22:40:03,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 22:40:03,802 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 [2021-06-05 22:40:03,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:03,808 INFO L225 Difference]: With dead ends: 3701 [2021-06-05 22:40:03,808 INFO L226 Difference]: Without dead ends: 3658 [2021-06-05 22:40:03,808 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1820 ImplicationChecksByTransitivity, 2056.8ms TimeCoverageRelationStatistics Valid=974, Invalid=4428, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 22:40:03,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3658 states. [2021-06-05 22:40:03,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3658 to 2202. [2021-06-05 22:40:03,842 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) [2021-06-05 22:40:03,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 8055 transitions. [2021-06-05 22:40:03,846 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 8055 transitions. Word has length 24 [2021-06-05 22:40:03,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:03,846 INFO L482 AbstractCegarLoop]: Abstraction has 2202 states and 8055 transitions. [2021-06-05 22:40:03,846 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) [2021-06-05 22:40:03,846 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 8055 transitions. [2021-06-05 22:40:03,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:40:03,849 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:03,849 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:04,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-06-05 22:40:04,050 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:40:04,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:04,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1554667190, now seen corresponding path program 92 times [2021-06-05 22:40:04,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:04,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978165943] [2021-06-05 22:40:04,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:04,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:04,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:04,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:04,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978165943] [2021-06-05 22:40:04,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978165943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:04,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819592656] [2021-06-05 22:40:04,239 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 [2021-06-05 22:40:04,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:40:04,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:04,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:40:04,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:04,417 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:04,418 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 22:40:04,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:04,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:04,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:04,427 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 22:40:04,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:04,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819592656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:04,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:04,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:40:04,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145423361] [2021-06-05 22:40:04,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:40:04,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:04,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:40:04,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:40:04,493 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) [2021-06-05 22:40:07,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:07,476 INFO L93 Difference]: Finished difference Result 3738 states and 12902 transitions. [2021-06-05 22:40:07,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 22:40:07,476 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 [2021-06-05 22:40:07,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:07,483 INFO L225 Difference]: With dead ends: 3738 [2021-06-05 22:40:07,483 INFO L226 Difference]: Without dead ends: 3704 [2021-06-05 22:40:07,484 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1818 ImplicationChecksByTransitivity, 2443.1ms TimeCoverageRelationStatistics Valid=931, Invalid=4619, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 22:40:07,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3704 states. [2021-06-05 22:40:07,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3704 to 2243. [2021-06-05 22:40:07,526 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) [2021-06-05 22:40:07,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2243 states to 2243 states and 8252 transitions. [2021-06-05 22:40:07,531 INFO L78 Accepts]: Start accepts. Automaton has 2243 states and 8252 transitions. Word has length 24 [2021-06-05 22:40:07,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:07,531 INFO L482 AbstractCegarLoop]: Abstraction has 2243 states and 8252 transitions. [2021-06-05 22:40:07,531 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) [2021-06-05 22:40:07,531 INFO L276 IsEmpty]: Start isEmpty. Operand 2243 states and 8252 transitions. [2021-06-05 22:40:07,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:40:07,534 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:07,534 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:07,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-06-05 22:40:07,735 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:40:07,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:07,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1759585324, now seen corresponding path program 138 times [2021-06-05 22:40:07,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:07,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75985689] [2021-06-05 22:40:07,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:07,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:07,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:07,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:07,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75985689] [2021-06-05 22:40:07,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75985689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:07,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419198629] [2021-06-05 22:40:07,902 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 [2021-06-05 22:40:07,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:40:07,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:07,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:40:07,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:08,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:08,097 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 [2021-06-05 22:40:08,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:08,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:08,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:08,107 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:27 [2021-06-05 22:40:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:08,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419198629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:08,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:08,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:40:08,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043549296] [2021-06-05 22:40:08,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:40:08,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:08,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:40:08,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:40:08,178 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) [2021-06-05 22:40:11,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:11,266 INFO L93 Difference]: Finished difference Result 3686 states and 12714 transitions. [2021-06-05 22:40:11,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 22:40:11,266 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 [2021-06-05 22:40:11,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:11,273 INFO L225 Difference]: With dead ends: 3686 [2021-06-05 22:40:11,273 INFO L226 Difference]: Without dead ends: 3656 [2021-06-05 22:40:11,273 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 2627.2ms TimeCoverageRelationStatistics Valid=1095, Invalid=5067, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 22:40:11,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3656 states. [2021-06-05 22:40:11,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3656 to 2245. [2021-06-05 22:40:11,311 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) [2021-06-05 22:40:11,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 8257 transitions. [2021-06-05 22:40:11,316 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 8257 transitions. Word has length 24 [2021-06-05 22:40:11,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:11,316 INFO L482 AbstractCegarLoop]: Abstraction has 2245 states and 8257 transitions. [2021-06-05 22:40:11,316 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) [2021-06-05 22:40:11,316 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 8257 transitions. [2021-06-05 22:40:11,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:40:11,319 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:11,319 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:11,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable488,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:11,519 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:40:11,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:11,519 INFO L82 PathProgramCache]: Analyzing trace with hash -73841202, now seen corresponding path program 139 times [2021-06-05 22:40:11,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:11,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219271694] [2021-06-05 22:40:11,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:11,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:11,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:11,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:11,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219271694] [2021-06-05 22:40:11,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219271694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:11,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892708993] [2021-06-05 22:40:11,686 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 [2021-06-05 22:40:11,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:11,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:40:11,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:11,831 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 [2021-06-05 22:40:11,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:11,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:11,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:11,833 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:40:11,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:11,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892708993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:11,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:11,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:40:11,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075386181] [2021-06-05 22:40:11,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:40:11,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:11,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:40:11,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:40:11,861 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) [2021-06-05 22:40:14,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:14,128 INFO L93 Difference]: Finished difference Result 3537 states and 12238 transitions. [2021-06-05 22:40:14,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 22:40:14,128 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 [2021-06-05 22:40:14,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:14,133 INFO L225 Difference]: With dead ends: 3537 [2021-06-05 22:40:14,133 INFO L226 Difference]: Without dead ends: 3502 [2021-06-05 22:40:14,134 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1335 ImplicationChecksByTransitivity, 1805.2ms TimeCoverageRelationStatistics Valid=777, Invalid=3383, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 22:40:14,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3502 states. [2021-06-05 22:40:14,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3502 to 2223. [2021-06-05 22:40:14,165 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) [2021-06-05 22:40:14,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 8147 transitions. [2021-06-05 22:40:14,169 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 8147 transitions. Word has length 24 [2021-06-05 22:40:14,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:14,169 INFO L482 AbstractCegarLoop]: Abstraction has 2223 states and 8147 transitions. [2021-06-05 22:40:14,170 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) [2021-06-05 22:40:14,170 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 8147 transitions. [2021-06-05 22:40:14,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:40:14,172 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:14,172 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:14,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:14,373 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:40:14,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:14,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1816560186, now seen corresponding path program 140 times [2021-06-05 22:40:14,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:14,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680751842] [2021-06-05 22:40:14,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:14,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:14,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:14,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:14,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680751842] [2021-06-05 22:40:14,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680751842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:14,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742870077] [2021-06-05 22:40:14,574 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 [2021-06-05 22:40:14,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:40:14,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:14,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:40:14,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:14,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:14,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:14,831 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 [2021-06-05 22:40:14,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:14,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:14,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:14,836 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 22:40:14,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:14,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742870077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:14,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:14,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:40:14,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171124943] [2021-06-05 22:40:14,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:40:14,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:14,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:40:14,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:40:14,869 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) [2021-06-05 22:40:15,147 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-06-05 22:40:16,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:16,125 INFO L93 Difference]: Finished difference Result 2779 states and 9798 transitions. [2021-06-05 22:40:16,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:40:16,125 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 [2021-06-05 22:40:16,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:16,129 INFO L225 Difference]: With dead ends: 2779 [2021-06-05 22:40:16,130 INFO L226 Difference]: Without dead ends: 2729 [2021-06-05 22:40:16,130 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1082.9ms TimeCoverageRelationStatistics Valid=288, Invalid=1692, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:40:16,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2021-06-05 22:40:16,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 2227. [2021-06-05 22:40:16,160 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) [2021-06-05 22:40:16,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 8160 transitions. [2021-06-05 22:40:16,164 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 8160 transitions. Word has length 24 [2021-06-05 22:40:16,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:16,164 INFO L482 AbstractCegarLoop]: Abstraction has 2227 states and 8160 transitions. [2021-06-05 22:40:16,165 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) [2021-06-05 22:40:16,165 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 8160 transitions. [2021-06-05 22:40:16,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:40:16,168 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:16,168 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:16,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:16,369 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:40:16,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:16,369 INFO L82 PathProgramCache]: Analyzing trace with hash -749735364, now seen corresponding path program 141 times [2021-06-05 22:40:16,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:16,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38066221] [2021-06-05 22:40:16,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:16,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:16,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:16,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38066221] [2021-06-05 22:40:16,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38066221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:16,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898215103] [2021-06-05 22:40:16,633 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 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 [2021-06-05 22:40:16,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:40:16,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:16,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:40:16,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:16,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:16,820 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 [2021-06-05 22:40:16,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:16,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:16,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:16,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 22:40:16,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:16,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898215103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:16,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:16,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:40:16,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214200493] [2021-06-05 22:40:16,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:40:16,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:16,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:40:16,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:40:16,890 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) [2021-06-05 22:40:17,234 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-06-05 22:40:18,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:18,884 INFO L93 Difference]: Finished difference Result 2773 states and 9806 transitions. [2021-06-05 22:40:18,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:40:18,885 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 [2021-06-05 22:40:18,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:18,889 INFO L225 Difference]: With dead ends: 2773 [2021-06-05 22:40:18,889 INFO L226 Difference]: Without dead ends: 2737 [2021-06-05 22:40:18,889 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 1706.1ms TimeCoverageRelationStatistics Valid=441, Invalid=2421, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 22:40:18,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2737 states. [2021-06-05 22:40:18,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2737 to 2230. [2021-06-05 22:40:18,916 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) [2021-06-05 22:40:18,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 8170 transitions. [2021-06-05 22:40:18,920 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 8170 transitions. Word has length 24 [2021-06-05 22:40:18,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:18,921 INFO L482 AbstractCegarLoop]: Abstraction has 2230 states and 8170 transitions. [2021-06-05 22:40:18,921 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) [2021-06-05 22:40:18,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 8170 transitions. [2021-06-05 22:40:18,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:40:18,924 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:18,924 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:19,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:19,125 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:40:19,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:19,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1777885224, now seen corresponding path program 142 times [2021-06-05 22:40:19,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:19,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340907396] [2021-06-05 22:40:19,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:19,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:19,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:19,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:19,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340907396] [2021-06-05 22:40:19,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340907396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:19,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417237959] [2021-06-05 22:40:19,307 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 [2021-06-05 22:40:19,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:40:19,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:19,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:40:19,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:19,467 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 [2021-06-05 22:40:19,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:19,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:19,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:19,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:40:19,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:19,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417237959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:19,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:19,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:40:19,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452565507] [2021-06-05 22:40:19,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:40:19,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:19,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:40:19,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:40:19,514 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) [2021-06-05 22:40:20,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:20,529 INFO L93 Difference]: Finished difference Result 2693 states and 9594 transitions. [2021-06-05 22:40:20,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:40:20,529 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 [2021-06-05 22:40:20,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:20,533 INFO L225 Difference]: With dead ends: 2693 [2021-06-05 22:40:20,534 INFO L226 Difference]: Without dead ends: 2667 [2021-06-05 22:40:20,534 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 897.4ms TimeCoverageRelationStatistics Valid=286, Invalid=1354, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:40:20,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2667 states. [2021-06-05 22:40:20,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2667 to 2235. [2021-06-05 22:40:20,561 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) [2021-06-05 22:40:20,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2235 states to 2235 states and 8185 transitions. [2021-06-05 22:40:20,566 INFO L78 Accepts]: Start accepts. Automaton has 2235 states and 8185 transitions. Word has length 24 [2021-06-05 22:40:20,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:20,566 INFO L482 AbstractCegarLoop]: Abstraction has 2235 states and 8185 transitions. [2021-06-05 22:40:20,566 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) [2021-06-05 22:40:20,566 INFO L276 IsEmpty]: Start isEmpty. Operand 2235 states and 8185 transitions. [2021-06-05 22:40:20,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:40:20,570 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:20,570 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:20,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-06-05 22:40:20,770 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:40:20,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:20,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1454299046, now seen corresponding path program 143 times [2021-06-05 22:40:20,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:20,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119208463] [2021-06-05 22:40:20,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:20,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:20,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:20,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119208463] [2021-06-05 22:40:20,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119208463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:20,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964942406] [2021-06-05 22:40:20,934 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 [2021-06-05 22:40:20,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:40:20,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:20,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:40:20,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:21,091 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 [2021-06-05 22:40:21,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:21,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:21,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:21,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:40:21,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:21,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964942406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:21,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:21,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:40:21,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806742282] [2021-06-05 22:40:21,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:40:21,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:21,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:40:21,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:40:21,138 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) [2021-06-05 22:40:22,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:22,236 INFO L93 Difference]: Finished difference Result 2644 states and 9457 transitions. [2021-06-05 22:40:22,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:40:22,236 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 [2021-06-05 22:40:22,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:22,240 INFO L225 Difference]: With dead ends: 2644 [2021-06-05 22:40:22,240 INFO L226 Difference]: Without dead ends: 2619 [2021-06-05 22:40:22,240 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 916.1ms TimeCoverageRelationStatistics Valid=271, Invalid=1369, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:40:22,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2619 states. [2021-06-05 22:40:22,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2619 to 2228. [2021-06-05 22:40:22,263 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) [2021-06-05 22:40:22,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 8165 transitions. [2021-06-05 22:40:22,267 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 8165 transitions. Word has length 24 [2021-06-05 22:40:22,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:22,267 INFO L482 AbstractCegarLoop]: Abstraction has 2228 states and 8165 transitions. [2021-06-05 22:40:22,267 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) [2021-06-05 22:40:22,267 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 8165 transitions. [2021-06-05 22:40:22,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:40:22,270 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:22,270 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:22,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-06-05 22:40:22,470 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:40:22,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:22,470 INFO L82 PathProgramCache]: Analyzing trace with hash -455428470, now seen corresponding path program 144 times [2021-06-05 22:40:22,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:22,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146389220] [2021-06-05 22:40:22,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:22,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:22,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:22,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146389220] [2021-06-05 22:40:22,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146389220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:22,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990465023] [2021-06-05 22:40:22,689 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 [2021-06-05 22:40:22,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:40:22,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:22,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:40:22,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:22,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:22,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:22,937 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 [2021-06-05 22:40:22,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:22,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:22,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:22,942 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 22:40:22,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:22,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990465023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:22,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:22,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:40:22,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23569129] [2021-06-05 22:40:22,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:40:22,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:22,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:40:22,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:40:22,972 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) [2021-06-05 22:40:23,240 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-06-05 22:40:24,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:24,073 INFO L93 Difference]: Finished difference Result 2746 states and 9710 transitions. [2021-06-05 22:40:24,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:40:24,074 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 [2021-06-05 22:40:24,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:24,078 INFO L225 Difference]: With dead ends: 2746 [2021-06-05 22:40:24,078 INFO L226 Difference]: Without dead ends: 2704 [2021-06-05 22:40:24,079 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 946.4ms TimeCoverageRelationStatistics Valid=254, Invalid=1552, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:40:24,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2021-06-05 22:40:24,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2230. [2021-06-05 22:40:24,106 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) [2021-06-05 22:40:24,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 8171 transitions. [2021-06-05 22:40:24,110 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 8171 transitions. Word has length 24 [2021-06-05 22:40:24,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:24,110 INFO L482 AbstractCegarLoop]: Abstraction has 2230 states and 8171 transitions. [2021-06-05 22:40:24,110 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) [2021-06-05 22:40:24,111 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 8171 transitions. [2021-06-05 22:40:24,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:40:24,113 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:24,113 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:24,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-06-05 22:40:24,314 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:40:24,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:24,314 INFO L82 PathProgramCache]: Analyzing trace with hash 808869012, now seen corresponding path program 145 times [2021-06-05 22:40:24,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:24,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236519382] [2021-06-05 22:40:24,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:24,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:24,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:24,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:24,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236519382] [2021-06-05 22:40:24,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236519382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:24,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863137607] [2021-06-05 22:40:24,534 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 [2021-06-05 22:40:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:24,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:40:24,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:24,706 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 [2021-06-05 22:40:24,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:24,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:24,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:24,708 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:40:24,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:24,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863137607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:24,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:24,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:40:24,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014405741] [2021-06-05 22:40:24,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:40:24,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:24,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:40:24,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:40:24,737 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) [2021-06-05 22:40:24,993 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-06-05 22:40:25,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:25,828 INFO L93 Difference]: Finished difference Result 2749 states and 9747 transitions. [2021-06-05 22:40:25,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:40:25,828 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 [2021-06-05 22:40:25,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:25,832 INFO L225 Difference]: With dead ends: 2749 [2021-06-05 22:40:25,832 INFO L226 Difference]: Without dead ends: 2723 [2021-06-05 22:40:25,833 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 959.0ms TimeCoverageRelationStatistics Valid=275, Invalid=1531, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:40:25,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2723 states. [2021-06-05 22:40:25,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2723 to 2232. [2021-06-05 22:40:25,857 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) [2021-06-05 22:40:25,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 8177 transitions. [2021-06-05 22:40:25,861 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 8177 transitions. Word has length 24 [2021-06-05 22:40:25,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:25,861 INFO L482 AbstractCegarLoop]: Abstraction has 2232 states and 8177 transitions. [2021-06-05 22:40:25,861 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) [2021-06-05 22:40:25,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 8177 transitions. [2021-06-05 22:40:25,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:40:25,863 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:25,863 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:26,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-05 22:40:26,064 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:40:26,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:26,064 INFO L82 PathProgramCache]: Analyzing trace with hash 632327580, now seen corresponding path program 146 times [2021-06-05 22:40:26,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:26,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112865052] [2021-06-05 22:40:26,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:26,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:26,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:26,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112865052] [2021-06-05 22:40:26,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112865052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:26,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90890623] [2021-06-05 22:40:26,230 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 [2021-06-05 22:40:26,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:40:26,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:26,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:40:26,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:26,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:26,406 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 [2021-06-05 22:40:26,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:26,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:26,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:26,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:40:26,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:26,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90890623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:26,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:26,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:40:26,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501792142] [2021-06-05 22:40:26,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:40:26,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:26,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:40:26,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:40:26,506 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) [2021-06-05 22:40:26,802 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-06-05 22:40:28,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:28,383 INFO L93 Difference]: Finished difference Result 2814 states and 9921 transitions. [2021-06-05 22:40:28,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 22:40:28,383 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 [2021-06-05 22:40:28,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:28,388 INFO L225 Difference]: With dead ends: 2814 [2021-06-05 22:40:28,388 INFO L226 Difference]: Without dead ends: 2778 [2021-06-05 22:40:28,388 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1509.3ms TimeCoverageRelationStatistics Valid=503, Invalid=2577, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 22:40:28,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2778 states. [2021-06-05 22:40:28,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2778 to 2233. [2021-06-05 22:40:28,418 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) [2021-06-05 22:40:28,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 8182 transitions. [2021-06-05 22:40:28,422 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 8182 transitions. Word has length 24 [2021-06-05 22:40:28,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:28,422 INFO L482 AbstractCegarLoop]: Abstraction has 2233 states and 8182 transitions. [2021-06-05 22:40:28,422 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) [2021-06-05 22:40:28,422 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 8182 transitions. [2021-06-05 22:40:28,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:40:28,425 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:28,425 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:28,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:28,634 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:40:28,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:28,634 INFO L82 PathProgramCache]: Analyzing trace with hash -201410860, now seen corresponding path program 147 times [2021-06-05 22:40:28,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:28,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018577682] [2021-06-05 22:40:28,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:28,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:28,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:28,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018577682] [2021-06-05 22:40:28,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018577682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:28,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906964761] [2021-06-05 22:40:28,822 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 [2021-06-05 22:40:28,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:40:28,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:28,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:40:28,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:28,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:28,990 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 [2021-06-05 22:40:28,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:29,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:29,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:29,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:40:29,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:29,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906964761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:29,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:29,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:40:29,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323515663] [2021-06-05 22:40:29,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:40:29,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:29,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:40:29,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:40:29,095 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) [2021-06-05 22:40:29,377 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-06-05 22:40:30,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:30,644 INFO L93 Difference]: Finished difference Result 2807 states and 9852 transitions. [2021-06-05 22:40:30,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:40:30,644 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 [2021-06-05 22:40:30,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:30,649 INFO L225 Difference]: With dead ends: 2807 [2021-06-05 22:40:30,649 INFO L226 Difference]: Without dead ends: 2779 [2021-06-05 22:40:30,649 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1369.5ms TimeCoverageRelationStatistics Valid=358, Invalid=2092, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:40:30,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2779 states. [2021-06-05 22:40:30,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2779 to 2234. [2021-06-05 22:40:30,675 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) [2021-06-05 22:40:30,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 8189 transitions. [2021-06-05 22:40:30,680 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 8189 transitions. Word has length 24 [2021-06-05 22:40:30,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:30,680 INFO L482 AbstractCegarLoop]: Abstraction has 2234 states and 8189 transitions. [2021-06-05 22:40:30,680 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) [2021-06-05 22:40:30,680 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 8189 transitions. [2021-06-05 22:40:30,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:40:30,683 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:30,683 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:30,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-06-05 22:40:30,883 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:40:30,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:30,883 INFO L82 PathProgramCache]: Analyzing trace with hash 580422940, now seen corresponding path program 148 times [2021-06-05 22:40:30,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:30,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665959155] [2021-06-05 22:40:30,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:30,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:31,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:31,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:31,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665959155] [2021-06-05 22:40:31,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665959155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:31,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633444362] [2021-06-05 22:40:31,058 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 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 [2021-06-05 22:40:31,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:40:31,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:31,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:40:31,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:31,202 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 [2021-06-05 22:40:31,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:31,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:31,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:31,206 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:40:31,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:31,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633444362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:31,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:31,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:40:31,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911100119] [2021-06-05 22:40:31,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:40:31,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:31,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:40:31,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:40:31,249 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) [2021-06-05 22:40:31,493 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-06-05 22:40:32,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:32,225 INFO L93 Difference]: Finished difference Result 2654 states and 9469 transitions. [2021-06-05 22:40:32,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:40:32,225 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 [2021-06-05 22:40:32,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:32,230 INFO L225 Difference]: With dead ends: 2654 [2021-06-05 22:40:32,230 INFO L226 Difference]: Without dead ends: 2640 [2021-06-05 22:40:32,230 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 857.0ms TimeCoverageRelationStatistics Valid=231, Invalid=1329, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:40:32,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2021-06-05 22:40:32,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 2233. [2021-06-05 22:40:32,257 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) [2021-06-05 22:40:32,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 8187 transitions. [2021-06-05 22:40:32,262 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 8187 transitions. Word has length 24 [2021-06-05 22:40:32,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:32,262 INFO L482 AbstractCegarLoop]: Abstraction has 2233 states and 8187 transitions. [2021-06-05 22:40:32,262 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) [2021-06-05 22:40:32,262 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 8187 transitions. [2021-06-05 22:40:32,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:40:32,276 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:32,276 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:32,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable506 [2021-06-05 22:40:32,476 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:40:32,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:32,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1802814956, now seen corresponding path program 149 times [2021-06-05 22:40:32,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:32,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228153039] [2021-06-05 22:40:32,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:32,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:32,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:32,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:32,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228153039] [2021-06-05 22:40:32,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228153039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:32,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903515698] [2021-06-05 22:40:32,686 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 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 [2021-06-05 22:40:32,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:40:32,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:32,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:40:32,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:32,863 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 [2021-06-05 22:40:32,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:32,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:32,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:32,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:40:32,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:32,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903515698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:32,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:32,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:40:32,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712883161] [2021-06-05 22:40:32,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:40:32,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:32,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:40:32,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:40:32,893 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) [2021-06-05 22:40:34,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:34,050 INFO L93 Difference]: Finished difference Result 2750 states and 9744 transitions. [2021-06-05 22:40:34,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:40:34,050 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 [2021-06-05 22:40:34,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:34,055 INFO L225 Difference]: With dead ends: 2750 [2021-06-05 22:40:34,055 INFO L226 Difference]: Without dead ends: 2714 [2021-06-05 22:40:34,055 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 1004.9ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:40:34,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2021-06-05 22:40:34,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 2238. [2021-06-05 22:40:34,082 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) [2021-06-05 22:40:34,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2238 states to 2238 states and 8205 transitions. [2021-06-05 22:40:34,087 INFO L78 Accepts]: Start accepts. Automaton has 2238 states and 8205 transitions. Word has length 24 [2021-06-05 22:40:34,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:34,087 INFO L482 AbstractCegarLoop]: Abstraction has 2238 states and 8205 transitions. [2021-06-05 22:40:34,087 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) [2021-06-05 22:40:34,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2238 states and 8205 transitions. [2021-06-05 22:40:34,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:40:34,090 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:34,090 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:34,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable507,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:34,291 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:40:34,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:34,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1464002480, now seen corresponding path program 150 times [2021-06-05 22:40:34,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:34,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987876076] [2021-06-05 22:40:34,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:34,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:34,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:34,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:34,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987876076] [2021-06-05 22:40:34,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987876076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:34,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127262538] [2021-06-05 22:40:34,470 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 [2021-06-05 22:40:34,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:40:34,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:34,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:40:34,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:34,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:34,648 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 [2021-06-05 22:40:34,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:34,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:34,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:34,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:40:34,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:34,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127262538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:34,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:34,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:40:34,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156968211] [2021-06-05 22:40:34,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:40:34,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:34,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:40:34,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:40:34,749 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) [2021-06-05 22:40:35,004 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-06-05 22:40:36,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:36,069 INFO L93 Difference]: Finished difference Result 2707 states and 9616 transitions. [2021-06-05 22:40:36,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:40:36,069 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 [2021-06-05 22:40:36,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:36,074 INFO L225 Difference]: With dead ends: 2707 [2021-06-05 22:40:36,074 INFO L226 Difference]: Without dead ends: 2671 [2021-06-05 22:40:36,074 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1285.8ms TimeCoverageRelationStatistics Valid=380, Invalid=1876, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:40:36,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2671 states. [2021-06-05 22:40:36,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2671 to 2243. [2021-06-05 22:40:36,103 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) [2021-06-05 22:40:36,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2243 states to 2243 states and 8220 transitions. [2021-06-05 22:40:36,108 INFO L78 Accepts]: Start accepts. Automaton has 2243 states and 8220 transitions. Word has length 24 [2021-06-05 22:40:36,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:36,108 INFO L482 AbstractCegarLoop]: Abstraction has 2243 states and 8220 transitions. [2021-06-05 22:40:36,108 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) [2021-06-05 22:40:36,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2243 states and 8220 transitions. [2021-06-05 22:40:36,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:40:36,112 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:36,112 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:36,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,266 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:36,312 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:40:36,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:36,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1787588658, now seen corresponding path program 151 times [2021-06-05 22:40:36,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:36,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836190396] [2021-06-05 22:40:36,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:36,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:36,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:36,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836190396] [2021-06-05 22:40:36,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836190396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:36,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754361962] [2021-06-05 22:40:36,479 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 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 [2021-06-05 22:40:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:36,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:40:36,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:36,619 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 [2021-06-05 22:40:36,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:36,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:36,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:36,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:40:36,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:36,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754361962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:36,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:36,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:40:36,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698724757] [2021-06-05 22:40:36,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:40:36,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:36,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:40:36,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:40:36,666 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) [2021-06-05 22:40:37,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:37,565 INFO L93 Difference]: Finished difference Result 2641 states and 9458 transitions. [2021-06-05 22:40:37,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:40:37,565 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 [2021-06-05 22:40:37,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:37,570 INFO L225 Difference]: With dead ends: 2641 [2021-06-05 22:40:37,570 INFO L226 Difference]: Without dead ends: 2616 [2021-06-05 22:40:37,570 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 784.1ms TimeCoverageRelationStatistics Valid=239, Invalid=1167, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:40:37,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-06-05 22:40:37,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 2236. [2021-06-05 22:40:37,597 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) [2021-06-05 22:40:37,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2236 states to 2236 states and 8199 transitions. [2021-06-05 22:40:37,602 INFO L78 Accepts]: Start accepts. Automaton has 2236 states and 8199 transitions. Word has length 24 [2021-06-05 22:40:37,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:37,602 INFO L482 AbstractCegarLoop]: Abstraction has 2236 states and 8199 transitions. [2021-06-05 22:40:37,602 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) [2021-06-05 22:40:37,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2236 states and 8199 transitions. [2021-06-05 22:40:37,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:40:37,605 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:37,605 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:37,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable511,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:37,805 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:40:37,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:37,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1183368252, now seen corresponding path program 152 times [2021-06-05 22:40:37,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:37,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101740604] [2021-06-05 22:40:37,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:37,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:38,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:38,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:38,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101740604] [2021-06-05 22:40:38,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101740604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:38,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751940299] [2021-06-05 22:40:38,076 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 [2021-06-05 22:40:38,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:40:38,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:38,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:40:38,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:38,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:38,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:38,308 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 [2021-06-05 22:40:38,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:38,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:38,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:38,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 22:40:38,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:38,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751940299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:38,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:38,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:40:38,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742468730] [2021-06-05 22:40:38,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:40:38,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:38,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:40:38,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:40:38,344 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) [2021-06-05 22:40:39,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:39,529 INFO L93 Difference]: Finished difference Result 2732 states and 9669 transitions. [2021-06-05 22:40:39,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:40:39,530 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 [2021-06-05 22:40:39,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:39,534 INFO L225 Difference]: With dead ends: 2732 [2021-06-05 22:40:39,534 INFO L226 Difference]: Without dead ends: 2680 [2021-06-05 22:40:39,534 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 998.3ms TimeCoverageRelationStatistics Valid=258, Invalid=1548, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:40:39,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-06-05 22:40:39,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2238. [2021-06-05 22:40:39,560 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) [2021-06-05 22:40:39,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2238 states to 2238 states and 8205 transitions. [2021-06-05 22:40:39,564 INFO L78 Accepts]: Start accepts. Automaton has 2238 states and 8205 transitions. Word has length 24 [2021-06-05 22:40:39,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:39,564 INFO L482 AbstractCegarLoop]: Abstraction has 2238 states and 8205 transitions. [2021-06-05 22:40:39,564 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) [2021-06-05 22:40:39,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2238 states and 8205 transitions. [2021-06-05 22:40:39,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:40:39,567 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:39,567 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:39,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-06-05 22:40:39,767 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:40:39,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:39,768 INFO L82 PathProgramCache]: Analyzing trace with hash -965943366, now seen corresponding path program 153 times [2021-06-05 22:40:39,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:39,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894351472] [2021-06-05 22:40:39,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:39,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:39,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:39,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:39,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894351472] [2021-06-05 22:40:39,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894351472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:39,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132267239] [2021-06-05 22:40:39,948 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 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 [2021-06-05 22:40:39,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:40:39,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:39,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:40:39,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:40,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:40,121 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 [2021-06-05 22:40:40,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:40,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:40,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:40,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:40:40,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:40,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132267239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:40,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:40,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:40:40,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514723755] [2021-06-05 22:40:40,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:40:40,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:40,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:40:40,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:40:40,214 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) [2021-06-05 22:40:40,467 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-06-05 22:40:41,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:41,347 INFO L93 Difference]: Finished difference Result 2712 states and 9639 transitions. [2021-06-05 22:40:41,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:40:41,348 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 [2021-06-05 22:40:41,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:41,352 INFO L225 Difference]: With dead ends: 2712 [2021-06-05 22:40:41,352 INFO L226 Difference]: Without dead ends: 2677 [2021-06-05 22:40:41,353 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 937.7ms TimeCoverageRelationStatistics Valid=281, Invalid=1699, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:40:41,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-05 22:40:41,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 2240. [2021-06-05 22:40:41,378 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) [2021-06-05 22:40:41,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 8212 transitions. [2021-06-05 22:40:41,382 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 8212 transitions. Word has length 24 [2021-06-05 22:40:41,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:41,382 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 8212 transitions. [2021-06-05 22:40:41,383 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) [2021-06-05 22:40:41,383 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 8212 transitions. [2021-06-05 22:40:41,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:40:41,385 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:41,385 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:41,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-06-05 22:40:41,586 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:40:41,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:41,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1799681806, now seen corresponding path program 154 times [2021-06-05 22:40:41,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:41,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844167001] [2021-06-05 22:40:41,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:41,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:41,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:41,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:41,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844167001] [2021-06-05 22:40:41,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844167001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:41,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671673067] [2021-06-05 22:40:41,759 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 [2021-06-05 22:40:41,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:40:41,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:41,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:40:41,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:41,899 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 [2021-06-05 22:40:41,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:41,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:41,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:41,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:40:41,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:41,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671673067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:41,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:41,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:40:41,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446758443] [2021-06-05 22:40:41,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:40:41,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:41,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:40:41,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:40:41,949 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) [2021-06-05 22:40:42,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:42,900 INFO L93 Difference]: Finished difference Result 2727 states and 9699 transitions. [2021-06-05 22:40:42,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:40:42,900 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 [2021-06-05 22:40:42,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:42,904 INFO L225 Difference]: With dead ends: 2727 [2021-06-05 22:40:42,905 INFO L226 Difference]: Without dead ends: 2703 [2021-06-05 22:40:42,905 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 831.5ms TimeCoverageRelationStatistics Valid=283, Invalid=1523, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:40:42,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2703 states. [2021-06-05 22:40:42,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2703 to 2237. [2021-06-05 22:40:42,938 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) [2021-06-05 22:40:42,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 8203 transitions. [2021-06-05 22:40:42,942 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 8203 transitions. Word has length 24 [2021-06-05 22:40:42,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:42,942 INFO L482 AbstractCegarLoop]: Abstraction has 2237 states and 8203 transitions. [2021-06-05 22:40:42,942 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) [2021-06-05 22:40:42,942 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 8203 transitions. [2021-06-05 22:40:42,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:40:42,945 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:42,945 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:43,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:43,145 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:40:43,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:43,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1662660090, now seen corresponding path program 155 times [2021-06-05 22:40:43,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:43,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206133422] [2021-06-05 22:40:43,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:43,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:43,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:43,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:43,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206133422] [2021-06-05 22:40:43,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206133422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:43,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372186611] [2021-06-05 22:40:43,295 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 [2021-06-05 22:40:43,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:40:43,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:43,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:40:43,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:43,430 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 [2021-06-05 22:40:43,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:43,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:43,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:43,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:40:43,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:43,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372186611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:43,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:43,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:40:43,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189721893] [2021-06-05 22:40:43,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:40:43,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:43,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:40:43,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:40:43,497 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) [2021-06-05 22:40:44,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:44,492 INFO L93 Difference]: Finished difference Result 2663 states and 9503 transitions. [2021-06-05 22:40:44,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:40:44,492 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 [2021-06-05 22:40:44,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:44,497 INFO L225 Difference]: With dead ends: 2663 [2021-06-05 22:40:44,497 INFO L226 Difference]: Without dead ends: 2637 [2021-06-05 22:40:44,497 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 825.1ms TimeCoverageRelationStatistics Valid=272, Invalid=1368, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:40:44,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2021-06-05 22:40:44,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 2241. [2021-06-05 22:40:44,524 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) [2021-06-05 22:40:44,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 8214 transitions. [2021-06-05 22:40:44,529 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 8214 transitions. Word has length 24 [2021-06-05 22:40:44,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:44,529 INFO L482 AbstractCegarLoop]: Abstraction has 2241 states and 8214 transitions. [2021-06-05 22:40:44,529 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) [2021-06-05 22:40:44,529 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 8214 transitions. [2021-06-05 22:40:44,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:40:44,532 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:44,532 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:44,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable516,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:44,745 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:40:44,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:44,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1986246268, now seen corresponding path program 156 times [2021-06-05 22:40:44,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:44,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830710486] [2021-06-05 22:40:44,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:44,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:44,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:44,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830710486] [2021-06-05 22:40:44,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830710486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:44,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439880283] [2021-06-05 22:40:44,894 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 [2021-06-05 22:40:44,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:40:44,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:44,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:40:44,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:45,036 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:45,036 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 [2021-06-05 22:40:45,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:45,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:45,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:45,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 22:40:45,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:45,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439880283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:45,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:45,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:40:45,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354474553] [2021-06-05 22:40:45,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:40:45,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:45,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:40:45,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:40:45,162 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) [2021-06-05 22:40:45,424 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2021-06-05 22:40:46,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:46,478 INFO L93 Difference]: Finished difference Result 2693 states and 9554 transitions. [2021-06-05 22:40:46,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:40:46,478 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 [2021-06-05 22:40:46,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:46,482 INFO L225 Difference]: With dead ends: 2693 [2021-06-05 22:40:46,483 INFO L226 Difference]: Without dead ends: 2665 [2021-06-05 22:40:46,483 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1156.9ms TimeCoverageRelationStatistics Valid=352, Invalid=1718, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:40:46,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2021-06-05 22:40:46,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 2248. [2021-06-05 22:40:46,510 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) [2021-06-05 22:40:46,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2248 states to 2248 states and 8236 transitions. [2021-06-05 22:40:46,514 INFO L78 Accepts]: Start accepts. Automaton has 2248 states and 8236 transitions. Word has length 24 [2021-06-05 22:40:46,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:46,514 INFO L482 AbstractCegarLoop]: Abstraction has 2248 states and 8236 transitions. [2021-06-05 22:40:46,514 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) [2021-06-05 22:40:46,514 INFO L276 IsEmpty]: Start isEmpty. Operand 2248 states and 8236 transitions. [2021-06-05 22:40:46,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:40:46,517 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:46,517 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:46,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:46,733 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:40:46,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:46,733 INFO L82 PathProgramCache]: Analyzing trace with hash -622976906, now seen corresponding path program 157 times [2021-06-05 22:40:46,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:46,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172267514] [2021-06-05 22:40:46,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:46,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:46,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:46,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172267514] [2021-06-05 22:40:46,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172267514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:46,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469078198] [2021-06-05 22:40:46,896 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 [2021-06-05 22:40:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:46,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:40:46,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:47,034 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 [2021-06-05 22:40:47,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:47,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:47,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:47,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:40:47,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:47,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469078198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:47,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:47,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:40:47,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853176150] [2021-06-05 22:40:47,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:40:47,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:47,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:40:47,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:40:47,102 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) [2021-06-05 22:40:48,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:48,039 INFO L93 Difference]: Finished difference Result 2567 states and 9221 transitions. [2021-06-05 22:40:48,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:40:48,039 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 [2021-06-05 22:40:48,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:48,044 INFO L225 Difference]: With dead ends: 2567 [2021-06-05 22:40:48,044 INFO L226 Difference]: Without dead ends: 2550 [2021-06-05 22:40:48,044 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 865.8ms TimeCoverageRelationStatistics Valid=220, Invalid=1186, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:40:48,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2550 states. [2021-06-05 22:40:48,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2550 to 2242. [2021-06-05 22:40:48,074 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) [2021-06-05 22:40:48,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 8219 transitions. [2021-06-05 22:40:48,080 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 8219 transitions. Word has length 24 [2021-06-05 22:40:48,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:48,080 INFO L482 AbstractCegarLoop]: Abstraction has 2242 states and 8219 transitions. [2021-06-05 22:40:48,080 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) [2021-06-05 22:40:48,080 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 8219 transitions. [2021-06-05 22:40:48,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:40:48,083 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:48,083 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:48,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-06-05 22:40:48,289 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:40:48,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:48,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1959736906, now seen corresponding path program 158 times [2021-06-05 22:40:48,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:48,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291587005] [2021-06-05 22:40:48,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:48,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:48,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:48,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291587005] [2021-06-05 22:40:48,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291587005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:48,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979742075] [2021-06-05 22:40:48,441 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 [2021-06-05 22:40:48,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:40:48,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:48,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:40:48,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:48,565 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 [2021-06-05 22:40:48,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:48,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:48,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:48,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:40:48,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:48,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979742075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:48,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:48,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:40:48,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870773651] [2021-06-05 22:40:48,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:40:48,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:48,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:40:48,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:40:48,627 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) [2021-06-05 22:40:49,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:49,615 INFO L93 Difference]: Finished difference Result 2691 states and 9584 transitions. [2021-06-05 22:40:49,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:40:49,615 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 [2021-06-05 22:40:49,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:49,620 INFO L225 Difference]: With dead ends: 2691 [2021-06-05 22:40:49,620 INFO L226 Difference]: Without dead ends: 2665 [2021-06-05 22:40:49,620 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 769.7ms TimeCoverageRelationStatistics Valid=278, Invalid=1444, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:40:49,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2021-06-05 22:40:49,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 2242. [2021-06-05 22:40:49,647 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) [2021-06-05 22:40:49,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 8219 transitions. [2021-06-05 22:40:49,652 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 8219 transitions. Word has length 24 [2021-06-05 22:40:49,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:49,652 INFO L482 AbstractCegarLoop]: Abstraction has 2242 states and 8219 transitions. [2021-06-05 22:40:49,652 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) [2021-06-05 22:40:49,652 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 8219 transitions. [2021-06-05 22:40:49,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:40:49,655 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:49,655 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:49,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-06-05 22:40:49,856 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:40:49,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:49,856 INFO L82 PathProgramCache]: Analyzing trace with hash 168875732, now seen corresponding path program 159 times [2021-06-05 22:40:49,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:49,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532121408] [2021-06-05 22:40:49,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:49,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:50,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:50,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:50,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532121408] [2021-06-05 22:40:50,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532121408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:50,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084995837] [2021-06-05 22:40:50,006 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 [2021-06-05 22:40:50,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:40:50,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:50,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:40:50,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:50,136 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:50,137 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 [2021-06-05 22:40:50,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:50,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:50,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:50,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 22:40:50,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:50,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084995837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:50,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:50,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:40:50,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322206189] [2021-06-05 22:40:50,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:40:50,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:50,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:40:50,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:40:50,267 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) [2021-06-05 22:40:50,503 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-06-05 22:40:51,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:51,620 INFO L93 Difference]: Finished difference Result 2763 states and 9734 transitions. [2021-06-05 22:40:51,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:40:51,620 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 [2021-06-05 22:40:51,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:51,624 INFO L225 Difference]: With dead ends: 2763 [2021-06-05 22:40:51,624 INFO L226 Difference]: Without dead ends: 2735 [2021-06-05 22:40:51,625 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 1204.2ms TimeCoverageRelationStatistics Valid=380, Invalid=2070, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:40:51,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2735 states. [2021-06-05 22:40:51,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2735 to 2242. [2021-06-05 22:40:51,650 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) [2021-06-05 22:40:51,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 8219 transitions. [2021-06-05 22:40:51,654 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 8219 transitions. Word has length 24 [2021-06-05 22:40:51,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:51,654 INFO L482 AbstractCegarLoop]: Abstraction has 2242 states and 8219 transitions. [2021-06-05 22:40:51,654 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) [2021-06-05 22:40:51,654 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 8219 transitions. [2021-06-05 22:40:51,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:40:51,657 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:51,657 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:51,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:51,857 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:40:51,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:51,857 INFO L82 PathProgramCache]: Analyzing trace with hash 950709532, now seen corresponding path program 160 times [2021-06-05 22:40:51,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:51,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530386673] [2021-06-05 22:40:51,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:52,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:52,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:52,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530386673] [2021-06-05 22:40:52,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530386673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:52,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663515084] [2021-06-05 22:40:52,015 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 [2021-06-05 22:40:52,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:40:52,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:52,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:40:52,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:52,172 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 [2021-06-05 22:40:52,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:52,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:52,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:52,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:40:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:52,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663515084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:52,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:52,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:40:52,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876917916] [2021-06-05 22:40:52,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:40:52,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:52,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:40:52,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:40:52,243 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) [2021-06-05 22:40:52,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:52,932 INFO L93 Difference]: Finished difference Result 2600 states and 9316 transitions. [2021-06-05 22:40:52,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:40:52,932 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 [2021-06-05 22:40:52,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:52,936 INFO L225 Difference]: With dead ends: 2600 [2021-06-05 22:40:52,936 INFO L226 Difference]: Without dead ends: 2586 [2021-06-05 22:40:52,936 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 661.8ms TimeCoverageRelationStatistics Valid=216, Invalid=1116, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:40:52,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2586 states. [2021-06-05 22:40:52,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2586 to 2242. [2021-06-05 22:40:52,960 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) [2021-06-05 22:40:52,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 8219 transitions. [2021-06-05 22:40:52,963 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 8219 transitions. Word has length 24 [2021-06-05 22:40:52,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:52,964 INFO L482 AbstractCegarLoop]: Abstraction has 2242 states and 8219 transitions. [2021-06-05 22:40:52,964 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) [2021-06-05 22:40:52,964 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 8219 transitions. [2021-06-05 22:40:52,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:40:52,966 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:52,966 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:53,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2021-06-05 22:40:53,167 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:40:53,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:53,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1895765076, now seen corresponding path program 161 times [2021-06-05 22:40:53,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:53,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110839219] [2021-06-05 22:40:53,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:53,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:53,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:53,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110839219] [2021-06-05 22:40:53,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110839219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:53,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570257900] [2021-06-05 22:40:53,314 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 [2021-06-05 22:40:53,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:40:53,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:53,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:40:53,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:53,435 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 [2021-06-05 22:40:53,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:53,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:53,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:53,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:40:53,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:53,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570257900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:53,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:53,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:40:53,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873121423] [2021-06-05 22:40:53,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:40:53,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:53,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:40:53,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:40:53,499 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) [2021-06-05 22:40:54,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:54,336 INFO L93 Difference]: Finished difference Result 2624 states and 9395 transitions. [2021-06-05 22:40:54,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:40:54,336 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 [2021-06-05 22:40:54,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:54,340 INFO L225 Difference]: With dead ends: 2624 [2021-06-05 22:40:54,340 INFO L226 Difference]: Without dead ends: 2601 [2021-06-05 22:40:54,341 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 742.0ms TimeCoverageRelationStatistics Valid=257, Invalid=1383, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:40:54,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-06-05 22:40:54,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2244. [2021-06-05 22:40:54,364 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) [2021-06-05 22:40:54,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 8224 transitions. [2021-06-05 22:40:54,368 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 8224 transitions. Word has length 24 [2021-06-05 22:40:54,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:54,368 INFO L482 AbstractCegarLoop]: Abstraction has 2244 states and 8224 transitions. [2021-06-05 22:40:54,368 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) [2021-06-05 22:40:54,368 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 8224 transitions. [2021-06-05 22:40:54,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:40:54,371 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:54,371 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:54,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:54,571 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:40:54,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:54,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1419787772, now seen corresponding path program 162 times [2021-06-05 22:40:54,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:54,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78022114] [2021-06-05 22:40:54,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:54,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:54,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:54,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:54,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78022114] [2021-06-05 22:40:54,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78022114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:54,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097734232] [2021-06-05 22:40:54,721 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 [2021-06-05 22:40:54,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:40:54,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:54,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:40:54,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:54,847 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 [2021-06-05 22:40:54,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:54,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:54,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:54,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:40:54,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:54,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097734232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:54,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:54,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:40:54,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024365154] [2021-06-05 22:40:54,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:40:54,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:54,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:40:54,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:40:54,912 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) [2021-06-05 22:40:55,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:55,734 INFO L93 Difference]: Finished difference Result 2641 states and 9443 transitions. [2021-06-05 22:40:55,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:40:55,735 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 [2021-06-05 22:40:55,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:55,739 INFO L225 Difference]: With dead ends: 2641 [2021-06-05 22:40:55,739 INFO L226 Difference]: Without dead ends: 2619 [2021-06-05 22:40:55,739 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 700.0ms TimeCoverageRelationStatistics Valid=263, Invalid=1377, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:40:55,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2619 states. [2021-06-05 22:40:55,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2619 to 2243. [2021-06-05 22:40:55,765 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) [2021-06-05 22:40:55,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2243 states to 2243 states and 8222 transitions. [2021-06-05 22:40:55,769 INFO L78 Accepts]: Start accepts. Automaton has 2243 states and 8222 transitions. Word has length 24 [2021-06-05 22:40:55,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:55,769 INFO L482 AbstractCegarLoop]: Abstraction has 2243 states and 8222 transitions. [2021-06-05 22:40:55,769 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) [2021-06-05 22:40:55,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2243 states and 8222 transitions. [2021-06-05 22:40:55,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:40:55,772 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:55,772 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:55,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable527 [2021-06-05 22:40:55,972 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:40:55,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:55,972 INFO L82 PathProgramCache]: Analyzing trace with hash 613259036, now seen corresponding path program 93 times [2021-06-05 22:40:55,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:55,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338562921] [2021-06-05 22:40:55,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:55,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:56,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:56,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:56,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338562921] [2021-06-05 22:40:56,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338562921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:56,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8125953] [2021-06-05 22:40:56,154 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 [2021-06-05 22:40:56,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:40:56,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:56,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:40:56,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:56,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:56,324 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 [2021-06-05 22:40:56,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:56,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:56,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:56,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 22:40:56,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:56,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8125953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:56,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:56,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:40:56,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142850863] [2021-06-05 22:40:56,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:40:56,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:56,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:40:56,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:40:56,400 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) [2021-06-05 22:40:56,977 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-06-05 22:40:59,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:59,046 INFO L93 Difference]: Finished difference Result 3179 states and 11053 transitions. [2021-06-05 22:40:59,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 22:40:59,046 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 [2021-06-05 22:40:59,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:59,051 INFO L225 Difference]: With dead ends: 3179 [2021-06-05 22:40:59,051 INFO L226 Difference]: Without dead ends: 3088 [2021-06-05 22:40:59,052 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 2251.4ms TimeCoverageRelationStatistics Valid=685, Invalid=4007, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 22:40:59,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3088 states. [2021-06-05 22:40:59,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3088 to 2264. [2021-06-05 22:40:59,078 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) [2021-06-05 22:40:59,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2264 states to 2264 states and 8292 transitions. [2021-06-05 22:40:59,082 INFO L78 Accepts]: Start accepts. Automaton has 2264 states and 8292 transitions. Word has length 24 [2021-06-05 22:40:59,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:59,082 INFO L482 AbstractCegarLoop]: Abstraction has 2264 states and 8292 transitions. [2021-06-05 22:40:59,082 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) [2021-06-05 22:40:59,082 INFO L276 IsEmpty]: Start isEmpty. Operand 2264 states and 8292 transitions. [2021-06-05 22:40:59,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:40:59,085 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:59,085 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:59,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable528,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:59,285 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:40:59,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:59,286 INFO L82 PathProgramCache]: Analyzing trace with hash 830683922, now seen corresponding path program 94 times [2021-06-05 22:40:59,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:59,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739385429] [2021-06-05 22:40:59,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:59,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:59,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:59,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:59,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739385429] [2021-06-05 22:40:59,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739385429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:59,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34471645] [2021-06-05 22:40:59,449 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 [2021-06-05 22:40:59,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:40:59,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:59,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:40:59,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:59,590 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 [2021-06-05 22:40:59,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:59,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:59,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:59,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:40:59,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:59,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34471645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:59,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:59,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:40:59,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144920854] [2021-06-05 22:40:59,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:40:59,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:59,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:40:59,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:40:59,634 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) [2021-06-05 22:41:01,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:01,535 INFO L93 Difference]: Finished difference Result 2991 states and 10538 transitions. [2021-06-05 22:41:01,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 22:41:01,536 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 [2021-06-05 22:41:01,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:01,540 INFO L225 Difference]: With dead ends: 2991 [2021-06-05 22:41:01,540 INFO L226 Difference]: Without dead ends: 2941 [2021-06-05 22:41:01,540 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 1674.5ms TimeCoverageRelationStatistics Valid=596, Invalid=2596, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 22:41:01,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2941 states. [2021-06-05 22:41:01,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2941 to 2278. [2021-06-05 22:41:01,565 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) [2021-06-05 22:41:01,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 8344 transitions. [2021-06-05 22:41:01,569 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 8344 transitions. Word has length 24 [2021-06-05 22:41:01,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:01,569 INFO L482 AbstractCegarLoop]: Abstraction has 2278 states and 8344 transitions. [2021-06-05 22:41:01,569 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) [2021-06-05 22:41:01,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 8344 transitions. [2021-06-05 22:41:01,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:41:01,572 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:01,572 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:01,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-06-05 22:41:01,772 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:41:01,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:01,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1255427878, now seen corresponding path program 163 times [2021-06-05 22:41:01,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:01,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23918351] [2021-06-05 22:41:01,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:01,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:01,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:01,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:01,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23918351] [2021-06-05 22:41:01,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23918351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:01,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289640015] [2021-06-05 22:41:01,963 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 [2021-06-05 22:41:01,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:01,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:41:01,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:02,122 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 [2021-06-05 22:41:02,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:02,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:02,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:02,124 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:41:02,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:02,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289640015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:02,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:02,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:41:02,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956317218] [2021-06-05 22:41:02,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:41:02,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:02,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:41:02,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:41:02,150 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) [2021-06-05 22:41:04,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:04,684 INFO L93 Difference]: Finished difference Result 3202 states and 11156 transitions. [2021-06-05 22:41:04,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 22:41:04,684 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 [2021-06-05 22:41:04,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:04,689 INFO L225 Difference]: With dead ends: 3202 [2021-06-05 22:41:04,689 INFO L226 Difference]: Without dead ends: 3150 [2021-06-05 22:41:04,690 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 2091.6ms TimeCoverageRelationStatistics Valid=736, Invalid=3820, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 22:41:04,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3150 states. [2021-06-05 22:41:04,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3150 to 2284. [2021-06-05 22:41:04,719 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) [2021-06-05 22:41:04,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 8367 transitions. [2021-06-05 22:41:04,723 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 8367 transitions. Word has length 24 [2021-06-05 22:41:04,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:04,723 INFO L482 AbstractCegarLoop]: Abstraction has 2284 states and 8367 transitions. [2021-06-05 22:41:04,723 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) [2021-06-05 22:41:04,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 8367 transitions. [2021-06-05 22:41:04,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:41:04,726 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:04,726 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:04,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-06-05 22:41:04,926 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:41:04,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:04,927 INFO L82 PathProgramCache]: Analyzing trace with hash 227278018, now seen corresponding path program 164 times [2021-06-05 22:41:04,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:04,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517706242] [2021-06-05 22:41:04,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:04,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:05,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:05,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:05,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517706242] [2021-06-05 22:41:05,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517706242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:05,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919434479] [2021-06-05 22:41:05,094 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 [2021-06-05 22:41:05,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:41:05,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:05,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:41:05,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:05,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:05,236 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 [2021-06-05 22:41:05,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:05,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:05,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:05,247 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:41:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:05,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919434479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:05,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:05,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:41:05,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226871824] [2021-06-05 22:41:05,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:41:05,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:05,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:41:05,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:41:05,331 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) [2021-06-05 22:41:05,852 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2021-06-05 22:41:07,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:07,660 INFO L93 Difference]: Finished difference Result 2986 states and 10490 transitions. [2021-06-05 22:41:07,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 22:41:07,660 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 [2021-06-05 22:41:07,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:07,665 INFO L225 Difference]: With dead ends: 2986 [2021-06-05 22:41:07,665 INFO L226 Difference]: Without dead ends: 2917 [2021-06-05 22:41:07,666 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 2014.6ms TimeCoverageRelationStatistics Valid=659, Invalid=3373, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 22:41:07,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2021-06-05 22:41:07,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 2288. [2021-06-05 22:41:07,695 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) [2021-06-05 22:41:07,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 8379 transitions. [2021-06-05 22:41:07,700 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 8379 transitions. Word has length 24 [2021-06-05 22:41:07,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:07,700 INFO L482 AbstractCegarLoop]: Abstraction has 2288 states and 8379 transitions. [2021-06-05 22:41:07,700 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) [2021-06-05 22:41:07,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 8379 transitions. [2021-06-05 22:41:07,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:41:07,703 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:07,703 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:07,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable533,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:07,904 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:41:07,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:07,904 INFO L82 PathProgramCache]: Analyzing trace with hash 550864196, now seen corresponding path program 165 times [2021-06-05 22:41:07,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:07,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933669168] [2021-06-05 22:41:07,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:07,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:08,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:08,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:08,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933669168] [2021-06-05 22:41:08,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933669168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:08,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714954262] [2021-06-05 22:41:08,067 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 [2021-06-05 22:41:08,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:41:08,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:08,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:41:08,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:08,207 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:08,207 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 [2021-06-05 22:41:08,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:08,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:08,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:08,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:41:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:08,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714954262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:08,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:08,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:41:08,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410031768] [2021-06-05 22:41:08,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:41:08,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:08,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:41:08,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:41:08,300 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) [2021-06-05 22:41:08,794 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-06-05 22:41:09,318 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-06-05 22:41:10,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:10,670 INFO L93 Difference]: Finished difference Result 2940 states and 10329 transitions. [2021-06-05 22:41:10,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 22:41:10,671 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 [2021-06-05 22:41:10,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:10,675 INFO L225 Difference]: With dead ends: 2940 [2021-06-05 22:41:10,675 INFO L226 Difference]: Without dead ends: 2900 [2021-06-05 22:41:10,676 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 2078.1ms TimeCoverageRelationStatistics Valid=683, Invalid=3739, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 22:41:10,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2900 states. [2021-06-05 22:41:10,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2900 to 2296. [2021-06-05 22:41:10,703 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) [2021-06-05 22:41:10,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2296 states to 2296 states and 8407 transitions. [2021-06-05 22:41:10,707 INFO L78 Accepts]: Start accepts. Automaton has 2296 states and 8407 transitions. Word has length 24 [2021-06-05 22:41:10,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:10,707 INFO L482 AbstractCegarLoop]: Abstraction has 2296 states and 8407 transitions. [2021-06-05 22:41:10,707 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) [2021-06-05 22:41:10,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2296 states and 8407 transitions. [2021-06-05 22:41:10,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:41:10,710 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:10,710 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:10,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-06-05 22:41:10,910 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:41:10,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:10,910 INFO L82 PathProgramCache]: Analyzing trace with hash -2058358978, now seen corresponding path program 166 times [2021-06-05 22:41:10,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:10,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002705305] [2021-06-05 22:41:10,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:10,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:11,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:11,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002705305] [2021-06-05 22:41:11,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002705305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:11,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996083996] [2021-06-05 22:41:11,067 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 [2021-06-05 22:41:11,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:41:11,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:11,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:41:11,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:11,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-05 22:41:11,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:11,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:11,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:11,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:41:11,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:11,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996083996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:11,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:11,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:41:11,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431445186] [2021-06-05 22:41:11,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:41:11,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:11,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:41:11,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:41:11,242 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) [2021-06-05 22:41:12,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:12,933 INFO L93 Difference]: Finished difference Result 2804 states and 9972 transitions. [2021-06-05 22:41:12,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 22:41:12,933 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 [2021-06-05 22:41:12,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:12,937 INFO L225 Difference]: With dead ends: 2804 [2021-06-05 22:41:12,937 INFO L226 Difference]: Without dead ends: 2783 [2021-06-05 22:41:12,937 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 1444.9ms TimeCoverageRelationStatistics Valid=514, Invalid=2566, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 22:41:12,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2021-06-05 22:41:12,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2280. [2021-06-05 22:41:12,961 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) [2021-06-05 22:41:12,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2280 states to 2280 states and 8353 transitions. [2021-06-05 22:41:12,965 INFO L78 Accepts]: Start accepts. Automaton has 2280 states and 8353 transitions. Word has length 24 [2021-06-05 22:41:12,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:12,965 INFO L482 AbstractCegarLoop]: Abstraction has 2280 states and 8353 transitions. [2021-06-05 22:41:12,965 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) [2021-06-05 22:41:12,965 INFO L276 IsEmpty]: Start isEmpty. Operand 2280 states and 8353 transitions. [2021-06-05 22:41:12,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:41:12,967 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:12,967 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:13,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:13,168 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:41:13,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:13,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1599381192, now seen corresponding path program 95 times [2021-06-05 22:41:13,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:13,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322376297] [2021-06-05 22:41:13,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:13,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:13,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:13,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322376297] [2021-06-05 22:41:13,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322376297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:13,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663322640] [2021-06-05 22:41:13,331 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 [2021-06-05 22:41:13,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:41:13,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:13,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:41:13,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:13,465 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 21 treesize of output 13 [2021-06-05 22:41:13,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:13,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:13,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:13,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:41:13,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:13,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663322640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:13,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:13,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:41:13,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520675477] [2021-06-05 22:41:13,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:41:13,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:13,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:41:13,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:41:13,512 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) [2021-06-05 22:41:15,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:15,958 INFO L93 Difference]: Finished difference Result 4178 states and 14207 transitions. [2021-06-05 22:41:15,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 22:41:15,958 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 [2021-06-05 22:41:15,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:15,964 INFO L225 Difference]: With dead ends: 4178 [2021-06-05 22:41:15,964 INFO L226 Difference]: Without dead ends: 4124 [2021-06-05 22:41:15,965 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1961 ImplicationChecksByTransitivity, 2065.9ms TimeCoverageRelationStatistics Valid=1073, Invalid=4627, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 22:41:15,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4124 states. [2021-06-05 22:41:16,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4124 to 2366. [2021-06-05 22:41:16,002 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) [2021-06-05 22:41:16,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2366 states to 2366 states and 8713 transitions. [2021-06-05 22:41:16,006 INFO L78 Accepts]: Start accepts. Automaton has 2366 states and 8713 transitions. Word has length 24 [2021-06-05 22:41:16,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:16,006 INFO L482 AbstractCegarLoop]: Abstraction has 2366 states and 8713 transitions. [2021-06-05 22:41:16,006 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) [2021-06-05 22:41:16,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2366 states and 8713 transitions. [2021-06-05 22:41:16,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:41:16,009 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:16,009 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:16,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable540 [2021-06-05 22:41:16,210 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:41:16,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:16,210 INFO L82 PathProgramCache]: Analyzing trace with hash 904724930, now seen corresponding path program 96 times [2021-06-05 22:41:16,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:16,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649159612] [2021-06-05 22:41:16,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:16,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:16,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:16,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:16,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649159612] [2021-06-05 22:41:16,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649159612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:16,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557143841] [2021-06-05 22:41:16,379 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 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 [2021-06-05 22:41:16,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:41:16,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:16,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:41:16,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:16,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:16,517 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 [2021-06-05 22:41:16,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:16,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:16,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:16,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:41:16,617 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:16,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557143841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:16,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:16,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:41:16,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911524838] [2021-06-05 22:41:16,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:41:16,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:16,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:41:16,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:41:16,618 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) [2021-06-05 22:41:17,263 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2021-06-05 22:41:19,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:19,932 INFO L93 Difference]: Finished difference Result 3774 states and 13082 transitions. [2021-06-05 22:41:19,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 22:41:19,932 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 [2021-06-05 22:41:19,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:19,938 INFO L225 Difference]: With dead ends: 3774 [2021-06-05 22:41:19,938 INFO L226 Difference]: Without dead ends: 3752 [2021-06-05 22:41:19,939 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2446 ImplicationChecksByTransitivity, 2940.7ms TimeCoverageRelationStatistics Valid=1227, Invalid=5579, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 22:41:19,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3752 states. [2021-06-05 22:41:19,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3752 to 2395. [2021-06-05 22:41:19,975 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) [2021-06-05 22:41:19,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 8828 transitions. [2021-06-05 22:41:19,980 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 8828 transitions. Word has length 24 [2021-06-05 22:41:19,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:19,980 INFO L482 AbstractCegarLoop]: Abstraction has 2395 states and 8828 transitions. [2021-06-05 22:41:19,980 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) [2021-06-05 22:41:19,980 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 8828 transitions. [2021-06-05 22:41:19,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:41:19,995 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:19,995 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:20,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-06-05 22:41:20,195 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:41:20,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:20,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1686558730, now seen corresponding path program 97 times [2021-06-05 22:41:20,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:20,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858829029] [2021-06-05 22:41:20,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:20,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:20,360 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:20,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:20,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858829029] [2021-06-05 22:41:20,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858829029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:20,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272524328] [2021-06-05 22:41:20,361 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 [2021-06-05 22:41:20,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:20,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:41:20,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:20,505 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 [2021-06-05 22:41:20,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:20,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:20,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:20,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:41:20,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:20,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272524328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:20,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:20,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:41:20,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678822773] [2021-06-05 22:41:20,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:41:20,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:20,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:41:20,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:41:20,562 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) [2021-06-05 22:41:20,885 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-06-05 22:41:22,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:22,996 INFO L93 Difference]: Finished difference Result 3784 states and 13107 transitions. [2021-06-05 22:41:22,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 22:41:22,996 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 [2021-06-05 22:41:22,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:23,002 INFO L225 Difference]: With dead ends: 3784 [2021-06-05 22:41:23,002 INFO L226 Difference]: Without dead ends: 3728 [2021-06-05 22:41:23,003 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1963 ImplicationChecksByTransitivity, 2130.3ms TimeCoverageRelationStatistics Valid=938, Invalid=4612, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 22:41:23,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3728 states. [2021-06-05 22:41:23,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3728 to 2433. [2021-06-05 22:41:23,047 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) [2021-06-05 22:41:23,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 8991 transitions. [2021-06-05 22:41:23,052 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 8991 transitions. Word has length 24 [2021-06-05 22:41:23,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:23,052 INFO L482 AbstractCegarLoop]: Abstraction has 2433 states and 8991 transitions. [2021-06-05 22:41:23,052 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) [2021-06-05 22:41:23,052 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 8991 transitions. [2021-06-05 22:41:23,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:41:23,055 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:23,055 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:23,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:23,256 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:41:23,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:23,256 INFO L82 PathProgramCache]: Analyzing trace with hash 638091246, now seen corresponding path program 167 times [2021-06-05 22:41:23,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:23,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191781488] [2021-06-05 22:41:23,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:23,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:23,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:23,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191781488] [2021-06-05 22:41:23,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191781488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:23,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499614343] [2021-06-05 22:41:23,408 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 [2021-06-05 22:41:23,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:41:23,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:23,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:41:23,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:23,539 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 [2021-06-05 22:41:23,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:23,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:23,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:23,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:41:23,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:23,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499614343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:23,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:23,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:41:23,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749888003] [2021-06-05 22:41:23,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:41:23,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:23,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:41:23,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:41:23,585 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) [2021-06-05 22:41:26,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:26,151 INFO L93 Difference]: Finished difference Result 4247 states and 14593 transitions. [2021-06-05 22:41:26,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 22:41:26,152 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 [2021-06-05 22:41:26,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:26,158 INFO L225 Difference]: With dead ends: 4247 [2021-06-05 22:41:26,158 INFO L226 Difference]: Without dead ends: 4186 [2021-06-05 22:41:26,159 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2142 ImplicationChecksByTransitivity, 2174.3ms TimeCoverageRelationStatistics Valid=1171, Invalid=5149, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 22:41:26,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4186 states. [2021-06-05 22:41:26,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4186 to 2486. [2021-06-05 22:41:26,195 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) [2021-06-05 22:41:26,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 9244 transitions. [2021-06-05 22:41:26,199 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 9244 transitions. Word has length 24 [2021-06-05 22:41:26,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:26,199 INFO L482 AbstractCegarLoop]: Abstraction has 2486 states and 9244 transitions. [2021-06-05 22:41:26,199 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) [2021-06-05 22:41:26,200 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 9244 transitions. [2021-06-05 22:41:26,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:41:26,202 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:26,202 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:26,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2021-06-05 22:41:26,403 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:41:26,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:26,403 INFO L82 PathProgramCache]: Analyzing trace with hash 961677424, now seen corresponding path program 168 times [2021-06-05 22:41:26,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:26,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608484116] [2021-06-05 22:41:26,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:26,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:26,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:26,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608484116] [2021-06-05 22:41:26,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608484116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:26,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766645578] [2021-06-05 22:41:26,568 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 [2021-06-05 22:41:26,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:41:26,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:26,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:41:26,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:26,708 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:26,708 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 [2021-06-05 22:41:26,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:26,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:26,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:26,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:41:26,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:26,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766645578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:26,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:26,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:41:26,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418613095] [2021-06-05 22:41:26,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:41:26,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:26,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:41:26,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:41:26,786 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) [2021-06-05 22:41:29,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:29,257 INFO L93 Difference]: Finished difference Result 3963 states and 13816 transitions. [2021-06-05 22:41:29,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 22:41:29,257 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 [2021-06-05 22:41:29,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:29,263 INFO L225 Difference]: With dead ends: 3963 [2021-06-05 22:41:29,263 INFO L226 Difference]: Without dead ends: 3909 [2021-06-05 22:41:29,264 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1979 ImplicationChecksByTransitivity, 2066.2ms TimeCoverageRelationStatistics Valid=1022, Invalid=4830, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 22:41:29,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3909 states. [2021-06-05 22:41:29,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3909 to 2494. [2021-06-05 22:41:29,299 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) [2021-06-05 22:41:29,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 9284 transitions. [2021-06-05 22:41:29,304 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 9284 transitions. Word has length 24 [2021-06-05 22:41:29,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:29,304 INFO L482 AbstractCegarLoop]: Abstraction has 2494 states and 9284 transitions. [2021-06-05 22:41:29,304 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) [2021-06-05 22:41:29,304 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 9284 transitions. [2021-06-05 22:41:29,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:41:29,307 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:29,307 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:29,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable546,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:29,508 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:41:29,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:29,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1498600092, now seen corresponding path program 98 times [2021-06-05 22:41:29,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:29,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809130650] [2021-06-05 22:41:29,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:29,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:29,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:29,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:29,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809130650] [2021-06-05 22:41:29,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809130650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:29,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751999464] [2021-06-05 22:41:29,668 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 [2021-06-05 22:41:29,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:41:29,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:29,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:41:29,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:29,821 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:29,821 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 [2021-06-05 22:41:29,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:29,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:29,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:29,831 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 22:41:29,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:29,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751999464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:29,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:29,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:41:29,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531316833] [2021-06-05 22:41:29,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:41:29,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:29,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:41:29,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:41:29,895 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) [2021-06-05 22:41:32,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:32,680 INFO L93 Difference]: Finished difference Result 4202 states and 14799 transitions. [2021-06-05 22:41:32,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 22:41:32,680 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 [2021-06-05 22:41:32,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:32,687 INFO L225 Difference]: With dead ends: 4202 [2021-06-05 22:41:32,687 INFO L226 Difference]: Without dead ends: 4168 [2021-06-05 22:41:32,687 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2126 ImplicationChecksByTransitivity, 2334.4ms TimeCoverageRelationStatistics Valid=988, Invalid=5332, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 22:41:32,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4168 states. [2021-06-05 22:41:32,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4168 to 2769. [2021-06-05 22:41:32,728 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) [2021-06-05 22:41:32,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2769 states to 2769 states and 10476 transitions. [2021-06-05 22:41:32,733 INFO L78 Accepts]: Start accepts. Automaton has 2769 states and 10476 transitions. Word has length 24 [2021-06-05 22:41:32,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:32,733 INFO L482 AbstractCegarLoop]: Abstraction has 2769 states and 10476 transitions. [2021-06-05 22:41:32,733 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) [2021-06-05 22:41:32,733 INFO L276 IsEmpty]: Start isEmpty. Operand 2769 states and 10476 transitions. [2021-06-05 22:41:32,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:41:32,737 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:32,737 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:32,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable548 [2021-06-05 22:41:32,937 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:41:32,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:32,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1293681958, now seen corresponding path program 169 times [2021-06-05 22:41:32,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:32,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954840083] [2021-06-05 22:41:32,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:32,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:33,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:33,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:33,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954840083] [2021-06-05 22:41:33,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954840083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:33,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080197254] [2021-06-05 22:41:33,105 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 [2021-06-05 22:41:33,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:33,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:41:33,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:33,255 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 [2021-06-05 22:41:33,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:33,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:33,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:33,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:41:33,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:33,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080197254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:33,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:33,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:41:33,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882064571] [2021-06-05 22:41:33,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:41:33,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:33,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:41:33,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:41:33,288 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) [2021-06-05 22:41:35,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:35,899 INFO L93 Difference]: Finished difference Result 4592 states and 16115 transitions. [2021-06-05 22:41:35,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 22:41:35,899 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 [2021-06-05 22:41:35,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:35,906 INFO L225 Difference]: With dead ends: 4592 [2021-06-05 22:41:35,906 INFO L226 Difference]: Without dead ends: 4538 [2021-06-05 22:41:35,907 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1858 ImplicationChecksByTransitivity, 2112.7ms TimeCoverageRelationStatistics Valid=1040, Invalid=4510, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 22:41:35,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4538 states. [2021-06-05 22:41:35,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4538 to 2781. [2021-06-05 22:41:35,960 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) [2021-06-05 22:41:35,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2781 states to 2781 states and 10516 transitions. [2021-06-05 22:41:35,965 INFO L78 Accepts]: Start accepts. Automaton has 2781 states and 10516 transitions. Word has length 24 [2021-06-05 22:41:35,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:35,965 INFO L482 AbstractCegarLoop]: Abstraction has 2781 states and 10516 transitions. [2021-06-05 22:41:35,965 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) [2021-06-05 22:41:35,965 INFO L276 IsEmpty]: Start isEmpty. Operand 2781 states and 10516 transitions. [2021-06-05 22:41:35,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:41:35,969 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:35,969 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:36,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:36,169 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:41:36,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:36,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1026428984, now seen corresponding path program 170 times [2021-06-05 22:41:36,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:36,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769657844] [2021-06-05 22:41:36,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:36,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:36,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:36,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769657844] [2021-06-05 22:41:36,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769657844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:36,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138403850] [2021-06-05 22:41:36,368 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 [2021-06-05 22:41:36,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:41:36,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:36,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:41:36,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:36,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:36,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:36,584 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 [2021-06-05 22:41:36,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:36,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:36,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:36,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 22:41:36,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:36,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138403850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:36,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:36,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:41:36,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944925803] [2021-06-05 22:41:36,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:41:36,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:36,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:41:36,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:41:36,618 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) [2021-06-05 22:41:36,867 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-06-05 22:41:38,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:38,057 INFO L93 Difference]: Finished difference Result 3378 states and 12278 transitions. [2021-06-05 22:41:38,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:41:38,058 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 [2021-06-05 22:41:38,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:38,063 INFO L225 Difference]: With dead ends: 3378 [2021-06-05 22:41:38,063 INFO L226 Difference]: Without dead ends: 3328 [2021-06-05 22:41:38,064 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1267.6ms TimeCoverageRelationStatistics Valid=357, Invalid=2093, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:41:38,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3328 states. [2021-06-05 22:41:38,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3328 to 2785. [2021-06-05 22:41:38,098 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) [2021-06-05 22:41:38,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2785 states to 2785 states and 10529 transitions. [2021-06-05 22:41:38,104 INFO L78 Accepts]: Start accepts. Automaton has 2785 states and 10529 transitions. Word has length 24 [2021-06-05 22:41:38,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:38,104 INFO L482 AbstractCegarLoop]: Abstraction has 2785 states and 10529 transitions. [2021-06-05 22:41:38,105 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) [2021-06-05 22:41:38,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2785 states and 10529 transitions. [2021-06-05 22:41:38,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:41:38,109 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:38,109 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:38,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-06-05 22:41:38,309 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:41:38,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:38,309 INFO L82 PathProgramCache]: Analyzing trace with hash -2054578844, now seen corresponding path program 171 times [2021-06-05 22:41:38,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:38,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662385048] [2021-06-05 22:41:38,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:38,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:38,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:38,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:38,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662385048] [2021-06-05 22:41:38,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662385048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:38,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643374591] [2021-06-05 22:41:38,470 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 [2021-06-05 22:41:38,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:41:38,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:38,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:41:38,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:38,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:38,620 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 [2021-06-05 22:41:38,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:38,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:38,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:38,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:41:38,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:38,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643374591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:38,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:38,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:41:38,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703084759] [2021-06-05 22:41:38,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:41:38,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:38,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:41:38,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:41:38,717 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) [2021-06-05 22:41:38,988 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2021-06-05 22:41:40,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:40,123 INFO L93 Difference]: Finished difference Result 3256 states and 11952 transitions. [2021-06-05 22:41:40,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:41:40,123 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 [2021-06-05 22:41:40,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:40,128 INFO L225 Difference]: With dead ends: 3256 [2021-06-05 22:41:40,129 INFO L226 Difference]: Without dead ends: 3220 [2021-06-05 22:41:40,129 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1247.2ms TimeCoverageRelationStatistics Valid=371, Invalid=1981, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 22:41:40,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2021-06-05 22:41:40,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 2790. [2021-06-05 22:41:40,164 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) [2021-06-05 22:41:40,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 10544 transitions. [2021-06-05 22:41:40,170 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 10544 transitions. Word has length 24 [2021-06-05 22:41:40,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:40,170 INFO L482 AbstractCegarLoop]: Abstraction has 2790 states and 10544 transitions. [2021-06-05 22:41:40,170 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) [2021-06-05 22:41:40,170 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 10544 transitions. [2021-06-05 22:41:40,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:41:40,174 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:40,174 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:40,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-06-05 22:41:40,375 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:41:40,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:40,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1730992666, now seen corresponding path program 172 times [2021-06-05 22:41:40,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:40,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463094706] [2021-06-05 22:41:40,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:40,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:40,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:40,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463094706] [2021-06-05 22:41:40,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463094706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:40,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927929743] [2021-06-05 22:41:40,562 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 [2021-06-05 22:41:40,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:41:40,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:40,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:41:40,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:40,700 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 [2021-06-05 22:41:40,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:40,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:40,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:40,703 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:41:40,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:40,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927929743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:40,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:40,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:41:40,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17435] [2021-06-05 22:41:40,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:41:40,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:40,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:41:40,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:41:40,746 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) [2021-06-05 22:41:41,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:41,921 INFO L93 Difference]: Finished difference Result 3207 states and 11839 transitions. [2021-06-05 22:41:41,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:41:41,921 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 [2021-06-05 22:41:41,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:41,927 INFO L225 Difference]: With dead ends: 3207 [2021-06-05 22:41:41,927 INFO L226 Difference]: Without dead ends: 3182 [2021-06-05 22:41:41,927 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1039.7ms TimeCoverageRelationStatistics Valid=309, Invalid=1583, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:41:41,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2021-06-05 22:41:41,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 2783. [2021-06-05 22:41:41,961 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) [2021-06-05 22:41:41,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 10523 transitions. [2021-06-05 22:41:41,967 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 10523 transitions. Word has length 24 [2021-06-05 22:41:41,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:41,967 INFO L482 AbstractCegarLoop]: Abstraction has 2783 states and 10523 transitions. [2021-06-05 22:41:41,967 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) [2021-06-05 22:41:41,967 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 10523 transitions. [2021-06-05 22:41:41,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:41:41,971 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:41,971 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:42,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable555 [2021-06-05 22:41:42,171 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:41:42,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:42,172 INFO L82 PathProgramCache]: Analyzing trace with hash -406982280, now seen corresponding path program 173 times [2021-06-05 22:41:42,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:42,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810358739] [2021-06-05 22:41:42,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:42,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:42,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:42,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:42,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810358739] [2021-06-05 22:41:42,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810358739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:42,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867385243] [2021-06-05 22:41:42,363 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 [2021-06-05 22:41:42,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:41:42,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:42,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:41:42,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:42,531 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 [2021-06-05 22:41:42,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:42,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:42,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:42,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 22:41:42,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:42,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867385243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:42,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:42,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:41:42,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602886640] [2021-06-05 22:41:42,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:41:42,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:42,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:41:42,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:41:42,562 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) [2021-06-05 22:41:42,825 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-06-05 22:41:44,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:44,299 INFO L93 Difference]: Finished difference Result 3338 states and 12184 transitions. [2021-06-05 22:41:44,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 22:41:44,299 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 [2021-06-05 22:41:44,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:44,305 INFO L225 Difference]: With dead ends: 3338 [2021-06-05 22:41:44,305 INFO L226 Difference]: Without dead ends: 3302 [2021-06-05 22:41:44,305 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1346.0ms TimeCoverageRelationStatistics Valid=390, Invalid=2366, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 22:41:44,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3302 states. [2021-06-05 22:41:44,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3302 to 2785. [2021-06-05 22:41:44,339 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) [2021-06-05 22:41:44,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2785 states to 2785 states and 10529 transitions. [2021-06-05 22:41:44,345 INFO L78 Accepts]: Start accepts. Automaton has 2785 states and 10529 transitions. Word has length 24 [2021-06-05 22:41:44,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:44,345 INFO L482 AbstractCegarLoop]: Abstraction has 2785 states and 10529 transitions. [2021-06-05 22:41:44,345 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) [2021-06-05 22:41:44,345 INFO L276 IsEmpty]: Start isEmpty. Operand 2785 states and 10529 transitions. [2021-06-05 22:41:44,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:41:44,349 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:44,349 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:44,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable556,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:44,549 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:41:44,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:44,549 INFO L82 PathProgramCache]: Analyzing trace with hash -189557394, now seen corresponding path program 174 times [2021-06-05 22:41:44,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:44,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769992964] [2021-06-05 22:41:44,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:44,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:44,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:44,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:44,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769992964] [2021-06-05 22:41:44,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769992964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:44,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215082447] [2021-06-05 22:41:44,707 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 [2021-06-05 22:41:44,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:41:44,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:44,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 22:41:44,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:44,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:44,876 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:44,876 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 [2021-06-05 22:41:44,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:44,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:44,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:44,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:350 [2021-06-05 22:41:45,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:45,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215082447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:45,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:45,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 22:41:45,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485379100] [2021-06-05 22:41:45,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:41:45,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:45,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:41:45,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:41:45,159 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) [2021-06-05 22:41:45,581 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2021-06-05 22:41:47,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:47,359 INFO L93 Difference]: Finished difference Result 3326 states and 12143 transitions. [2021-06-05 22:41:47,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 22:41:47,359 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 [2021-06-05 22:41:47,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:47,365 INFO L225 Difference]: With dead ends: 3326 [2021-06-05 22:41:47,365 INFO L226 Difference]: Without dead ends: 3290 [2021-06-05 22:41:47,365 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 2006.2ms TimeCoverageRelationStatistics Valid=548, Invalid=2644, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 22:41:47,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3290 states. [2021-06-05 22:41:47,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3290 to 2794. [2021-06-05 22:41:47,400 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) [2021-06-05 22:41:47,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2794 states to 2794 states and 10555 transitions. [2021-06-05 22:41:47,406 INFO L78 Accepts]: Start accepts. Automaton has 2794 states and 10555 transitions. Word has length 24 [2021-06-05 22:41:47,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:47,406 INFO L482 AbstractCegarLoop]: Abstraction has 2794 states and 10555 transitions. [2021-06-05 22:41:47,406 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) [2021-06-05 22:41:47,406 INFO L276 IsEmpty]: Start isEmpty. Operand 2794 states and 10555 transitions. [2021-06-05 22:41:47,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:41:47,410 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:47,410 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:47,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable557 [2021-06-05 22:41:47,610 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:41:47,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:47,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1023295834, now seen corresponding path program 175 times [2021-06-05 22:41:47,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:47,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450545035] [2021-06-05 22:41:47,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:47,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:47,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:47,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:47,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450545035] [2021-06-05 22:41:47,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450545035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:47,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063397498] [2021-06-05 22:41:47,786 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 [2021-06-05 22:41:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:47,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:41:47,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:47,922 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 [2021-06-05 22:41:47,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:47,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:47,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:47,926 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:41:47,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:47,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063397498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:47,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:47,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:41:47,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677359100] [2021-06-05 22:41:47,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:41:47,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:47,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:41:47,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:41:47,969 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) [2021-06-05 22:41:48,208 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-06-05 22:41:49,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:49,351 INFO L93 Difference]: Finished difference Result 3320 states and 12153 transitions. [2021-06-05 22:41:49,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 22:41:49,351 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 [2021-06-05 22:41:49,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:49,357 INFO L225 Difference]: With dead ends: 3320 [2021-06-05 22:41:49,357 INFO L226 Difference]: Without dead ends: 3296 [2021-06-05 22:41:49,357 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1137.2ms TimeCoverageRelationStatistics Valid=371, Invalid=2079, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:41:49,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3296 states. [2021-06-05 22:41:49,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3296 to 2790. [2021-06-05 22:41:49,388 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) [2021-06-05 22:41:49,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 10542 transitions. [2021-06-05 22:41:49,394 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 10542 transitions. Word has length 24 [2021-06-05 22:41:49,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:49,394 INFO L482 AbstractCegarLoop]: Abstraction has 2790 states and 10542 transitions. [2021-06-05 22:41:49,394 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) [2021-06-05 22:41:49,394 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 10542 transitions. [2021-06-05 22:41:49,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:41:49,398 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:49,398 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:49,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-06-05 22:41:49,598 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:41:49,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:49,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1855921234, now seen corresponding path program 176 times [2021-06-05 22:41:49,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:49,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891771892] [2021-06-05 22:41:49,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:49,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:49,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:49,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:49,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891771892] [2021-06-05 22:41:49,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891771892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:49,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020046330] [2021-06-05 22:41:49,746 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 [2021-06-05 22:41:49,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:41:49,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:49,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:41:49,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:49,872 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:49,872 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 [2021-06-05 22:41:49,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:49,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:49,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:49,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 22:41:49,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:49,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020046330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:49,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:49,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:41:49,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077963414] [2021-06-05 22:41:49,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:41:49,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:49,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:41:49,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:41:49,992 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) [2021-06-05 22:41:50,269 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-06-05 22:41:50,697 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2021-06-05 22:41:51,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:51,537 INFO L93 Difference]: Finished difference Result 3245 states and 11918 transitions. [2021-06-05 22:41:51,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:41:51,538 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 [2021-06-05 22:41:51,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:51,543 INFO L225 Difference]: With dead ends: 3245 [2021-06-05 22:41:51,543 INFO L226 Difference]: Without dead ends: 3219 [2021-06-05 22:41:51,544 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1297.4ms TimeCoverageRelationStatistics Valid=364, Invalid=1892, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:41:51,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3219 states. [2021-06-05 22:41:51,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3219 to 2794. [2021-06-05 22:41:51,577 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) [2021-06-05 22:41:51,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2794 states to 2794 states and 10553 transitions. [2021-06-05 22:41:51,583 INFO L78 Accepts]: Start accepts. Automaton has 2794 states and 10553 transitions. Word has length 24 [2021-06-05 22:41:51,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:51,583 INFO L482 AbstractCegarLoop]: Abstraction has 2794 states and 10553 transitions. [2021-06-05 22:41:51,584 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) [2021-06-05 22:41:51,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2794 states and 10553 transitions. [2021-06-05 22:41:51,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:41:51,587 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:51,587 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:51,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2021-06-05 22:41:51,788 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:41:51,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:51,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1532335056, now seen corresponding path program 177 times [2021-06-05 22:41:51,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:51,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397315581] [2021-06-05 22:41:51,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:51,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:51,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:51,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397315581] [2021-06-05 22:41:51,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397315581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:51,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337290180] [2021-06-05 22:41:51,937 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 [2021-06-05 22:41:51,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:41:51,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:51,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:41:51,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:52,077 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:52,077 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 [2021-06-05 22:41:52,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:52,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:52,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:52,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 22:41:52,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:52,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337290180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:52,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:52,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:41:52,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098654557] [2021-06-05 22:41:52,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:41:52,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:52,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:41:52,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:41:52,202 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) [2021-06-05 22:41:52,471 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-06-05 22:41:52,862 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2021-06-05 22:41:53,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:53,662 INFO L93 Difference]: Finished difference Result 3212 states and 11807 transitions. [2021-06-05 22:41:53,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:41:53,662 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 [2021-06-05 22:41:53,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:53,668 INFO L225 Difference]: With dead ends: 3212 [2021-06-05 22:41:53,668 INFO L226 Difference]: Without dead ends: 3194 [2021-06-05 22:41:53,668 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 1252.8ms TimeCoverageRelationStatistics Valid=338, Invalid=1824, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:41:53,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3194 states. [2021-06-05 22:41:53,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3194 to 2797. [2021-06-05 22:41:53,703 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) [2021-06-05 22:41:53,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2797 states to 2797 states and 10562 transitions. [2021-06-05 22:41:53,709 INFO L78 Accepts]: Start accepts. Automaton has 2797 states and 10562 transitions. Word has length 24 [2021-06-05 22:41:53,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:53,709 INFO L482 AbstractCegarLoop]: Abstraction has 2797 states and 10562 transitions. [2021-06-05 22:41:53,709 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) [2021-06-05 22:41:53,709 INFO L276 IsEmpty]: Start isEmpty. Operand 2797 states and 10562 transitions. [2021-06-05 22:41:53,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:41:53,713 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:53,713 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:53,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:53,914 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:41:53,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:53,914 INFO L82 PathProgramCache]: Analyzing trace with hash 153409066, now seen corresponding path program 178 times [2021-06-05 22:41:53,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:53,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801455527] [2021-06-05 22:41:53,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:53,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:54,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:54,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:54,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801455527] [2021-06-05 22:41:54,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801455527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:54,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289821470] [2021-06-05 22:41:54,060 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 [2021-06-05 22:41:54,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:41:54,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:54,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:41:54,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:54,179 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 [2021-06-05 22:41:54,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:54,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:54,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:54,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:41:54,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:54,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289821470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:54,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:54,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:41:54,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467501110] [2021-06-05 22:41:54,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:41:54,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:54,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:41:54,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:41:54,237 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) [2021-06-05 22:41:54,830 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-06-05 22:41:55,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:55,396 INFO L93 Difference]: Finished difference Result 3156 states and 11659 transitions. [2021-06-05 22:41:55,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:41:55,397 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 [2021-06-05 22:41:55,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:55,402 INFO L225 Difference]: With dead ends: 3156 [2021-06-05 22:41:55,402 INFO L226 Difference]: Without dead ends: 3139 [2021-06-05 22:41:55,402 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 986.7ms TimeCoverageRelationStatistics Valid=269, Invalid=1453, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:41:55,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3139 states. [2021-06-05 22:41:55,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3139 to 2791. [2021-06-05 22:41:55,432 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) [2021-06-05 22:41:55,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 10545 transitions. [2021-06-05 22:41:55,438 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 10545 transitions. Word has length 24 [2021-06-05 22:41:55,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:55,438 INFO L482 AbstractCegarLoop]: Abstraction has 2791 states and 10545 transitions. [2021-06-05 22:41:55,438 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) [2021-06-05 22:41:55,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 10545 transitions. [2021-06-05 22:41:55,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:41:55,441 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:55,441 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:55,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-06-05 22:41:55,649 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:41:55,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:55,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1558844418, now seen corresponding path program 179 times [2021-06-05 22:41:55,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:55,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413857187] [2021-06-05 22:41:55,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:55,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:55,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:55,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413857187] [2021-06-05 22:41:55,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413857187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:55,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106339544] [2021-06-05 22:41:55,796 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 [2021-06-05 22:41:55,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:41:55,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:55,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:41:55,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:55,911 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 [2021-06-05 22:41:55,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:55,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:55,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:55,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:41:55,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:55,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106339544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:55,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:55,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:41:55,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471334623] [2021-06-05 22:41:55,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:41:55,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:55,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:41:55,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:41:55,971 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) [2021-06-05 22:41:57,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:57,211 INFO L93 Difference]: Finished difference Result 3273 states and 12003 transitions. [2021-06-05 22:41:57,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:41:57,212 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 [2021-06-05 22:41:57,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:57,217 INFO L225 Difference]: With dead ends: 3273 [2021-06-05 22:41:57,217 INFO L226 Difference]: Without dead ends: 3247 [2021-06-05 22:41:57,217 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 997.0ms TimeCoverageRelationStatistics Valid=311, Invalid=1581, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:41:57,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2021-06-05 22:41:57,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 2791. [2021-06-05 22:41:57,248 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) [2021-06-05 22:41:57,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 10545 transitions. [2021-06-05 22:41:57,253 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 10545 transitions. Word has length 24 [2021-06-05 22:41:57,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:57,253 INFO L482 AbstractCegarLoop]: Abstraction has 2791 states and 10545 transitions. [2021-06-05 22:41:57,253 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) [2021-06-05 22:41:57,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 10545 transitions. [2021-06-05 22:41:57,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:41:57,257 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:57,257 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:57,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 301 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-06-05 22:41:57,472 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:41:57,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:57,473 INFO L82 PathProgramCache]: Analyzing trace with hash 945261704, now seen corresponding path program 180 times [2021-06-05 22:41:57,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:57,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081507949] [2021-06-05 22:41:57,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:57,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:57,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:57,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081507949] [2021-06-05 22:41:57,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081507949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:57,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507686553] [2021-06-05 22:41:57,639 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 [2021-06-05 22:41:57,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:41:57,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:57,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:41:57,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:57,797 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 [2021-06-05 22:41:57,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:57,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:57,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:57,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:41:57,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:57,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507686553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:57,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:57,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:41:57,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952850139] [2021-06-05 22:41:57,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:41:57,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:57,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:41:57,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:41:57,865 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) [2021-06-05 22:41:58,401 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-05 22:41:58,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:58,900 INFO L93 Difference]: Finished difference Result 3237 states and 11894 transitions. [2021-06-05 22:41:58,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:41:58,901 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 [2021-06-05 22:41:58,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:58,906 INFO L225 Difference]: With dead ends: 3237 [2021-06-05 22:41:58,906 INFO L226 Difference]: Without dead ends: 3215 [2021-06-05 22:41:58,906 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 947.8ms TimeCoverageRelationStatistics Valid=303, Invalid=1503, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:41:58,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3215 states. [2021-06-05 22:41:58,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3215 to 2791. [2021-06-05 22:41:58,939 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) [2021-06-05 22:41:58,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 10545 transitions. [2021-06-05 22:41:58,944 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 10545 transitions. Word has length 24 [2021-06-05 22:41:58,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:58,944 INFO L482 AbstractCegarLoop]: Abstraction has 2791 states and 10545 transitions. [2021-06-05 22:41:58,944 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) [2021-06-05 22:41:58,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 10545 transitions. [2021-06-05 22:41:58,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:41:58,948 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:58,948 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:59,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable577 [2021-06-05 22:41:59,164 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:41:59,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:59,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1622816248, now seen corresponding path program 181 times [2021-06-05 22:41:59,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:59,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396664317] [2021-06-05 22:41:59,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:59,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:59,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:59,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396664317] [2021-06-05 22:41:59,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396664317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:59,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91273168] [2021-06-05 22:41:59,359 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 [2021-06-05 22:41:59,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:59,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:41:59,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:59,489 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 [2021-06-05 22:41:59,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:59,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:59,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:59,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:41:59,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:59,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91273168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:59,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:59,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:41:59,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222639275] [2021-06-05 22:41:59,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:41:59,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:59,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:41:59,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:41:59,563 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) [2021-06-05 22:42:00,182 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-06-05 22:42:00,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:00,837 INFO L93 Difference]: Finished difference Result 3213 states and 11832 transitions. [2021-06-05 22:42:00,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:42:00,837 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 [2021-06-05 22:42:00,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:00,842 INFO L225 Difference]: With dead ends: 3213 [2021-06-05 22:42:00,842 INFO L226 Difference]: Without dead ends: 3190 [2021-06-05 22:42:00,842 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1091.4ms TimeCoverageRelationStatistics Valid=309, Invalid=1671, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:42:00,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2021-06-05 22:42:00,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 2793. [2021-06-05 22:42:00,872 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) [2021-06-05 22:42:00,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2793 states to 2793 states and 10550 transitions. [2021-06-05 22:42:00,877 INFO L78 Accepts]: Start accepts. Automaton has 2793 states and 10550 transitions. Word has length 24 [2021-06-05 22:42:00,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:00,877 INFO L482 AbstractCegarLoop]: Abstraction has 2793 states and 10550 transitions. [2021-06-05 22:42:00,877 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) [2021-06-05 22:42:00,877 INFO L276 IsEmpty]: Start isEmpty. Operand 2793 states and 10550 transitions. [2021-06-05 22:42:00,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:42:00,881 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:00,881 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:01,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:01,097 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:42:01,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:01,097 INFO L82 PathProgramCache]: Analyzing trace with hash -643401800, now seen corresponding path program 182 times [2021-06-05 22:42:01,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:01,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850575158] [2021-06-05 22:42:01,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:01,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:01,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:01,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850575158] [2021-06-05 22:42:01,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850575158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:01,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332984222] [2021-06-05 22:42:01,270 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 [2021-06-05 22:42:01,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:42:01,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:01,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:42:01,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:01,395 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 [2021-06-05 22:42:01,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:01,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:01,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:01,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:42:01,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:01,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332984222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:01,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:01,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:42:01,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205235425] [2021-06-05 22:42:01,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:42:01,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:01,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:42:01,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:42:01,513 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) [2021-06-05 22:42:02,073 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-05 22:42:02,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:02,621 INFO L93 Difference]: Finished difference Result 3218 states and 11844 transitions. [2021-06-05 22:42:02,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:42:02,621 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 [2021-06-05 22:42:02,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:02,626 INFO L225 Difference]: With dead ends: 3218 [2021-06-05 22:42:02,626 INFO L226 Difference]: Without dead ends: 3196 [2021-06-05 22:42:02,626 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1005.3ms TimeCoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:42:02,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3196 states. [2021-06-05 22:42:02,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3196 to 2790. [2021-06-05 22:42:02,659 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) [2021-06-05 22:42:02,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 10542 transitions. [2021-06-05 22:42:02,665 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 10542 transitions. Word has length 24 [2021-06-05 22:42:02,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:02,665 INFO L482 AbstractCegarLoop]: Abstraction has 2790 states and 10542 transitions. [2021-06-05 22:42:02,665 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) [2021-06-05 22:42:02,665 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 10542 transitions. [2021-06-05 22:42:02,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:42:02,669 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:02,669 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:02,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-06-05 22:42:02,884 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:42:02,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:02,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1889346820, now seen corresponding path program 99 times [2021-06-05 22:42:02,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:02,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267371515] [2021-06-05 22:42:02,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:02,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:03,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:03,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:03,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267371515] [2021-06-05 22:42:03,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267371515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:03,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012609768] [2021-06-05 22:42:03,051 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 [2021-06-05 22:42:03,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:42:03,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:03,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:42:03,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:03,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:03,206 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 [2021-06-05 22:42:03,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:03,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:03,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:03,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:42:03,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:03,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012609768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:03,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:03,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:42:03,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852908516] [2021-06-05 22:42:03,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:42:03,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:03,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:42:03,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:42:03,315 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) [2021-06-05 22:42:03,794 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-06-05 22:42:04,079 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-06-05 22:42:07,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:07,015 INFO L93 Difference]: Finished difference Result 4181 states and 14688 transitions. [2021-06-05 22:42:07,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 22:42:07,015 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 [2021-06-05 22:42:07,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:07,022 INFO L225 Difference]: With dead ends: 4181 [2021-06-05 22:42:07,022 INFO L226 Difference]: Without dead ends: 4131 [2021-06-05 22:42:07,022 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2712 ImplicationChecksByTransitivity, 3289.4ms TimeCoverageRelationStatistics Valid=1278, Invalid=6378, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 22:42:07,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4131 states. [2021-06-05 22:42:07,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4131 to 2834. [2021-06-05 22:42:07,065 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) [2021-06-05 22:42:07,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2834 states to 2834 states and 10729 transitions. [2021-06-05 22:42:07,071 INFO L78 Accepts]: Start accepts. Automaton has 2834 states and 10729 transitions. Word has length 24 [2021-06-05 22:42:07,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:07,071 INFO L482 AbstractCegarLoop]: Abstraction has 2834 states and 10729 transitions. [2021-06-05 22:42:07,071 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) [2021-06-05 22:42:07,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2834 states and 10729 transitions. [2021-06-05 22:42:07,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:42:07,075 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:07,076 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:07,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,305 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:07,289 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:42:07,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:07,289 INFO L82 PathProgramCache]: Analyzing trace with hash 98485646, now seen corresponding path program 100 times [2021-06-05 22:42:07,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:07,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64351681] [2021-06-05 22:42:07,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:07,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:07,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:07,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64351681] [2021-06-05 22:42:07,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64351681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:07,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901724967] [2021-06-05 22:42:07,457 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 [2021-06-05 22:42:07,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:42:07,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:07,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:42:07,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:07,588 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 [2021-06-05 22:42:07,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:07,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:07,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:07,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:42:07,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:07,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901724967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:07,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:07,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:42:07,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237255557] [2021-06-05 22:42:07,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:42:07,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:07,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:42:07,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:42:07,643 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) [2021-06-05 22:42:10,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:10,139 INFO L93 Difference]: Finished difference Result 3970 states and 14222 transitions. [2021-06-05 22:42:10,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 22:42:10,139 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 [2021-06-05 22:42:10,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:10,146 INFO L225 Difference]: With dead ends: 3970 [2021-06-05 22:42:10,146 INFO L226 Difference]: Without dead ends: 3948 [2021-06-05 22:42:10,146 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1996 ImplicationChecksByTransitivity, 2059.9ms TimeCoverageRelationStatistics Valid=1020, Invalid=4832, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 22:42:10,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2021-06-05 22:42:10,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 2862. [2021-06-05 22:42:10,187 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) [2021-06-05 22:42:10,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 10840 transitions. [2021-06-05 22:42:10,193 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 10840 transitions. Word has length 24 [2021-06-05 22:42:10,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:10,193 INFO L482 AbstractCegarLoop]: Abstraction has 2862 states and 10840 transitions. [2021-06-05 22:42:10,193 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) [2021-06-05 22:42:10,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 10840 transitions. [2021-06-05 22:42:10,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:42:10,197 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:10,197 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:10,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:10,397 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:42:10,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:10,398 INFO L82 PathProgramCache]: Analyzing trace with hash -168148038, now seen corresponding path program 183 times [2021-06-05 22:42:10,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:10,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432471666] [2021-06-05 22:42:10,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:10,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:10,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:10,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:10,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432471666] [2021-06-05 22:42:10,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432471666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:10,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428190417] [2021-06-05 22:42:10,549 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 [2021-06-05 22:42:10,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:42:10,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:10,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:42:10,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:10,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:10,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:10,703 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 [2021-06-05 22:42:10,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:10,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:10,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:10,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:54 [2021-06-05 22:42:10,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:10,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428190417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:10,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:10,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 22:42:10,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312983092] [2021-06-05 22:42:10,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:42:10,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:10,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:42:10,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:42:10,913 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) [2021-06-05 22:42:11,440 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 40 [2021-06-05 22:42:13,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:13,539 INFO L93 Difference]: Finished difference Result 3928 states and 14042 transitions. [2021-06-05 22:42:13,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 22:42:13,540 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 [2021-06-05 22:42:13,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:13,546 INFO L225 Difference]: With dead ends: 3928 [2021-06-05 22:42:13,546 INFO L226 Difference]: Without dead ends: 3896 [2021-06-05 22:42:13,547 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 2243.9ms TimeCoverageRelationStatistics Valid=723, Invalid=4247, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 22:42:13,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3896 states. [2021-06-05 22:42:13,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3896 to 2879. [2021-06-05 22:42:13,587 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) [2021-06-05 22:42:13,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 10911 transitions. [2021-06-05 22:42:13,593 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 10911 transitions. Word has length 24 [2021-06-05 22:42:13,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:13,593 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 10911 transitions. [2021-06-05 22:42:13,593 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) [2021-06-05 22:42:13,593 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 10911 transitions. [2021-06-05 22:42:13,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:42:13,597 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:13,597 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:13,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable584 [2021-06-05 22:42:13,813 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:42:13,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:13,813 INFO L82 PathProgramCache]: Analyzing trace with hash 155438140, now seen corresponding path program 184 times [2021-06-05 22:42:13,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:13,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054672988] [2021-06-05 22:42:13,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:13,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:13,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:13,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:13,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054672988] [2021-06-05 22:42:13,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054672988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:13,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995264501] [2021-06-05 22:42:13,965 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 [2021-06-05 22:42:13,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:42:13,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:13,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:42:13,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:14,116 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 [2021-06-05 22:42:14,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:14,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:14,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:14,119 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:42:14,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:14,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995264501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:14,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:14,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:42:14,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330627720] [2021-06-05 22:42:14,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:42:14,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:14,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:42:14,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:42:14,163 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) [2021-06-05 22:42:16,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:16,748 INFO L93 Difference]: Finished difference Result 3884 states and 13980 transitions. [2021-06-05 22:42:16,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 22:42:16,749 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 [2021-06-05 22:42:16,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:16,755 INFO L225 Difference]: With dead ends: 3884 [2021-06-05 22:42:16,755 INFO L226 Difference]: Without dead ends: 3862 [2021-06-05 22:42:16,756 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2140 ImplicationChecksByTransitivity, 2200.4ms TimeCoverageRelationStatistics Valid=973, Invalid=5189, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 22:42:16,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2021-06-05 22:42:16,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 2881. [2021-06-05 22:42:16,799 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) [2021-06-05 22:42:16,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2881 states to 2881 states and 10916 transitions. [2021-06-05 22:42:16,805 INFO L78 Accepts]: Start accepts. Automaton has 2881 states and 10916 transitions. Word has length 24 [2021-06-05 22:42:16,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:16,805 INFO L482 AbstractCegarLoop]: Abstraction has 2881 states and 10916 transitions. [2021-06-05 22:42:16,805 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) [2021-06-05 22:42:16,805 INFO L276 IsEmpty]: Start isEmpty. Operand 2881 states and 10916 transitions. [2021-06-05 22:42:16,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:42:16,809 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:16,809 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:17,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable596 [2021-06-05 22:42:17,010 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:42:17,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:17,010 INFO L82 PathProgramCache]: Analyzing trace with hash 692360808, now seen corresponding path program 101 times [2021-06-05 22:42:17,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:17,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872961380] [2021-06-05 22:42:17,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:17,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:17,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:17,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:17,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872961380] [2021-06-05 22:42:17,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872961380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:17,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123066388] [2021-06-05 22:42:17,162 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 [2021-06-05 22:42:17,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:42:17,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:17,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:42:17,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:17,322 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 [2021-06-05 22:42:17,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:17,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:17,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:17,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:42:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:17,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123066388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:17,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:17,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:42:17,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275637049] [2021-06-05 22:42:17,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:42:17,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:17,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:42:17,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:42:17,356 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) [2021-06-05 22:42:19,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:19,647 INFO L93 Difference]: Finished difference Result 4390 states and 15566 transitions. [2021-06-05 22:42:19,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 22:42:19,648 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 [2021-06-05 22:42:19,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:19,655 INFO L225 Difference]: With dead ends: 4390 [2021-06-05 22:42:19,655 INFO L226 Difference]: Without dead ends: 4345 [2021-06-05 22:42:19,655 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 1933.4ms TimeCoverageRelationStatistics Valid=1003, Invalid=4399, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 22:42:19,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4345 states. [2021-06-05 22:42:19,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4345 to 3010. [2021-06-05 22:42:19,700 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) [2021-06-05 22:42:19,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 11453 transitions. [2021-06-05 22:42:19,706 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 11453 transitions. Word has length 24 [2021-06-05 22:42:19,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:19,706 INFO L482 AbstractCegarLoop]: Abstraction has 3010 states and 11453 transitions. [2021-06-05 22:42:19,706 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) [2021-06-05 22:42:19,706 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 11453 transitions. [2021-06-05 22:42:19,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:42:19,710 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:19,710 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:19,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-06-05 22:42:19,910 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:42:19,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:19,911 INFO L82 PathProgramCache]: Analyzing trace with hash 487442674, now seen corresponding path program 185 times [2021-06-05 22:42:19,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:19,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687730977] [2021-06-05 22:42:19,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:19,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:20,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:20,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:20,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687730977] [2021-06-05 22:42:20,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687730977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:20,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604020350] [2021-06-05 22:42:20,074 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 [2021-06-05 22:42:20,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:42:20,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:20,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:42:20,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:20,219 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 [2021-06-05 22:42:20,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:20,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:20,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:20,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:42:20,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:20,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604020350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:20,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:20,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:42:20,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592123630] [2021-06-05 22:42:20,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:42:20,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:20,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:42:20,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:42:20,254 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) [2021-06-05 22:42:22,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:22,886 INFO L93 Difference]: Finished difference Result 4523 states and 16142 transitions. [2021-06-05 22:42:22,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 22:42:22,886 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 [2021-06-05 22:42:22,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:22,893 INFO L225 Difference]: With dead ends: 4523 [2021-06-05 22:42:22,893 INFO L226 Difference]: Without dead ends: 4469 [2021-06-05 22:42:22,893 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1903 ImplicationChecksByTransitivity, 2185.1ms TimeCoverageRelationStatistics Valid=1011, Invalid=4539, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 22:42:22,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2021-06-05 22:42:22,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 3113. [2021-06-05 22:42:22,937 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) [2021-06-05 22:42:22,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3113 states to 3113 states and 11904 transitions. [2021-06-05 22:42:22,943 INFO L78 Accepts]: Start accepts. Automaton has 3113 states and 11904 transitions. Word has length 24 [2021-06-05 22:42:22,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:22,943 INFO L482 AbstractCegarLoop]: Abstraction has 3113 states and 11904 transitions. [2021-06-05 22:42:22,943 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) [2021-06-05 22:42:22,943 INFO L276 IsEmpty]: Start isEmpty. Operand 3113 states and 11904 transitions. [2021-06-05 22:42:22,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:42:22,947 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:22,947 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:23,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-05 22:42:23,148 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:42:23,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:23,148 INFO L82 PathProgramCache]: Analyzing trace with hash -380303656, now seen corresponding path program 186 times [2021-06-05 22:42:23,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:23,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862305629] [2021-06-05 22:42:23,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:23,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:23,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:23,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:23,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862305629] [2021-06-05 22:42:23,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862305629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:23,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621795855] [2021-06-05 22:42:23,292 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 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 [2021-06-05 22:42:23,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:42:23,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:23,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:42:23,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:23,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:23,424 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 21 treesize of output 29 [2021-06-05 22:42:23,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:23,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:23,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:23,436 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 22:42:23,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:23,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621795855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:23,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:23,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:42:23,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512287310] [2021-06-05 22:42:23,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:42:23,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:23,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:42:23,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:42:23,527 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) [2021-06-05 22:42:25,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:25,667 INFO L93 Difference]: Finished difference Result 4045 states and 14733 transitions. [2021-06-05 22:42:25,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 22:42:25,667 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 [2021-06-05 22:42:25,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:25,674 INFO L225 Difference]: With dead ends: 4045 [2021-06-05 22:42:25,674 INFO L226 Difference]: Without dead ends: 4036 [2021-06-05 22:42:25,675 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 1750.6ms TimeCoverageRelationStatistics Valid=622, Invalid=3538, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 22:42:25,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4036 states. [2021-06-05 22:42:25,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4036 to 3118. [2021-06-05 22:42:25,718 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) [2021-06-05 22:42:25,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3118 states to 3118 states and 11922 transitions. [2021-06-05 22:42:25,724 INFO L78 Accepts]: Start accepts. Automaton has 3118 states and 11922 transitions. Word has length 24 [2021-06-05 22:42:25,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:25,725 INFO L482 AbstractCegarLoop]: Abstraction has 3118 states and 11922 transitions. [2021-06-05 22:42:25,725 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) [2021-06-05 22:42:25,725 INFO L276 IsEmpty]: Start isEmpty. Operand 3118 states and 11922 transitions. [2021-06-05 22:42:25,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:42:25,729 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:25,729 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:25,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable599,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:25,930 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:42:25,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:25,930 INFO L82 PathProgramCache]: Analyzing trace with hash -56717478, now seen corresponding path program 187 times [2021-06-05 22:42:25,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:25,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644156090] [2021-06-05 22:42:25,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:25,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:26,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:26,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:26,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644156090] [2021-06-05 22:42:26,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644156090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:26,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419753733] [2021-06-05 22:42:26,090 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 [2021-06-05 22:42:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:26,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:42:26,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:26,211 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 [2021-06-05 22:42:26,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:26,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:26,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:26,216 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:42:26,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:26,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419753733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:26,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:26,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:42:26,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808224441] [2021-06-05 22:42:26,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:42:26,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:26,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:42:26,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:42:26,274 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) [2021-06-05 22:42:28,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:28,283 INFO L93 Difference]: Finished difference Result 4078 states and 14822 transitions. [2021-06-05 22:42:28,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 22:42:28,283 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 [2021-06-05 22:42:28,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:28,289 INFO L225 Difference]: With dead ends: 4078 [2021-06-05 22:42:28,290 INFO L226 Difference]: Without dead ends: 4045 [2021-06-05 22:42:28,290 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 1660.5ms TimeCoverageRelationStatistics Valid=633, Invalid=3273, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 22:42:28,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4045 states. [2021-06-05 22:42:28,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4045 to 3135. [2021-06-05 22:42:28,331 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) [2021-06-05 22:42:28,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3135 states to 3135 states and 12003 transitions. [2021-06-05 22:42:28,337 INFO L78 Accepts]: Start accepts. Automaton has 3135 states and 12003 transitions. Word has length 24 [2021-06-05 22:42:28,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:28,337 INFO L482 AbstractCegarLoop]: Abstraction has 3135 states and 12003 transitions. [2021-06-05 22:42:28,337 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) [2021-06-05 22:42:28,337 INFO L276 IsEmpty]: Start isEmpty. Operand 3135 states and 12003 transitions. [2021-06-05 22:42:28,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:42:28,341 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:28,341 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:28,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-06-05 22:42:28,542 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:42:28,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:28,542 INFO L82 PathProgramCache]: Analyzing trace with hash -83226840, now seen corresponding path program 188 times [2021-06-05 22:42:28,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:28,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845769652] [2021-06-05 22:42:28,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:28,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:28,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:28,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:28,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845769652] [2021-06-05 22:42:28,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845769652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:28,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676506198] [2021-06-05 22:42:28,691 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 [2021-06-05 22:42:28,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:42:28,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:28,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:42:28,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:28,824 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:28,824 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 [2021-06-05 22:42:28,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:28,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:28,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:28,836 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 22:42:28,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:28,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676506198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:28,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:28,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:42:28,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758775884] [2021-06-05 22:42:28,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:42:28,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:28,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:42:28,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:42:28,942 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) [2021-06-05 22:42:31,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:31,718 INFO L93 Difference]: Finished difference Result 4435 states and 15824 transitions. [2021-06-05 22:42:31,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 22:42:31,719 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 [2021-06-05 22:42:31,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:31,726 INFO L225 Difference]: With dead ends: 4435 [2021-06-05 22:42:31,726 INFO L226 Difference]: Without dead ends: 4417 [2021-06-05 22:42:31,726 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2110 ImplicationChecksByTransitivity, 2194.3ms TimeCoverageRelationStatistics Valid=869, Invalid=5451, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 22:42:31,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4417 states. [2021-06-05 22:42:31,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4417 to 3143. [2021-06-05 22:42:31,775 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) [2021-06-05 22:42:31,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3143 states to 3143 states and 12037 transitions. [2021-06-05 22:42:31,782 INFO L78 Accepts]: Start accepts. Automaton has 3143 states and 12037 transitions. Word has length 24 [2021-06-05 22:42:31,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:31,782 INFO L482 AbstractCegarLoop]: Abstraction has 3143 states and 12037 transitions. [2021-06-05 22:42:31,782 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) [2021-06-05 22:42:31,782 INFO L276 IsEmpty]: Start isEmpty. Operand 3143 states and 12037 transitions. [2021-06-05 22:42:31,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:42:31,786 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:31,786 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:31,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable602 [2021-06-05 22:42:31,987 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:42:31,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:31,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1874088014, now seen corresponding path program 189 times [2021-06-05 22:42:31,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:31,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589400981] [2021-06-05 22:42:31,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:31,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:32,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:32,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:32,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589400981] [2021-06-05 22:42:32,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589400981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:32,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723014843] [2021-06-05 22:42:32,129 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 [2021-06-05 22:42:32,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:42:32,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:32,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:42:32,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:32,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:32,256 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 [2021-06-05 22:42:32,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:32,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:32,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:32,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 22:42:32,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:32,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723014843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:32,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:32,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:42:32,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148550133] [2021-06-05 22:42:32,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:42:32,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:32,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:42:32,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:42:32,377 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) [2021-06-05 22:42:32,751 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-06-05 22:42:33,066 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-06-05 22:42:34,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:34,967 INFO L93 Difference]: Finished difference Result 4105 states and 14910 transitions. [2021-06-05 22:42:34,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 22:42:34,967 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 [2021-06-05 22:42:34,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:34,974 INFO L225 Difference]: With dead ends: 4105 [2021-06-05 22:42:34,974 INFO L226 Difference]: Without dead ends: 4086 [2021-06-05 22:42:34,974 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 2174.2ms TimeCoverageRelationStatistics Valid=889, Invalid=4963, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 22:42:34,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4086 states. [2021-06-05 22:42:35,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4086 to 3144. [2021-06-05 22:42:35,014 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) [2021-06-05 22:42:35,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3144 states to 3144 states and 12040 transitions. [2021-06-05 22:42:35,020 INFO L78 Accepts]: Start accepts. Automaton has 3144 states and 12040 transitions. Word has length 24 [2021-06-05 22:42:35,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:35,020 INFO L482 AbstractCegarLoop]: Abstraction has 3144 states and 12040 transitions. [2021-06-05 22:42:35,020 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) [2021-06-05 22:42:35,020 INFO L276 IsEmpty]: Start isEmpty. Operand 3144 states and 12040 transitions. [2021-06-05 22:42:35,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:42:35,024 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:35,024 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:35,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable604 [2021-06-05 22:42:35,224 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:42:35,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:35,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1092254214, now seen corresponding path program 190 times [2021-06-05 22:42:35,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:35,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418790172] [2021-06-05 22:42:35,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:35,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:35,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:35,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:35,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418790172] [2021-06-05 22:42:35,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418790172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:35,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176959492] [2021-06-05 22:42:35,396 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 [2021-06-05 22:42:35,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:42:35,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:35,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:42:35,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:35,573 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 [2021-06-05 22:42:35,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:35,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:35,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:35,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:42:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:35,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176959492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:35,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:35,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:42:35,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118027270] [2021-06-05 22:42:35,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:42:35,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:35,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:42:35,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:42:35,635 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) [2021-06-05 22:42:37,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:37,422 INFO L93 Difference]: Finished difference Result 3824 states and 14104 transitions. [2021-06-05 22:42:37,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 22:42:37,422 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 [2021-06-05 22:42:37,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:37,429 INFO L225 Difference]: With dead ends: 3824 [2021-06-05 22:42:37,429 INFO L226 Difference]: Without dead ends: 3811 [2021-06-05 22:42:37,429 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 1553.3ms TimeCoverageRelationStatistics Valid=633, Invalid=3527, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 22:42:37,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3811 states. [2021-06-05 22:42:37,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3811 to 3155. [2021-06-05 22:42:37,470 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) [2021-06-05 22:42:37,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3155 states to 3155 states and 12090 transitions. [2021-06-05 22:42:37,477 INFO L78 Accepts]: Start accepts. Automaton has 3155 states and 12090 transitions. Word has length 24 [2021-06-05 22:42:37,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:37,477 INFO L482 AbstractCegarLoop]: Abstraction has 3155 states and 12090 transitions. [2021-06-05 22:42:37,477 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) [2021-06-05 22:42:37,477 INFO L276 IsEmpty]: Start isEmpty. Operand 3155 states and 12090 transitions. [2021-06-05 22:42:37,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:42:37,481 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:37,481 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:37,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:37,682 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:42:37,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:37,682 INFO L82 PathProgramCache]: Analyzing trace with hash -147198670, now seen corresponding path program 191 times [2021-06-05 22:42:37,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:37,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421949849] [2021-06-05 22:42:37,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:37,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:37,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:37,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421949849] [2021-06-05 22:42:37,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421949849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:37,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642389767] [2021-06-05 22:42:37,826 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 [2021-06-05 22:42:37,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:42:37,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:37,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:42:37,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:37,947 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 [2021-06-05 22:42:37,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:37,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:37,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:37,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:42:38,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:38,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642389767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:38,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:38,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:42:38,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789741914] [2021-06-05 22:42:38,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:42:38,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:38,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:42:38,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:42:38,012 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) [2021-06-05 22:42:38,354 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-06-05 22:42:39,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:39,487 INFO L93 Difference]: Finished difference Result 3946 states and 14542 transitions. [2021-06-05 22:42:39,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 22:42:39,487 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 [2021-06-05 22:42:39,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:39,494 INFO L225 Difference]: With dead ends: 3946 [2021-06-05 22:42:39,494 INFO L226 Difference]: Without dead ends: 3935 [2021-06-05 22:42:39,494 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 1262.7ms TimeCoverageRelationStatistics Valid=476, Invalid=2386, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 22:42:39,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3935 states. [2021-06-05 22:42:39,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3935 to 3159. [2021-06-05 22:42:39,539 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) [2021-06-05 22:42:39,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3159 states to 3159 states and 12105 transitions. [2021-06-05 22:42:39,547 INFO L78 Accepts]: Start accepts. Automaton has 3159 states and 12105 transitions. Word has length 24 [2021-06-05 22:42:39,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:39,547 INFO L482 AbstractCegarLoop]: Abstraction has 3159 states and 12105 transitions. [2021-06-05 22:42:39,547 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) [2021-06-05 22:42:39,547 INFO L276 IsEmpty]: Start isEmpty. Operand 3159 states and 12105 transitions. [2021-06-05 22:42:39,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:42:39,552 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:39,552 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:39,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:39,752 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:42:39,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:39,752 INFO L82 PathProgramCache]: Analyzing trace with hash 832215778, now seen corresponding path program 192 times [2021-06-05 22:42:39,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:39,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928795134] [2021-06-05 22:42:39,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:39,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:39,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:39,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:39,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928795134] [2021-06-05 22:42:39,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928795134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:39,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918634202] [2021-06-05 22:42:39,896 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 [2021-06-05 22:42:39,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:42:39,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:39,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:42:39,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:40,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:40,042 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 [2021-06-05 22:42:40,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:40,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:40,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:40,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 22:42:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:40,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918634202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:40,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:40,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:42:40,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449881369] [2021-06-05 22:42:40,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:42:40,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:40,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:42:40,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:42:40,167 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) [2021-06-05 22:42:40,514 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-06-05 22:42:40,770 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-06-05 22:42:42,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:42,468 INFO L93 Difference]: Finished difference Result 3997 states and 14609 transitions. [2021-06-05 22:42:42,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 22:42:42,468 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 [2021-06-05 22:42:42,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:42,474 INFO L225 Difference]: With dead ends: 3997 [2021-06-05 22:42:42,474 INFO L226 Difference]: Without dead ends: 3979 [2021-06-05 22:42:42,475 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 1927.7ms TimeCoverageRelationStatistics Valid=726, Invalid=3966, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 22:42:42,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3979 states. [2021-06-05 22:42:42,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3979 to 3159. [2021-06-05 22:42:42,515 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) [2021-06-05 22:42:42,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3159 states to 3159 states and 12105 transitions. [2021-06-05 22:42:42,521 INFO L78 Accepts]: Start accepts. Automaton has 3159 states and 12105 transitions. Word has length 24 [2021-06-05 22:42:42,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:42,521 INFO L482 AbstractCegarLoop]: Abstraction has 3159 states and 12105 transitions. [2021-06-05 22:42:42,522 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) [2021-06-05 22:42:42,522 INFO L276 IsEmpty]: Start isEmpty. Operand 3159 states and 12105 transitions. [2021-06-05 22:42:42,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:42:42,526 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:42,526 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:42,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:42,726 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:42:42,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:42,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1741961320, now seen corresponding path program 193 times [2021-06-05 22:42:42,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:42,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365329719] [2021-06-05 22:42:42,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:42,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:42,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:42,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365329719] [2021-06-05 22:42:42,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365329719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:42,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429188295] [2021-06-05 22:42:42,869 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 [2021-06-05 22:42:42,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:42,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:42:42,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:42,991 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 [2021-06-05 22:42:42,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:42,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:42,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:42,996 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:42:43,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:43,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429188295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:43,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:43,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:42:43,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650195570] [2021-06-05 22:42:43,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:42:43,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:43,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:42:43,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:42:43,052 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) [2021-06-05 22:42:44,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:44,463 INFO L93 Difference]: Finished difference Result 3790 states and 14033 transitions. [2021-06-05 22:42:44,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 22:42:44,464 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 [2021-06-05 22:42:44,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:44,470 INFO L225 Difference]: With dead ends: 3790 [2021-06-05 22:42:44,471 INFO L226 Difference]: Without dead ends: 3779 [2021-06-05 22:42:44,471 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1177.6ms TimeCoverageRelationStatistics Valid=476, Invalid=2494, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 22:42:44,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3779 states. [2021-06-05 22:42:44,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3779 to 3156. [2021-06-05 22:42:44,514 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) [2021-06-05 22:42:44,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3156 states to 3156 states and 12096 transitions. [2021-06-05 22:42:44,522 INFO L78 Accepts]: Start accepts. Automaton has 3156 states and 12096 transitions. Word has length 24 [2021-06-05 22:42:44,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:44,522 INFO L482 AbstractCegarLoop]: Abstraction has 3156 states and 12096 transitions. [2021-06-05 22:42:44,522 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) [2021-06-05 22:42:44,522 INFO L276 IsEmpty]: Start isEmpty. Operand 3156 states and 12096 transitions. [2021-06-05 22:42:44,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:42:44,527 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:44,527 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:44,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable612 [2021-06-05 22:42:44,727 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:42:44,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:44,727 INFO L82 PathProgramCache]: Analyzing trace with hash -792728518, now seen corresponding path program 102 times [2021-06-05 22:42:44,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:44,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182205779] [2021-06-05 22:42:44,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:44,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:44,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182205779] [2021-06-05 22:42:44,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182205779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:44,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394909958] [2021-06-05 22:42:44,891 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 [2021-06-05 22:42:44,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:42:44,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:44,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:42:44,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:45,048 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:45,048 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 [2021-06-05 22:42:45,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:45,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:45,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:45,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 22:42:45,124 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:45,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394909958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:45,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:45,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:42:45,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846365844] [2021-06-05 22:42:45,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:42:45,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:45,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:42:45,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:42:45,125 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) [2021-06-05 22:42:48,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:48,216 INFO L93 Difference]: Finished difference Result 4497 states and 16284 transitions. [2021-06-05 22:42:48,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 22:42:48,217 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 [2021-06-05 22:42:48,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:48,224 INFO L225 Difference]: With dead ends: 4497 [2021-06-05 22:42:48,225 INFO L226 Difference]: Without dead ends: 4464 [2021-06-05 22:42:48,225 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2509 ImplicationChecksByTransitivity, 2632.5ms TimeCoverageRelationStatistics Valid=1071, Invalid=6069, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 22:42:48,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4464 states. [2021-06-05 22:42:48,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4464 to 3272. [2021-06-05 22:42:48,275 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) [2021-06-05 22:42:48,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3272 states to 3272 states and 12598 transitions. [2021-06-05 22:42:48,282 INFO L78 Accepts]: Start accepts. Automaton has 3272 states and 12598 transitions. Word has length 24 [2021-06-05 22:42:48,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:48,283 INFO L482 AbstractCegarLoop]: Abstraction has 3272 states and 12598 transitions. [2021-06-05 22:42:48,283 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) [2021-06-05 22:42:48,283 INFO L276 IsEmpty]: Start isEmpty. Operand 3272 states and 12598 transitions. [2021-06-05 22:42:48,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:42:48,288 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:48,288 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:48,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-06-05 22:42:48,488 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:42:48,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:48,489 INFO L82 PathProgramCache]: Analyzing trace with hash -997646652, now seen corresponding path program 194 times [2021-06-05 22:42:48,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:48,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109096038] [2021-06-05 22:42:48,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:48,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:48,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:48,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:48,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109096038] [2021-06-05 22:42:48,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109096038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:48,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180698332] [2021-06-05 22:42:48,661 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 [2021-06-05 22:42:48,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:42:48,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:48,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:42:48,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:48,835 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:48,835 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 [2021-06-05 22:42:48,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:48,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:48,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:48,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 22:42:48,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:48,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180698332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:48,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:48,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:42:48,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558496010] [2021-06-05 22:42:48,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:42:48,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:48,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:42:48,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:42:48,899 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) [2021-06-05 22:42:51,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:51,494 INFO L93 Difference]: Finished difference Result 4691 states and 16892 transitions. [2021-06-05 22:42:51,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 22:42:51,494 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 [2021-06-05 22:42:51,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:51,502 INFO L225 Difference]: With dead ends: 4691 [2021-06-05 22:42:51,502 INFO L226 Difference]: Without dead ends: 4635 [2021-06-05 22:42:51,502 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2065 ImplicationChecksByTransitivity, 2230.4ms TimeCoverageRelationStatistics Valid=1006, Invalid=5000, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 22:42:51,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4635 states. [2021-06-05 22:42:51,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4635 to 3315. [2021-06-05 22:42:51,550 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) [2021-06-05 22:42:51,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 12792 transitions. [2021-06-05 22:42:51,557 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 12792 transitions. Word has length 24 [2021-06-05 22:42:51,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:51,557 INFO L482 AbstractCegarLoop]: Abstraction has 3315 states and 12792 transitions. [2021-06-05 22:42:51,557 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) [2021-06-05 22:42:51,557 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 12792 transitions. [2021-06-05 22:42:51,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:42:51,561 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:51,561 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:51,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable615,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:51,762 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:42:51,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:51,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1420132378, now seen corresponding path program 195 times [2021-06-05 22:42:51,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:51,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708740164] [2021-06-05 22:42:51,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:51,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:51,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:51,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:51,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708740164] [2021-06-05 22:42:51,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708740164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:51,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227225273] [2021-06-05 22:42:51,921 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 [2021-06-05 22:42:51,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:42:51,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:51,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:42:51,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:52,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:42:52,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:52,082 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 [2021-06-05 22:42:52,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:52,157 INFO L628 ElimStorePlain]: treesize reduction 43, result has 56.6 percent of original size [2021-06-05 22:42:52,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:52,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:56 [2021-06-05 22:42:52,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:52,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227225273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:52,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:52,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 22:42:52,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192913817] [2021-06-05 22:42:52,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:42:52,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:52,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:42:52,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:42:52,339 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) [2021-06-05 22:42:52,918 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2021-06-05 22:42:54,345 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-06-05 22:42:55,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:55,555 INFO L93 Difference]: Finished difference Result 4283 states and 15736 transitions. [2021-06-05 22:42:55,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 22:42:55,555 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 [2021-06-05 22:42:55,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:55,563 INFO L225 Difference]: With dead ends: 4283 [2021-06-05 22:42:55,563 INFO L226 Difference]: Without dead ends: 4266 [2021-06-05 22:42:55,564 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2141 ImplicationChecksByTransitivity, 2868.8ms TimeCoverageRelationStatistics Valid=891, Invalid=5429, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 22:42:55,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4266 states. [2021-06-05 22:42:55,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4266 to 3331. [2021-06-05 22:42:55,612 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) [2021-06-05 22:42:55,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3331 states to 3331 states and 12864 transitions. [2021-06-05 22:42:55,640 INFO L78 Accepts]: Start accepts. Automaton has 3331 states and 12864 transitions. Word has length 24 [2021-06-05 22:42:55,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:55,640 INFO L482 AbstractCegarLoop]: Abstraction has 3331 states and 12864 transitions. [2021-06-05 22:42:55,640 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) [2021-06-05 22:42:55,640 INFO L276 IsEmpty]: Start isEmpty. Operand 3331 states and 12864 transitions. [2021-06-05 22:42:55,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:42:55,646 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:55,646 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:55,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable617,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:55,846 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:42:55,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:55,846 INFO L82 PathProgramCache]: Analyzing trace with hash 265611744, now seen corresponding path program 196 times [2021-06-05 22:42:55,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:55,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569073827] [2021-06-05 22:42:55,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:55,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:55,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:55,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:55,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569073827] [2021-06-05 22:42:55,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569073827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:55,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992728033] [2021-06-05 22:42:55,996 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 [2021-06-05 22:42:56,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:42:56,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:56,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:42:56,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:56,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-05 22:42:56,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:56,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:56,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:56,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 22:42:56,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:56,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992728033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:56,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:56,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:42:56,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428056448] [2021-06-05 22:42:56,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:42:56,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:56,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:42:56,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:42:56,182 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) [2021-06-05 22:42:58,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:42:58,337 INFO L93 Difference]: Finished difference Result 4180 states and 15490 transitions. [2021-06-05 22:42:58,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 22:42:58,337 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 [2021-06-05 22:42:58,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:42:58,345 INFO L225 Difference]: With dead ends: 4180 [2021-06-05 22:42:58,345 INFO L226 Difference]: Without dead ends: 4165 [2021-06-05 22:42:58,345 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1633 ImplicationChecksByTransitivity, 1776.1ms TimeCoverageRelationStatistics Valid=759, Invalid=3933, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 22:42:58,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4165 states. [2021-06-05 22:42:58,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4165 to 3335. [2021-06-05 22:42:58,391 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) [2021-06-05 22:42:58,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3335 states to 3335 states and 12879 transitions. [2021-06-05 22:42:58,398 INFO L78 Accepts]: Start accepts. Automaton has 3335 states and 12879 transitions. Word has length 24 [2021-06-05 22:42:58,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:42:58,398 INFO L482 AbstractCegarLoop]: Abstraction has 3335 states and 12879 transitions. [2021-06-05 22:42:58,398 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) [2021-06-05 22:42:58,398 INFO L276 IsEmpty]: Start isEmpty. Operand 3335 states and 12879 transitions. [2021-06-05 22:42:58,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:42:58,403 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:42:58,403 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:42:58,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:42:58,605 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:42:58,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:42:58,605 INFO L82 PathProgramCache]: Analyzing trace with hash -440717930, now seen corresponding path program 197 times [2021-06-05 22:42:58,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:42:58,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079186337] [2021-06-05 22:42:58,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:42:58,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:42:58,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:58,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:42:58,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079186337] [2021-06-05 22:42:58,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079186337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:58,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527743961] [2021-06-05 22:42:58,760 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 [2021-06-05 22:42:58,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:42:58,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:42:58,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:42:58,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:42:58,896 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 [2021-06-05 22:42:58,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:42:58,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:42:58,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:42:58,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 22:42:58,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:42:58,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527743961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:42:58,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:42:58,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:42:58,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504631122] [2021-06-05 22:42:58,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:42:58,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:42:58,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:42:58,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:42:58,949 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) [2021-06-05 22:43:01,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:01,873 INFO L93 Difference]: Finished difference Result 4826 states and 17391 transitions. [2021-06-05 22:43:01,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 22:43:01,873 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 [2021-06-05 22:43:01,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:01,881 INFO L225 Difference]: With dead ends: 4826 [2021-06-05 22:43:01,881 INFO L226 Difference]: Without dead ends: 4795 [2021-06-05 22:43:01,882 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2712 ImplicationChecksByTransitivity, 2431.7ms TimeCoverageRelationStatistics Valid=1159, Invalid=6323, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 22:43:01,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4795 states. [2021-06-05 22:43:01,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4795 to 3365. [2021-06-05 22:43:01,935 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) [2021-06-05 22:43:01,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3365 states to 3365 states and 13015 transitions. [2021-06-05 22:43:01,942 INFO L78 Accepts]: Start accepts. Automaton has 3365 states and 13015 transitions. Word has length 24 [2021-06-05 22:43:01,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:01,942 INFO L482 AbstractCegarLoop]: Abstraction has 3365 states and 13015 transitions. [2021-06-05 22:43:01,942 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) [2021-06-05 22:43:01,942 INFO L276 IsEmpty]: Start isEmpty. Operand 3365 states and 13015 transitions. [2021-06-05 22:43:01,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:43:01,947 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:01,947 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:02,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:02,148 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:43:02,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:02,148 INFO L82 PathProgramCache]: Analyzing trace with hash -968550830, now seen corresponding path program 198 times [2021-06-05 22:43:02,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:02,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591166796] [2021-06-05 22:43:02,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:02,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:02,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:02,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:02,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591166796] [2021-06-05 22:43:02,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591166796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:02,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153251327] [2021-06-05 22:43:02,328 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 [2021-06-05 22:43:02,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:43:02,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:02,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:43:02,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:02,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:02,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:02,563 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:02,564 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 33 treesize of output 53 [2021-06-05 22:43:02,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:02,593 INFO L628 ElimStorePlain]: treesize reduction 16, result has 69.2 percent of original size [2021-06-05 22:43:02,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:02,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:41 [2021-06-05 22:43:02,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:02,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153251327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:02,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:02,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:43:02,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957427992] [2021-06-05 22:43:02,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:43:02,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:02,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:43:02,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:43:02,684 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) [2021-06-05 22:43:05,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:05,675 INFO L93 Difference]: Finished difference Result 4795 states and 17888 transitions. [2021-06-05 22:43:05,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 22:43:05,676 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 [2021-06-05 22:43:05,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:05,685 INFO L225 Difference]: With dead ends: 4795 [2021-06-05 22:43:05,685 INFO L226 Difference]: Without dead ends: 4786 [2021-06-05 22:43:05,685 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 2386.1ms TimeCoverageRelationStatistics Valid=651, Invalid=3771, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 22:43:05,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4786 states. [2021-06-05 22:43:05,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4786 to 3369. [2021-06-05 22:43:05,740 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) [2021-06-05 22:43:05,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3369 states to 3369 states and 13033 transitions. [2021-06-05 22:43:05,748 INFO L78 Accepts]: Start accepts. Automaton has 3369 states and 13033 transitions. Word has length 24 [2021-06-05 22:43:05,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:05,748 INFO L482 AbstractCegarLoop]: Abstraction has 3369 states and 13033 transitions. [2021-06-05 22:43:05,748 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) [2021-06-05 22:43:05,748 INFO L276 IsEmpty]: Start isEmpty. Operand 3369 states and 13033 transitions. [2021-06-05 22:43:05,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:43:05,754 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:05,754 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:05,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable627 [2021-06-05 22:43:05,954 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:43:05,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:05,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1478066694, now seen corresponding path program 199 times [2021-06-05 22:43:05,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:05,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599071267] [2021-06-05 22:43:05,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:05,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:06,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:06,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:06,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599071267] [2021-06-05 22:43:06,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599071267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:06,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767486968] [2021-06-05 22:43:06,170 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 [2021-06-05 22:43:06,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:06,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:43:06,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:06,348 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 20 treesize of output 12 [2021-06-05 22:43:06,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:06,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:06,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:06,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 22:43:06,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:06,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767486968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:06,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:06,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:43:06,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301802254] [2021-06-05 22:43:06,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:43:06,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:06,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:43:06,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:43:06,379 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) [2021-06-05 22:43:07,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:07,685 INFO L93 Difference]: Finished difference Result 4091 states and 15410 transitions. [2021-06-05 22:43:07,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:43:07,685 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 [2021-06-05 22:43:07,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:07,692 INFO L225 Difference]: With dead ends: 4091 [2021-06-05 22:43:07,692 INFO L226 Difference]: Without dead ends: 4082 [2021-06-05 22:43:07,692 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 978.9ms TimeCoverageRelationStatistics Valid=313, Invalid=1943, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:43:07,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2021-06-05 22:43:07,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 3374. [2021-06-05 22:43:07,732 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) [2021-06-05 22:43:07,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3374 states to 3374 states and 13049 transitions. [2021-06-05 22:43:07,739 INFO L78 Accepts]: Start accepts. Automaton has 3374 states and 13049 transitions. Word has length 24 [2021-06-05 22:43:07,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:07,739 INFO L482 AbstractCegarLoop]: Abstraction has 3374 states and 13049 transitions. [2021-06-05 22:43:07,739 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) [2021-06-05 22:43:07,739 INFO L276 IsEmpty]: Start isEmpty. Operand 3374 states and 13049 transitions. [2021-06-05 22:43:07,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:43:07,743 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:07,743 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:07,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable633,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:07,944 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:43:07,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:07,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1687604074, now seen corresponding path program 200 times [2021-06-05 22:43:07,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:07,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449318065] [2021-06-05 22:43:07,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:08,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:08,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:08,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449318065] [2021-06-05 22:43:08,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449318065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:08,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024540073] [2021-06-05 22:43:08,133 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 [2021-06-05 22:43:08,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:43:08,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:08,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:43:08,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:08,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:08,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:08,340 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:08,340 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 [2021-06-05 22:43:08,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:43:08,379 INFO L628 ElimStorePlain]: treesize reduction 25, result has 46.8 percent of original size [2021-06-05 22:43:08,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:08,380 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-06-05 22:43:08,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:08,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024540073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:08,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:08,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:43:08,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290101968] [2021-06-05 22:43:08,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:43:08,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:08,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:43:08,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:43:08,441 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) [2021-06-05 22:43:09,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:09,838 INFO L93 Difference]: Finished difference Result 3999 states and 15033 transitions. [2021-06-05 22:43:09,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 22:43:09,838 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 [2021-06-05 22:43:09,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:09,845 INFO L225 Difference]: With dead ends: 3999 [2021-06-05 22:43:09,846 INFO L226 Difference]: Without dead ends: 3981 [2021-06-05 22:43:09,846 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1129.5ms TimeCoverageRelationStatistics Valid=400, Invalid=2462, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 22:43:09,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3981 states. [2021-06-05 22:43:09,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3981 to 3388. [2021-06-05 22:43:09,894 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) [2021-06-05 22:43:09,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 13096 transitions. [2021-06-05 22:43:09,901 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 13096 transitions. Word has length 24 [2021-06-05 22:43:09,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:09,902 INFO L482 AbstractCegarLoop]: Abstraction has 3388 states and 13096 transitions. [2021-06-05 22:43:09,902 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) [2021-06-05 22:43:09,902 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 13096 transitions. [2021-06-05 22:43:09,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:43:09,907 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:09,907 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:10,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable634 [2021-06-05 22:43:10,107 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:43:10,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:10,108 INFO L82 PathProgramCache]: Analyzing trace with hash 41067672, now seen corresponding path program 201 times [2021-06-05 22:43:10,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:10,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618394930] [2021-06-05 22:43:10,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:10,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:10,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:10,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:10,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618394930] [2021-06-05 22:43:10,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618394930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:10,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768678890] [2021-06-05 22:43:10,304 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 [2021-06-05 22:43:10,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:43:10,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:10,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:43:10,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:10,469 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:10,469 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 [2021-06-05 22:43:10,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:10,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:10,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:10,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 22:43:10,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:10,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768678890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:10,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:10,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:43:10,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032455067] [2021-06-05 22:43:10,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:43:10,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:10,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:43:10,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:43:10,556 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) [2021-06-05 22:43:12,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:12,685 INFO L93 Difference]: Finished difference Result 4200 states and 15720 transitions. [2021-06-05 22:43:12,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 22:43:12,686 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 [2021-06-05 22:43:12,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:12,692 INFO L225 Difference]: With dead ends: 4200 [2021-06-05 22:43:12,692 INFO L226 Difference]: Without dead ends: 4181 [2021-06-05 22:43:12,692 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1607.8ms TimeCoverageRelationStatistics Valid=485, Invalid=3055, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 22:43:12,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2021-06-05 22:43:12,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 3383. [2021-06-05 22:43:12,731 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) [2021-06-05 22:43:12,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3383 states to 3383 states and 13082 transitions. [2021-06-05 22:43:12,737 INFO L78 Accepts]: Start accepts. Automaton has 3383 states and 13082 transitions. Word has length 24 [2021-06-05 22:43:12,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:12,737 INFO L482 AbstractCegarLoop]: Abstraction has 3383 states and 13082 transitions. [2021-06-05 22:43:12,738 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) [2021-06-05 22:43:12,738 INFO L276 IsEmpty]: Start isEmpty. Operand 3383 states and 13082 transitions. [2021-06-05 22:43:12,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:43:12,742 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:12,742 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:12,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable638,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:12,942 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:43:12,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:12,943 INFO L82 PathProgramCache]: Analyzing trace with hash -987082188, now seen corresponding path program 202 times [2021-06-05 22:43:12,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:12,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295629972] [2021-06-05 22:43:12,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:13,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:13,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:13,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295629972] [2021-06-05 22:43:13,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295629972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:13,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022977557] [2021-06-05 22:43:13,106 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 [2021-06-05 22:43:13,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:43:13,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:13,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:43:13,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:13,237 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 [2021-06-05 22:43:13,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:13,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:13,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:13,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:43:13,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:13,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022977557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:13,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:13,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:43:13,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129267094] [2021-06-05 22:43:13,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:43:13,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:13,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:43:13,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:43:13,282 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) [2021-06-05 22:43:14,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:14,275 INFO L93 Difference]: Finished difference Result 4061 states and 15309 transitions. [2021-06-05 22:43:14,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:43:14,275 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 [2021-06-05 22:43:14,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:14,282 INFO L225 Difference]: With dead ends: 4061 [2021-06-05 22:43:14,282 INFO L226 Difference]: Without dead ends: 4052 [2021-06-05 22:43:14,282 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 849.2ms TimeCoverageRelationStatistics Valid=279, Invalid=1613, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:43:14,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4052 states. [2021-06-05 22:43:14,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4052 to 3392. [2021-06-05 22:43:14,323 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) [2021-06-05 22:43:14,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3392 states to 3392 states and 13110 transitions. [2021-06-05 22:43:14,330 INFO L78 Accepts]: Start accepts. Automaton has 3392 states and 13110 transitions. Word has length 24 [2021-06-05 22:43:14,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:14,330 INFO L482 AbstractCegarLoop]: Abstraction has 3392 states and 13110 transitions. [2021-06-05 22:43:14,330 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) [2021-06-05 22:43:14,330 INFO L276 IsEmpty]: Start isEmpty. Operand 3392 states and 13110 transitions. [2021-06-05 22:43:14,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:43:14,334 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:14,334 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:14,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable641,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:14,535 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:43:14,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:14,535 INFO L82 PathProgramCache]: Analyzing trace with hash -663496010, now seen corresponding path program 203 times [2021-06-05 22:43:14,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:14,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972688589] [2021-06-05 22:43:14,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:14,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:14,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:14,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:14,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972688589] [2021-06-05 22:43:14,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972688589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:14,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218823999] [2021-06-05 22:43:14,706 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 [2021-06-05 22:43:14,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:43:14,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:14,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:43:14,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:14,840 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 [2021-06-05 22:43:14,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:14,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:14,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:14,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:43:14,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:14,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218823999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:14,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:14,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:43:14,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208033538] [2021-06-05 22:43:14,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:43:14,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:14,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:43:14,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:43:14,913 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) [2021-06-05 22:43:16,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:16,009 INFO L93 Difference]: Finished difference Result 4052 states and 15285 transitions. [2021-06-05 22:43:16,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:43:16,009 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 [2021-06-05 22:43:16,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:16,016 INFO L225 Difference]: With dead ends: 4052 [2021-06-05 22:43:16,017 INFO L226 Difference]: Without dead ends: 4041 [2021-06-05 22:43:16,017 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 905.6ms TimeCoverageRelationStatistics Valid=282, Invalid=1880, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:43:16,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4041 states. [2021-06-05 22:43:16,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4041 to 3382. [2021-06-05 22:43:16,063 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) [2021-06-05 22:43:16,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3382 states to 3382 states and 13078 transitions. [2021-06-05 22:43:16,070 INFO L78 Accepts]: Start accepts. Automaton has 3382 states and 13078 transitions. Word has length 24 [2021-06-05 22:43:16,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:16,070 INFO L482 AbstractCegarLoop]: Abstraction has 3382 states and 13078 transitions. [2021-06-05 22:43:16,070 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) [2021-06-05 22:43:16,070 INFO L276 IsEmpty]: Start isEmpty. Operand 3382 states and 13078 transitions. [2021-06-05 22:43:16,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:43:16,075 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:16,075 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:16,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable642 [2021-06-05 22:43:16,276 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:43:16,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:16,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1788704418, now seen corresponding path program 204 times [2021-06-05 22:43:16,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:16,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963259300] [2021-06-05 22:43:16,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:16,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:16,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:16,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963259300] [2021-06-05 22:43:16,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963259300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:16,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724736970] [2021-06-05 22:43:16,457 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 [2021-06-05 22:43:16,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:43:16,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:16,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:43:16,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:16,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:16,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:16,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:16,685 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 [2021-06-05 22:43:16,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:16,716 INFO L628 ElimStorePlain]: treesize reduction 16, result has 69.2 percent of original size [2021-06-05 22:43:16,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:16,718 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:41 [2021-06-05 22:43:16,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:16,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724736970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:16,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:16,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:43:16,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239739057] [2021-06-05 22:43:16,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:43:16,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:16,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:43:16,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:43:16,793 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) [2021-06-05 22:43:24,196 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-06-05 22:43:24,515 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-06-05 22:43:24,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:24,599 INFO L93 Difference]: Finished difference Result 6012 states and 21882 transitions. [2021-06-05 22:43:24,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 22:43:24,599 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 [2021-06-05 22:43:24,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:24,609 INFO L225 Difference]: With dead ends: 6012 [2021-06-05 22:43:24,609 INFO L226 Difference]: Without dead ends: 5983 [2021-06-05 22:43:24,610 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2708 ImplicationChecksByTransitivity, 4701.8ms TimeCoverageRelationStatistics Valid=1268, Invalid=6742, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 22:43:24,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5983 states. [2021-06-05 22:43:24,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5983 to 3413. [2021-06-05 22:43:24,667 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) [2021-06-05 22:43:24,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 13208 transitions. [2021-06-05 22:43:24,675 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 13208 transitions. Word has length 24 [2021-06-05 22:43:24,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:24,675 INFO L482 AbstractCegarLoop]: Abstraction has 3413 states and 13208 transitions. [2021-06-05 22:43:24,675 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) [2021-06-05 22:43:24,675 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 13208 transitions. [2021-06-05 22:43:24,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:43:24,680 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:24,680 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:24,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable643,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:24,881 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:43:24,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:24,881 INFO L82 PathProgramCache]: Analyzing trace with hash -52244372, now seen corresponding path program 205 times [2021-06-05 22:43:24,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:24,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31936754] [2021-06-05 22:43:24,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:24,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:25,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:25,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:25,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31936754] [2021-06-05 22:43:25,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31936754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:25,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607581297] [2021-06-05 22:43:25,090 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 [2021-06-05 22:43:25,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:25,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:43:25,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:25,257 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 [2021-06-05 22:43:25,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:25,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:25,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:25,259 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:43:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:25,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607581297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:25,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:25,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:43:25,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621702262] [2021-06-05 22:43:25,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:43:25,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:25,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:43:25,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:43:25,288 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) [2021-06-05 22:43:27,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:27,527 INFO L93 Difference]: Finished difference Result 4406 states and 16378 transitions. [2021-06-05 22:43:27,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 22:43:27,527 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 [2021-06-05 22:43:27,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:27,534 INFO L225 Difference]: With dead ends: 4406 [2021-06-05 22:43:27,535 INFO L226 Difference]: Without dead ends: 4388 [2021-06-05 22:43:27,535 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 1636.4ms TimeCoverageRelationStatistics Valid=535, Invalid=3371, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 22:43:27,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4388 states. [2021-06-05 22:43:27,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4388 to 3416. [2021-06-05 22:43:27,581 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) [2021-06-05 22:43:27,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3416 states to 3416 states and 13216 transitions. [2021-06-05 22:43:27,588 INFO L78 Accepts]: Start accepts. Automaton has 3416 states and 13216 transitions. Word has length 24 [2021-06-05 22:43:27,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:27,588 INFO L482 AbstractCegarLoop]: Abstraction has 3416 states and 13216 transitions. [2021-06-05 22:43:27,589 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) [2021-06-05 22:43:27,589 INFO L276 IsEmpty]: Start isEmpty. Operand 3416 states and 13216 transitions. [2021-06-05 22:43:27,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:43:27,593 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:27,593 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:27,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable650 [2021-06-05 22:43:27,794 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:43:27,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:27,794 INFO L82 PathProgramCache]: Analyzing trace with hash 2090131316, now seen corresponding path program 206 times [2021-06-05 22:43:27,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:27,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846352738] [2021-06-05 22:43:27,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:27,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:27,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:27,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:27,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846352738] [2021-06-05 22:43:27,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846352738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:27,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353970904] [2021-06-05 22:43:27,981 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 [2021-06-05 22:43:28,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:43:28,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:28,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:43:28,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:28,155 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:28,156 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 [2021-06-05 22:43:28,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:28,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:28,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:28,165 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 22:43:28,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:28,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353970904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:28,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:28,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:43:28,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559906228] [2021-06-05 22:43:28,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:43:28,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:28,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:43:28,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:43:28,227 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) [2021-06-05 22:43:30,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:30,638 INFO L93 Difference]: Finished difference Result 4399 states and 16319 transitions. [2021-06-05 22:43:30,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 22:43:30,638 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 [2021-06-05 22:43:30,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:30,646 INFO L225 Difference]: With dead ends: 4399 [2021-06-05 22:43:30,646 INFO L226 Difference]: Without dead ends: 4370 [2021-06-05 22:43:30,646 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2011.5ms TimeCoverageRelationStatistics Valid=553, Invalid=3107, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 22:43:30,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4370 states. [2021-06-05 22:43:30,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4370 to 3419. [2021-06-05 22:43:30,693 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) [2021-06-05 22:43:30,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3419 states to 3419 states and 13224 transitions. [2021-06-05 22:43:30,700 INFO L78 Accepts]: Start accepts. Automaton has 3419 states and 13224 transitions. Word has length 24 [2021-06-05 22:43:30,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:30,700 INFO L482 AbstractCegarLoop]: Abstraction has 3419 states and 13224 transitions. [2021-06-05 22:43:30,700 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) [2021-06-05 22:43:30,700 INFO L276 IsEmpty]: Start isEmpty. Operand 3419 states and 13224 transitions. [2021-06-05 22:43:30,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:43:30,705 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:30,705 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:30,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable651 [2021-06-05 22:43:30,906 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:43:30,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:30,906 INFO L82 PathProgramCache]: Analyzing trace with hash -268592468, now seen corresponding path program 207 times [2021-06-05 22:43:30,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:30,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289312730] [2021-06-05 22:43:30,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:30,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:31,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:31,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:31,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289312730] [2021-06-05 22:43:31,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289312730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:31,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029381146] [2021-06-05 22:43:31,108 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 [2021-06-05 22:43:31,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:43:31,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:31,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:43:31,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:31,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:31,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:31,336 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 [2021-06-05 22:43:31,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:31,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:31,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:31,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 22:43:31,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:31,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029381146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:31,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:31,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:43:31,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293833119] [2021-06-05 22:43:31,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:43:31,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:31,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:43:31,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:43:31,369 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) [2021-06-05 22:43:33,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:33,453 INFO L93 Difference]: Finished difference Result 4271 states and 15932 transitions. [2021-06-05 22:43:33,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 22:43:33,453 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 [2021-06-05 22:43:33,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:33,460 INFO L225 Difference]: With dead ends: 4271 [2021-06-05 22:43:33,460 INFO L226 Difference]: Without dead ends: 4242 [2021-06-05 22:43:33,460 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1646.6ms TimeCoverageRelationStatistics Valid=505, Invalid=3035, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 22:43:33,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4242 states. [2021-06-05 22:43:33,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4242 to 3415. [2021-06-05 22:43:33,503 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) [2021-06-05 22:43:33,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3415 states to 3415 states and 13216 transitions. [2021-06-05 22:43:33,510 INFO L78 Accepts]: Start accepts. Automaton has 3415 states and 13216 transitions. Word has length 24 [2021-06-05 22:43:33,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:33,510 INFO L482 AbstractCegarLoop]: Abstraction has 3415 states and 13216 transitions. [2021-06-05 22:43:33,510 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) [2021-06-05 22:43:33,510 INFO L276 IsEmpty]: Start isEmpty. Operand 3415 states and 13216 transitions. [2021-06-05 22:43:33,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:43:33,514 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:33,514 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:33,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable654 [2021-06-05 22:43:33,715 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:43:33,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:33,715 INFO L82 PathProgramCache]: Analyzing trace with hash -445133900, now seen corresponding path program 208 times [2021-06-05 22:43:33,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:33,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301347164] [2021-06-05 22:43:33,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:33,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:33,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:33,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:33,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301347164] [2021-06-05 22:43:33,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301347164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:33,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239613441] [2021-06-05 22:43:33,887 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 [2021-06-05 22:43:33,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:43:33,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:33,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:43:33,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:34,028 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 [2021-06-05 22:43:34,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:34,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:34,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:34,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:43:34,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:34,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239613441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:34,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:34,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:43:34,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963594437] [2021-06-05 22:43:34,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:43:34,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:34,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:43:34,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:43:34,076 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) [2021-06-05 22:43:35,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:35,032 INFO L93 Difference]: Finished difference Result 4098 states and 15416 transitions. [2021-06-05 22:43:35,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:43:35,032 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 [2021-06-05 22:43:35,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:35,039 INFO L225 Difference]: With dead ends: 4098 [2021-06-05 22:43:35,040 INFO L226 Difference]: Without dead ends: 4089 [2021-06-05 22:43:35,040 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 807.8ms TimeCoverageRelationStatistics Valid=276, Invalid=1364, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:43:35,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4089 states. [2021-06-05 22:43:35,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4089 to 3420. [2021-06-05 22:43:35,084 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) [2021-06-05 22:43:35,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3420 states to 3420 states and 13230 transitions. [2021-06-05 22:43:35,092 INFO L78 Accepts]: Start accepts. Automaton has 3420 states and 13230 transitions. Word has length 24 [2021-06-05 22:43:35,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:35,092 INFO L482 AbstractCegarLoop]: Abstraction has 3420 states and 13230 transitions. [2021-06-05 22:43:35,092 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) [2021-06-05 22:43:35,092 INFO L276 IsEmpty]: Start isEmpty. Operand 3420 states and 13230 transitions. [2021-06-05 22:43:35,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:43:35,097 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:35,098 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:35,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable655,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:35,314 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:43:35,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:35,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1278872340, now seen corresponding path program 209 times [2021-06-05 22:43:35,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:35,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159361373] [2021-06-05 22:43:35,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:35,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:35,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:35,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:35,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159361373] [2021-06-05 22:43:35,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159361373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:35,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078120755] [2021-06-05 22:43:35,513 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 [2021-06-05 22:43:35,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:43:35,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:35,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:43:35,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:35,664 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 [2021-06-05 22:43:35,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:35,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:35,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:35,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:43:35,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:35,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078120755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:35,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:35,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:43:35,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194783713] [2021-06-05 22:43:35,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:43:35,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:35,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:43:35,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:43:35,719 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) [2021-06-05 22:43:36,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:36,786 INFO L93 Difference]: Finished difference Result 4071 states and 15334 transitions. [2021-06-05 22:43:36,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:43:36,787 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 [2021-06-05 22:43:36,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:36,794 INFO L225 Difference]: With dead ends: 4071 [2021-06-05 22:43:36,794 INFO L226 Difference]: Without dead ends: 4061 [2021-06-05 22:43:36,794 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 909.5ms TimeCoverageRelationStatistics Valid=272, Invalid=1450, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:43:36,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4061 states. [2021-06-05 22:43:36,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4061 to 3413. [2021-06-05 22:43:36,841 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) [2021-06-05 22:43:36,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 13208 transitions. [2021-06-05 22:43:36,849 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 13208 transitions. Word has length 24 [2021-06-05 22:43:36,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:36,849 INFO L482 AbstractCegarLoop]: Abstraction has 3413 states and 13208 transitions. [2021-06-05 22:43:36,849 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) [2021-06-05 22:43:36,849 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 13208 transitions. [2021-06-05 22:43:36,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:43:36,854 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:36,854 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:37,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable656 [2021-06-05 22:43:37,055 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:43:37,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:37,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1156910420, now seen corresponding path program 210 times [2021-06-05 22:43:37,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:37,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084500970] [2021-06-05 22:43:37,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:37,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:37,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:37,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:37,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084500970] [2021-06-05 22:43:37,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084500970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:37,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64599127] [2021-06-05 22:43:37,257 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 [2021-06-05 22:43:37,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:43:37,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:37,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:43:37,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:37,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:37,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:37,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:37,498 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 [2021-06-05 22:43:37,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:37,535 INFO L628 ElimStorePlain]: treesize reduction 46, result has 43.9 percent of original size [2021-06-05 22:43:37,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:37,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:41 [2021-06-05 22:43:37,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:37,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64599127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:37,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:37,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:43:37,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101532145] [2021-06-05 22:43:37,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:43:37,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:37,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:43:37,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:43:37,618 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) [2021-06-05 22:43:38,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:38,805 INFO L93 Difference]: Finished difference Result 3889 states and 14696 transitions. [2021-06-05 22:43:38,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:43:38,805 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 [2021-06-05 22:43:38,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:38,813 INFO L225 Difference]: With dead ends: 3889 [2021-06-05 22:43:38,813 INFO L226 Difference]: Without dead ends: 3880 [2021-06-05 22:43:38,813 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1045.2ms TimeCoverageRelationStatistics Valid=361, Invalid=1445, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:43:38,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3880 states. [2021-06-05 22:43:38,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3880 to 3413. [2021-06-05 22:43:38,861 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) [2021-06-05 22:43:38,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 13208 transitions. [2021-06-05 22:43:38,869 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 13208 transitions. Word has length 24 [2021-06-05 22:43:38,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:38,869 INFO L482 AbstractCegarLoop]: Abstraction has 3413 states and 13208 transitions. [2021-06-05 22:43:38,869 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) [2021-06-05 22:43:38,869 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 13208 transitions. [2021-06-05 22:43:38,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:43:38,874 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:38,875 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:39,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable657,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:39,075 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:43:39,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:39,075 INFO L82 PathProgramCache]: Analyzing trace with hash 362223946, now seen corresponding path program 211 times [2021-06-05 22:43:39,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:39,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368264468] [2021-06-05 22:43:39,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:39,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:39,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:39,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368264468] [2021-06-05 22:43:39,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368264468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:39,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266613118] [2021-06-05 22:43:39,263 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 [2021-06-05 22:43:39,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:39,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:43:39,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:39,423 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 [2021-06-05 22:43:39,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:39,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:39,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:39,426 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:43:39,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:39,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266613118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:39,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:39,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:43:39,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566284082] [2021-06-05 22:43:39,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:43:39,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:39,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:43:39,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:43:39,453 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) [2021-06-05 22:43:40,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:40,615 INFO L93 Difference]: Finished difference Result 3907 states and 14738 transitions. [2021-06-05 22:43:40,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:43:40,615 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 [2021-06-05 22:43:40,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:40,621 INFO L225 Difference]: With dead ends: 3907 [2021-06-05 22:43:40,622 INFO L226 Difference]: Without dead ends: 3897 [2021-06-05 22:43:40,622 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 922.6ms TimeCoverageRelationStatistics Valid=284, Invalid=1608, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:43:40,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3897 states. [2021-06-05 22:43:40,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3897 to 3413. [2021-06-05 22:43:40,666 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) [2021-06-05 22:43:40,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 13208 transitions. [2021-06-05 22:43:40,673 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 13208 transitions. Word has length 24 [2021-06-05 22:43:40,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:40,673 INFO L482 AbstractCegarLoop]: Abstraction has 3413 states and 13208 transitions. [2021-06-05 22:43:40,673 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) [2021-06-05 22:43:40,673 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 13208 transitions. [2021-06-05 22:43:40,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:43:40,678 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:40,678 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:40,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable663 [2021-06-05 22:43:40,879 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:43:40,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:40,879 INFO L82 PathProgramCache]: Analyzing trace with hash -665925914, now seen corresponding path program 212 times [2021-06-05 22:43:40,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:40,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545819633] [2021-06-05 22:43:40,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:40,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:41,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:41,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:41,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545819633] [2021-06-05 22:43:41,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545819633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:41,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158695921] [2021-06-05 22:43:41,049 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 [2021-06-05 22:43:41,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:43:41,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:41,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:43:41,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:41,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:41,204 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 [2021-06-05 22:43:41,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:41,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:41,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:41,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:43:41,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:41,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158695921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:41,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:41,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:43:41,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226232049] [2021-06-05 22:43:41,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:43:41,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:41,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:43:41,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:43:41,290 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) [2021-06-05 22:43:42,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:42,140 INFO L93 Difference]: Finished difference Result 3822 states and 14477 transitions. [2021-06-05 22:43:42,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:43:42,140 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 [2021-06-05 22:43:42,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:42,146 INFO L225 Difference]: With dead ends: 3822 [2021-06-05 22:43:42,146 INFO L226 Difference]: Without dead ends: 3813 [2021-06-05 22:43:42,147 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 772.8ms TimeCoverageRelationStatistics Valid=247, Invalid=1313, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:43:42,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2021-06-05 22:43:42,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 3417. [2021-06-05 22:43:42,185 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) [2021-06-05 22:43:42,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 13220 transitions. [2021-06-05 22:43:42,191 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 13220 transitions. Word has length 24 [2021-06-05 22:43:42,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:42,191 INFO L482 AbstractCegarLoop]: Abstraction has 3417 states and 13220 transitions. [2021-06-05 22:43:42,191 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) [2021-06-05 22:43:42,191 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 13220 transitions. [2021-06-05 22:43:42,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:43:42,196 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:42,196 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:42,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable664 [2021-06-05 22:43:42,396 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:43:42,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:42,396 INFO L82 PathProgramCache]: Analyzing trace with hash -342339736, now seen corresponding path program 213 times [2021-06-05 22:43:42,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:42,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089130311] [2021-06-05 22:43:42,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:42,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:42,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:42,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089130311] [2021-06-05 22:43:42,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089130311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:42,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469188868] [2021-06-05 22:43:42,576 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 [2021-06-05 22:43:42,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:43:42,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:42,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:43:42,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:42,735 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:42,735 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 [2021-06-05 22:43:42,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:42,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:42,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:42,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:37 [2021-06-05 22:43:42,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:42,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469188868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:42,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:42,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 22:43:42,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433019778] [2021-06-05 22:43:42,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:43:42,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:42,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:43:42,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:43:42,946 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) [2021-06-05 22:43:44,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:44,636 INFO L93 Difference]: Finished difference Result 3831 states and 14475 transitions. [2021-06-05 22:43:44,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:43:44,636 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 [2021-06-05 22:43:44,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:44,643 INFO L225 Difference]: With dead ends: 3831 [2021-06-05 22:43:44,643 INFO L226 Difference]: Without dead ends: 3822 [2021-06-05 22:43:44,643 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1556.3ms TimeCoverageRelationStatistics Valid=356, Invalid=2094, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:43:44,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2021-06-05 22:43:44,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 3419. [2021-06-05 22:43:44,684 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) [2021-06-05 22:43:44,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3419 states to 3419 states and 13226 transitions. [2021-06-05 22:43:44,691 INFO L78 Accepts]: Start accepts. Automaton has 3419 states and 13226 transitions. Word has length 24 [2021-06-05 22:43:44,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:44,691 INFO L482 AbstractCegarLoop]: Abstraction has 3419 states and 13226 transitions. [2021-06-05 22:43:44,691 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) [2021-06-05 22:43:44,691 INFO L276 IsEmpty]: Start isEmpty. Operand 3419 states and 13226 transitions. [2021-06-05 22:43:44,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:43:44,696 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:44,696 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:44,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable666 [2021-06-05 22:43:44,896 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:43:44,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:44,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1343404386, now seen corresponding path program 214 times [2021-06-05 22:43:44,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:44,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551755761] [2021-06-05 22:43:44,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:45,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:45,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:45,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551755761] [2021-06-05 22:43:45,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551755761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:45,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206760462] [2021-06-05 22:43:45,077 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 [2021-06-05 22:43:45,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:43:45,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:45,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:43:45,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:45,214 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 21 treesize of output 13 [2021-06-05 22:43:45,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:45,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:45,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:45,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:43:45,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:45,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206760462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:45,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:45,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:43:45,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63725846] [2021-06-05 22:43:45,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:43:45,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:45,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:43:45,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:43:45,259 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) [2021-06-05 22:43:46,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:46,074 INFO L93 Difference]: Finished difference Result 3799 states and 14404 transitions. [2021-06-05 22:43:46,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:43:46,074 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 [2021-06-05 22:43:46,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:46,081 INFO L225 Difference]: With dead ends: 3799 [2021-06-05 22:43:46,081 INFO L226 Difference]: Without dead ends: 3788 [2021-06-05 22:43:46,081 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 707.1ms TimeCoverageRelationStatistics Valid=193, Invalid=1213, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:43:46,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3788 states. [2021-06-05 22:43:46,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3788 to 3413. [2021-06-05 22:43:46,123 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) [2021-06-05 22:43:46,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 13208 transitions. [2021-06-05 22:43:46,130 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 13208 transitions. Word has length 24 [2021-06-05 22:43:46,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:46,131 INFO L482 AbstractCegarLoop]: Abstraction has 3413 states and 13208 transitions. [2021-06-05 22:43:46,131 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) [2021-06-05 22:43:46,131 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 13208 transitions. [2021-06-05 22:43:46,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:43:46,136 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:46,136 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:46,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable675 [2021-06-05 22:43:46,336 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:43:46,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:46,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1891928856, now seen corresponding path program 215 times [2021-06-05 22:43:46,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:46,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731760059] [2021-06-05 22:43:46,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:46,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:46,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:46,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731760059] [2021-06-05 22:43:46,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731760059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:46,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799952516] [2021-06-05 22:43:46,520 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 [2021-06-05 22:43:46,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:43:46,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:46,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:43:46,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:46,705 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 [2021-06-05 22:43:46,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:46,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:46,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:46,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:43:46,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:46,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799952516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:46,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:46,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:43:46,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797827432] [2021-06-05 22:43:46,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:43:46,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:46,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:43:46,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:43:46,734 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) [2021-06-05 22:43:47,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:47,863 INFO L93 Difference]: Finished difference Result 3852 states and 14553 transitions. [2021-06-05 22:43:47,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:43:47,863 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 [2021-06-05 22:43:47,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:47,870 INFO L225 Difference]: With dead ends: 3852 [2021-06-05 22:43:47,870 INFO L226 Difference]: Without dead ends: 3843 [2021-06-05 22:43:47,870 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 897.8ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:43:47,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3843 states. [2021-06-05 22:43:47,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3843 to 3410. [2021-06-05 22:43:47,915 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) [2021-06-05 22:43:47,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3410 states to 3410 states and 13197 transitions. [2021-06-05 22:43:47,924 INFO L78 Accepts]: Start accepts. Automaton has 3410 states and 13197 transitions. Word has length 24 [2021-06-05 22:43:47,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:47,924 INFO L482 AbstractCegarLoop]: Abstraction has 3410 states and 13197 transitions. [2021-06-05 22:43:47,924 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) [2021-06-05 22:43:47,924 INFO L276 IsEmpty]: Start isEmpty. Operand 3410 states and 13197 transitions. [2021-06-05 22:43:47,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:43:47,929 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:47,929 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:48,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable676 [2021-06-05 22:43:48,141 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:43:48,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:48,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1425885276, now seen corresponding path program 216 times [2021-06-05 22:43:48,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:48,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202050676] [2021-06-05 22:43:48,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:48,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:48,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:48,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:48,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202050676] [2021-06-05 22:43:48,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202050676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:48,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978524336] [2021-06-05 22:43:48,392 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 [2021-06-05 22:43:48,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:43:48,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:48,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:43:48,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:48,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:48,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:48,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:48,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:48,648 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 [2021-06-05 22:43:48,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:43:48,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:48,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:48,662 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-05 22:43:48,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:48,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978524336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:48,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:48,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:43:48,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47312275] [2021-06-05 22:43:48,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:43:48,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:48,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:43:48,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:43:48,729 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) [2021-06-05 22:43:49,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:49,901 INFO L93 Difference]: Finished difference Result 3929 states and 14813 transitions. [2021-06-05 22:43:49,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:43:49,901 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 [2021-06-05 22:43:49,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:49,908 INFO L225 Difference]: With dead ends: 3929 [2021-06-05 22:43:49,908 INFO L226 Difference]: Without dead ends: 3911 [2021-06-05 22:43:49,908 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 968.2ms TimeCoverageRelationStatistics Valid=256, Invalid=1466, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:43:49,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3911 states. [2021-06-05 22:43:49,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3911 to 3411. [2021-06-05 22:43:49,956 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) [2021-06-05 22:43:49,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3411 states to 3411 states and 13201 transitions. [2021-06-05 22:43:49,964 INFO L78 Accepts]: Start accepts. Automaton has 3411 states and 13201 transitions. Word has length 24 [2021-06-05 22:43:49,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:49,964 INFO L482 AbstractCegarLoop]: Abstraction has 3411 states and 13201 transitions. [2021-06-05 22:43:49,964 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) [2021-06-05 22:43:49,964 INFO L276 IsEmpty]: Start isEmpty. Operand 3411 states and 13201 transitions. [2021-06-05 22:43:49,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:43:49,969 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:49,969 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:50,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable677,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:50,170 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:43:50,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:50,170 INFO L82 PathProgramCache]: Analyzing trace with hash -82196782, now seen corresponding path program 217 times [2021-06-05 22:43:50,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:50,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548646521] [2021-06-05 22:43:50,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:50,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:50,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:50,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:50,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548646521] [2021-06-05 22:43:50,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548646521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:50,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161149546] [2021-06-05 22:43:50,391 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 [2021-06-05 22:43:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:50,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:43:50,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:50,558 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 20 treesize of output 12 [2021-06-05 22:43:50,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:50,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:50,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:50,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:43:50,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:50,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161149546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:50,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:50,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:43:50,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236394424] [2021-06-05 22:43:50,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:43:50,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:50,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:43:50,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:43:50,589 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) [2021-06-05 22:43:51,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:51,850 INFO L93 Difference]: Finished difference Result 3959 states and 14910 transitions. [2021-06-05 22:43:51,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:43:51,850 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 [2021-06-05 22:43:51,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:51,857 INFO L225 Difference]: With dead ends: 3959 [2021-06-05 22:43:51,858 INFO L226 Difference]: Without dead ends: 3940 [2021-06-05 22:43:51,858 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 1024.7ms TimeCoverageRelationStatistics Valid=304, Invalid=1676, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:43:51,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3940 states. [2021-06-05 22:43:51,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3940 to 3414. [2021-06-05 22:43:51,914 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) [2021-06-05 22:43:51,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3414 states to 3414 states and 13209 transitions. [2021-06-05 22:43:51,922 INFO L78 Accepts]: Start accepts. Automaton has 3414 states and 13209 transitions. Word has length 24 [2021-06-05 22:43:51,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:51,922 INFO L482 AbstractCegarLoop]: Abstraction has 3414 states and 13209 transitions. [2021-06-05 22:43:51,922 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) [2021-06-05 22:43:51,922 INFO L276 IsEmpty]: Start isEmpty. Operand 3414 states and 13209 transitions. [2021-06-05 22:43:51,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:43:51,927 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:51,928 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:52,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable681,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:52,128 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:43:52,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:52,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1854046730, now seen corresponding path program 218 times [2021-06-05 22:43:52,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:52,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748134892] [2021-06-05 22:43:52,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:52,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:52,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:52,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748134892] [2021-06-05 22:43:52,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748134892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:52,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854532827] [2021-06-05 22:43:52,312 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 [2021-06-05 22:43:52,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:43:52,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:52,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:43:52,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:52,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:52,484 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 [2021-06-05 22:43:52,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:52,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:52,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:52,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 22:43:52,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:52,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854532827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:52,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:52,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:43:52,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965346855] [2021-06-05 22:43:52,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:43:52,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:52,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:43:52,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:43:52,552 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) [2021-06-05 22:43:54,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:54,201 INFO L93 Difference]: Finished difference Result 3982 states and 14970 transitions. [2021-06-05 22:43:54,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:43:54,201 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 [2021-06-05 22:43:54,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:54,208 INFO L225 Difference]: With dead ends: 3982 [2021-06-05 22:43:54,208 INFO L226 Difference]: Without dead ends: 3963 [2021-06-05 22:43:54,208 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 1365.4ms TimeCoverageRelationStatistics Valid=440, Invalid=2110, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:43:54,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3963 states. [2021-06-05 22:43:54,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3963 to 3412. [2021-06-05 22:43:54,252 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) [2021-06-05 22:43:54,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3412 states to 3412 states and 13205 transitions. [2021-06-05 22:43:54,259 INFO L78 Accepts]: Start accepts. Automaton has 3412 states and 13205 transitions. Word has length 24 [2021-06-05 22:43:54,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:54,259 INFO L482 AbstractCegarLoop]: Abstraction has 3412 states and 13205 transitions. [2021-06-05 22:43:54,259 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) [2021-06-05 22:43:54,260 INFO L276 IsEmpty]: Start isEmpty. Operand 3412 states and 13205 transitions. [2021-06-05 22:43:54,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:43:54,264 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:54,264 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:54,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable682,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:54,465 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:43:54,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:54,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1677505298, now seen corresponding path program 219 times [2021-06-05 22:43:54,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:54,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755486083] [2021-06-05 22:43:54,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:54,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:54,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:54,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755486083] [2021-06-05 22:43:54,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755486083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:54,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203945845] [2021-06-05 22:43:54,644 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 [2021-06-05 22:43:54,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:43:54,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:54,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:43:54,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:54,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:54,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:43:54,814 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 [2021-06-05 22:43:54,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:54,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:54,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:54,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:7 [2021-06-05 22:43:54,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:54,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203945845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:54,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:54,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:43:54,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652544196] [2021-06-05 22:43:54,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:43:54,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:54,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:43:54,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:43:54,865 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) [2021-06-05 22:43:55,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:55,792 INFO L93 Difference]: Finished difference Result 3864 states and 14615 transitions. [2021-06-05 22:43:55,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:43:55,792 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 [2021-06-05 22:43:55,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:55,799 INFO L225 Difference]: With dead ends: 3864 [2021-06-05 22:43:55,799 INFO L226 Difference]: Without dead ends: 3855 [2021-06-05 22:43:55,799 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 817.6ms TimeCoverageRelationStatistics Valid=293, Invalid=1347, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:43:55,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3855 states. [2021-06-05 22:43:55,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3855 to 3415. [2021-06-05 22:43:55,845 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) [2021-06-05 22:43:55,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3415 states to 3415 states and 13215 transitions. [2021-06-05 22:43:55,852 INFO L78 Accepts]: Start accepts. Automaton has 3415 states and 13215 transitions. Word has length 24 [2021-06-05 22:43:55,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:55,852 INFO L482 AbstractCegarLoop]: Abstraction has 3415 states and 13215 transitions. [2021-06-05 22:43:55,852 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) [2021-06-05 22:43:55,853 INFO L276 IsEmpty]: Start isEmpty. Operand 3415 states and 13215 transitions. [2021-06-05 22:43:55,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:43:55,858 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:55,858 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:56,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable685 [2021-06-05 22:43:56,058 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:43:56,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:56,058 INFO L82 PathProgramCache]: Analyzing trace with hash 843766858, now seen corresponding path program 220 times [2021-06-05 22:43:56,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:56,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581625564] [2021-06-05 22:43:56,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:56,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:56,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:56,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581625564] [2021-06-05 22:43:56,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581625564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:56,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288547712] [2021-06-05 22:43:56,242 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 [2021-06-05 22:43:56,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:43:56,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:56,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:43:56,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:56,374 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 [2021-06-05 22:43:56,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:56,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:56,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:56,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:43:56,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:56,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288547712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:56,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:56,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:43:56,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458203264] [2021-06-05 22:43:56,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:43:56,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:56,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:43:56,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:43:56,423 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) [2021-06-05 22:43:57,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:57,381 INFO L93 Difference]: Finished difference Result 3851 states and 14577 transitions. [2021-06-05 22:43:57,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:43:57,382 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 [2021-06-05 22:43:57,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:57,388 INFO L225 Difference]: With dead ends: 3851 [2021-06-05 22:43:57,388 INFO L226 Difference]: Without dead ends: 3841 [2021-06-05 22:43:57,389 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 738.5ms TimeCoverageRelationStatistics Valid=240, Invalid=1166, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:43:57,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3841 states. [2021-06-05 22:43:57,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3841 to 3411. [2021-06-05 22:43:57,430 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) [2021-06-05 22:43:57,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3411 states to 3411 states and 13201 transitions. [2021-06-05 22:43:57,437 INFO L78 Accepts]: Start accepts. Automaton has 3411 states and 13201 transitions. Word has length 24 [2021-06-05 22:43:57,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:57,438 INFO L482 AbstractCegarLoop]: Abstraction has 3411 states and 13201 transitions. [2021-06-05 22:43:57,438 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) [2021-06-05 22:43:57,438 INFO L276 IsEmpty]: Start isEmpty. Operand 3411 states and 13201 transitions. [2021-06-05 22:43:57,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:43:57,442 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:57,442 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:57,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable686 [2021-06-05 22:43:57,643 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:43:57,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:57,643 INFO L82 PathProgramCache]: Analyzing trace with hash 564954386, now seen corresponding path program 221 times [2021-06-05 22:43:57,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:57,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154615043] [2021-06-05 22:43:57,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:57,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:57,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:57,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154615043] [2021-06-05 22:43:57,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154615043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:57,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131414217] [2021-06-05 22:43:57,828 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 [2021-06-05 22:43:57,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:43:57,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:57,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:43:57,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:57,992 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 [2021-06-05 22:43:57,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:43:57,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:57,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:57,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:43:58,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:58,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131414217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:58,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:58,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:43:58,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998818348] [2021-06-05 22:43:58,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:43:58,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:58,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:43:58,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:43:58,022 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) [2021-06-05 22:43:59,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:59,157 INFO L93 Difference]: Finished difference Result 3840 states and 14522 transitions. [2021-06-05 22:43:59,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:43:59,157 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 [2021-06-05 22:43:59,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:59,163 INFO L225 Difference]: With dead ends: 3840 [2021-06-05 22:43:59,163 INFO L226 Difference]: Without dead ends: 3831 [2021-06-05 22:43:59,163 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 877.4ms TimeCoverageRelationStatistics Valid=269, Invalid=1537, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:43:59,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3831 states. [2021-06-05 22:43:59,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3831 to 3412. [2021-06-05 22:43:59,203 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) [2021-06-05 22:43:59,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3412 states to 3412 states and 13205 transitions. [2021-06-05 22:43:59,210 INFO L78 Accepts]: Start accepts. Automaton has 3412 states and 13205 transitions. Word has length 24 [2021-06-05 22:43:59,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:59,210 INFO L482 AbstractCegarLoop]: Abstraction has 3412 states and 13205 transitions. [2021-06-05 22:43:59,210 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) [2021-06-05 22:43:59,210 INFO L276 IsEmpty]: Start isEmpty. Operand 3412 states and 13205 transitions. [2021-06-05 22:43:59,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:43:59,215 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:59,215 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:59,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable687 [2021-06-05 22:43:59,415 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:43:59,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:59,415 INFO L82 PathProgramCache]: Analyzing trace with hash -2001341164, now seen corresponding path program 222 times [2021-06-05 22:43:59,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:59,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923169667] [2021-06-05 22:43:59,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:59,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:59,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:59,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923169667] [2021-06-05 22:43:59,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923169667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:59,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102586624] [2021-06-05 22:43:59,595 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 [2021-06-05 22:43:59,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:43:59,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:59,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:43:59,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:59,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:59,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:59,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:43:59,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:59,821 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 [2021-06-05 22:43:59,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:43:59,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:43:59,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:43:59,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-05 22:43:59,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:59,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102586624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:59,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:59,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:43:59,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001395863] [2021-06-05 22:43:59,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:43:59,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:59,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:43:59,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:43:59,906 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) [2021-06-05 22:44:01,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:01,077 INFO L93 Difference]: Finished difference Result 3889 states and 14648 transitions. [2021-06-05 22:44:01,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:44:01,077 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 [2021-06-05 22:44:01,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:01,083 INFO L225 Difference]: With dead ends: 3889 [2021-06-05 22:44:01,084 INFO L226 Difference]: Without dead ends: 3870 [2021-06-05 22:44:01,084 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 860.2ms TimeCoverageRelationStatistics Valid=244, Invalid=1396, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:44:01,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3870 states. [2021-06-05 22:44:01,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3870 to 3413. [2021-06-05 22:44:01,128 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) [2021-06-05 22:44:01,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 13209 transitions. [2021-06-05 22:44:01,136 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 13209 transitions. Word has length 24 [2021-06-05 22:44:01,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:01,136 INFO L482 AbstractCegarLoop]: Abstraction has 3413 states and 13209 transitions. [2021-06-05 22:44:01,136 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) [2021-06-05 22:44:01,136 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 13209 transitions. [2021-06-05 22:44:01,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:44:01,141 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:01,142 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:01,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable688,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:01,342 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:44:01,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:01,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1265476272, now seen corresponding path program 223 times [2021-06-05 22:44:01,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:01,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022400175] [2021-06-05 22:44:01,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:01,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:01,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:01,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:01,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022400175] [2021-06-05 22:44:01,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022400175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:01,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561670161] [2021-06-05 22:44:01,509 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 [2021-06-05 22:44:01,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:01,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:44:01,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:01,648 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 21 treesize of output 13 [2021-06-05 22:44:01,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:01,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:01,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:01,652 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:44:01,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:01,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561670161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:01,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:01,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:44:01,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028532023] [2021-06-05 22:44:01,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:44:01,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:01,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:44:01,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:44:01,696 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) [2021-06-05 22:44:02,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:02,675 INFO L93 Difference]: Finished difference Result 3870 states and 14613 transitions. [2021-06-05 22:44:02,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:44:02,675 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 [2021-06-05 22:44:02,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:02,681 INFO L225 Difference]: With dead ends: 3870 [2021-06-05 22:44:02,682 INFO L226 Difference]: Without dead ends: 3861 [2021-06-05 22:44:02,682 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 769.3ms TimeCoverageRelationStatistics Valid=277, Invalid=1445, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:44:02,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3861 states. [2021-06-05 22:44:02,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3861 to 3416. [2021-06-05 22:44:02,723 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) [2021-06-05 22:44:02,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3416 states to 3416 states and 13219 transitions. [2021-06-05 22:44:02,730 INFO L78 Accepts]: Start accepts. Automaton has 3416 states and 13219 transitions. Word has length 24 [2021-06-05 22:44:02,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:02,731 INFO L482 AbstractCegarLoop]: Abstraction has 3416 states and 13219 transitions. [2021-06-05 22:44:02,731 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) [2021-06-05 22:44:02,731 INFO L276 IsEmpty]: Start isEmpty. Operand 3416 states and 13219 transitions. [2021-06-05 22:44:02,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:44:02,735 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:02,735 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:02,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable692,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:02,936 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:44:02,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:02,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1589062450, now seen corresponding path program 224 times [2021-06-05 22:44:02,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:02,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850212284] [2021-06-05 22:44:02,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:02,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:03,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:03,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:03,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850212284] [2021-06-05 22:44:03,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850212284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:03,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350040664] [2021-06-05 22:44:03,107 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 [2021-06-05 22:44:03,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:44:03,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:03,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:44:03,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:03,264 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:03,264 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 [2021-06-05 22:44:03,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:03,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:03,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:03,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:44:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:03,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350040664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:03,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:03,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:44:03,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897517290] [2021-06-05 22:44:03,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:44:03,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:03,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:44:03,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:44:03,361 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) [2021-06-05 22:44:04,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:04,504 INFO L93 Difference]: Finished difference Result 3861 states and 14586 transitions. [2021-06-05 22:44:04,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:44:04,505 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 [2021-06-05 22:44:04,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:04,511 INFO L225 Difference]: With dead ends: 3861 [2021-06-05 22:44:04,511 INFO L226 Difference]: Without dead ends: 3848 [2021-06-05 22:44:04,511 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 881.2ms TimeCoverageRelationStatistics Valid=261, Invalid=1461, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:44:04,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3848 states. [2021-06-05 22:44:04,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3848 to 3411. [2021-06-05 22:44:04,554 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) [2021-06-05 22:44:04,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3411 states to 3411 states and 13201 transitions. [2021-06-05 22:44:04,562 INFO L78 Accepts]: Start accepts. Automaton has 3411 states and 13201 transitions. Word has length 24 [2021-06-05 22:44:04,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:04,562 INFO L482 AbstractCegarLoop]: Abstraction has 3411 states and 13201 transitions. [2021-06-05 22:44:04,562 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) [2021-06-05 22:44:04,562 INFO L276 IsEmpty]: Start isEmpty. Operand 3411 states and 13201 transitions. [2021-06-05 22:44:04,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:44:04,567 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:04,567 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:04,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable693 [2021-06-05 22:44:04,767 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:44:04,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:04,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1707034270, now seen corresponding path program 225 times [2021-06-05 22:44:04,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:04,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955988857] [2021-06-05 22:44:04,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:04,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:04,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:04,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:04,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955988857] [2021-06-05 22:44:04,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955988857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:04,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138008342] [2021-06-05 22:44:04,953 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 [2021-06-05 22:44:04,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:44:04,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:04,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:44:04,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:05,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:05,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:05,167 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 [2021-06-05 22:44:05,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:05,195 INFO L628 ElimStorePlain]: treesize reduction 14, result has 70.2 percent of original size [2021-06-05 22:44:05,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:05,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:43 [2021-06-05 22:44:05,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:05,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138008342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:05,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:05,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:44:05,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749975828] [2021-06-05 22:44:05,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:44:05,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:05,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:44:05,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:44:05,257 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) [2021-06-05 22:44:06,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:06,420 INFO L93 Difference]: Finished difference Result 3920 states and 14728 transitions. [2021-06-05 22:44:06,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:44:06,421 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 [2021-06-05 22:44:06,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:06,428 INFO L225 Difference]: With dead ends: 3920 [2021-06-05 22:44:06,428 INFO L226 Difference]: Without dead ends: 3892 [2021-06-05 22:44:06,428 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 869.6ms TimeCoverageRelationStatistics Valid=264, Invalid=1542, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:44:06,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3892 states. [2021-06-05 22:44:06,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3892 to 3413. [2021-06-05 22:44:06,474 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) [2021-06-05 22:44:06,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 13207 transitions. [2021-06-05 22:44:06,481 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 13207 transitions. Word has length 24 [2021-06-05 22:44:06,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:06,481 INFO L482 AbstractCegarLoop]: Abstraction has 3413 states and 13207 transitions. [2021-06-05 22:44:06,482 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) [2021-06-05 22:44:06,482 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 13207 transitions. [2021-06-05 22:44:06,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:44:06,486 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:06,486 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:06,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable695 [2021-06-05 22:44:06,687 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:44:06,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:06,687 INFO L82 PathProgramCache]: Analyzing trace with hash -442736788, now seen corresponding path program 226 times [2021-06-05 22:44:06,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:06,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501356558] [2021-06-05 22:44:06,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:06,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:06,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:06,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:06,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501356558] [2021-06-05 22:44:06,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501356558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:06,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541637114] [2021-06-05 22:44:06,936 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 [2021-06-05 22:44:06,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:44:06,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:06,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:44:06,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:07,103 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 [2021-06-05 22:44:07,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:07,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:07,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:07,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 22:44:07,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:07,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541637114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:07,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:07,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:44:07,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300904380] [2021-06-05 22:44:07,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:44:07,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:07,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:44:07,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:44:07,132 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) [2021-06-05 22:44:08,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:08,196 INFO L93 Difference]: Finished difference Result 3873 states and 14628 transitions. [2021-06-05 22:44:08,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:44:08,196 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 [2021-06-05 22:44:08,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:08,203 INFO L225 Difference]: With dead ends: 3873 [2021-06-05 22:44:08,203 INFO L226 Difference]: Without dead ends: 3854 [2021-06-05 22:44:08,203 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 921.1ms TimeCoverageRelationStatistics Valid=287, Invalid=1519, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:44:08,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3854 states. [2021-06-05 22:44:08,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3854 to 3412. [2021-06-05 22:44:08,244 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) [2021-06-05 22:44:08,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3412 states to 3412 states and 13205 transitions. [2021-06-05 22:44:08,251 INFO L78 Accepts]: Start accepts. Automaton has 3412 states and 13205 transitions. Word has length 24 [2021-06-05 22:44:08,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:08,251 INFO L482 AbstractCegarLoop]: Abstraction has 3412 states and 13205 transitions. [2021-06-05 22:44:08,252 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) [2021-06-05 22:44:08,252 INFO L276 IsEmpty]: Start isEmpty. Operand 3412 states and 13205 transitions. [2021-06-05 22:44:08,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:44:08,256 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:08,256 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:08,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable700,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:08,457 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:44:08,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:08,457 INFO L82 PathProgramCache]: Analyzing trace with hash -619278220, now seen corresponding path program 227 times [2021-06-05 22:44:08,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:08,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180340599] [2021-06-05 22:44:08,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:08,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:08,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:08,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:08,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180340599] [2021-06-05 22:44:08,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180340599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:08,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279361540] [2021-06-05 22:44:08,659 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 [2021-06-05 22:44:08,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:44:08,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:08,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:44:08,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:08,796 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 [2021-06-05 22:44:08,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:08,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:08,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:08,800 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:44:08,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:08,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279361540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:08,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:08,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:44:08,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329460044] [2021-06-05 22:44:08,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:44:08,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:08,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:44:08,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:44:08,843 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) [2021-06-05 22:44:09,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:09,663 INFO L93 Difference]: Finished difference Result 3806 states and 14423 transitions. [2021-06-05 22:44:09,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:44:09,663 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 [2021-06-05 22:44:09,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:09,669 INFO L225 Difference]: With dead ends: 3806 [2021-06-05 22:44:09,670 INFO L226 Difference]: Without dead ends: 3797 [2021-06-05 22:44:09,670 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 739.7ms TimeCoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:44:09,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3797 states. [2021-06-05 22:44:09,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3797 to 3414. [2021-06-05 22:44:09,714 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) [2021-06-05 22:44:09,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3414 states to 3414 states and 13213 transitions. [2021-06-05 22:44:09,721 INFO L78 Accepts]: Start accepts. Automaton has 3414 states and 13213 transitions. Word has length 24 [2021-06-05 22:44:09,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:09,721 INFO L482 AbstractCegarLoop]: Abstraction has 3414 states and 13213 transitions. [2021-06-05 22:44:09,721 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) [2021-06-05 22:44:09,721 INFO L276 IsEmpty]: Start isEmpty. Operand 3414 states and 13213 transitions. [2021-06-05 22:44:09,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:44:09,726 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:09,726 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:09,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable701 [2021-06-05 22:44:09,927 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:44:09,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:09,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1453016660, now seen corresponding path program 228 times [2021-06-05 22:44:09,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:09,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378876005] [2021-06-05 22:44:09,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:09,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:10,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:10,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378876005] [2021-06-05 22:44:10,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378876005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:10,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239979631] [2021-06-05 22:44:10,105 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 [2021-06-05 22:44:10,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:44:10,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:10,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:44:10,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:10,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:10,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:10,276 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 [2021-06-05 22:44:10,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:10,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:10,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:10,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:7 [2021-06-05 22:44:10,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:10,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239979631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:10,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:10,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:44:10,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190066413] [2021-06-05 22:44:10,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:44:10,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:10,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:44:10,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:44:10,328 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) [2021-06-05 22:44:11,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:11,197 INFO L93 Difference]: Finished difference Result 3783 states and 14356 transitions. [2021-06-05 22:44:11,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:44:11,197 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 [2021-06-05 22:44:11,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:11,203 INFO L225 Difference]: With dead ends: 3783 [2021-06-05 22:44:11,203 INFO L226 Difference]: Without dead ends: 3773 [2021-06-05 22:44:11,203 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 762.6ms TimeCoverageRelationStatistics Valid=248, Invalid=1158, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:44:11,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3773 states. [2021-06-05 22:44:11,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3773 to 3411. [2021-06-05 22:44:11,244 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) [2021-06-05 22:44:11,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3411 states to 3411 states and 13201 transitions. [2021-06-05 22:44:11,251 INFO L78 Accepts]: Start accepts. Automaton has 3411 states and 13201 transitions. Word has length 24 [2021-06-05 22:44:11,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:11,251 INFO L482 AbstractCegarLoop]: Abstraction has 3411 states and 13201 transitions. [2021-06-05 22:44:11,251 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) [2021-06-05 22:44:11,251 INFO L276 IsEmpty]: Start isEmpty. Operand 3411 states and 13201 transitions. [2021-06-05 22:44:11,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:44:11,256 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:11,256 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:11,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable702,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:11,456 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:44:11,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:11,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1240546540, now seen corresponding path program 229 times [2021-06-05 22:44:11,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:11,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683409498] [2021-06-05 22:44:11,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:11,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:11,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:11,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:11,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683409498] [2021-06-05 22:44:11,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683409498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:11,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079229760] [2021-06-05 22:44:11,634 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 [2021-06-05 22:44:11,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:11,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:44:11,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:11,789 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 [2021-06-05 22:44:11,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:11,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:11,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:11,792 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:44:11,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:11,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079229760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:11,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:11,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:44:11,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175835984] [2021-06-05 22:44:11,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:44:11,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:11,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:44:11,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:44:11,819 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) [2021-06-05 22:44:12,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:12,873 INFO L93 Difference]: Finished difference Result 3883 states and 14653 transitions. [2021-06-05 22:44:12,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:44:12,873 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 [2021-06-05 22:44:12,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:12,894 INFO L225 Difference]: With dead ends: 3883 [2021-06-05 22:44:12,894 INFO L226 Difference]: Without dead ends: 3864 [2021-06-05 22:44:12,894 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 771.2ms TimeCoverageRelationStatistics Valid=246, Invalid=1394, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:44:12,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3864 states. [2021-06-05 22:44:12,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3864 to 3411. [2021-06-05 22:44:12,931 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) [2021-06-05 22:44:12,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3411 states to 3411 states and 13201 transitions. [2021-06-05 22:44:12,938 INFO L78 Accepts]: Start accepts. Automaton has 3411 states and 13201 transitions. Word has length 24 [2021-06-05 22:44:12,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:12,938 INFO L482 AbstractCegarLoop]: Abstraction has 3411 states and 13201 transitions. [2021-06-05 22:44:12,938 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) [2021-06-05 22:44:12,938 INFO L276 IsEmpty]: Start isEmpty. Operand 3411 states and 13201 transitions. [2021-06-05 22:44:12,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:44:12,943 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:12,943 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:13,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable703,355 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:13,143 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:44:13,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:13,144 INFO L82 PathProgramCache]: Analyzing trace with hash 212396680, now seen corresponding path program 230 times [2021-06-05 22:44:13,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:13,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731138312] [2021-06-05 22:44:13,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:13,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:13,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:13,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731138312] [2021-06-05 22:44:13,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731138312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:13,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934609780] [2021-06-05 22:44:13,303 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 [2021-06-05 22:44:13,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:44:13,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:13,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:44:13,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:13,460 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:13,460 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 [2021-06-05 22:44:13,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:13,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:13,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:13,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:44:13,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:13,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934609780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:13,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:13,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:44:13,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150652290] [2021-06-05 22:44:13,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:44:13,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:13,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:44:13,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:44:13,545 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) [2021-06-05 22:44:14,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:14,416 INFO L93 Difference]: Finished difference Result 3872 states and 14637 transitions. [2021-06-05 22:44:14,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:44:14,417 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 [2021-06-05 22:44:14,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:14,423 INFO L225 Difference]: With dead ends: 3872 [2021-06-05 22:44:14,424 INFO L226 Difference]: Without dead ends: 3862 [2021-06-05 22:44:14,424 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 786.3ms TimeCoverageRelationStatistics Valid=279, Invalid=1527, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:44:14,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2021-06-05 22:44:14,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 3414. [2021-06-05 22:44:14,484 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) [2021-06-05 22:44:14,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3414 states to 3414 states and 13212 transitions. [2021-06-05 22:44:14,491 INFO L78 Accepts]: Start accepts. Automaton has 3414 states and 13212 transitions. Word has length 24 [2021-06-05 22:44:14,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:14,491 INFO L482 AbstractCegarLoop]: Abstraction has 3414 states and 13212 transitions. [2021-06-05 22:44:14,491 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) [2021-06-05 22:44:14,492 INFO L276 IsEmpty]: Start isEmpty. Operand 3414 states and 13212 transitions. [2021-06-05 22:44:14,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:44:14,496 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:14,496 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:14,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable704,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:14,697 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:44:14,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:14,697 INFO L82 PathProgramCache]: Analyzing trace with hash 535982858, now seen corresponding path program 231 times [2021-06-05 22:44:14,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:14,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130006802] [2021-06-05 22:44:14,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:14,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:14,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:14,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130006802] [2021-06-05 22:44:14,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130006802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:14,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393872442] [2021-06-05 22:44:14,869 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 [2021-06-05 22:44:14,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:44:14,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:14,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:44:14,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:15,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:15,043 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 [2021-06-05 22:44:15,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:15,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:15,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:15,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:37 [2021-06-05 22:44:15,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:15,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393872442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:15,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:15,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 22:44:15,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045096011] [2021-06-05 22:44:15,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:44:15,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:15,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:44:15,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:44:15,267 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) [2021-06-05 22:44:17,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:17,133 INFO L93 Difference]: Finished difference Result 4016 states and 14984 transitions. [2021-06-05 22:44:17,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:44:17,134 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 [2021-06-05 22:44:17,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:17,141 INFO L225 Difference]: With dead ends: 4016 [2021-06-05 22:44:17,141 INFO L226 Difference]: Without dead ends: 3997 [2021-06-05 22:44:17,141 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 1651.8ms TimeCoverageRelationStatistics Valid=413, Invalid=2343, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 22:44:17,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3997 states. [2021-06-05 22:44:17,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3997 to 3426. [2021-06-05 22:44:17,185 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) [2021-06-05 22:44:17,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3426 states to 3426 states and 13256 transitions. [2021-06-05 22:44:17,193 INFO L78 Accepts]: Start accepts. Automaton has 3426 states and 13256 transitions. Word has length 24 [2021-06-05 22:44:17,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:17,193 INFO L482 AbstractCegarLoop]: Abstraction has 3426 states and 13256 transitions. [2021-06-05 22:44:17,193 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) [2021-06-05 22:44:17,193 INFO L276 IsEmpty]: Start isEmpty. Operand 3426 states and 13256 transitions. [2021-06-05 22:44:17,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:44:17,198 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:17,198 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:17,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable706,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:17,398 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:44:17,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:17,398 INFO L82 PathProgramCache]: Analyzing trace with hash -2073240316, now seen corresponding path program 232 times [2021-06-05 22:44:17,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:17,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242948990] [2021-06-05 22:44:17,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:17,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:17,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:17,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242948990] [2021-06-05 22:44:17,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242948990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:17,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983482717] [2021-06-05 22:44:17,555 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 [2021-06-05 22:44:17,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:44:17,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:17,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:44:17,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:17,687 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 [2021-06-05 22:44:17,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:17,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:17,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:17,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:44:17,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:17,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983482717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:17,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:17,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:44:17,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074862555] [2021-06-05 22:44:17,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:44:17,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:17,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:44:17,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:44:17,729 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) [2021-06-05 22:44:18,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:18,563 INFO L93 Difference]: Finished difference Result 3782 states and 14374 transitions. [2021-06-05 22:44:18,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:44:18,564 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 [2021-06-05 22:44:18,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:18,570 INFO L225 Difference]: With dead ends: 3782 [2021-06-05 22:44:18,571 INFO L226 Difference]: Without dead ends: 3767 [2021-06-05 22:44:18,571 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 671.5ms TimeCoverageRelationStatistics Valid=221, Invalid=1185, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:44:18,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3767 states. [2021-06-05 22:44:18,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3767 to 3420. [2021-06-05 22:44:18,616 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) [2021-06-05 22:44:18,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3420 states to 3420 states and 13234 transitions. [2021-06-05 22:44:18,623 INFO L78 Accepts]: Start accepts. Automaton has 3420 states and 13234 transitions. Word has length 24 [2021-06-05 22:44:18,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:18,623 INFO L482 AbstractCegarLoop]: Abstraction has 3420 states and 13234 transitions. [2021-06-05 22:44:18,624 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) [2021-06-05 22:44:18,624 INFO L276 IsEmpty]: Start isEmpty. Operand 3420 states and 13234 transitions. [2021-06-05 22:44:18,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:44:18,629 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:18,629 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:18,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable715,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:18,829 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:44:18,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:18,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1859993244, now seen corresponding path program 233 times [2021-06-05 22:44:18,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:18,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061281460] [2021-06-05 22:44:18,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:18,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:19,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:19,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061281460] [2021-06-05 22:44:19,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061281460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:19,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775338802] [2021-06-05 22:44:19,008 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 [2021-06-05 22:44:19,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:44:19,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:19,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:44:19,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:19,169 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 [2021-06-05 22:44:19,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:19,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:19,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:19,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 22:44:19,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:19,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775338802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:19,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:19,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:44:19,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441222773] [2021-06-05 22:44:19,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:44:19,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:19,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:44:19,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:44:19,198 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) [2021-06-05 22:44:20,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:20,146 INFO L93 Difference]: Finished difference Result 3906 states and 14738 transitions. [2021-06-05 22:44:20,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:44:20,146 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 [2021-06-05 22:44:20,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:20,153 INFO L225 Difference]: With dead ends: 3906 [2021-06-05 22:44:20,153 INFO L226 Difference]: Without dead ends: 3887 [2021-06-05 22:44:20,153 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 776.1ms TimeCoverageRelationStatistics Valid=263, Invalid=1377, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:44:20,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3887 states. [2021-06-05 22:44:20,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3887 to 3420. [2021-06-05 22:44:20,195 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) [2021-06-05 22:44:20,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3420 states to 3420 states and 13234 transitions. [2021-06-05 22:44:20,203 INFO L78 Accepts]: Start accepts. Automaton has 3420 states and 13234 transitions. Word has length 24 [2021-06-05 22:44:20,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:20,203 INFO L482 AbstractCegarLoop]: Abstraction has 3420 states and 13234 transitions. [2021-06-05 22:44:20,203 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) [2021-06-05 22:44:20,203 INFO L276 IsEmpty]: Start isEmpty. Operand 3420 states and 13234 transitions. [2021-06-05 22:44:20,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:44:20,208 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:20,208 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:20,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable716 [2021-06-05 22:44:20,408 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:44:20,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:20,409 INFO L82 PathProgramCache]: Analyzing trace with hash 2077418130, now seen corresponding path program 234 times [2021-06-05 22:44:20,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:20,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357031433] [2021-06-05 22:44:20,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:20,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:20,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:20,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357031433] [2021-06-05 22:44:20,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357031433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:20,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871976676] [2021-06-05 22:44:20,587 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 [2021-06-05 22:44:20,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:44:20,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:20,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:44:20,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:20,734 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:20,734 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 [2021-06-05 22:44:20,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:20,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:20,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:20,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:44:20,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:20,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871976676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:20,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:20,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:44:20,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778570650] [2021-06-05 22:44:20,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:44:20,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:20,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:44:20,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:44:20,831 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) [2021-06-05 22:44:21,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:21,950 INFO L93 Difference]: Finished difference Result 3932 states and 14799 transitions. [2021-06-05 22:44:21,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:44:21,950 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 [2021-06-05 22:44:21,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:21,956 INFO L225 Difference]: With dead ends: 3932 [2021-06-05 22:44:21,956 INFO L226 Difference]: Without dead ends: 3913 [2021-06-05 22:44:21,956 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1000.7ms TimeCoverageRelationStatistics Valid=368, Invalid=1612, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:44:21,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3913 states. [2021-06-05 22:44:21,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3913 to 3425. [2021-06-05 22:44:21,994 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) [2021-06-05 22:44:22,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3425 states to 3425 states and 13252 transitions. [2021-06-05 22:44:22,002 INFO L78 Accepts]: Start accepts. Automaton has 3425 states and 13252 transitions. Word has length 24 [2021-06-05 22:44:22,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:22,002 INFO L482 AbstractCegarLoop]: Abstraction has 3425 states and 13252 transitions. [2021-06-05 22:44:22,002 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) [2021-06-05 22:44:22,002 INFO L276 IsEmpty]: Start isEmpty. Operand 3425 states and 13252 transitions. [2021-06-05 22:44:22,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:44:22,007 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:22,007 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:22,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:22,209 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:44:22,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:22,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1243679690, now seen corresponding path program 235 times [2021-06-05 22:44:22,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:22,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146062734] [2021-06-05 22:44:22,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:22,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:22,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:22,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146062734] [2021-06-05 22:44:22,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146062734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:22,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025641053] [2021-06-05 22:44:22,383 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 [2021-06-05 22:44:22,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:22,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:44:22,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:22,511 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 21 treesize of output 13 [2021-06-05 22:44:22,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:22,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:22,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:22,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:44:22,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:22,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025641053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:22,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:22,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:44:22,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401522324] [2021-06-05 22:44:22,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:44:22,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:22,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:44:22,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:44:22,557 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) [2021-06-05 22:44:23,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:23,210 INFO L93 Difference]: Finished difference Result 3894 states and 14709 transitions. [2021-06-05 22:44:23,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:44:23,211 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 [2021-06-05 22:44:23,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:23,217 INFO L225 Difference]: With dead ends: 3894 [2021-06-05 22:44:23,217 INFO L226 Difference]: Without dead ends: 3882 [2021-06-05 22:44:23,217 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 596.0ms TimeCoverageRelationStatistics Valid=215, Invalid=975, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:44:23,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3882 states. [2021-06-05 22:44:23,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3882 to 3422. [2021-06-05 22:44:23,256 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) [2021-06-05 22:44:23,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3422 states to 3422 states and 13241 transitions. [2021-06-05 22:44:23,262 INFO L78 Accepts]: Start accepts. Automaton has 3422 states and 13241 transitions. Word has length 24 [2021-06-05 22:44:23,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:23,262 INFO L482 AbstractCegarLoop]: Abstraction has 3422 states and 13241 transitions. [2021-06-05 22:44:23,263 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) [2021-06-05 22:44:23,263 INFO L276 IsEmpty]: Start isEmpty. Operand 3422 states and 13241 transitions. [2021-06-05 22:44:23,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:44:23,267 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:23,267 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:23,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable720 [2021-06-05 22:44:23,467 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:44:23,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:23,468 INFO L82 PathProgramCache]: Analyzing trace with hash 411054290, now seen corresponding path program 236 times [2021-06-05 22:44:23,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:23,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009454076] [2021-06-05 22:44:23,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:23,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:23,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:23,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:23,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009454076] [2021-06-05 22:44:23,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009454076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:23,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811961261] [2021-06-05 22:44:23,637 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 [2021-06-05 22:44:23,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:44:23,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:23,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:44:23,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:23,767 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:23,767 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:44:23,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:23,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:23,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:23,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 22:44:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:23,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811961261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:23,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:23,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:44:23,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873010748] [2021-06-05 22:44:23,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:44:23,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:23,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:44:23,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:44:23,878 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) [2021-06-05 22:44:24,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:24,921 INFO L93 Difference]: Finished difference Result 3835 states and 14527 transitions. [2021-06-05 22:44:24,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:44:24,921 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 [2021-06-05 22:44:24,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:24,928 INFO L225 Difference]: With dead ends: 3835 [2021-06-05 22:44:24,928 INFO L226 Difference]: Without dead ends: 3826 [2021-06-05 22:44:24,928 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 836.3ms TimeCoverageRelationStatistics Valid=283, Invalid=1523, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:44:24,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3826 states. [2021-06-05 22:44:24,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3826 to 3424. [2021-06-05 22:44:24,968 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) [2021-06-05 22:44:24,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3424 states to 3424 states and 13248 transitions. [2021-06-05 22:44:24,975 INFO L78 Accepts]: Start accepts. Automaton has 3424 states and 13248 transitions. Word has length 24 [2021-06-05 22:44:24,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:24,975 INFO L482 AbstractCegarLoop]: Abstraction has 3424 states and 13248 transitions. [2021-06-05 22:44:24,975 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) [2021-06-05 22:44:24,975 INFO L276 IsEmpty]: Start isEmpty. Operand 3424 states and 13248 transitions. [2021-06-05 22:44:24,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:44:24,980 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:24,980 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:25,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable721,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:25,180 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:44:25,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:25,180 INFO L82 PathProgramCache]: Analyzing trace with hash 734640468, now seen corresponding path program 237 times [2021-06-05 22:44:25,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:25,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815063190] [2021-06-05 22:44:25,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:25,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:25,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:25,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815063190] [2021-06-05 22:44:25,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815063190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:25,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287157531] [2021-06-05 22:44:25,361 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 [2021-06-05 22:44:25,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:44:25,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:25,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:44:25,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:25,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:25,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:25,510 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 [2021-06-05 22:44:25,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:25,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:25,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:25,529 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:49 [2021-06-05 22:44:25,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:25,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287157531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:25,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:25,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 22:44:25,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776555985] [2021-06-05 22:44:25,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:44:25,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:25,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:44:25,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:44:25,713 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) [2021-06-05 22:44:27,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:27,109 INFO L93 Difference]: Finished difference Result 3901 states and 14689 transitions. [2021-06-05 22:44:27,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:44:27,109 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 [2021-06-05 22:44:27,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:27,116 INFO L225 Difference]: With dead ends: 3901 [2021-06-05 22:44:27,116 INFO L226 Difference]: Without dead ends: 3890 [2021-06-05 22:44:27,116 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1209.7ms TimeCoverageRelationStatistics Valid=408, Invalid=1944, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 22:44:27,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3890 states. [2021-06-05 22:44:27,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3890 to 3430. [2021-06-05 22:44:27,158 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) [2021-06-05 22:44:27,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 13274 transitions. [2021-06-05 22:44:27,165 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 13274 transitions. Word has length 24 [2021-06-05 22:44:27,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:27,165 INFO L482 AbstractCegarLoop]: Abstraction has 3430 states and 13274 transitions. [2021-06-05 22:44:27,165 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) [2021-06-05 22:44:27,165 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 13274 transitions. [2021-06-05 22:44:27,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:44:27,169 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:27,170 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:27,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable723 [2021-06-05 22:44:27,370 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:44:27,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:27,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1874582706, now seen corresponding path program 238 times [2021-06-05 22:44:27,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:27,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587932994] [2021-06-05 22:44:27,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:27,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:27,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:27,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:27,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587932994] [2021-06-05 22:44:27,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587932994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:27,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513135458] [2021-06-05 22:44:27,550 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 [2021-06-05 22:44:27,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:44:27,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:27,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:44:27,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:27,667 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 21 treesize of output 13 [2021-06-05 22:44:27,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:27,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:27,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:27,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:44:27,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:27,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513135458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:27,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:27,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:44:27,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246924718] [2021-06-05 22:44:27,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:44:27,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:27,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:44:27,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:44:27,737 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) [2021-06-05 22:44:28,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:28,414 INFO L93 Difference]: Finished difference Result 3785 states and 14377 transitions. [2021-06-05 22:44:28,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:44:28,415 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 [2021-06-05 22:44:28,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:28,421 INFO L225 Difference]: With dead ends: 3785 [2021-06-05 22:44:28,422 INFO L226 Difference]: Without dead ends: 3774 [2021-06-05 22:44:28,422 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 606.3ms TimeCoverageRelationStatistics Valid=202, Invalid=920, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:44:28,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3774 states. [2021-06-05 22:44:28,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3774 to 3429. [2021-06-05 22:44:28,466 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) [2021-06-05 22:44:28,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 13269 transitions. [2021-06-05 22:44:28,473 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 13269 transitions. Word has length 24 [2021-06-05 22:44:28,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:28,473 INFO L482 AbstractCegarLoop]: Abstraction has 3429 states and 13269 transitions. [2021-06-05 22:44:28,474 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) [2021-06-05 22:44:28,474 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 13269 transitions. [2021-06-05 22:44:28,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:44:28,479 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:28,479 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:28,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable728,364 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:28,680 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:44:28,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:28,680 INFO L82 PathProgramCache]: Analyzing trace with hash 708131106, now seen corresponding path program 239 times [2021-06-05 22:44:28,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:28,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487525893] [2021-06-05 22:44:28,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:28,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:28,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:28,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:28,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487525893] [2021-06-05 22:44:28,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487525893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:28,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636915171] [2021-06-05 22:44:28,860 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 [2021-06-05 22:44:28,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:44:28,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:28,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:44:28,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:28,974 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 [2021-06-05 22:44:28,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:28,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:28,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:28,979 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:44:29,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:29,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636915171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:29,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:29,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:44:29,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16928549] [2021-06-05 22:44:29,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:44:29,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:29,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:44:29,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:44:29,033 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) [2021-06-05 22:44:29,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:29,857 INFO L93 Difference]: Finished difference Result 3822 states and 14496 transitions. [2021-06-05 22:44:29,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:44:29,857 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 [2021-06-05 22:44:29,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:29,864 INFO L225 Difference]: With dead ends: 3822 [2021-06-05 22:44:29,864 INFO L226 Difference]: Without dead ends: 3813 [2021-06-05 22:44:29,865 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 690.0ms TimeCoverageRelationStatistics Valid=259, Invalid=1223, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:44:29,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2021-06-05 22:44:29,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 3430. [2021-06-05 22:44:29,923 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) [2021-06-05 22:44:29,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 13273 transitions. [2021-06-05 22:44:29,931 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 13273 transitions. Word has length 24 [2021-06-05 22:44:29,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:29,932 INFO L482 AbstractCegarLoop]: Abstraction has 3430 states and 13273 transitions. [2021-06-05 22:44:29,932 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) [2021-06-05 22:44:29,932 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 13273 transitions. [2021-06-05 22:44:29,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:44:29,937 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:29,937 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:30,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable729,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:30,137 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:44:30,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:30,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1082730068, now seen corresponding path program 240 times [2021-06-05 22:44:30,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:30,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092801961] [2021-06-05 22:44:30,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:30,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:30,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:30,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092801961] [2021-06-05 22:44:30,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092801961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:30,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500856492] [2021-06-05 22:44:30,322 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 [2021-06-05 22:44:30,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:44:30,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:30,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:44:30,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:30,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:30,451 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 [2021-06-05 22:44:30,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:30,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:30,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:30,463 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 22:44:30,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:30,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500856492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:30,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:30,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:44:30,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304720265] [2021-06-05 22:44:30,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:44:30,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:30,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:44:30,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:44:30,552 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) [2021-06-05 22:44:31,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:31,342 INFO L93 Difference]: Finished difference Result 3812 states and 14469 transitions. [2021-06-05 22:44:31,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:44:31,342 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 [2021-06-05 22:44:31,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:31,349 INFO L225 Difference]: With dead ends: 3812 [2021-06-05 22:44:31,349 INFO L226 Difference]: Without dead ends: 3802 [2021-06-05 22:44:31,349 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 706.3ms TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:44:31,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3802 states. [2021-06-05 22:44:31,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3802 to 3429. [2021-06-05 22:44:31,394 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) [2021-06-05 22:44:31,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 13269 transitions. [2021-06-05 22:44:31,402 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 13269 transitions. Word has length 24 [2021-06-05 22:44:31,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:31,402 INFO L482 AbstractCegarLoop]: Abstraction has 3429 states and 13269 transitions. [2021-06-05 22:44:31,402 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) [2021-06-05 22:44:31,402 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 13269 transitions. [2021-06-05 22:44:31,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:44:31,407 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:31,407 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:31,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable730 [2021-06-05 22:44:31,608 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:44:31,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:31,608 INFO L82 PathProgramCache]: Analyzing trace with hash 644159276, now seen corresponding path program 241 times [2021-06-05 22:44:31,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:31,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983087170] [2021-06-05 22:44:31,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:31,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:31,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:31,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983087170] [2021-06-05 22:44:31,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983087170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:31,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443093580] [2021-06-05 22:44:31,806 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 [2021-06-05 22:44:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:31,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:44:31,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:31,919 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 [2021-06-05 22:44:31,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:31,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:31,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:31,923 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:44:31,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:31,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443093580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:31,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:31,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:44:31,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985419094] [2021-06-05 22:44:31,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:44:31,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:31,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:44:31,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:44:31,979 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) [2021-06-05 22:44:32,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:32,662 INFO L93 Difference]: Finished difference Result 3817 states and 14487 transitions. [2021-06-05 22:44:32,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:44:32,663 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 [2021-06-05 22:44:32,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:32,669 INFO L225 Difference]: With dead ends: 3817 [2021-06-05 22:44:32,669 INFO L226 Difference]: Without dead ends: 3806 [2021-06-05 22:44:32,670 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 587.3ms TimeCoverageRelationStatistics Valid=228, Invalid=1032, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:44:32,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2021-06-05 22:44:32,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 3431. [2021-06-05 22:44:32,711 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) [2021-06-05 22:44:32,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3431 states to 3431 states and 13275 transitions. [2021-06-05 22:44:32,718 INFO L78 Accepts]: Start accepts. Automaton has 3431 states and 13275 transitions. Word has length 24 [2021-06-05 22:44:32,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:32,718 INFO L482 AbstractCegarLoop]: Abstraction has 3431 states and 13275 transitions. [2021-06-05 22:44:32,718 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) [2021-06-05 22:44:32,718 INFO L276 IsEmpty]: Start isEmpty. Operand 3431 states and 13275 transitions. [2021-06-05 22:44:32,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:44:32,723 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:32,723 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:32,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable732,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:32,923 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:44:32,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:32,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1623573724, now seen corresponding path program 242 times [2021-06-05 22:44:32,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:32,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854200580] [2021-06-05 22:44:32,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:32,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:33,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:33,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:33,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854200580] [2021-06-05 22:44:33,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854200580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:33,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625327361] [2021-06-05 22:44:33,099 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 [2021-06-05 22:44:33,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:44:33,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:33,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:44:33,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:33,253 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:33,254 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 [2021-06-05 22:44:33,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:33,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:33,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:33,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 22:44:33,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:33,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625327361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:33,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:33,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:44:33,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271409642] [2021-06-05 22:44:33,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:44:33,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:33,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:44:33,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:44:33,375 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) [2021-06-05 22:44:34,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:34,384 INFO L93 Difference]: Finished difference Result 3830 states and 14517 transitions. [2021-06-05 22:44:34,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:44:34,385 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 [2021-06-05 22:44:34,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:34,391 INFO L225 Difference]: With dead ends: 3830 [2021-06-05 22:44:34,392 INFO L226 Difference]: Without dead ends: 3819 [2021-06-05 22:44:34,392 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 857.3ms TimeCoverageRelationStatistics Valid=281, Invalid=1359, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:44:34,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3819 states. [2021-06-05 22:44:34,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3819 to 3430. [2021-06-05 22:44:34,435 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) [2021-06-05 22:44:34,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 13273 transitions. [2021-06-05 22:44:34,443 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 13273 transitions. Word has length 24 [2021-06-05 22:44:34,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:34,443 INFO L482 AbstractCegarLoop]: Abstraction has 3430 states and 13273 transitions. [2021-06-05 22:44:34,443 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) [2021-06-05 22:44:34,443 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 13273 transitions. [2021-06-05 22:44:34,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:44:34,448 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:34,448 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:34,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable733 [2021-06-05 22:44:34,648 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:44:34,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:34,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1373271240, now seen corresponding path program 243 times [2021-06-05 22:44:34,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:34,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903535055] [2021-06-05 22:44:34,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:34,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:34,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:34,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:34,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903535055] [2021-06-05 22:44:34,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903535055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:34,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359355444] [2021-06-05 22:44:34,845 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 [2021-06-05 22:44:34,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:44:34,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:34,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:44:34,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:35,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:35,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:35,087 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 [2021-06-05 22:44:35,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:35,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:35,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:35,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 22:44:35,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:35,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359355444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:35,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:35,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:44:35,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628899156] [2021-06-05 22:44:35,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:44:35,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:35,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:44:35,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:44:35,121 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) [2021-06-05 22:44:38,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:38,979 INFO L93 Difference]: Finished difference Result 5894 states and 21603 transitions. [2021-06-05 22:44:38,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 22:44:38,980 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 [2021-06-05 22:44:38,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:38,989 INFO L225 Difference]: With dead ends: 5894 [2021-06-05 22:44:38,989 INFO L226 Difference]: Without dead ends: 5874 [2021-06-05 22:44:38,989 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2910 ImplicationChecksByTransitivity, 3239.5ms TimeCoverageRelationStatistics Valid=1122, Invalid=7434, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 22:44:38,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5874 states. [2021-06-05 22:44:39,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5874 to 3430. [2021-06-05 22:44:39,043 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) [2021-06-05 22:44:39,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 13273 transitions. [2021-06-05 22:44:39,050 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 13273 transitions. Word has length 24 [2021-06-05 22:44:39,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:39,050 INFO L482 AbstractCegarLoop]: Abstraction has 3430 states and 13273 transitions. [2021-06-05 22:44:39,050 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) [2021-06-05 22:44:39,050 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 13273 transitions. [2021-06-05 22:44:39,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:44:39,055 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:39,055 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:39,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable735,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:39,257 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:44:39,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:39,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1080747266, now seen corresponding path program 244 times [2021-06-05 22:44:39,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:39,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277795775] [2021-06-05 22:44:39,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:39,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:39,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:39,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277795775] [2021-06-05 22:44:39,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277795775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:39,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883178883] [2021-06-05 22:44:39,445 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 [2021-06-05 22:44:39,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:44:39,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:39,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:44:39,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:39,607 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 [2021-06-05 22:44:39,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:39,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:39,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:39,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 22:44:39,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:39,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883178883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:39,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:39,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:44:39,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389053125] [2021-06-05 22:44:39,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:44:39,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:39,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:44:39,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:44:39,638 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) [2021-06-05 22:44:42,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:42,753 INFO L93 Difference]: Finished difference Result 4990 states and 18316 transitions. [2021-06-05 22:44:42,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 22:44:42,753 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 [2021-06-05 22:44:42,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:42,761 INFO L225 Difference]: With dead ends: 4990 [2021-06-05 22:44:42,761 INFO L226 Difference]: Without dead ends: 4962 [2021-06-05 22:44:42,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1993 ImplicationChecksByTransitivity, 2309.0ms TimeCoverageRelationStatistics Valid=878, Invalid=5602, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 22:44:42,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4962 states. [2021-06-05 22:44:42,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4962 to 3435. [2021-06-05 22:44:42,809 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) [2021-06-05 22:44:42,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 13289 transitions. [2021-06-05 22:44:42,816 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 13289 transitions. Word has length 24 [2021-06-05 22:44:42,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:42,816 INFO L482 AbstractCegarLoop]: Abstraction has 3435 states and 13289 transitions. [2021-06-05 22:44:42,816 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) [2021-06-05 22:44:42,817 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 13289 transitions. [2021-06-05 22:44:42,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:44:42,821 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:42,821 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:43,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable736,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:43,022 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:44:43,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:43,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1071844342, now seen corresponding path program 245 times [2021-06-05 22:44:43,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:43,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104693876] [2021-06-05 22:44:43,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:43,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:43,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:43,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:43,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104693876] [2021-06-05 22:44:43,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104693876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:43,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373192118] [2021-06-05 22:44:43,202 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 [2021-06-05 22:44:43,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:44:43,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:43,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:44:43,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:43,361 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 [2021-06-05 22:44:43,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:43,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:43,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:43,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:44:43,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:43,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373192118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:43,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:43,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:44:43,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383233710] [2021-06-05 22:44:43,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:44:43,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:43,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:44:43,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:44:43,390 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) [2021-06-05 22:44:45,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:45,953 INFO L93 Difference]: Finished difference Result 4925 states and 18087 transitions. [2021-06-05 22:44:45,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 22:44:45,954 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 [2021-06-05 22:44:45,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:45,962 INFO L225 Difference]: With dead ends: 4925 [2021-06-05 22:44:45,962 INFO L226 Difference]: Without dead ends: 4886 [2021-06-05 22:44:45,963 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1893.6ms TimeCoverageRelationStatistics Valid=607, Invalid=3683, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 22:44:45,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4886 states. [2021-06-05 22:44:46,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4886 to 3438. [2021-06-05 22:44:46,024 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) [2021-06-05 22:44:46,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 13297 transitions. [2021-06-05 22:44:46,031 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 13297 transitions. Word has length 24 [2021-06-05 22:44:46,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:46,031 INFO L482 AbstractCegarLoop]: Abstraction has 3438 states and 13297 transitions. [2021-06-05 22:44:46,031 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) [2021-06-05 22:44:46,031 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 13297 transitions. [2021-06-05 22:44:46,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:44:46,036 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:46,037 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:46,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable737 [2021-06-05 22:44:46,237 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:44:46,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:46,237 INFO L82 PathProgramCache]: Analyzing trace with hash 864399170, now seen corresponding path program 246 times [2021-06-05 22:44:46,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:46,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604674912] [2021-06-05 22:44:46,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:46,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:46,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:46,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:46,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604674912] [2021-06-05 22:44:46,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604674912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:46,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514290897] [2021-06-05 22:44:46,413 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 [2021-06-05 22:44:46,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:44:46,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:46,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:44:46,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:46,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:46,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:46,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:46,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:46,642 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 [2021-06-05 22:44:46,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:44:46,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:46,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:46,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:18 [2021-06-05 22:44:46,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:46,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514290897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:46,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:46,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:44:46,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265275447] [2021-06-05 22:44:46,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:44:46,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:46,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:44:46,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:44:46,718 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) [2021-06-05 22:44:48,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:48,892 INFO L93 Difference]: Finished difference Result 4581 states and 17132 transitions. [2021-06-05 22:44:48,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:44:48,892 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 [2021-06-05 22:44:48,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:48,901 INFO L225 Difference]: With dead ends: 4581 [2021-06-05 22:44:48,901 INFO L226 Difference]: Without dead ends: 4562 [2021-06-05 22:44:48,901 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1815.4ms TimeCoverageRelationStatistics Valid=567, Invalid=2973, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 22:44:48,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4562 states. [2021-06-05 22:44:48,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4562 to 3434. [2021-06-05 22:44:48,953 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) [2021-06-05 22:44:48,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 13289 transitions. [2021-06-05 22:44:48,961 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 13289 transitions. Word has length 24 [2021-06-05 22:44:48,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:48,961 INFO L482 AbstractCegarLoop]: Abstraction has 3434 states and 13289 transitions. [2021-06-05 22:44:48,961 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) [2021-06-05 22:44:48,961 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 13289 transitions. [2021-06-05 22:44:48,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:44:48,967 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:48,967 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:49,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable738,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:49,167 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:44:49,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:49,170 INFO L82 PathProgramCache]: Analyzing trace with hash 687857738, now seen corresponding path program 247 times [2021-06-05 22:44:49,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:49,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794748021] [2021-06-05 22:44:49,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:49,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:49,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:49,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794748021] [2021-06-05 22:44:49,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794748021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:49,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405616522] [2021-06-05 22:44:49,344 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 [2021-06-05 22:44:49,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:49,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:44:49,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:49,473 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 [2021-06-05 22:44:49,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:49,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:49,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:49,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:44:49,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:49,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405616522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:49,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:49,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:44:49,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370817596] [2021-06-05 22:44:49,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:44:49,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:49,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:44:49,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:44:49,520 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) [2021-06-05 22:44:50,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:50,610 INFO L93 Difference]: Finished difference Result 4592 states and 17139 transitions. [2021-06-05 22:44:50,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:44:50,611 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 [2021-06-05 22:44:50,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:50,620 INFO L225 Difference]: With dead ends: 4592 [2021-06-05 22:44:50,620 INFO L226 Difference]: Without dead ends: 4583 [2021-06-05 22:44:50,621 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 843.2ms TimeCoverageRelationStatistics Valid=306, Invalid=1500, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:44:50,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4583 states. [2021-06-05 22:44:50,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4583 to 3439. [2021-06-05 22:44:50,673 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) [2021-06-05 22:44:50,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3439 states to 3439 states and 13303 transitions. [2021-06-05 22:44:50,681 INFO L78 Accepts]: Start accepts. Automaton has 3439 states and 13303 transitions. Word has length 24 [2021-06-05 22:44:50,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:50,681 INFO L482 AbstractCegarLoop]: Abstraction has 3439 states and 13303 transitions. [2021-06-05 22:44:50,681 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) [2021-06-05 22:44:50,682 INFO L276 IsEmpty]: Start isEmpty. Operand 3439 states and 13303 transitions. [2021-06-05 22:44:50,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:44:50,687 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:50,687 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:50,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable742 [2021-06-05 22:44:50,887 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:44:50,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:50,888 INFO L82 PathProgramCache]: Analyzing trace with hash -145880702, now seen corresponding path program 248 times [2021-06-05 22:44:50,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:50,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518173584] [2021-06-05 22:44:50,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:51,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:51,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:51,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518173584] [2021-06-05 22:44:51,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518173584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:51,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847888628] [2021-06-05 22:44:51,058 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 [2021-06-05 22:44:51,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:44:51,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:51,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:44:51,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:51,202 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:51,202 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 [2021-06-05 22:44:51,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:51,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:51,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:51,212 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:44:51,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:51,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847888628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:51,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:51,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:44:51,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668262275] [2021-06-05 22:44:51,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:44:51,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:51,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:44:51,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:44:51,304 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) [2021-06-05 22:44:53,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:53,665 INFO L93 Difference]: Finished difference Result 4712 states and 17417 transitions. [2021-06-05 22:44:53,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 22:44:53,666 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 [2021-06-05 22:44:53,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:53,673 INFO L225 Difference]: With dead ends: 4712 [2021-06-05 22:44:53,673 INFO L226 Difference]: Without dead ends: 4702 [2021-06-05 22:44:53,673 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 1993.4ms TimeCoverageRelationStatistics Valid=636, Invalid=3270, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 22:44:53,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4702 states. [2021-06-05 22:44:53,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4702 to 3436. [2021-06-05 22:44:53,717 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) [2021-06-05 22:44:53,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3436 states to 3436 states and 13297 transitions. [2021-06-05 22:44:53,724 INFO L78 Accepts]: Start accepts. Automaton has 3436 states and 13297 transitions. Word has length 24 [2021-06-05 22:44:53,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:53,724 INFO L482 AbstractCegarLoop]: Abstraction has 3436 states and 13297 transitions. [2021-06-05 22:44:53,724 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) [2021-06-05 22:44:53,724 INFO L276 IsEmpty]: Start isEmpty. Operand 3436 states and 13297 transitions. [2021-06-05 22:44:53,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:44:53,728 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:53,728 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:53,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable743 [2021-06-05 22:44:53,929 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:44:53,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:53,929 INFO L82 PathProgramCache]: Analyzing trace with hash 635953098, now seen corresponding path program 249 times [2021-06-05 22:44:53,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:53,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539714396] [2021-06-05 22:44:53,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:53,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:54,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:54,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:54,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539714396] [2021-06-05 22:44:54,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539714396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:54,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861223594] [2021-06-05 22:44:54,096 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 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 [2021-06-05 22:44:54,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:44:54,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:54,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:44:54,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:54,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:54,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:54,269 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 [2021-06-05 22:44:54,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:54,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:54,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:54,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:7 [2021-06-05 22:44:54,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:54,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861223594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:54,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:54,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 22:44:54,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133871909] [2021-06-05 22:44:54,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:44:54,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:54,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:44:54,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:44:54,317 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) [2021-06-05 22:44:55,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:55,814 INFO L93 Difference]: Finished difference Result 4517 states and 16899 transitions. [2021-06-05 22:44:55,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:44:55,814 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 [2021-06-05 22:44:55,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:55,822 INFO L225 Difference]: With dead ends: 4517 [2021-06-05 22:44:55,822 INFO L226 Difference]: Without dead ends: 4507 [2021-06-05 22:44:55,822 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1233.7ms TimeCoverageRelationStatistics Valid=390, Invalid=2160, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:44:55,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4507 states. [2021-06-05 22:44:55,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4507 to 3430. [2021-06-05 22:44:55,870 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) [2021-06-05 22:44:55,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 13273 transitions. [2021-06-05 22:44:55,877 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 13273 transitions. Word has length 24 [2021-06-05 22:44:55,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:55,877 INFO L482 AbstractCegarLoop]: Abstraction has 3430 states and 13273 transitions. [2021-06-05 22:44:55,877 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) [2021-06-05 22:44:55,878 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 13273 transitions. [2021-06-05 22:44:55,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:44:55,883 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:55,883 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:56,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable746,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:56,083 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:44:56,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:56,083 INFO L82 PathProgramCache]: Analyzing trace with hash -305635602, now seen corresponding path program 21 times [2021-06-05 22:44:56,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:56,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328502121] [2021-06-05 22:44:56,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:56,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:56,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:56,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:56,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328502121] [2021-06-05 22:44:56,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328502121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:56,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417948746] [2021-06-05 22:44:56,243 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 [2021-06-05 22:44:56,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:44:56,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:56,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:44:56,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:56,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:44:56,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:44:56,464 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 [2021-06-05 22:44:56,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:44:56,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:44:56,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:44:56,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 22:44:56,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:56,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417948746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:56,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:56,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:44:56,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933181190] [2021-06-05 22:44:56,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:44:56,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:56,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:44:56,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:44:56,499 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) [2021-06-05 22:45:00,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:00,119 INFO L93 Difference]: Finished difference Result 5710 states and 20952 transitions. [2021-06-05 22:45:00,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 22:45:00,119 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 [2021-06-05 22:45:00,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:00,129 INFO L225 Difference]: With dead ends: 5710 [2021-06-05 22:45:00,129 INFO L226 Difference]: Without dead ends: 5688 [2021-06-05 22:45:00,130 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2936 ImplicationChecksByTransitivity, 3099.9ms TimeCoverageRelationStatistics Valid=1127, Invalid=7615, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 22:45:00,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5688 states. [2021-06-05 22:45:00,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5688 to 3430. [2021-06-05 22:45:00,197 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) [2021-06-05 22:45:00,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 13273 transitions. [2021-06-05 22:45:00,204 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 13273 transitions. Word has length 24 [2021-06-05 22:45:00,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:00,204 INFO L482 AbstractCegarLoop]: Abstraction has 3430 states and 13273 transitions. [2021-06-05 22:45:00,204 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) [2021-06-05 22:45:00,204 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 13273 transitions. [2021-06-05 22:45:00,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:45:00,209 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:00,209 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:00,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable747 [2021-06-05 22:45:00,411 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:45:00,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:00,411 INFO L82 PathProgramCache]: Analyzing trace with hash -815151466, now seen corresponding path program 22 times [2021-06-05 22:45:00,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:00,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056404216] [2021-06-05 22:45:00,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:00,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:00,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:00,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056404216] [2021-06-05 22:45:00,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056404216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:00,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247191012] [2021-06-05 22:45:00,583 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 [2021-06-05 22:45:00,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:45:00,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:00,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:45:00,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:00,750 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 [2021-06-05 22:45:00,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:00,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:00,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:00,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:45:00,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:00,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247191012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:00,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:00,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:45:00,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036303410] [2021-06-05 22:45:00,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:45:00,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:00,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:45:00,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:45:00,781 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) [2021-06-05 22:45:04,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:04,010 INFO L93 Difference]: Finished difference Result 4808 states and 17690 transitions. [2021-06-05 22:45:04,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 22:45:04,011 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 [2021-06-05 22:45:04,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:04,019 INFO L225 Difference]: With dead ends: 4808 [2021-06-05 22:45:04,019 INFO L226 Difference]: Without dead ends: 4779 [2021-06-05 22:45:04,020 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2011 ImplicationChecksByTransitivity, 2304.0ms TimeCoverageRelationStatistics Valid=878, Invalid=5602, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 22:45:04,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4779 states. [2021-06-05 22:45:04,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4779 to 3437. [2021-06-05 22:45:04,068 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) [2021-06-05 22:45:04,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3437 states to 3437 states and 13297 transitions. [2021-06-05 22:45:04,076 INFO L78 Accepts]: Start accepts. Automaton has 3437 states and 13297 transitions. Word has length 24 [2021-06-05 22:45:04,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:04,076 INFO L482 AbstractCegarLoop]: Abstraction has 3437 states and 13297 transitions. [2021-06-05 22:45:04,076 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) [2021-06-05 22:45:04,076 INFO L276 IsEmpty]: Start isEmpty. Operand 3437 states and 13297 transitions. [2021-06-05 22:45:04,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:45:04,081 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:04,081 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:04,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable748,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:04,296 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:45:04,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:04,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1024688846, now seen corresponding path program 23 times [2021-06-05 22:45:04,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:04,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003384410] [2021-06-05 22:45:04,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:04,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:04,487 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:04,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:04,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003384410] [2021-06-05 22:45:04,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003384410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:04,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986610701] [2021-06-05 22:45:04,487 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 [2021-06-05 22:45:04,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:45:04,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:04,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:45:04,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:04,678 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 [2021-06-05 22:45:04,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:04,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:04,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:04,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:45:04,706 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:04,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986610701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:04,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:04,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:45:04,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409437857] [2021-06-05 22:45:04,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:45:04,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:04,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:45:04,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:45:04,707 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) [2021-06-05 22:45:07,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:07,418 INFO L93 Difference]: Finished difference Result 4743 states and 17460 transitions. [2021-06-05 22:45:07,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 22:45:07,419 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 [2021-06-05 22:45:07,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:07,427 INFO L225 Difference]: With dead ends: 4743 [2021-06-05 22:45:07,427 INFO L226 Difference]: Without dead ends: 4703 [2021-06-05 22:45:07,428 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 1991.0ms TimeCoverageRelationStatistics Valid=607, Invalid=3683, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 22:45:07,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4703 states. [2021-06-05 22:45:07,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4703 to 3440. [2021-06-05 22:45:07,483 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) [2021-06-05 22:45:07,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3440 states to 3440 states and 13307 transitions. [2021-06-05 22:45:07,492 INFO L78 Accepts]: Start accepts. Automaton has 3440 states and 13307 transitions. Word has length 24 [2021-06-05 22:45:07,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:07,492 INFO L482 AbstractCegarLoop]: Abstraction has 3440 states and 13307 transitions. [2021-06-05 22:45:07,492 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) [2021-06-05 22:45:07,492 INFO L276 IsEmpty]: Start isEmpty. Operand 3440 states and 13307 transitions. [2021-06-05 22:45:07,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:45:07,497 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:07,497 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:07,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable749,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:07,698 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:45:07,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:07,698 INFO L82 PathProgramCache]: Analyzing trace with hash 703982900, now seen corresponding path program 24 times [2021-06-05 22:45:07,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:07,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855328544] [2021-06-05 22:45:07,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:07,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:07,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:07,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:07,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855328544] [2021-06-05 22:45:07,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855328544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:07,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60585214] [2021-06-05 22:45:07,886 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 [2021-06-05 22:45:07,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:45:07,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:07,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:45:07,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:08,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:08,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:08,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:08,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:08,170 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 [2021-06-05 22:45:08,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:45:08,193 INFO L628 ElimStorePlain]: treesize reduction 27, result has 47.1 percent of original size [2021-06-05 22:45:08,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:08,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:18 [2021-06-05 22:45:08,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:08,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60585214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:08,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:08,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:45:08,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137566961] [2021-06-05 22:45:08,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:45:08,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:08,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:45:08,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:45:08,259 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) [2021-06-05 22:45:09,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:09,852 INFO L93 Difference]: Finished difference Result 4481 states and 16783 transitions. [2021-06-05 22:45:09,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:45:09,853 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 [2021-06-05 22:45:09,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:09,861 INFO L225 Difference]: With dead ends: 4481 [2021-06-05 22:45:09,861 INFO L226 Difference]: Without dead ends: 4462 [2021-06-05 22:45:09,861 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1439.6ms TimeCoverageRelationStatistics Valid=403, Invalid=2353, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 22:45:09,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4462 states. [2021-06-05 22:45:09,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4462 to 3435. [2021-06-05 22:45:09,911 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) [2021-06-05 22:45:09,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 13293 transitions. [2021-06-05 22:45:09,919 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 13293 transitions. Word has length 24 [2021-06-05 22:45:09,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:09,919 INFO L482 AbstractCegarLoop]: Abstraction has 3435 states and 13293 transitions. [2021-06-05 22:45:09,920 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) [2021-06-05 22:45:09,920 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 13293 transitions. [2021-06-05 22:45:09,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:45:09,925 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:09,925 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:10,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable750,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:10,125 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:45:10,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:10,126 INFO L82 PathProgramCache]: Analyzing trace with hash -324166960, now seen corresponding path program 25 times [2021-06-05 22:45:10,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:10,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377833303] [2021-06-05 22:45:10,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:10,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:10,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:10,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:10,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377833303] [2021-06-05 22:45:10,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377833303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:10,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732356158] [2021-06-05 22:45:10,284 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 [2021-06-05 22:45:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:10,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:45:10,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:10,417 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 [2021-06-05 22:45:10,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:10,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:10,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:10,421 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:45:10,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:10,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732356158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:10,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:10,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:45:10,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27782566] [2021-06-05 22:45:10,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:45:10,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:10,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:45:10,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:45:10,465 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) [2021-06-05 22:45:11,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:11,571 INFO L93 Difference]: Finished difference Result 4403 states and 16490 transitions. [2021-06-05 22:45:11,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:45:11,571 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 [2021-06-05 22:45:11,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:11,579 INFO L225 Difference]: With dead ends: 4403 [2021-06-05 22:45:11,579 INFO L226 Difference]: Without dead ends: 4394 [2021-06-05 22:45:11,579 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 858.1ms TimeCoverageRelationStatistics Valid=306, Invalid=1500, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:45:11,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4394 states. [2021-06-05 22:45:11,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4394 to 3444. [2021-06-05 22:45:11,628 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) [2021-06-05 22:45:11,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3444 states to 3444 states and 13321 transitions. [2021-06-05 22:45:11,636 INFO L78 Accepts]: Start accepts. Automaton has 3444 states and 13321 transitions. Word has length 24 [2021-06-05 22:45:11,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:11,636 INFO L482 AbstractCegarLoop]: Abstraction has 3444 states and 13321 transitions. [2021-06-05 22:45:11,636 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) [2021-06-05 22:45:11,636 INFO L276 IsEmpty]: Start isEmpty. Operand 3444 states and 13321 transitions. [2021-06-05 22:45:11,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:45:11,642 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:11,642 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:11,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable754,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:11,842 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:45:11,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:11,842 INFO L82 PathProgramCache]: Analyzing trace with hash -580782, now seen corresponding path program 26 times [2021-06-05 22:45:11,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:11,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147362020] [2021-06-05 22:45:11,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:11,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:12,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:12,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:12,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147362020] [2021-06-05 22:45:12,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147362020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:12,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46435563] [2021-06-05 22:45:12,002 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 [2021-06-05 22:45:12,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:45:12,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:12,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:45:12,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:12,155 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:12,155 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:45:12,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:12,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:12,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:12,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:45:12,257 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:12,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46435563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:12,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:12,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:45:12,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873455980] [2021-06-05 22:45:12,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:45:12,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:12,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:45:12,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:45:12,258 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) [2021-06-05 22:45:14,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:14,650 INFO L93 Difference]: Finished difference Result 4536 states and 16812 transitions. [2021-06-05 22:45:14,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 22:45:14,650 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 [2021-06-05 22:45:14,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:14,659 INFO L225 Difference]: With dead ends: 4536 [2021-06-05 22:45:14,659 INFO L226 Difference]: Without dead ends: 4525 [2021-06-05 22:45:14,659 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 2033.1ms TimeCoverageRelationStatistics Valid=636, Invalid=3270, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 22:45:14,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4525 states. [2021-06-05 22:45:14,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4525 to 3446. [2021-06-05 22:45:14,711 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) [2021-06-05 22:45:14,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3446 states to 3446 states and 13327 transitions. [2021-06-05 22:45:14,719 INFO L78 Accepts]: Start accepts. Automaton has 3446 states and 13327 transitions. Word has length 24 [2021-06-05 22:45:14,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:14,719 INFO L482 AbstractCegarLoop]: Abstraction has 3446 states and 13327 transitions. [2021-06-05 22:45:14,719 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) [2021-06-05 22:45:14,719 INFO L276 IsEmpty]: Start isEmpty. Operand 3446 states and 13327 transitions. [2021-06-05 22:45:14,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:45:14,724 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:14,724 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:14,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable755 [2021-06-05 22:45:14,924 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:45:14,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:14,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1685163340, now seen corresponding path program 27 times [2021-06-05 22:45:14,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:14,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412057702] [2021-06-05 22:45:14,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:14,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:15,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:15,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:15,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412057702] [2021-06-05 22:45:15,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412057702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:15,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365961954] [2021-06-05 22:45:15,083 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 [2021-06-05 22:45:15,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:45:15,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:15,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:45:15,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:15,250 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:15,250 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 [2021-06-05 22:45:15,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:15,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:15,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:15,261 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:45:15,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:15,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365961954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:15,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:15,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 22:45:15,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691410287] [2021-06-05 22:45:15,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:45:15,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:15,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:45:15,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:45:15,337 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) [2021-06-05 22:45:17,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:17,333 INFO L93 Difference]: Finished difference Result 4381 states and 16352 transitions. [2021-06-05 22:45:17,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 22:45:17,333 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 [2021-06-05 22:45:17,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:17,340 INFO L225 Difference]: With dead ends: 4381 [2021-06-05 22:45:17,341 INFO L226 Difference]: Without dead ends: 4370 [2021-06-05 22:45:17,341 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 1675.5ms TimeCoverageRelationStatistics Valid=503, Invalid=2689, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 22:45:17,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4370 states. [2021-06-05 22:45:17,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4370 to 3430. [2021-06-05 22:45:17,386 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) [2021-06-05 22:45:17,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 13273 transitions. [2021-06-05 22:45:17,393 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 13273 transitions. Word has length 24 [2021-06-05 22:45:17,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:17,393 INFO L482 AbstractCegarLoop]: Abstraction has 3430 states and 13273 transitions. [2021-06-05 22:45:17,393 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) [2021-06-05 22:45:17,393 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 13273 transitions. [2021-06-05 22:45:17,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:45:17,398 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:17,398 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:17,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable758,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:17,598 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:45:17,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:17,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1006805604, now seen corresponding path program 250 times [2021-06-05 22:45:17,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:17,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288139100] [2021-06-05 22:45:17,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:17,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:17,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:17,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:17,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288139100] [2021-06-05 22:45:17,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288139100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:17,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340533744] [2021-06-05 22:45:17,777 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 [2021-06-05 22:45:17,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:45:17,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:17,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:45:17,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:17,951 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 [2021-06-05 22:45:17,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:17,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:17,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:17,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:45:17,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:17,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340533744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:17,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:17,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:45:17,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482843153] [2021-06-05 22:45:17,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:45:17,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:17,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:45:17,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:45:17,985 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) [2021-06-05 22:45:20,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:20,089 INFO L93 Difference]: Finished difference Result 4524 states and 16773 transitions. [2021-06-05 22:45:20,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 22:45:20,090 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 [2021-06-05 22:45:20,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:20,098 INFO L225 Difference]: With dead ends: 4524 [2021-06-05 22:45:20,098 INFO L226 Difference]: Without dead ends: 4506 [2021-06-05 22:45:20,098 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1388.5ms TimeCoverageRelationStatistics Valid=527, Invalid=3379, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 22:45:20,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4506 states. [2021-06-05 22:45:20,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4506 to 3431. [2021-06-05 22:45:20,150 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) [2021-06-05 22:45:20,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3431 states to 3431 states and 13276 transitions. [2021-06-05 22:45:20,158 INFO L78 Accepts]: Start accepts. Automaton has 3431 states and 13276 transitions. Word has length 24 [2021-06-05 22:45:20,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:20,158 INFO L482 AbstractCegarLoop]: Abstraction has 3431 states and 13276 transitions. [2021-06-05 22:45:20,158 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) [2021-06-05 22:45:20,158 INFO L276 IsEmpty]: Start isEmpty. Operand 3431 states and 13276 transitions. [2021-06-05 22:45:20,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:45:20,179 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:20,180 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:20,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable760 [2021-06-05 22:45:20,380 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:45:20,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:20,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1780079634, now seen corresponding path program 251 times [2021-06-05 22:45:20,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:20,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178824379] [2021-06-05 22:45:20,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:20,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:20,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:20,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:20,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178824379] [2021-06-05 22:45:20,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178824379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:20,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776687727] [2021-06-05 22:45:20,563 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 [2021-06-05 22:45:20,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:45:20,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:20,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:45:20,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:20,739 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 [2021-06-05 22:45:20,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:20,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:20,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:20,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:45:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:20,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776687727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:20,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:20,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:45:20,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841683519] [2021-06-05 22:45:20,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:45:20,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:20,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:45:20,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:45:20,769 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) [2021-06-05 22:45:23,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:23,176 INFO L93 Difference]: Finished difference Result 4585 states and 16896 transitions. [2021-06-05 22:45:23,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 22:45:23,177 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 [2021-06-05 22:45:23,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:23,184 INFO L225 Difference]: With dead ends: 4585 [2021-06-05 22:45:23,184 INFO L226 Difference]: Without dead ends: 4550 [2021-06-05 22:45:23,185 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 1655.1ms TimeCoverageRelationStatistics Valid=512, Invalid=3394, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 22:45:23,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4550 states. [2021-06-05 22:45:23,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4550 to 3435. [2021-06-05 22:45:23,230 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) [2021-06-05 22:45:23,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 13288 transitions. [2021-06-05 22:45:23,238 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 13288 transitions. Word has length 24 [2021-06-05 22:45:23,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:23,238 INFO L482 AbstractCegarLoop]: Abstraction has 3435 states and 13288 transitions. [2021-06-05 22:45:23,238 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) [2021-06-05 22:45:23,238 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 13288 transitions. [2021-06-05 22:45:23,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:45:23,243 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:23,243 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:23,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-06-05 22:45:23,444 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:45:23,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:23,444 INFO L82 PathProgramCache]: Analyzing trace with hash -578644150, now seen corresponding path program 252 times [2021-06-05 22:45:23,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:23,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785281290] [2021-06-05 22:45:23,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:23,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:23,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:23,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785281290] [2021-06-05 22:45:23,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785281290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:23,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577865973] [2021-06-05 22:45:23,608 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 [2021-06-05 22:45:23,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:45:23,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:23,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:45:23,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:23,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:23,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:23,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:23,808 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 [2021-06-05 22:45:23,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:45:23,831 INFO L628 ElimStorePlain]: treesize reduction 25, result has 46.8 percent of original size [2021-06-05 22:45:23,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:23,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-06-05 22:45:23,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:23,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577865973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:23,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:23,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:45:23,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529857698] [2021-06-05 22:45:23,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:45:23,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:23,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:45:23,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:45:23,892 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) [2021-06-05 22:45:26,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:26,105 INFO L93 Difference]: Finished difference Result 4544 states and 16857 transitions. [2021-06-05 22:45:26,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 22:45:26,105 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 [2021-06-05 22:45:26,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:26,114 INFO L225 Difference]: With dead ends: 4544 [2021-06-05 22:45:26,114 INFO L226 Difference]: Without dead ends: 4518 [2021-06-05 22:45:26,114 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 1810.5ms TimeCoverageRelationStatistics Valid=580, Invalid=3976, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 22:45:26,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4518 states. [2021-06-05 22:45:26,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4518 to 3435. [2021-06-05 22:45:26,163 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) [2021-06-05 22:45:26,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 13292 transitions. [2021-06-05 22:45:26,171 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 13292 transitions. Word has length 24 [2021-06-05 22:45:26,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:26,171 INFO L482 AbstractCegarLoop]: Abstraction has 3435 states and 13292 transitions. [2021-06-05 22:45:26,171 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) [2021-06-05 22:45:26,171 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 13292 transitions. [2021-06-05 22:45:26,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:45:26,176 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:26,176 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:26,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable762,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:26,378 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:45:26,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:26,378 INFO L82 PathProgramCache]: Analyzing trace with hash -755185582, now seen corresponding path program 253 times [2021-06-05 22:45:26,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:26,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519759240] [2021-06-05 22:45:26,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:26,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:26,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:26,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:26,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519759240] [2021-06-05 22:45:26,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519759240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:26,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949185662] [2021-06-05 22:45:26,543 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 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 [2021-06-05 22:45:26,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:26,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:45:26,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:26,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-05 22:45:26,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:26,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:26,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:26,681 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:45:26,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:26,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949185662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:26,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:26,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:45:26,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826485752] [2021-06-05 22:45:26,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:45:26,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:26,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:45:26,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:45:26,726 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) [2021-06-05 22:45:27,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:27,907 INFO L93 Difference]: Finished difference Result 4319 states and 16194 transitions. [2021-06-05 22:45:27,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:45:27,907 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 [2021-06-05 22:45:27,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:27,915 INFO L225 Difference]: With dead ends: 4319 [2021-06-05 22:45:27,915 INFO L226 Difference]: Without dead ends: 4310 [2021-06-05 22:45:27,915 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 955.6ms TimeCoverageRelationStatistics Valid=369, Invalid=2081, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:45:27,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4310 states. [2021-06-05 22:45:27,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4310 to 3437. [2021-06-05 22:45:27,966 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) [2021-06-05 22:45:27,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3437 states to 3437 states and 13298 transitions. [2021-06-05 22:45:27,975 INFO L78 Accepts]: Start accepts. Automaton has 3437 states and 13298 transitions. Word has length 24 [2021-06-05 22:45:27,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:27,975 INFO L482 AbstractCegarLoop]: Abstraction has 3437 states and 13298 transitions. [2021-06-05 22:45:27,975 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) [2021-06-05 22:45:27,975 INFO L276 IsEmpty]: Start isEmpty. Operand 3437 states and 13298 transitions. [2021-06-05 22:45:27,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:45:27,981 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:27,981 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:28,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable766 [2021-06-05 22:45:28,181 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:45:28,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:28,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1588924022, now seen corresponding path program 254 times [2021-06-05 22:45:28,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:28,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857740808] [2021-06-05 22:45:28,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:28,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:28,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:28,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:28,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857740808] [2021-06-05 22:45:28,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857740808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:28,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689855432] [2021-06-05 22:45:28,345 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 [2021-06-05 22:45:28,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:45:28,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:28,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:45:28,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:28,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:28,495 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 [2021-06-05 22:45:28,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:28,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:28,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:28,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:45:28,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:28,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689855432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:28,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:28,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:45:28,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149265645] [2021-06-05 22:45:28,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:45:28,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:28,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:45:28,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:45:28,594 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) [2021-06-05 22:45:29,068 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-06-05 22:45:30,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:30,635 INFO L93 Difference]: Finished difference Result 4391 states and 16320 transitions. [2021-06-05 22:45:30,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 22:45:30,636 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 [2021-06-05 22:45:30,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:30,643 INFO L225 Difference]: With dead ends: 4391 [2021-06-05 22:45:30,643 INFO L226 Difference]: Without dead ends: 4381 [2021-06-05 22:45:30,644 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 1691.4ms TimeCoverageRelationStatistics Valid=556, Invalid=2866, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 22:45:30,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4381 states. [2021-06-05 22:45:30,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4381 to 3437. [2021-06-05 22:45:30,688 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) [2021-06-05 22:45:30,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3437 states to 3437 states and 13301 transitions. [2021-06-05 22:45:30,695 INFO L78 Accepts]: Start accepts. Automaton has 3437 states and 13301 transitions. Word has length 24 [2021-06-05 22:45:30,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:30,696 INFO L482 AbstractCegarLoop]: Abstraction has 3437 states and 13301 transitions. [2021-06-05 22:45:30,696 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) [2021-06-05 22:45:30,696 INFO L276 IsEmpty]: Start isEmpty. Operand 3437 states and 13301 transitions. [2021-06-05 22:45:30,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:45:30,701 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:30,701 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:30,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable767,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:30,901 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:45:30,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:30,901 INFO L82 PathProgramCache]: Analyzing trace with hash -807090222, now seen corresponding path program 255 times [2021-06-05 22:45:30,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:30,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156413147] [2021-06-05 22:45:30,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:30,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:31,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:31,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:31,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156413147] [2021-06-05 22:45:31,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156413147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:31,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669125692] [2021-06-05 22:45:31,053 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 [2021-06-05 22:45:31,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:45:31,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:31,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:45:31,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:31,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:31,199 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 [2021-06-05 22:45:31,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:31,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:31,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:31,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:45:31,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:31,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669125692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:31,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:31,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 22:45:31,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115133570] [2021-06-05 22:45:31,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:45:31,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:31,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:45:31,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:45:31,300 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) [2021-06-05 22:45:32,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:32,751 INFO L93 Difference]: Finished difference Result 4263 states and 15959 transitions. [2021-06-05 22:45:32,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:45:32,752 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 [2021-06-05 22:45:32,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:32,759 INFO L225 Difference]: With dead ends: 4263 [2021-06-05 22:45:32,759 INFO L226 Difference]: Without dead ends: 4253 [2021-06-05 22:45:32,759 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1212.8ms TimeCoverageRelationStatistics Valid=378, Invalid=2172, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:45:32,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4253 states. [2021-06-05 22:45:32,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4253 to 3432. [2021-06-05 22:45:32,803 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) [2021-06-05 22:45:32,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3432 states to 3432 states and 13280 transitions. [2021-06-05 22:45:32,810 INFO L78 Accepts]: Start accepts. Automaton has 3432 states and 13280 transitions. Word has length 24 [2021-06-05 22:45:32,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:32,810 INFO L482 AbstractCegarLoop]: Abstraction has 3432 states and 13280 transitions. [2021-06-05 22:45:32,810 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) [2021-06-05 22:45:32,810 INFO L276 IsEmpty]: Start isEmpty. Operand 3432 states and 13280 transitions. [2021-06-05 22:45:32,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:45:32,815 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:32,815 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:33,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable770,388 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:33,015 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:45:33,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:33,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1937128230, now seen corresponding path program 28 times [2021-06-05 22:45:33,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:33,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582360920] [2021-06-05 22:45:33,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:33,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:33,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582360920] [2021-06-05 22:45:33,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582360920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:33,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099665244] [2021-06-05 22:45:33,179 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 [2021-06-05 22:45:33,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:45:33,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:33,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:45:33,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:33,350 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 [2021-06-05 22:45:33,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:33,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:33,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:33,370 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 22:45:33,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:33,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099665244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:33,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:33,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:45:33,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269222385] [2021-06-05 22:45:33,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:45:33,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:33,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:45:33,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:45:33,399 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) [2021-06-05 22:45:35,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:35,399 INFO L93 Difference]: Finished difference Result 4541 states and 16821 transitions. [2021-06-05 22:45:35,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 22:45:35,400 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 [2021-06-05 22:45:35,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:35,408 INFO L225 Difference]: With dead ends: 4541 [2021-06-05 22:45:35,408 INFO L226 Difference]: Without dead ends: 4523 [2021-06-05 22:45:35,409 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1354.1ms TimeCoverageRelationStatistics Valid=527, Invalid=3379, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 22:45:35,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4523 states. [2021-06-05 22:45:35,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4523 to 3432. [2021-06-05 22:45:35,471 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) [2021-06-05 22:45:35,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3432 states to 3432 states and 13280 transitions. [2021-06-05 22:45:35,479 INFO L78 Accepts]: Start accepts. Automaton has 3432 states and 13280 transitions. Word has length 24 [2021-06-05 22:45:35,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:35,479 INFO L482 AbstractCegarLoop]: Abstraction has 3432 states and 13280 transitions. [2021-06-05 22:45:35,479 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) [2021-06-05 22:45:35,479 INFO L276 IsEmpty]: Start isEmpty. Operand 3432 states and 13280 transitions. [2021-06-05 22:45:35,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:45:35,484 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:35,484 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:35,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 389 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable773 [2021-06-05 22:45:35,684 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:45:35,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:35,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1727590850, now seen corresponding path program 29 times [2021-06-05 22:45:35,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:35,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032943155] [2021-06-05 22:45:35,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:35,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:35,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:35,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:35,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032943155] [2021-06-05 22:45:35,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032943155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:35,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663933259] [2021-06-05 22:45:35,874 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 [2021-06-05 22:45:35,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:45:35,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:35,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:45:35,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:36,036 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 [2021-06-05 22:45:36,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:36,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:36,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:36,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 22:45:36,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:36,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663933259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:36,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:36,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:45:36,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223604351] [2021-06-05 22:45:36,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:45:36,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:36,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:45:36,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:45:36,068 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) [2021-06-05 22:45:38,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:38,333 INFO L93 Difference]: Finished difference Result 4597 states and 16922 transitions. [2021-06-05 22:45:38,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 22:45:38,334 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 [2021-06-05 22:45:38,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:38,341 INFO L225 Difference]: With dead ends: 4597 [2021-06-05 22:45:38,341 INFO L226 Difference]: Without dead ends: 4561 [2021-06-05 22:45:38,342 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 1572.9ms TimeCoverageRelationStatistics Valid=512, Invalid=3394, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 22:45:38,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2021-06-05 22:45:38,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 3436. [2021-06-05 22:45:38,389 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) [2021-06-05 22:45:38,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3436 states to 3436 states and 13294 transitions. [2021-06-05 22:45:38,396 INFO L78 Accepts]: Start accepts. Automaton has 3436 states and 13294 transitions. Word has length 24 [2021-06-05 22:45:38,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:38,397 INFO L482 AbstractCegarLoop]: Abstraction has 3436 states and 13294 transitions. [2021-06-05 22:45:38,397 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) [2021-06-05 22:45:38,397 INFO L276 IsEmpty]: Start isEmpty. Operand 3436 states and 13294 transitions. [2021-06-05 22:45:38,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:45:38,402 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:38,402 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:38,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable774 [2021-06-05 22:45:38,602 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:45:38,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:38,603 INFO L82 PathProgramCache]: Analyzing trace with hash -838704700, now seen corresponding path program 30 times [2021-06-05 22:45:38,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:38,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427069053] [2021-06-05 22:45:38,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:38,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:38,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:38,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:38,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427069053] [2021-06-05 22:45:38,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427069053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:38,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814868803] [2021-06-05 22:45:38,822 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 [2021-06-05 22:45:38,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:45:38,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:38,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 22:45:38,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:39,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:39,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:45:39,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:39,123 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 [2021-06-05 22:45:39,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:39,167 INFO L628 ElimStorePlain]: treesize reduction 35, result has 50.0 percent of original size [2021-06-05 22:45:39,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:39,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:39 [2021-06-05 22:45:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:39,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814868803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:39,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:39,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:45:39,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743693351] [2021-06-05 22:45:39,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:45:39,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:39,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:45:39,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:45:39,237 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) [2021-06-05 22:45:41,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:41,196 INFO L93 Difference]: Finished difference Result 4452 states and 16642 transitions. [2021-06-05 22:45:41,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:45:41,197 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 [2021-06-05 22:45:41,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:41,204 INFO L225 Difference]: With dead ends: 4452 [2021-06-05 22:45:41,204 INFO L226 Difference]: Without dead ends: 4433 [2021-06-05 22:45:41,205 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 1525.3ms TimeCoverageRelationStatistics Valid=466, Invalid=3194, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 22:45:41,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4433 states. [2021-06-05 22:45:41,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4433 to 3447. [2021-06-05 22:45:41,251 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) [2021-06-05 22:45:41,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 13333 transitions. [2021-06-05 22:45:41,258 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 13333 transitions. Word has length 24 [2021-06-05 22:45:41,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:41,258 INFO L482 AbstractCegarLoop]: Abstraction has 3447 states and 13333 transitions. [2021-06-05 22:45:41,259 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) [2021-06-05 22:45:41,259 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 13333 transitions. [2021-06-05 22:45:41,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:45:41,263 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:41,263 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:41,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable775,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:41,464 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:45:41,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:41,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1866854560, now seen corresponding path program 31 times [2021-06-05 22:45:41,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:41,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482320965] [2021-06-05 22:45:41,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:41,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:41,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:41,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:41,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482320965] [2021-06-05 22:45:41,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482320965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:41,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830305455] [2021-06-05 22:45:41,612 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 [2021-06-05 22:45:41,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:41,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:45:41,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:41,744 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 [2021-06-05 22:45:41,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:41,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:41,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:41,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:45:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:41,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830305455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:41,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:41,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:45:41,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77341441] [2021-06-05 22:45:41,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:45:41,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:41,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:45:41,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:45:41,793 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) [2021-06-05 22:45:42,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:42,978 INFO L93 Difference]: Finished difference Result 4341 states and 16273 transitions. [2021-06-05 22:45:42,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:45:42,979 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 [2021-06-05 22:45:42,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:42,986 INFO L225 Difference]: With dead ends: 4341 [2021-06-05 22:45:42,986 INFO L226 Difference]: Without dead ends: 4332 [2021-06-05 22:45:42,986 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 929.3ms TimeCoverageRelationStatistics Valid=369, Invalid=2081, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:45:42,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4332 states. [2021-06-05 22:45:43,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4332 to 3452. [2021-06-05 22:45:43,031 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) [2021-06-05 22:45:43,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3452 states to 3452 states and 13349 transitions. [2021-06-05 22:45:43,038 INFO L78 Accepts]: Start accepts. Automaton has 3452 states and 13349 transitions. Word has length 24 [2021-06-05 22:45:43,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:43,038 INFO L482 AbstractCegarLoop]: Abstraction has 3452 states and 13349 transitions. [2021-06-05 22:45:43,038 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) [2021-06-05 22:45:43,038 INFO L276 IsEmpty]: Start isEmpty. Operand 3452 states and 13349 transitions. [2021-06-05 22:45:43,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:45:43,042 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:43,042 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:43,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable780,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:43,243 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:45:43,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:43,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1543268382, now seen corresponding path program 32 times [2021-06-05 22:45:43,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:43,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780929245] [2021-06-05 22:45:43,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:43,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:43,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:43,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:43,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780929245] [2021-06-05 22:45:43,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780929245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:43,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769689574] [2021-06-05 22:45:43,399 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 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 [2021-06-05 22:45:43,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:45:43,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:43,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:45:43,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:43,549 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:43,549 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 [2021-06-05 22:45:43,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:43,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:43,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:43,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:45:43,647 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:43,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769689574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:43,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:43,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:45:43,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002316693] [2021-06-05 22:45:43,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:45:43,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:43,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:45:43,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:45:43,648 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) [2021-06-05 22:45:45,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:45,617 INFO L93 Difference]: Finished difference Result 4422 states and 16432 transitions. [2021-06-05 22:45:45,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 22:45:45,618 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 [2021-06-05 22:45:45,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:45,626 INFO L225 Difference]: With dead ends: 4422 [2021-06-05 22:45:45,626 INFO L226 Difference]: Without dead ends: 4411 [2021-06-05 22:45:45,626 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 1657.9ms TimeCoverageRelationStatistics Valid=556, Invalid=2866, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 22:45:45,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4411 states. [2021-06-05 22:45:45,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4411 to 3455. [2021-06-05 22:45:45,679 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) [2021-06-05 22:45:45,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3455 states to 3455 states and 13360 transitions. [2021-06-05 22:45:45,687 INFO L78 Accepts]: Start accepts. Automaton has 3455 states and 13360 transitions. Word has length 24 [2021-06-05 22:45:45,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:45,687 INFO L482 AbstractCegarLoop]: Abstraction has 3455 states and 13360 transitions. [2021-06-05 22:45:45,687 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) [2021-06-05 22:45:45,687 INFO L276 IsEmpty]: Start isEmpty. Operand 3455 states and 13360 transitions. [2021-06-05 22:45:45,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:45:45,692 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:45,692 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:45,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:45,893 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:45:45,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:45,893 INFO L82 PathProgramCache]: Analyzing trace with hash 142475740, now seen corresponding path program 33 times [2021-06-05 22:45:45,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:45,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657211289] [2021-06-05 22:45:45,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:45,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:46,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:46,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:46,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657211289] [2021-06-05 22:45:46,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657211289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:46,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936579267] [2021-06-05 22:45:46,052 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 [2021-06-05 22:45:46,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:45:46,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:46,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:45:46,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:46,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:46,201 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 21 treesize of output 29 [2021-06-05 22:45:46,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:46,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:46,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:46,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:45:46,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:46,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936579267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:46,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:46,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 22:45:46,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212570935] [2021-06-05 22:45:46,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:45:46,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:46,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:45:46,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:45:46,287 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) [2021-06-05 22:45:47,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:47,837 INFO L93 Difference]: Finished difference Result 4282 states and 16027 transitions. [2021-06-05 22:45:47,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:45:47,837 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 [2021-06-05 22:45:47,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:47,845 INFO L225 Difference]: With dead ends: 4282 [2021-06-05 22:45:47,845 INFO L226 Difference]: Without dead ends: 4271 [2021-06-05 22:45:47,845 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1204.3ms TimeCoverageRelationStatistics Valid=378, Invalid=2172, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:45:47,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4271 states. [2021-06-05 22:45:47,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4271 to 3444. [2021-06-05 22:45:47,894 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) [2021-06-05 22:45:47,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3444 states to 3444 states and 13321 transitions. [2021-06-05 22:45:47,903 INFO L78 Accepts]: Start accepts. Automaton has 3444 states and 13321 transitions. Word has length 24 [2021-06-05 22:45:47,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:47,903 INFO L482 AbstractCegarLoop]: Abstraction has 3444 states and 13321 transitions. [2021-06-05 22:45:47,903 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) [2021-06-05 22:45:47,903 INFO L276 IsEmpty]: Start isEmpty. Operand 3444 states and 13321 transitions. [2021-06-05 22:45:47,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:45:47,908 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:47,908 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:48,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable784 [2021-06-05 22:45:48,109 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:45:48,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:48,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1345253192, now seen corresponding path program 256 times [2021-06-05 22:45:48,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:48,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867876582] [2021-06-05 22:45:48,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:48,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:48,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:48,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:48,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867876582] [2021-06-05 22:45:48,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867876582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:48,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842703050] [2021-06-05 22:45:48,283 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 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 [2021-06-05 22:45:48,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:45:48,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:48,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:45:48,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:48,436 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 [2021-06-05 22:45:48,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:48,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:48,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:48,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-05 22:45:48,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:48,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842703050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:48,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:48,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-05 22:45:48,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668808571] [2021-06-05 22:45:48,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:45:48,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:48,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:45:48,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:45:48,458 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) [2021-06-05 22:45:49,438 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-06-05 22:45:49,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:49,557 INFO L93 Difference]: Finished difference Result 3732 states and 14071 transitions. [2021-06-05 22:45:49,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:45:49,557 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 [2021-06-05 22:45:49,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:49,564 INFO L225 Difference]: With dead ends: 3732 [2021-06-05 22:45:49,564 INFO L226 Difference]: Without dead ends: 3648 [2021-06-05 22:45:49,564 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 774.0ms TimeCoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:45:49,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3648 states. [2021-06-05 22:45:49,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3648 to 3449. [2021-06-05 22:45:49,612 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) [2021-06-05 22:45:49,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3449 states to 3449 states and 13334 transitions. [2021-06-05 22:45:49,620 INFO L78 Accepts]: Start accepts. Automaton has 3449 states and 13334 transitions. Word has length 24 [2021-06-05 22:45:49,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:49,620 INFO L482 AbstractCegarLoop]: Abstraction has 3449 states and 13334 transitions. [2021-06-05 22:45:49,620 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) [2021-06-05 22:45:49,620 INFO L276 IsEmpty]: Start isEmpty. Operand 3449 states and 13334 transitions. [2021-06-05 22:45:49,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:45:49,626 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:49,626 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:49,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable786,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:49,826 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:45:49,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:49,826 INFO L82 PathProgramCache]: Analyzing trace with hash -80955710, now seen corresponding path program 257 times [2021-06-05 22:45:49,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:49,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184508199] [2021-06-05 22:45:49,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:49,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:49,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:49,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:49,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184508199] [2021-06-05 22:45:49,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184508199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:49,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128747539] [2021-06-05 22:45:49,983 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 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 [2021-06-05 22:45:50,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:45:50,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:50,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:45:50,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:50,139 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 [2021-06-05 22:45:50,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:50,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:50,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:50,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-05 22:45:50,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:50,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128747539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:50,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:50,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-05 22:45:50,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033560894] [2021-06-05 22:45:50,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:45:50,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:50,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:45:50,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:45:50,160 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) [2021-06-05 22:45:51,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:51,114 INFO L93 Difference]: Finished difference Result 3731 states and 14034 transitions. [2021-06-05 22:45:51,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:45:51,114 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 [2021-06-05 22:45:51,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:51,120 INFO L225 Difference]: With dead ends: 3731 [2021-06-05 22:45:51,120 INFO L226 Difference]: Without dead ends: 3654 [2021-06-05 22:45:51,120 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 649.6ms TimeCoverageRelationStatistics Valid=141, Invalid=1119, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:45:51,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3654 states. [2021-06-05 22:45:51,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3654 to 3452. [2021-06-05 22:45:51,156 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) [2021-06-05 22:45:51,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3452 states to 3452 states and 13341 transitions. [2021-06-05 22:45:51,163 INFO L78 Accepts]: Start accepts. Automaton has 3452 states and 13341 transitions. Word has length 24 [2021-06-05 22:45:51,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:51,163 INFO L482 AbstractCegarLoop]: Abstraction has 3452 states and 13341 transitions. [2021-06-05 22:45:51,163 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) [2021-06-05 22:45:51,163 INFO L276 IsEmpty]: Start isEmpty. Operand 3452 states and 13341 transitions. [2021-06-05 22:45:51,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:45:51,167 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:51,167 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:51,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable787,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:51,367 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:45:51,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:51,368 INFO L82 PathProgramCache]: Analyzing trace with hash -257497142, now seen corresponding path program 258 times [2021-06-05 22:45:51,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:51,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357984777] [2021-06-05 22:45:51,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:51,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:51,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:51,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:51,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357984777] [2021-06-05 22:45:51,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357984777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:51,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308922090] [2021-06-05 22:45:51,514 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 [2021-06-05 22:45:51,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:45:51,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:51,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:45:51,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:51,645 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:51,645 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 [2021-06-05 22:45:51,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:51,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:51,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:51,657 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:29 [2021-06-05 22:45:51,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:51,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308922090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:51,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:51,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 22:45:51,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5849377] [2021-06-05 22:45:51,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:45:51,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:51,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:45:51,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:45:51,767 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) [2021-06-05 22:45:52,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:52,844 INFO L93 Difference]: Finished difference Result 3630 states and 13842 transitions. [2021-06-05 22:45:52,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:45:52,844 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 [2021-06-05 22:45:52,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:52,850 INFO L225 Difference]: With dead ends: 3630 [2021-06-05 22:45:52,850 INFO L226 Difference]: Without dead ends: 3585 [2021-06-05 22:45:52,851 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 786.1ms TimeCoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:45:52,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3585 states. [2021-06-05 22:45:52,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3585 to 3452. [2021-06-05 22:45:52,889 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) [2021-06-05 22:45:52,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3452 states to 3452 states and 13341 transitions. [2021-06-05 22:45:52,918 INFO L78 Accepts]: Start accepts. Automaton has 3452 states and 13341 transitions. Word has length 24 [2021-06-05 22:45:52,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:52,918 INFO L482 AbstractCegarLoop]: Abstraction has 3452 states and 13341 transitions. [2021-06-05 22:45:52,918 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) [2021-06-05 22:45:52,918 INFO L276 IsEmpty]: Start isEmpty. Operand 3452 states and 13341 transitions. [2021-06-05 22:45:52,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:45:52,923 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:52,923 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:53,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable788 [2021-06-05 22:45:53,123 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:45:53,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:53,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1091235582, now seen corresponding path program 259 times [2021-06-05 22:45:53,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:53,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203574786] [2021-06-05 22:45:53,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:53,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:53,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:53,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:53,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203574786] [2021-06-05 22:45:53,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203574786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:53,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288484520] [2021-06-05 22:45:53,297 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 [2021-06-05 22:45:53,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:53,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:45:53,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:53,417 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 [2021-06-05 22:45:53,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:53,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:53,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:53,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:10 [2021-06-05 22:45:53,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:53,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288484520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:53,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:53,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-05 22:45:53,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100283798] [2021-06-05 22:45:53,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:45:53,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:53,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:45:53,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:45:53,445 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) [2021-06-05 22:45:54,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:54,053 INFO L93 Difference]: Finished difference Result 3580 states and 13695 transitions. [2021-06-05 22:45:54,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:45:54,054 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 [2021-06-05 22:45:54,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:54,060 INFO L225 Difference]: With dead ends: 3580 [2021-06-05 22:45:54,061 INFO L226 Difference]: Without dead ends: 3541 [2021-06-05 22:45:54,061 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 456.2ms TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:45:54,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3541 states. [2021-06-05 22:45:54,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3541 to 3450. [2021-06-05 22:45:54,110 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) [2021-06-05 22:45:54,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3450 states to 3450 states and 13337 transitions. [2021-06-05 22:45:54,118 INFO L78 Accepts]: Start accepts. Automaton has 3450 states and 13337 transitions. Word has length 24 [2021-06-05 22:45:54,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:54,119 INFO L482 AbstractCegarLoop]: Abstraction has 3450 states and 13337 transitions. [2021-06-05 22:45:54,119 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) [2021-06-05 22:45:54,119 INFO L276 IsEmpty]: Start isEmpty. Operand 3450 states and 13337 transitions. [2021-06-05 22:45:54,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:45:54,124 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:54,124 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:54,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable792,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:54,325 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:45:54,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:54,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1382111726, now seen corresponding path program 34 times [2021-06-05 22:45:54,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:54,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590409281] [2021-06-05 22:45:54,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:54,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:54,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:54,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:54,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590409281] [2021-06-05 22:45:54,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590409281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:54,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478265989] [2021-06-05 22:45:54,491 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 [2021-06-05 22:45:54,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:45:54,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:54,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:45:54,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:54,643 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 [2021-06-05 22:45:54,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:54,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:54,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:54,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-05 22:45:54,663 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:54,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478265989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:54,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:54,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-05 22:45:54,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739385789] [2021-06-05 22:45:54,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:45:54,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:54,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:45:54,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:45:54,664 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) [2021-06-05 22:45:56,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:56,017 INFO L93 Difference]: Finished difference Result 3746 states and 14106 transitions. [2021-06-05 22:45:56,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:45:56,017 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 [2021-06-05 22:45:56,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:56,023 INFO L225 Difference]: With dead ends: 3746 [2021-06-05 22:45:56,024 INFO L226 Difference]: Without dead ends: 3666 [2021-06-05 22:45:56,024 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1057.2ms TimeCoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:45:56,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3666 states. [2021-06-05 22:45:56,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3666 to 3454. [2021-06-05 22:45:56,066 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) [2021-06-05 22:45:56,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3454 states to 3454 states and 13350 transitions. [2021-06-05 22:45:56,073 INFO L78 Accepts]: Start accepts. Automaton has 3454 states and 13350 transitions. Word has length 24 [2021-06-05 22:45:56,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:56,073 INFO L482 AbstractCegarLoop]: Abstraction has 3454 states and 13350 transitions. [2021-06-05 22:45:56,073 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) [2021-06-05 22:45:56,073 INFO L276 IsEmpty]: Start isEmpty. Operand 3454 states and 13350 transitions. [2021-06-05 22:45:56,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:45:56,078 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:56,078 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:56,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable793 [2021-06-05 22:45:56,278 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:45:56,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:56,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1184183824, now seen corresponding path program 35 times [2021-06-05 22:45:56,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:56,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931417970] [2021-06-05 22:45:56,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:56,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:56,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:56,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931417970] [2021-06-05 22:45:56,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931417970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:56,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884831037] [2021-06-05 22:45:56,467 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 [2021-06-05 22:45:56,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:45:56,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:56,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:45:56,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:56,622 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 [2021-06-05 22:45:56,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:56,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:56,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:56,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-05 22:45:56,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:56,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884831037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:56,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:56,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-06-05 22:45:56,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033479061] [2021-06-05 22:45:56,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:45:56,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:56,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:45:56,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:45:56,644 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) [2021-06-05 22:45:58,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:58,029 INFO L93 Difference]: Finished difference Result 3757 states and 14125 transitions. [2021-06-05 22:45:58,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:45:58,029 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 [2021-06-05 22:45:58,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:58,036 INFO L225 Difference]: With dead ends: 3757 [2021-06-05 22:45:58,036 INFO L226 Difference]: Without dead ends: 3676 [2021-06-05 22:45:58,036 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1126.1ms TimeCoverageRelationStatistics Valid=198, Invalid=1284, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:45:58,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3676 states. [2021-06-05 22:45:58,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3676 to 3459. [2021-06-05 22:45:58,078 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) [2021-06-05 22:45:58,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3459 states to 3459 states and 13364 transitions. [2021-06-05 22:45:58,085 INFO L78 Accepts]: Start accepts. Automaton has 3459 states and 13364 transitions. Word has length 24 [2021-06-05 22:45:58,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:58,085 INFO L482 AbstractCegarLoop]: Abstraction has 3459 states and 13364 transitions. [2021-06-05 22:45:58,085 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) [2021-06-05 22:45:58,085 INFO L276 IsEmpty]: Start isEmpty. Operand 3459 states and 13364 transitions. [2021-06-05 22:45:58,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:45:58,090 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:58,090 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:58,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable794 [2021-06-05 22:45:58,291 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:45:58,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:58,291 INFO L82 PathProgramCache]: Analyzing trace with hash 2082633612, now seen corresponding path program 36 times [2021-06-05 22:45:58,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:58,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281823528] [2021-06-05 22:45:58,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:58,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:58,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:58,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281823528] [2021-06-05 22:45:58,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281823528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:58,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318063723] [2021-06-05 22:45:58,449 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 [2021-06-05 22:45:58,475 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:45:58,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:58,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:45:58,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:58,569 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 [2021-06-05 22:45:58,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:45:58,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:45:58,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:45:58,574 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:10 [2021-06-05 22:45:58,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:58,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318063723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:58,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:58,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-05 22:45:58,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972229981] [2021-06-05 22:45:58,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:45:58,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:58,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:45:58,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:45:58,597 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) [2021-06-05 22:45:59,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:59,679 INFO L93 Difference]: Finished difference Result 3665 states and 13899 transitions. [2021-06-05 22:45:59,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:45:59,679 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 [2021-06-05 22:45:59,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:59,685 INFO L225 Difference]: With dead ends: 3665 [2021-06-05 22:45:59,686 INFO L226 Difference]: Without dead ends: 3625 [2021-06-05 22:45:59,686 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 828.4ms TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:45:59,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3625 states. [2021-06-05 22:45:59,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3625 to 3462. [2021-06-05 22:45:59,733 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) [2021-06-05 22:45:59,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3462 states to 3462 states and 13372 transitions. [2021-06-05 22:45:59,741 INFO L78 Accepts]: Start accepts. Automaton has 3462 states and 13372 transitions. Word has length 24 [2021-06-05 22:45:59,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:59,741 INFO L482 AbstractCegarLoop]: Abstraction has 3462 states and 13372 transitions. [2021-06-05 22:45:59,741 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) [2021-06-05 22:45:59,741 INFO L276 IsEmpty]: Start isEmpty. Operand 3462 states and 13372 transitions. [2021-06-05 22:45:59,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:45:59,746 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:59,746 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:59,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable795,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:59,947 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:45:59,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:59,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1888747506, now seen corresponding path program 37 times [2021-06-05 22:45:59,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:59,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718272067] [2021-06-05 22:45:59,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:59,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:00,103 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:00,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:00,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718272067] [2021-06-05 22:46:00,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718272067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:00,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90394321] [2021-06-05 22:46:00,103 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 [2021-06-05 22:46:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:00,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:46:00,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:00,222 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 [2021-06-05 22:46:00,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:46:00,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:00,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:46:00,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:10 [2021-06-05 22:46:00,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:00,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90394321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:00,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:00,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-05 22:46:00,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495736994] [2021-06-05 22:46:00,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:46:00,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:00,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:46:00,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:46:00,250 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) [2021-06-05 22:46:01,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:01,324 INFO L93 Difference]: Finished difference Result 3654 states and 13867 transitions. [2021-06-05 22:46:01,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:46:01,325 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 [2021-06-05 22:46:01,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:01,331 INFO L225 Difference]: With dead ends: 3654 [2021-06-05 22:46:01,331 INFO L226 Difference]: Without dead ends: 3612 [2021-06-05 22:46:01,331 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 853.1ms TimeCoverageRelationStatistics Valid=157, Invalid=1103, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:46:01,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3612 states. [2021-06-05 22:46:01,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3612 to 3453. [2021-06-05 22:46:01,373 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) [2021-06-05 22:46:01,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3453 states to 3453 states and 13349 transitions. [2021-06-05 22:46:01,380 INFO L78 Accepts]: Start accepts. Automaton has 3453 states and 13349 transitions. Word has length 24 [2021-06-05 22:46:01,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:01,380 INFO L482 AbstractCegarLoop]: Abstraction has 3453 states and 13349 transitions. [2021-06-05 22:46:01,380 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) [2021-06-05 22:46:01,380 INFO L276 IsEmpty]: Start isEmpty. Operand 3453 states and 13349 transitions. [2021-06-05 22:46:01,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:46:01,404 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:01,404 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:01,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable796 [2021-06-05 22:46:01,605 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:46:01,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:01,605 INFO L82 PathProgramCache]: Analyzing trace with hash -597575396, now seen corresponding path program 260 times [2021-06-05 22:46:01,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:01,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118821208] [2021-06-05 22:46:01,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:01,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:01,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:01,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:01,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118821208] [2021-06-05 22:46:01,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118821208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:01,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122704986] [2021-06-05 22:46:01,765 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 [2021-06-05 22:46:01,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:46:01,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:01,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:46:01,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:01,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:01,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:01,950 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 [2021-06-05 22:46:01,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:46:01,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:01,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:46:01,957 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-05 22:46:01,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:01,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122704986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:01,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:01,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 20 [2021-06-05 22:46:01,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070552800] [2021-06-05 22:46:01,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:46:01,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:01,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:46:01,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:46:01,974 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) [2021-06-05 22:46:03,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:03,525 INFO L93 Difference]: Finished difference Result 3992 states and 14802 transitions. [2021-06-05 22:46:03,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 22:46:03,525 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 [2021-06-05 22:46:03,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:03,532 INFO L225 Difference]: With dead ends: 3992 [2021-06-05 22:46:03,532 INFO L226 Difference]: Without dead ends: 3917 [2021-06-05 22:46:03,532 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 1146.9ms TimeCoverageRelationStatistics Valid=353, Invalid=2617, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 22:46:03,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3917 states. [2021-06-05 22:46:03,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3917 to 3547. [2021-06-05 22:46:03,588 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) [2021-06-05 22:46:03,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3547 states to 3547 states and 13725 transitions. [2021-06-05 22:46:03,595 INFO L78 Accepts]: Start accepts. Automaton has 3547 states and 13725 transitions. Word has length 24 [2021-06-05 22:46:03,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:03,595 INFO L482 AbstractCegarLoop]: Abstraction has 3547 states and 13725 transitions. [2021-06-05 22:46:03,596 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) [2021-06-05 22:46:03,596 INFO L276 IsEmpty]: Start isEmpty. Operand 3547 states and 13725 transitions. [2021-06-05 22:46:03,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:46:03,600 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:03,600 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:03,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable797,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:03,801 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:46:03,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:03,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1421943676, now seen corresponding path program 261 times [2021-06-05 22:46:03,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:03,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301799802] [2021-06-05 22:46:03,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:03,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:03,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:03,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:03,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301799802] [2021-06-05 22:46:03,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301799802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:03,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717616679] [2021-06-05 22:46:03,946 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 [2021-06-05 22:46:03,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:46:03,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:03,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:46:03,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:04,086 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:04,087 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 [2021-06-05 22:46:04,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:46:04,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:04,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:46:04,100 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2021-06-05 22:46:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:04,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717616679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:04,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:04,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 22:46:04,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587108206] [2021-06-05 22:46:04,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:46:04,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:04,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:46:04,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:46:04,182 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) [2021-06-05 22:46:05,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:05,713 INFO L93 Difference]: Finished difference Result 3934 states and 14730 transitions. [2021-06-05 22:46:05,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:46:05,713 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 [2021-06-05 22:46:05,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:05,721 INFO L225 Difference]: With dead ends: 3934 [2021-06-05 22:46:05,721 INFO L226 Difference]: Without dead ends: 3879 [2021-06-05 22:46:05,721 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1086.2ms TimeCoverageRelationStatistics Valid=293, Invalid=2157, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:46:05,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3879 states. [2021-06-05 22:46:05,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3879 to 3552. [2021-06-05 22:46:05,791 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) [2021-06-05 22:46:05,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3552 states to 3552 states and 13722 transitions. [2021-06-05 22:46:05,800 INFO L78 Accepts]: Start accepts. Automaton has 3552 states and 13722 transitions. Word has length 24 [2021-06-05 22:46:05,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:05,800 INFO L482 AbstractCegarLoop]: Abstraction has 3552 states and 13722 transitions. [2021-06-05 22:46:05,800 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) [2021-06-05 22:46:05,800 INFO L276 IsEmpty]: Start isEmpty. Operand 3552 states and 13722 transitions. [2021-06-05 22:46:05,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:46:05,805 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:05,805 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:06,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable798,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:06,006 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:46:06,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:06,006 INFO L82 PathProgramCache]: Analyzing trace with hash -380150510, now seen corresponding path program 262 times [2021-06-05 22:46:06,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:06,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082078461] [2021-06-05 22:46:06,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:06,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:06,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:06,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:06,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082078461] [2021-06-05 22:46:06,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082078461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:06,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511644798] [2021-06-05 22:46:06,156 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 [2021-06-05 22:46:06,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:46:06,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:06,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:46:06,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:06,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-06-05 22:46:06,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:46:06,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:06,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:46:06,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:10 [2021-06-05 22:46:06,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:06,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511644798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:06,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:06,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-05 22:46:06,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386571298] [2021-06-05 22:46:06,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:46:06,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:06,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:46:06,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:46:06,309 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) [2021-06-05 22:46:07,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:07,329 INFO L93 Difference]: Finished difference Result 3730 states and 14250 transitions. [2021-06-05 22:46:07,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:46:07,329 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 [2021-06-05 22:46:07,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:07,336 INFO L225 Difference]: With dead ends: 3730 [2021-06-05 22:46:07,336 INFO L226 Difference]: Without dead ends: 3704 [2021-06-05 22:46:07,336 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 790.3ms TimeCoverageRelationStatistics Valid=189, Invalid=1217, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:46:07,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3704 states. [2021-06-05 22:46:07,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3704 to 3564. [2021-06-05 22:46:07,384 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) [2021-06-05 22:46:07,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3564 states to 3564 states and 13766 transitions. [2021-06-05 22:46:07,392 INFO L78 Accepts]: Start accepts. Automaton has 3564 states and 13766 transitions. Word has length 24 [2021-06-05 22:46:07,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:07,392 INFO L482 AbstractCegarLoop]: Abstraction has 3564 states and 13766 transitions. [2021-06-05 22:46:07,392 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) [2021-06-05 22:46:07,392 INFO L276 IsEmpty]: Start isEmpty. Operand 3564 states and 13766 transitions. [2021-06-05 22:46:07,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:46:07,398 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:07,398 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:07,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable802 [2021-06-05 22:46:07,598 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:46:07,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:07,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1213888950, now seen corresponding path program 263 times [2021-06-05 22:46:07,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:07,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868863021] [2021-06-05 22:46:07,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:07,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:07,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:07,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868863021] [2021-06-05 22:46:07,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868863021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:07,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698778344] [2021-06-05 22:46:07,755 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 [2021-06-05 22:46:07,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:46:07,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:07,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:46:07,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:07,896 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 [2021-06-05 22:46:07,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:46:07,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:07,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:46:07,901 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:10 [2021-06-05 22:46:07,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:07,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698778344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:07,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:07,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-05 22:46:07,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397529073] [2021-06-05 22:46:07,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:46:07,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:07,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:46:07,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:46:07,925 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) [2021-06-05 22:46:09,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:09,105 INFO L93 Difference]: Finished difference Result 3752 states and 14293 transitions. [2021-06-05 22:46:09,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:46:09,106 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 [2021-06-05 22:46:09,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:09,112 INFO L225 Difference]: With dead ends: 3752 [2021-06-05 22:46:09,112 INFO L226 Difference]: Without dead ends: 3729 [2021-06-05 22:46:09,113 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 840.5ms TimeCoverageRelationStatistics Valid=208, Invalid=1432, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:46:09,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3729 states. [2021-06-05 22:46:09,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3729 to 3571. [2021-06-05 22:46:09,158 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) [2021-06-05 22:46:09,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 13786 transitions. [2021-06-05 22:46:09,165 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 13786 transitions. Word has length 24 [2021-06-05 22:46:09,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:09,166 INFO L482 AbstractCegarLoop]: Abstraction has 3571 states and 13786 transitions. [2021-06-05 22:46:09,166 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) [2021-06-05 22:46:09,166 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 13786 transitions. [2021-06-05 22:46:09,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:46:09,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:09,171 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:09,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable803,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:09,371 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:46:09,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:09,371 INFO L82 PathProgramCache]: Analyzing trace with hash 44593446, now seen corresponding path program 38 times [2021-06-05 22:46:09,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:09,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466832641] [2021-06-05 22:46:09,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:09,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:09,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:09,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:09,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466832641] [2021-06-05 22:46:09,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466832641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:09,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887607232] [2021-06-05 22:46:09,541 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 [2021-06-05 22:46:09,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:46:09,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:09,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:46:09,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:09,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:09,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:09,741 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 [2021-06-05 22:46:09,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:46:09,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:09,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:46:09,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-05 22:46:09,763 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:09,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887607232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:09,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:09,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 20 [2021-06-05 22:46:09,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912190649] [2021-06-05 22:46:09,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:46:09,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:09,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:46:09,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:46:09,764 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) [2021-06-05 22:46:11,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:11,509 INFO L93 Difference]: Finished difference Result 3868 states and 14553 transitions. [2021-06-05 22:46:11,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 22:46:11,509 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 [2021-06-05 22:46:11,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:11,516 INFO L225 Difference]: With dead ends: 3868 [2021-06-05 22:46:11,516 INFO L226 Difference]: Without dead ends: 3816 [2021-06-05 22:46:11,517 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1342.3ms TimeCoverageRelationStatistics Valid=328, Invalid=2222, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:46:11,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3816 states. [2021-06-05 22:46:11,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3816 to 3583. [2021-06-05 22:46:11,566 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) [2021-06-05 22:46:11,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3583 states to 3583 states and 13832 transitions. [2021-06-05 22:46:11,575 INFO L78 Accepts]: Start accepts. Automaton has 3583 states and 13832 transitions. Word has length 24 [2021-06-05 22:46:11,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:11,575 INFO L482 AbstractCegarLoop]: Abstraction has 3583 states and 13832 transitions. [2021-06-05 22:46:11,575 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) [2021-06-05 22:46:11,575 INFO L276 IsEmpty]: Start isEmpty. Operand 3583 states and 13832 transitions. [2021-06-05 22:46:11,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:46:11,580 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:11,580 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:11,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable804 [2021-06-05 22:46:11,781 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:46:11,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:11,781 INFO L82 PathProgramCache]: Analyzing trace with hash -983556414, now seen corresponding path program 39 times [2021-06-05 22:46:11,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:11,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907738385] [2021-06-05 22:46:11,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:11,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:11,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:11,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:11,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907738385] [2021-06-05 22:46:11,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907738385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:11,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687589824] [2021-06-05 22:46:11,953 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 [2021-06-05 22:46:11,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:46:11,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:11,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:46:11,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:12,093 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:12,093 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 [2021-06-05 22:46:12,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:46:12,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:12,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:46:12,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:29 [2021-06-05 22:46:12,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:12,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687589824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:12,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:12,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 22:46:12,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644524492] [2021-06-05 22:46:12,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:46:12,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:12,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:46:12,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:46:12,220 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) [2021-06-05 22:46:13,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:13,751 INFO L93 Difference]: Finished difference Result 3811 states and 14413 transitions. [2021-06-05 22:46:13,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:46:13,752 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 [2021-06-05 22:46:13,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:13,758 INFO L225 Difference]: With dead ends: 3811 [2021-06-05 22:46:13,758 INFO L226 Difference]: Without dead ends: 3757 [2021-06-05 22:46:13,759 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1221.9ms TimeCoverageRelationStatistics Valid=279, Invalid=2073, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 22:46:13,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3757 states. [2021-06-05 22:46:13,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3757 to 3592. [2021-06-05 22:46:13,806 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) [2021-06-05 22:46:13,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3592 states to 3592 states and 13860 transitions. [2021-06-05 22:46:13,815 INFO L78 Accepts]: Start accepts. Automaton has 3592 states and 13860 transitions. Word has length 24 [2021-06-05 22:46:13,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:13,815 INFO L482 AbstractCegarLoop]: Abstraction has 3592 states and 13860 transitions. [2021-06-05 22:46:13,815 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) [2021-06-05 22:46:13,815 INFO L276 IsEmpty]: Start isEmpty. Operand 3592 states and 13860 transitions. [2021-06-05 22:46:13,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:46:13,820 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:13,820 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:14,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable805,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:14,021 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:46:14,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:14,021 INFO L82 PathProgramCache]: Analyzing trace with hash -659970236, now seen corresponding path program 40 times [2021-06-05 22:46:14,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:14,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059718402] [2021-06-05 22:46:14,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:14,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:14,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:14,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059718402] [2021-06-05 22:46:14,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059718402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:14,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481730900] [2021-06-05 22:46:14,174 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 [2021-06-05 22:46:14,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:46:14,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:14,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:46:14,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:14,307 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 [2021-06-05 22:46:14,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:46:14,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:14,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:46:14,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:10 [2021-06-05 22:46:14,333 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:14,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481730900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:14,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:14,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-05 22:46:14,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454306123] [2021-06-05 22:46:14,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:46:14,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:14,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:46:14,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:46:14,334 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) [2021-06-05 22:46:15,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:15,845 INFO L93 Difference]: Finished difference Result 3849 states and 14541 transitions. [2021-06-05 22:46:15,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 22:46:15,845 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 [2021-06-05 22:46:15,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:15,852 INFO L225 Difference]: With dead ends: 3849 [2021-06-05 22:46:15,852 INFO L226 Difference]: Without dead ends: 3822 [2021-06-05 22:46:15,853 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1173.0ms TimeCoverageRelationStatistics Valid=303, Invalid=2247, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:46:15,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2021-06-05 22:46:15,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 3599. [2021-06-05 22:46:15,899 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) [2021-06-05 22:46:15,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3599 states to 3599 states and 13888 transitions. [2021-06-05 22:46:15,907 INFO L78 Accepts]: Start accepts. Automaton has 3599 states and 13888 transitions. Word has length 24 [2021-06-05 22:46:15,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:15,907 INFO L482 AbstractCegarLoop]: Abstraction has 3599 states and 13888 transitions. [2021-06-05 22:46:15,907 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) [2021-06-05 22:46:15,907 INFO L276 IsEmpty]: Start isEmpty. Operand 3599 states and 13888 transitions. [2021-06-05 22:46:15,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:46:15,912 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:15,912 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:16,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable810 [2021-06-05 22:46:16,113 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:46:16,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:16,113 INFO L82 PathProgramCache]: Analyzing trace with hash -974941220, now seen corresponding path program 41 times [2021-06-05 22:46:16,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:16,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568132595] [2021-06-05 22:46:16,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:16,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:16,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:16,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:16,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568132595] [2021-06-05 22:46:16,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568132595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:16,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379842512] [2021-06-05 22:46:16,260 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 [2021-06-05 22:46:16,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:46:16,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:16,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:46:16,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:16,410 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 [2021-06-05 22:46:16,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:46:16,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:16,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:46:16,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-05 22:46:16,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:16,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379842512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:16,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:16,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-06-05 22:46:16,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509645292] [2021-06-05 22:46:16,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:46:16,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:16,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:46:16,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:46:16,436 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) [2021-06-05 22:46:17,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:17,627 INFO L93 Difference]: Finished difference Result 3985 states and 15021 transitions. [2021-06-05 22:46:17,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:46:17,627 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 [2021-06-05 22:46:17,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:17,634 INFO L225 Difference]: With dead ends: 3985 [2021-06-05 22:46:17,634 INFO L226 Difference]: Without dead ends: 3959 [2021-06-05 22:46:17,634 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 920.4ms TimeCoverageRelationStatistics Valid=344, Invalid=1726, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:46:17,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3959 states. [2021-06-05 22:46:17,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3959 to 3669. [2021-06-05 22:46:17,680 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) [2021-06-05 22:46:17,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3669 states to 3669 states and 14168 transitions. [2021-06-05 22:46:17,688 INFO L78 Accepts]: Start accepts. Automaton has 3669 states and 14168 transitions. Word has length 24 [2021-06-05 22:46:17,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:17,688 INFO L482 AbstractCegarLoop]: Abstraction has 3669 states and 14168 transitions. [2021-06-05 22:46:17,688 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) [2021-06-05 22:46:17,688 INFO L276 IsEmpty]: Start isEmpty. Operand 3669 states and 14168 transitions. [2021-06-05 22:46:17,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:46:17,693 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:17,693 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:17,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable811 [2021-06-05 22:46:17,893 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:46:17,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:17,894 INFO L82 PathProgramCache]: Analyzing trace with hash -234349534, now seen corresponding path program 42 times [2021-06-05 22:46:17,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:17,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926109191] [2021-06-05 22:46:17,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:18,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:18,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:18,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926109191] [2021-06-05 22:46:18,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926109191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:18,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158421157] [2021-06-05 22:46:18,046 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 [2021-06-05 22:46:18,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:46:18,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:18,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:46:18,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:18,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:18,167 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 [2021-06-05 22:46:18,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:46:18,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:18,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:46:18,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:29 [2021-06-05 22:46:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:18,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158421157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:18,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:18,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 22:46:18,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609234796] [2021-06-05 22:46:18,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:46:18,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:18,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:46:18,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:46:18,286 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) [2021-06-05 22:46:19,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:19,647 INFO L93 Difference]: Finished difference Result 3868 states and 14708 transitions. [2021-06-05 22:46:19,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:46:19,647 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 [2021-06-05 22:46:19,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:19,653 INFO L225 Difference]: With dead ends: 3868 [2021-06-05 22:46:19,654 INFO L226 Difference]: Without dead ends: 3827 [2021-06-05 22:46:19,654 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1116.1ms TimeCoverageRelationStatistics Valid=273, Invalid=1797, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:46:19,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3827 states. [2021-06-05 22:46:19,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3827 to 3676. [2021-06-05 22:46:19,697 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) [2021-06-05 22:46:19,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3676 states to 3676 states and 14185 transitions. [2021-06-05 22:46:19,704 INFO L78 Accepts]: Start accepts. Automaton has 3676 states and 14185 transitions. Word has length 24 [2021-06-05 22:46:19,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:19,705 INFO L482 AbstractCegarLoop]: Abstraction has 3676 states and 14185 transitions. [2021-06-05 22:46:19,705 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) [2021-06-05 22:46:19,705 INFO L276 IsEmpty]: Start isEmpty. Operand 3676 states and 14185 transitions. [2021-06-05 22:46:19,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:46:19,710 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:19,710 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:19,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable812,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:19,910 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:46:19,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:19,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1484751672, now seen corresponding path program 264 times [2021-06-05 22:46:19,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:19,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362865526] [2021-06-05 22:46:19,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:19,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:20,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:20,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:20,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362865526] [2021-06-05 22:46:20,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362865526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:20,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025166508] [2021-06-05 22:46:20,069 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 [2021-06-05 22:46:20,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:46:20,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:20,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:46:20,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:20,188 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:20,189 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 [2021-06-05 22:46:20,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:46:20,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:20,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:46:20,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:29 [2021-06-05 22:46:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:20,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025166508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:20,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:20,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 22:46:20,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747154887] [2021-06-05 22:46:20,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:46:20,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:20,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:46:20,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:46:20,315 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) [2021-06-05 22:46:21,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:21,826 INFO L93 Difference]: Finished difference Result 3954 states and 14929 transitions. [2021-06-05 22:46:21,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:46:21,827 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 [2021-06-05 22:46:21,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:21,833 INFO L225 Difference]: With dead ends: 3954 [2021-06-05 22:46:21,833 INFO L226 Difference]: Without dead ends: 3908 [2021-06-05 22:46:21,833 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1154.8ms TimeCoverageRelationStatistics Valid=282, Invalid=2070, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 22:46:21,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3908 states. [2021-06-05 22:46:21,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3908 to 3697. [2021-06-05 22:46:21,876 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) [2021-06-05 22:46:21,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3697 states to 3697 states and 14252 transitions. [2021-06-05 22:46:21,884 INFO L78 Accepts]: Start accepts. Automaton has 3697 states and 14252 transitions. Word has length 24 [2021-06-05 22:46:21,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:21,884 INFO L482 AbstractCegarLoop]: Abstraction has 3697 states and 14252 transitions. [2021-06-05 22:46:21,884 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) [2021-06-05 22:46:21,884 INFO L276 IsEmpty]: Start isEmpty. Operand 3697 states and 14252 transitions. [2021-06-05 22:46:21,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:46:21,889 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:21,889 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:22,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable816,412 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:22,089 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:46:22,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:22,090 INFO L82 PathProgramCache]: Analyzing trace with hash -306109502, now seen corresponding path program 265 times [2021-06-05 22:46:22,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:22,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022228081] [2021-06-05 22:46:22,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:22,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:22,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:22,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:22,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022228081] [2021-06-05 22:46:22,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022228081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:22,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998929790] [2021-06-05 22:46:22,256 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 [2021-06-05 22:46:22,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:22,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:46:22,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:22,363 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 [2021-06-05 22:46:22,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:46:22,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:22,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:46:22,369 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:10 [2021-06-05 22:46:22,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:22,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998929790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:22,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:22,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-05 22:46:22,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092872948] [2021-06-05 22:46:22,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:46:22,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:22,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:46:22,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:46:22,392 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) [2021-06-05 22:46:23,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:23,100 INFO L93 Difference]: Finished difference Result 3861 states and 14710 transitions. [2021-06-05 22:46:23,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:46:23,101 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 [2021-06-05 22:46:23,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:23,108 INFO L225 Difference]: With dead ends: 3861 [2021-06-05 22:46:23,108 INFO L226 Difference]: Without dead ends: 3851 [2021-06-05 22:46:23,108 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 571.5ms TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:46:23,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3851 states. [2021-06-05 22:46:23,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3851 to 3699. [2021-06-05 22:46:23,156 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) [2021-06-05 22:46:23,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3699 states to 3699 states and 14259 transitions. [2021-06-05 22:46:23,165 INFO L78 Accepts]: Start accepts. Automaton has 3699 states and 14259 transitions. Word has length 24 [2021-06-05 22:46:23,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:23,165 INFO L482 AbstractCegarLoop]: Abstraction has 3699 states and 14259 transitions. [2021-06-05 22:46:23,165 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) [2021-06-05 22:46:23,165 INFO L276 IsEmpty]: Start isEmpty. Operand 3699 states and 14259 transitions. [2021-06-05 22:46:23,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:46:23,170 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:23,170 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:23,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable820,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:23,371 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:46:23,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:23,371 INFO L82 PathProgramCache]: Analyzing trace with hash -572743186, now seen corresponding path program 43 times [2021-06-05 22:46:23,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:23,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121184227] [2021-06-05 22:46:23,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:23,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:23,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:23,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:23,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121184227] [2021-06-05 22:46:23,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121184227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:23,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980611903] [2021-06-05 22:46:23,531 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 [2021-06-05 22:46:23,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:23,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:46:23,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:23,641 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 [2021-06-05 22:46:23,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:46:23,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:23,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:46:23,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:10 [2021-06-05 22:46:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:23,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980611903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:23,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:23,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-05 22:46:23,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488610255] [2021-06-05 22:46:23,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:46:23,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:23,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:46:23,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:46:23,670 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) [2021-06-05 22:46:24,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:24,305 INFO L93 Difference]: Finished difference Result 3833 states and 14656 transitions. [2021-06-05 22:46:24,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:46:24,305 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 [2021-06-05 22:46:24,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:24,311 INFO L225 Difference]: With dead ends: 3833 [2021-06-05 22:46:24,311 INFO L226 Difference]: Without dead ends: 3824 [2021-06-05 22:46:24,312 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 497.5ms TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:46:24,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3824 states. [2021-06-05 22:46:24,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3824 to 3704. [2021-06-05 22:46:24,354 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) [2021-06-05 22:46:24,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3704 states to 3704 states and 14283 transitions. [2021-06-05 22:46:24,362 INFO L78 Accepts]: Start accepts. Automaton has 3704 states and 14283 transitions. Word has length 24 [2021-06-05 22:46:24,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:24,362 INFO L482 AbstractCegarLoop]: Abstraction has 3704 states and 14283 transitions. [2021-06-05 22:46:24,362 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) [2021-06-05 22:46:24,362 INFO L276 IsEmpty]: Start isEmpty. Operand 3704 states and 14283 transitions. [2021-06-05 22:46:24,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:46:24,367 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:24,367 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:24,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable821 [2021-06-05 22:46:24,568 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:46:24,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:24,568 INFO L82 PathProgramCache]: Analyzing trace with hash -249157008, now seen corresponding path program 44 times [2021-06-05 22:46:24,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:24,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534662266] [2021-06-05 22:46:24,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:24,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:24,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:24,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:24,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534662266] [2021-06-05 22:46:24,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534662266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:24,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649442893] [2021-06-05 22:46:24,751 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 [2021-06-05 22:46:24,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:46:24,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:24,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:46:24,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:24,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:24,880 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 [2021-06-05 22:46:24,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:46:24,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:24,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:46:24,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:29 [2021-06-05 22:46:25,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:25,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649442893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:25,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:25,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 22:46:25,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138580035] [2021-06-05 22:46:25,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:46:25,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:25,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:46:25,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:46:25,023 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) [2021-06-05 22:46:25,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:25,899 INFO L93 Difference]: Finished difference Result 3927 states and 14879 transitions. [2021-06-05 22:46:25,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:46:25,899 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 [2021-06-05 22:46:25,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:25,906 INFO L225 Difference]: With dead ends: 3927 [2021-06-05 22:46:25,907 INFO L226 Difference]: Without dead ends: 3897 [2021-06-05 22:46:25,907 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 716.4ms TimeCoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:46:25,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3897 states. [2021-06-05 22:46:25,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3897 to 3704. [2021-06-05 22:46:25,958 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) [2021-06-05 22:46:25,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3704 states to 3704 states and 14283 transitions. [2021-06-05 22:46:25,967 INFO L78 Accepts]: Start accepts. Automaton has 3704 states and 14283 transitions. Word has length 24 [2021-06-05 22:46:25,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:25,967 INFO L482 AbstractCegarLoop]: Abstraction has 3704 states and 14283 transitions. [2021-06-05 22:46:25,967 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) [2021-06-05 22:46:25,967 INFO L276 IsEmpty]: Start isEmpty. Operand 3704 states and 14283 transitions. [2021-06-05 22:46:25,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:46:25,973 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:25,973 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:26,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable822 [2021-06-05 22:46:26,173 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:46:26,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:26,173 INFO L82 PathProgramCache]: Analyzing trace with hash 287765660, now seen corresponding path program 266 times [2021-06-05 22:46:26,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:26,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697534004] [2021-06-05 22:46:26,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:26,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:26,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:26,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:26,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697534004] [2021-06-05 22:46:26,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697534004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:26,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257802874] [2021-06-05 22:46:26,327 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 [2021-06-05 22:46:26,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:46:26,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:26,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:46:26,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:26,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:26,500 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 25 treesize of output 31 [2021-06-05 22:46:26,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:46:26,539 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 22:46:26,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:46:26,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:40 [2021-06-05 22:46:26,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:26,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257802874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:26,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:26,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 22:46:26,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396590126] [2021-06-05 22:46:26,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:46:26,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:26,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:46:26,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:46:26,633 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) [2021-06-05 22:46:27,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:27,840 INFO L93 Difference]: Finished difference Result 3922 states and 14870 transitions. [2021-06-05 22:46:27,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:46:27,841 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 [2021-06-05 22:46:27,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:27,848 INFO L225 Difference]: With dead ends: 3922 [2021-06-05 22:46:27,848 INFO L226 Difference]: Without dead ends: 3874 [2021-06-05 22:46:27,848 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 912.9ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:46:27,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3874 states. [2021-06-05 22:46:27,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3874 to 3705. [2021-06-05 22:46:27,897 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) [2021-06-05 22:46:27,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3705 states to 3705 states and 14286 transitions. [2021-06-05 22:46:27,905 INFO L78 Accepts]: Start accepts. Automaton has 3705 states and 14286 transitions. Word has length 24 [2021-06-05 22:46:27,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:27,906 INFO L482 AbstractCegarLoop]: Abstraction has 3705 states and 14286 transitions. [2021-06-05 22:46:27,906 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) [2021-06-05 22:46:27,906 INFO L276 IsEmpty]: Start isEmpty. Operand 3705 states and 14286 transitions. [2021-06-05 22:46:27,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:46:27,911 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:27,911 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:28,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable826,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:28,112 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:46:28,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:28,112 INFO L82 PathProgramCache]: Analyzing trace with hash 82847526, now seen corresponding path program 45 times [2021-06-05 22:46:28,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:28,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681380660] [2021-06-05 22:46:28,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:28,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:28,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:28,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681380660] [2021-06-05 22:46:28,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681380660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:28,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995355581] [2021-06-05 22:46:28,289 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 [2021-06-05 22:46:28,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:46:28,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:28,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:46:28,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:28,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:28,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:28,451 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 [2021-06-05 22:46:28,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 22:46:28,505 INFO L628 ElimStorePlain]: treesize reduction 129, result has 17.8 percent of original size [2021-06-05 22:46:28,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:46:28,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:28 [2021-06-05 22:46:28,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:28,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995355581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:28,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:28,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-06-05 22:46:28,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342746083] [2021-06-05 22:46:28,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:46:28,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:28,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:46:28,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:46:28,602 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) [2021-06-05 22:46:29,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:29,806 INFO L93 Difference]: Finished difference Result 3880 states and 14772 transitions. [2021-06-05 22:46:29,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:46:29,806 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 [2021-06-05 22:46:29,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:29,813 INFO L225 Difference]: With dead ends: 3880 [2021-06-05 22:46:29,813 INFO L226 Difference]: Without dead ends: 3850 [2021-06-05 22:46:29,813 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 953.3ms TimeCoverageRelationStatistics Valid=186, Invalid=1794, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:46:29,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3850 states. [2021-06-05 22:46:29,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3850 to 3722. [2021-06-05 22:46:29,860 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) [2021-06-05 22:46:29,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3722 states to 3722 states and 14351 transitions. [2021-06-05 22:46:29,869 INFO L78 Accepts]: Start accepts. Automaton has 3722 states and 14351 transitions. Word has length 24 [2021-06-05 22:46:29,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:29,869 INFO L482 AbstractCegarLoop]: Abstraction has 3722 states and 14351 transitions. [2021-06-05 22:46:29,869 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) [2021-06-05 22:46:29,869 INFO L276 IsEmpty]: Start isEmpty. Operand 3722 states and 14351 transitions. [2021-06-05 22:46:29,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:46:29,875 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:29,875 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:30,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable831 [2021-06-05 22:46:30,075 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:46:30,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:30,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1902673252, now seen corresponding path program 46 times [2021-06-05 22:46:30,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:30,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389886526] [2021-06-05 22:46:30,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:30,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:30,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:30,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389886526] [2021-06-05 22:46:30,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389886526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:30,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623731145] [2021-06-05 22:46:30,252 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 [2021-06-05 22:46:30,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:46:30,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:30,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:46:30,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:30,388 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 25 treesize of output 15 [2021-06-05 22:46:30,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:46:30,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:30,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:46:30,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-06-05 22:46:30,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:30,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623731145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:30,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:30,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 22:46:30,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826668746] [2021-06-05 22:46:30,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:46:30,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:30,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:46:30,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:46:30,435 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) [2021-06-05 22:46:31,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:31,249 INFO L93 Difference]: Finished difference Result 3859 states and 14748 transitions. [2021-06-05 22:46:31,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:46:31,249 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 [2021-06-05 22:46:31,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:31,255 INFO L225 Difference]: With dead ends: 3859 [2021-06-05 22:46:31,255 INFO L226 Difference]: Without dead ends: 3850 [2021-06-05 22:46:31,256 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 593.7ms TimeCoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:46:31,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3850 states. [2021-06-05 22:46:31,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3850 to 3722. [2021-06-05 22:46:31,297 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) [2021-06-05 22:46:31,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3722 states to 3722 states and 14355 transitions. [2021-06-05 22:46:31,305 INFO L78 Accepts]: Start accepts. Automaton has 3722 states and 14355 transitions. Word has length 24 [2021-06-05 22:46:31,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:31,305 INFO L482 AbstractCegarLoop]: Abstraction has 3722 states and 14355 transitions. [2021-06-05 22:46:31,305 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) [2021-06-05 22:46:31,305 INFO L276 IsEmpty]: Start isEmpty. Operand 3722 states and 14355 transitions. [2021-06-05 22:46:31,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:46:31,310 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:31,310 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:31,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable843,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:31,510 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:46:31,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:31,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1920666464, now seen corresponding path program 267 times [2021-06-05 22:46:31,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:31,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594264485] [2021-06-05 22:46:31,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:31,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:31,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:31,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594264485] [2021-06-05 22:46:31,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594264485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:31,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033765515] [2021-06-05 22:46:31,693 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 [2021-06-05 22:46:31,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:46:31,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:31,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:46:31,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:31,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:31,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:31,910 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 [2021-06-05 22:46:31,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:46:31,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:31,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:46:31,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 22:46:31,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:31,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033765515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:31,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:31,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:46:31,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416576124] [2021-06-05 22:46:31,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:46:31,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:31,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:46:31,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:46:31,944 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) [2021-06-05 22:46:32,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:32,898 INFO L93 Difference]: Finished difference Result 4132 states and 15604 transitions. [2021-06-05 22:46:32,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:46:32,899 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 [2021-06-05 22:46:32,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:32,906 INFO L225 Difference]: With dead ends: 4132 [2021-06-05 22:46:32,906 INFO L226 Difference]: Without dead ends: 4123 [2021-06-05 22:46:32,906 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 690.9ms TimeCoverageRelationStatistics Valid=231, Invalid=1251, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:46:32,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2021-06-05 22:46:32,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 3725. [2021-06-05 22:46:32,965 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) [2021-06-05 22:46:32,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3725 states to 3725 states and 14365 transitions. [2021-06-05 22:46:32,973 INFO L78 Accepts]: Start accepts. Automaton has 3725 states and 14365 transitions. Word has length 24 [2021-06-05 22:46:32,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:32,973 INFO L482 AbstractCegarLoop]: Abstraction has 3725 states and 14365 transitions. [2021-06-05 22:46:32,973 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) [2021-06-05 22:46:32,973 INFO L276 IsEmpty]: Start isEmpty. Operand 3725 states and 14365 transitions. [2021-06-05 22:46:32,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:46:32,978 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:32,978 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:33,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable844 [2021-06-05 22:46:33,178 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:46:33,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:33,179 INFO L82 PathProgramCache]: Analyzing trace with hash 30631814, now seen corresponding path program 268 times [2021-06-05 22:46:33,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:33,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850038191] [2021-06-05 22:46:33,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:33,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:33,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:33,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:33,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850038191] [2021-06-05 22:46:33,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850038191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:33,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780449514] [2021-06-05 22:46:33,353 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 [2021-06-05 22:46:33,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:46:33,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:33,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:46:33,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:33,513 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 [2021-06-05 22:46:33,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:46:33,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:33,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:46:33,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:46:33,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:33,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780449514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:33,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:33,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:46:33,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654592253] [2021-06-05 22:46:33,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:46:33,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:33,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:46:33,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:46:33,543 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) [2021-06-05 22:46:34,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:34,493 INFO L93 Difference]: Finished difference Result 4103 states and 15510 transitions. [2021-06-05 22:46:34,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:46:34,494 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 [2021-06-05 22:46:34,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:34,501 INFO L225 Difference]: With dead ends: 4103 [2021-06-05 22:46:34,501 INFO L226 Difference]: Without dead ends: 4094 [2021-06-05 22:46:34,501 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 794.6ms TimeCoverageRelationStatistics Valid=267, Invalid=1455, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:46:34,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4094 states. [2021-06-05 22:46:34,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4094 to 3726. [2021-06-05 22:46:34,550 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) [2021-06-05 22:46:34,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3726 states to 3726 states and 14369 transitions. [2021-06-05 22:46:34,558 INFO L78 Accepts]: Start accepts. Automaton has 3726 states and 14369 transitions. Word has length 24 [2021-06-05 22:46:34,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:34,558 INFO L482 AbstractCegarLoop]: Abstraction has 3726 states and 14369 transitions. [2021-06-05 22:46:34,558 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) [2021-06-05 22:46:34,559 INFO L276 IsEmpty]: Start isEmpty. Operand 3726 states and 14369 transitions. [2021-06-05 22:46:34,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:46:34,564 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:34,564 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:34,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable845,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:34,780 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:46:34,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:34,780 INFO L82 PathProgramCache]: Analyzing trace with hash -855166466, now seen corresponding path program 269 times [2021-06-05 22:46:34,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:34,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003275443] [2021-06-05 22:46:34,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:34,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:34,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:34,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:34,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003275443] [2021-06-05 22:46:34,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003275443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:34,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843213571] [2021-06-05 22:46:34,965 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 [2021-06-05 22:46:34,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:46:34,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:34,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:46:34,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:35,150 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 [2021-06-05 22:46:35,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:46:35,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:35,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:46:35,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:46:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:35,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843213571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:35,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:35,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:46:35,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229302959] [2021-06-05 22:46:35,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:46:35,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:35,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:46:35,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:46:35,178 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) [2021-06-05 22:46:36,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:36,262 INFO L93 Difference]: Finished difference Result 4151 states and 15678 transitions. [2021-06-05 22:46:36,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:46:36,262 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 [2021-06-05 22:46:36,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:36,270 INFO L225 Difference]: With dead ends: 4151 [2021-06-05 22:46:36,270 INFO L226 Difference]: Without dead ends: 4141 [2021-06-05 22:46:36,270 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 841.0ms TimeCoverageRelationStatistics Valid=277, Invalid=1529, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:46:36,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4141 states. [2021-06-05 22:46:36,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4141 to 3725. [2021-06-05 22:46:36,319 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) [2021-06-05 22:46:36,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3725 states to 3725 states and 14367 transitions. [2021-06-05 22:46:36,328 INFO L78 Accepts]: Start accepts. Automaton has 3725 states and 14367 transitions. Word has length 24 [2021-06-05 22:46:36,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:36,328 INFO L482 AbstractCegarLoop]: Abstraction has 3725 states and 14367 transitions. [2021-06-05 22:46:36,328 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) [2021-06-05 22:46:36,328 INFO L276 IsEmpty]: Start isEmpty. Operand 3725 states and 14367 transitions. [2021-06-05 22:46:36,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:46:36,333 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:36,333 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:36,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable846 [2021-06-05 22:46:36,534 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:46:36,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:36,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1883316326, now seen corresponding path program 270 times [2021-06-05 22:46:36,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:36,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838758553] [2021-06-05 22:46:36,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:36,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:36,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:36,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:36,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838758553] [2021-06-05 22:46:36,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838758553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:36,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233228630] [2021-06-05 22:46:36,705 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 [2021-06-05 22:46:36,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:46:36,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:36,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:46:36,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:36,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:36,880 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 [2021-06-05 22:46:36,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:46:36,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:36,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:46:36,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:46:36,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:36,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233228630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:36,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:36,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:46:36,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809874692] [2021-06-05 22:46:36,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:46:36,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:36,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:46:36,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:46:36,965 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) [2021-06-05 22:46:37,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:37,710 INFO L93 Difference]: Finished difference Result 4089 states and 15483 transitions. [2021-06-05 22:46:37,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:46:37,711 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 [2021-06-05 22:46:37,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:37,717 INFO L225 Difference]: With dead ends: 4089 [2021-06-05 22:46:37,717 INFO L226 Difference]: Without dead ends: 4080 [2021-06-05 22:46:37,718 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 724.3ms TimeCoverageRelationStatistics Valid=263, Invalid=1377, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:46:37,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4080 states. [2021-06-05 22:46:37,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4080 to 3730. [2021-06-05 22:46:37,762 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) [2021-06-05 22:46:37,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3730 states to 3730 states and 14383 transitions. [2021-06-05 22:46:37,770 INFO L78 Accepts]: Start accepts. Automaton has 3730 states and 14383 transitions. Word has length 24 [2021-06-05 22:46:37,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:37,770 INFO L482 AbstractCegarLoop]: Abstraction has 3730 states and 14383 transitions. [2021-06-05 22:46:37,770 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) [2021-06-05 22:46:37,770 INFO L276 IsEmpty]: Start isEmpty. Operand 3730 states and 14383 transitions. [2021-06-05 22:46:37,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:46:37,776 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:37,776 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:37,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable847,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:37,976 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:46:37,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:37,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1559730148, now seen corresponding path program 271 times [2021-06-05 22:46:37,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:37,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800315238] [2021-06-05 22:46:37,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:37,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:38,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:38,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800315238] [2021-06-05 22:46:38,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800315238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:38,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133186458] [2021-06-05 22:46:38,153 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 [2021-06-05 22:46:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:38,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:46:38,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:38,300 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 [2021-06-05 22:46:38,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:46:38,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:38,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:46:38,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:46:38,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:38,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133186458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:38,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:38,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:46:38,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83844006] [2021-06-05 22:46:38,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:46:38,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:38,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:46:38,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:46:38,349 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) [2021-06-05 22:46:39,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:39,144 INFO L93 Difference]: Finished difference Result 4164 states and 15742 transitions. [2021-06-05 22:46:39,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:46:39,145 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 [2021-06-05 22:46:39,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:39,152 INFO L225 Difference]: With dead ends: 4164 [2021-06-05 22:46:39,152 INFO L226 Difference]: Without dead ends: 4153 [2021-06-05 22:46:39,152 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 716.7ms TimeCoverageRelationStatistics Valid=245, Invalid=1477, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:46:39,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4153 states. [2021-06-05 22:46:39,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4153 to 3724. [2021-06-05 22:46:39,213 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) [2021-06-05 22:46:39,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3724 states to 3724 states and 14363 transitions. [2021-06-05 22:46:39,221 INFO L78 Accepts]: Start accepts. Automaton has 3724 states and 14363 transitions. Word has length 24 [2021-06-05 22:46:39,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:39,221 INFO L482 AbstractCegarLoop]: Abstraction has 3724 states and 14363 transitions. [2021-06-05 22:46:39,221 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) [2021-06-05 22:46:39,221 INFO L276 IsEmpty]: Start isEmpty. Operand 3724 states and 14363 transitions. [2021-06-05 22:46:39,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:46:39,227 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:39,227 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:39,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable849,423 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:39,427 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 22:46:39,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:39,428 INFO L82 PathProgramCache]: Analyzing trace with hash 208494864, now seen corresponding path program 272 times [2021-06-05 22:46:39,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:39,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866551643] [2021-06-05 22:46:39,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:39,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:39,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:39,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:39,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866551643] [2021-06-05 22:46:39,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866551643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:39,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769410255] [2021-06-05 22:46:39,644 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 [2021-06-05 22:46:39,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:46:39,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:39,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:46:39,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:39,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:46:39,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:46:39,869 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 [2021-06-05 22:46:39,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:46:39,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:46:39,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:46:39,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 22:46:39,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:39,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769410255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:39,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:39,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:46:39,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544018263] [2021-06-05 22:46:39,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:46:39,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:39,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:46:39,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:46:39,905 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) Received shutdown request... [2021-06-05 22:46:40,299 WARN L222 SmtUtils]: Removed 4 from assertion stack [2021-06-05 22:46:40,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:46:40,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable850,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:40,500 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 22:46:40,500 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was TIMEOUT (3/3) [2021-06-05 22:46:40,501 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 22:46:40,502 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 22:46:40,502 INFO L202 PluginConnector]: Adding new model parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 10:46:40 BasicIcfg [2021-06-05 22:46:40,502 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 22:46:40,502 INFO L168 Benchmark]: Toolchain (without parser) took 825981.75 ms. Allocated memory was 346.0 MB in the beginning and 887.1 MB in the end (delta: 541.1 MB). Free memory was 325.5 MB in the beginning and 574.8 MB in the end (delta: -249.3 MB). Peak memory consumption was 294.7 MB. Max. memory is 16.0 GB. [2021-06-05 22:46:40,502 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 346.0 MB. Free memory was 326.8 MB in the beginning and 326.7 MB in the end (delta: 125.9 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 22:46:40,503 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.22 ms. Allocated memory is still 346.0 MB. Free memory was 325.5 MB in the beginning and 324.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 22:46:40,503 INFO L168 Benchmark]: Boogie Preprocessor took 11.71 ms. Allocated memory is still 346.0 MB. Free memory was 324.0 MB in the beginning and 323.1 MB in the end (delta: 876.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 22:46:40,503 INFO L168 Benchmark]: RCFGBuilder took 333.58 ms. Allocated memory is still 346.0 MB. Free memory was 323.0 MB in the beginning and 307.3 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 22:46:40,503 INFO L168 Benchmark]: TraceAbstraction took 825549.31 ms. Allocated memory was 346.0 MB in the beginning and 887.1 MB in the end (delta: 541.1 MB). Free memory was 306.8 MB in the beginning and 574.8 MB in the end (delta: -268.0 MB). Peak memory consumption was 275.8 MB. Max. memory is 16.0 GB. [2021-06-05 22:46:40,503 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 0.10 ms. Allocated memory is still 346.0 MB. Free memory was 326.8 MB in the beginning and 326.7 MB in the end (delta: 125.9 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.22 ms. Allocated memory is still 346.0 MB. Free memory was 325.5 MB in the beginning and 324.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.71 ms. Allocated memory is still 346.0 MB. Free memory was 324.0 MB in the beginning and 323.1 MB in the end (delta: 876.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 333.58 ms. Allocated memory is still 346.0 MB. Free memory was 323.0 MB in the beginning and 307.3 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 825549.31 ms. Allocated memory was 346.0 MB in the beginning and 887.1 MB in the end (delta: 541.1 MB). Free memory was 306.8 MB in the beginning and 574.8 MB in the end (delta: -268.0 MB). Peak memory consumption was 275.8 MB. Max. memory is 16.0 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 (3724states) and FLOYD_HOARE automaton (currently 16 states, 24 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 19 for 7ms.. - 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: 42.9ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 10.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 30.0ms, 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: 13.6ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 2.8ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.8ms, 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: 825319.8ms, OverallIterations: 435, TraceHistogramMax: 2, EmptinessCheckTime: 1249.7ms, AutomataDifference: 565352.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 3.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 29282 SDtfs, 83890 SDslu, 264671 SDs, 0 SdLazy, 399985 SolverSat, 45746 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 162543.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25612 GetRequests, 6406 SyntacticMatches, 521 SemanticMatches, 18684 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280633 ImplicationChecksByTransitivity, 462566.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3730occurred in iteration=433, InterpolantAutomatonStates: 16246, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 13566.0ms AutomataMinimizationTime, 434 MinimizatonAttempts, 262351 StatesRemovedByMinimization, 433 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1577.0ms SsaConstructionTime, 3946.2ms SatisfiabilityAnalysisTime, 144560.5ms InterpolantComputationTime, 20060 NumberOfCodeBlocks, 20060 NumberOfCodeBlocksAsserted, 1323 NumberOfCheckSat, 19202 ConstructedInterpolants, 454 QuantifiedInterpolants, 276150 SizeOfPredicates, 3410 NumberOfNonLiveVariables, 34734 ConjunctsInSsa, 12742 ConjunctsInUnsatCore, 858 InterpolantComputations, 12 PerfectInterpolantSequences, 165/5018 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