/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 19:51:41,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 19:51:41,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 19:51:41,993 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-12 19:51:42,043 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 [2021-08-12 19:51:42,057 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 19:51:42,057 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 19:51:42,057 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 19:51:42,058 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 19:51:42,058 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 19:51:42,059 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 19:51:42,059 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 19:51:42,059 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 19:51:42,059 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 19:51:42,059 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 19:51:42,059 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 19:51:42,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 19:51:42,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 19:51:42,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 19:51:42,059 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 19:51:42,059 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 19:51:42,060 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 19:51:42,060 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 19:51:42,060 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 19:51:42,060 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 19:51:42,060 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 19:51:42,060 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 19:51:42,060 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 19:51:42,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 19:51:42,060 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 19:51:42,061 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 19:51:42,061 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 19:51:42,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 19:51:42,061 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 19:51:42,061 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 19:51:42,061 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 19:51:42,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 19:51:42,288 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 19:51:42,290 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 19:51:42,291 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-12 19:51:42,292 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-12 19:51:42,292 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq.wvr.bpl [2021-08-12 19:51:42,293 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq.wvr.bpl' [2021-08-12 19:51:42,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 19:51:42,324 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-12 19:51:42,324 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 19:51:42,325 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 19:51:42,325 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 19:51:42,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:51:42" (1/1) ... [2021-08-12 19:51:42,343 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:51:42" (1/1) ... [2021-08-12 19:51:42,349 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 19:51:42,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 19:51:42,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 19:51:42,351 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 19:51:42,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:51:42" (1/1) ... [2021-08-12 19:51:42,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:51:42" (1/1) ... [2021-08-12 19:51:42,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:51:42" (1/1) ... [2021-08-12 19:51:42,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:51:42" (1/1) ... [2021-08-12 19:51:42,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:51:42" (1/1) ... [2021-08-12 19:51:42,363 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:51:42" (1/1) ... [2021-08-12 19:51:42,363 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:51:42" (1/1) ... [2021-08-12 19:51:42,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 19:51:42,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 19:51:42,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 19:51:42,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 19:51:42,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:51:42" (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 [2021-08-12 19:51:42,431 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-12 19:51:42,433 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-12 19:51:42,433 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-12 19:51:42,433 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-12 19:51:42,433 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-12 19:51:42,433 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-12 19:51:42,434 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-12 19:51:42,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 19:51:42,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 19:51:42,435 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 19:51:42,669 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 19:51:42,669 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-12 19:51:42,671 INFO L202 PluginConnector]: Adding new model inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:51:42 BoogieIcfgContainer [2021-08-12 19:51:42,671 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 19:51:42,672 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 19:51:42,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 19:51:42,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 19:51:42,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:51:42" (1/2) ... [2021-08-12 19:51:42,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@251833f4 and model type inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 07:51:42, skipping insertion in model container [2021-08-12 19:51:42,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:51:42" (2/2) ... [2021-08-12 19:51:42,676 INFO L111 eAbstractionObserver]: Analyzing ICFG inc-subseq.wvr.bpl [2021-08-12 19:51:42,680 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 19:51:42,680 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 19:51:42,681 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 19:51:42,717 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-12 19:51:42,733 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-12 19:51:42,760 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 19:51:42,760 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 19:51:42,760 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 19:51:42,760 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 19:51:42,761 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 19:51:42,761 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 19:51:42,761 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 19:51:42,761 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 19:51:42,771 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 72 flow [2021-08-12 19:51:42,788 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:42,791 INFO L276 IsEmpty]: Start isEmpty. Operand has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:42,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-12 19:51:42,797 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:51:42,798 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:51:42,798 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:51:42,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:51:42,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1034289359, now seen corresponding path program 1 times [2021-08-12 19:51:42,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:51:42,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207136771] [2021-08-12 19:51:42,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:51:42,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:51:42,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:42,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:51:42,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207136771] [2021-08-12 19:51:42,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207136771] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:51:42,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:51:42,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:51:42,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141253088] [2021-08-12 19:51:42,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 19:51:42,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:51:42,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 19:51:42,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:51:42,932 INFO L87 Difference]: Start difference. First operand has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 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 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:42,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:51:42,973 INFO L93 Difference]: Finished difference Result 108 states and 216 transitions. [2021-08-12 19:51:42,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:51:42,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-12 19:51:42,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:51:42,984 INFO L225 Difference]: With dead ends: 108 [2021-08-12 19:51:42,985 INFO L226 Difference]: Without dead ends: 87 [2021-08-12 19:51:42,986 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:51:43,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-08-12 19:51:43,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2021-08-12 19:51:43,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:43,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 142 transitions. [2021-08-12 19:51:43,033 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 142 transitions. Word has length 14 [2021-08-12 19:51:43,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:51:43,034 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 142 transitions. [2021-08-12 19:51:43,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:43,034 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 142 transitions. [2021-08-12 19:51:43,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 19:51:43,036 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:51:43,036 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:51:43,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 19:51:43,036 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:51:43,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:51:43,039 INFO L82 PathProgramCache]: Analyzing trace with hash -690736212, now seen corresponding path program 1 times [2021-08-12 19:51:43,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:51:43,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300914419] [2021-08-12 19:51:43,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:51:43,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:51:43,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:43,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:51:43,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300914419] [2021-08-12 19:51:43,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300914419] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:51:43,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:51:43,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:51:43,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867994825] [2021-08-12 19:51:43,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:51:43,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:51:43,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:51:43,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:51:43,102 INFO L87 Difference]: Start difference. First operand 71 states and 142 transitions. Second operand has 4 states, 4 states have (on average 4.5) 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) [2021-08-12 19:51:43,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:51:43,141 INFO L93 Difference]: Finished difference Result 142 states and 290 transitions. [2021-08-12 19:51:43,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:51:43,145 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) 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 [2021-08-12 19:51:43,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:51:43,146 INFO L225 Difference]: With dead ends: 142 [2021-08-12 19:51:43,146 INFO L226 Difference]: Without dead ends: 83 [2021-08-12 19:51:43,147 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:51:43,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-08-12 19:51:43,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-08-12 19:51:43,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 82 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:43,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 165 transitions. [2021-08-12 19:51:43,153 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 165 transitions. Word has length 18 [2021-08-12 19:51:43,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:51:43,153 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 165 transitions. [2021-08-12 19:51:43,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) 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) [2021-08-12 19:51:43,153 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 165 transitions. [2021-08-12 19:51:43,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:51:43,154 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:51:43,154 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:51:43,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-12 19:51:43,154 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:51:43,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:51:43,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1451962588, now seen corresponding path program 1 times [2021-08-12 19:51:43,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:51:43,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852560856] [2021-08-12 19:51:43,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:51:43,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:51:43,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:43,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:51:43,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852560856] [2021-08-12 19:51:43,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852560856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:43,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118480921] [2021-08-12 19:51:43,315 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 [2021-08-12 19:51:43,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:51:43,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:51:43,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:51:43,517 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 13 treesize of output 9 [2021-08-12 19:51:43,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:51:43,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:43,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:51:43,528 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-08-12 19:51:43,554 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 11 treesize of output 7 [2021-08-12 19:51:43,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:51:43,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:43,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:51:43,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2021-08-12 19:51:43,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:43,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118480921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:43,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:51:43,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-12 19:51:43,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223489660] [2021-08-12 19:51:43,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:51:43,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:51:43,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:51:43,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:51:43,587 INFO L87 Difference]: Start difference. First operand 83 states and 165 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 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) [2021-08-12 19:51:43,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:51:43,737 INFO L93 Difference]: Finished difference Result 156 states and 316 transitions. [2021-08-12 19:51:43,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:51:43,737 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 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 23 [2021-08-12 19:51:43,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:51:43,742 INFO L225 Difference]: With dead ends: 156 [2021-08-12 19:51:43,742 INFO L226 Difference]: Without dead ends: 137 [2021-08-12 19:51:43,743 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 125.6ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:51:43,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-08-12 19:51:43,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 115. [2021-08-12 19:51:43,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.043859649122807) internal successors, (233), 114 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:43,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 233 transitions. [2021-08-12 19:51:43,760 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 233 transitions. Word has length 23 [2021-08-12 19:51:43,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:51:43,760 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 233 transitions. [2021-08-12 19:51:43,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 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) [2021-08-12 19:51:43,760 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 233 transitions. [2021-08-12 19:51:43,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:51:43,761 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:51:43,761 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:51:43,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-12 19:51:43,962 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:51:43,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:51:43,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1705470663, now seen corresponding path program 2 times [2021-08-12 19:51:43,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:51:43,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727121606] [2021-08-12 19:51:43,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:51:43,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:51:44,009 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:44,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:51:44,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727121606] [2021-08-12 19:51:44,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727121606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:44,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580089052] [2021-08-12 19:51:44,010 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 [2021-08-12 19:51:44,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:51:44,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:51:44,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-12 19:51:44,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:51:44,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:44,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580089052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:44,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:51:44,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-08-12 19:51:44,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292382880] [2021-08-12 19:51:44,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:51:44,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:51:44,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:51:44,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:51:44,102 INFO L87 Difference]: Start difference. First operand 115 states and 233 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:44,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:51:44,186 INFO L93 Difference]: Finished difference Result 335 states and 691 transitions. [2021-08-12 19:51:44,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:51:44,186 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 19:51:44,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:51:44,188 INFO L225 Difference]: With dead ends: 335 [2021-08-12 19:51:44,188 INFO L226 Difference]: Without dead ends: 264 [2021-08-12 19:51:44,189 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:51:44,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-08-12 19:51:44,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 230. [2021-08-12 19:51:44,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1222707423580784) internal successors, (486), 229 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:44,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 486 transitions. [2021-08-12 19:51:44,217 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 486 transitions. Word has length 27 [2021-08-12 19:51:44,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:51:44,217 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 486 transitions. [2021-08-12 19:51:44,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:44,217 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 486 transitions. [2021-08-12 19:51:44,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:51:44,218 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:51:44,218 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:51:44,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:51:44,419 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:51:44,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:51:44,420 INFO L82 PathProgramCache]: Analyzing trace with hash -906793463, now seen corresponding path program 3 times [2021-08-12 19:51:44,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:51:44,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150160721] [2021-08-12 19:51:44,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:51:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:51:44,677 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:44,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:51:44,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150160721] [2021-08-12 19:51:44,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150160721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:44,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744225011] [2021-08-12 19:51:44,678 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 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 [2021-08-12 19:51:44,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:51:44,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:51:44,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 19:51:44,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:51:44,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:44,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2021-08-12 19:51:44,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:51:44,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:44,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:51:44,932 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:16 [2021-08-12 19:51:45,101 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:45,102 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 20 treesize of output 38 [2021-08-12 19:51:45,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:51:45,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:45,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:51:45,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:21 [2021-08-12 19:51:45,226 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:45,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744225011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:45,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:51:45,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-08-12 19:51:45,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622202207] [2021-08-12 19:51:45,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-08-12 19:51:45,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:51:45,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-12 19:51:45,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:51:45,228 INFO L87 Difference]: Start difference. First operand 230 states and 486 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:46,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:51:46,950 INFO L93 Difference]: Finished difference Result 652 states and 1353 transitions. [2021-08-12 19:51:46,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-12 19:51:46,951 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:51:46,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:51:46,953 INFO L225 Difference]: With dead ends: 652 [2021-08-12 19:51:46,953 INFO L226 Difference]: Without dead ends: 573 [2021-08-12 19:51:46,955 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1267.4ms TimeCoverageRelationStatistics Valid=665, Invalid=2875, Unknown=0, NotChecked=0, Total=3540 [2021-08-12 19:51:46,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-08-12 19:51:46,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 386. [2021-08-12 19:51:46,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.1818181818181817) internal successors, (840), 385 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:46,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 840 transitions. [2021-08-12 19:51:46,970 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 840 transitions. Word has length 32 [2021-08-12 19:51:46,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:51:46,971 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 840 transitions. [2021-08-12 19:51:46,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:46,971 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 840 transitions. [2021-08-12 19:51:46,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:51:46,973 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:51:46,973 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:51:47,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:51:47,188 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:51:47,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:51:47,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1731045687, now seen corresponding path program 4 times [2021-08-12 19:51:47,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:51:47,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109062211] [2021-08-12 19:51:47,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:51:47,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:51:47,414 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:51:47,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:51:47,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109062211] [2021-08-12 19:51:47,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109062211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:47,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111331083] [2021-08-12 19:51:47,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:51:47,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:51:47,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:51:47,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-12 19:51:47,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:51:47,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:47,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-08-12 19:51:47,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:51:47,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:47,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-08-12 19:51:47,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-08-12 19:51:47,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:51:47,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:51:47,821 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-08-12 19:51:47,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:51:47,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:47,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:51:47,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-08-12 19:51:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:47,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111331083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:47,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:51:47,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-08-12 19:51:47,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586638377] [2021-08-12 19:51:47,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 19:51:47,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:51:47,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 19:51:47,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:51:47,838 INFO L87 Difference]: Start difference. First operand 386 states and 840 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:48,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:51:48,515 INFO L93 Difference]: Finished difference Result 1042 states and 2200 transitions. [2021-08-12 19:51:48,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 19:51:48,515 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:51:48,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:51:48,519 INFO L225 Difference]: With dead ends: 1042 [2021-08-12 19:51:48,519 INFO L226 Difference]: Without dead ends: 878 [2021-08-12 19:51:48,520 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 569.9ms TimeCoverageRelationStatistics Valid=289, Invalid=1271, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:51:48,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-08-12 19:51:48,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 432. [2021-08-12 19:51:48,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 2.1786542923433876) internal successors, (939), 431 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:48,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 939 transitions. [2021-08-12 19:51:48,539 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 939 transitions. Word has length 32 [2021-08-12 19:51:48,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:51:48,539 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 939 transitions. [2021-08-12 19:51:48,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:48,540 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 939 transitions. [2021-08-12 19:51:48,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:51:48,540 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:51:48,541 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:51:48,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:51:48,759 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:51:48,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:51:48,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1528740313, now seen corresponding path program 5 times [2021-08-12 19:51:48,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:51:48,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688296742] [2021-08-12 19:51:48,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:51:48,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:51:48,959 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:48,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:51:48,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688296742] [2021-08-12 19:51:48,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688296742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:48,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953691424] [2021-08-12 19:51:48,960 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 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 [2021-08-12 19:51:49,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:51:49,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:51:49,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:51:49,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:51:49,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:49,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-08-12 19:51:49,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:51:49,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:49,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-08-12 19:51:49,248 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:24 [2021-08-12 19:51:49,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:51:49,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:51:49,353 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 22 treesize of output 10 [2021-08-12 19:51:49,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:51:49,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:49,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:51:49,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-08-12 19:51:49,376 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:49,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953691424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:49,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:51:49,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-08-12 19:51:49,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101166451] [2021-08-12 19:51:49,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:51:49,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:51:49,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:51:49,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:51:49,377 INFO L87 Difference]: Start difference. First operand 432 states and 939 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:50,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:51:50,159 INFO L93 Difference]: Finished difference Result 1100 states and 2325 transitions. [2021-08-12 19:51:50,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 19:51:50,159 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:51:50,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:51:50,163 INFO L225 Difference]: With dead ends: 1100 [2021-08-12 19:51:50,163 INFO L226 Difference]: Without dead ends: 927 [2021-08-12 19:51:50,164 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 639.2ms TimeCoverageRelationStatistics Valid=295, Invalid=1345, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 19:51:50,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-08-12 19:51:50,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 450. [2021-08-12 19:51:50,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.1848552338530065) internal successors, (981), 449 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:50,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 981 transitions. [2021-08-12 19:51:50,184 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 981 transitions. Word has length 32 [2021-08-12 19:51:50,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:51:50,185 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 981 transitions. [2021-08-12 19:51:50,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:50,185 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 981 transitions. [2021-08-12 19:51:50,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:51:50,185 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:51:50,186 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:51:50,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-12 19:51:50,401 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:51:50,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:51:50,401 INFO L82 PathProgramCache]: Analyzing trace with hash -897893841, now seen corresponding path program 6 times [2021-08-12 19:51:50,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:51:50,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521386613] [2021-08-12 19:51:50,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:51:50,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:51:50,563 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:51:50,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:51:50,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521386613] [2021-08-12 19:51:50,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521386613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:50,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383994566] [2021-08-12 19:51:50,564 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 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 [2021-08-12 19:51:50,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:51:50,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:51:50,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 19:51:50,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:51:50,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:50,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-08-12 19:51:50,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:51:50,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:50,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:51:50,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:18 [2021-08-12 19:51:50,858 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-12 19:51:50,858 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 22 treesize of output 10 [2021-08-12 19:51:50,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:51:50,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:50,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:51:50,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:5 [2021-08-12 19:51:50,872 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:50,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383994566] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:50,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:51:50,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-08-12 19:51:50,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184412143] [2021-08-12 19:51:50,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:51:50,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:51:50,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:51:50,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:51:50,873 INFO L87 Difference]: Start difference. First operand 450 states and 981 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:51,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:51:51,700 INFO L93 Difference]: Finished difference Result 1495 states and 3210 transitions. [2021-08-12 19:51:51,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-12 19:51:51,701 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:51:51,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:51:51,705 INFO L225 Difference]: With dead ends: 1495 [2021-08-12 19:51:51,705 INFO L226 Difference]: Without dead ends: 939 [2021-08-12 19:51:51,706 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 664.2ms TimeCoverageRelationStatistics Valid=378, Invalid=1974, Unknown=0, NotChecked=0, Total=2352 [2021-08-12 19:51:51,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-08-12 19:51:51,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 482. [2021-08-12 19:51:51,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.176715176715177) internal successors, (1047), 481 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:51,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1047 transitions. [2021-08-12 19:51:51,728 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1047 transitions. Word has length 32 [2021-08-12 19:51:51,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:51:51,728 INFO L482 AbstractCegarLoop]: Abstraction has 482 states and 1047 transitions. [2021-08-12 19:51:51,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:51,728 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1047 transitions. [2021-08-12 19:51:51,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:51:51,729 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:51:51,729 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:51:51,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:51:51,947 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:51:51,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:51:51,947 INFO L82 PathProgramCache]: Analyzing trace with hash -960521271, now seen corresponding path program 7 times [2021-08-12 19:51:51,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:51:51,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808601071] [2021-08-12 19:51:51,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:51:51,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:51:52,152 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:52,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:51:52,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808601071] [2021-08-12 19:51:52,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808601071] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:52,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892146483] [2021-08-12 19:51:52,153 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 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 [2021-08-12 19:51:52,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:51:52,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-12 19:51:52,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:51:52,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:52,399 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 26 treesize of output 26 [2021-08-12 19:51:52,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:51:52,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:52,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-08-12 19:51:52,411 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-08-12 19:51:52,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:51:52,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:51:52,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:51:52,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-08-12 19:51:52,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:51:52,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:52,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:51:52,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-08-12 19:51:52,513 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:52,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892146483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:52,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:51:52,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-08-12 19:51:52,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611574228] [2021-08-12 19:51:52,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:51:52,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:51:52,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:51:52,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:51:52,514 INFO L87 Difference]: Start difference. First operand 482 states and 1047 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:53,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:51:53,105 INFO L93 Difference]: Finished difference Result 1064 states and 2255 transitions. [2021-08-12 19:51:53,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:51:53,105 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:51:53,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:51:53,109 INFO L225 Difference]: With dead ends: 1064 [2021-08-12 19:51:53,109 INFO L226 Difference]: Without dead ends: 947 [2021-08-12 19:51:53,110 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 459.8ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:51:53,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-08-12 19:51:53,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 464. [2021-08-12 19:51:53,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.1576673866090714) internal successors, (999), 463 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:53,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 999 transitions. [2021-08-12 19:51:53,156 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 999 transitions. Word has length 32 [2021-08-12 19:51:53,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:51:53,156 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 999 transitions. [2021-08-12 19:51:53,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:53,156 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 999 transitions. [2021-08-12 19:51:53,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 19:51:53,157 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:51:53,157 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:51:53,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:51:53,373 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:51:53,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:51:53,374 INFO L82 PathProgramCache]: Analyzing trace with hash 2010412006, now seen corresponding path program 8 times [2021-08-12 19:51:53,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:51:53,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232302386] [2021-08-12 19:51:53,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:51:53,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:51:53,437 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:53,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:51:53,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232302386] [2021-08-12 19:51:53,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232302386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:53,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558441584] [2021-08-12 19:51:53,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:51:53,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:51:53,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:51:53,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 19:51:53,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:51:53,511 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:53,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558441584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:53,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:51:53,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-08-12 19:51:53,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644176806] [2021-08-12 19:51:53,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:51:53,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:51:53,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:51:53,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:51:53,513 INFO L87 Difference]: Start difference. First operand 464 states and 999 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:53,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:51:53,632 INFO L93 Difference]: Finished difference Result 962 states and 2085 transitions. [2021-08-12 19:51:53,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 19:51:53,632 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-12 19:51:53,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:51:53,636 INFO L225 Difference]: With dead ends: 962 [2021-08-12 19:51:53,636 INFO L226 Difference]: Without dead ends: 844 [2021-08-12 19:51:53,636 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:51:53,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-08-12 19:51:53,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 713. [2021-08-12 19:51:53,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 2.182584269662921) internal successors, (1554), 712 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:53,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1554 transitions. [2021-08-12 19:51:53,667 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1554 transitions. Word has length 36 [2021-08-12 19:51:53,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:51:53,668 INFO L482 AbstractCegarLoop]: Abstraction has 713 states and 1554 transitions. [2021-08-12 19:51:53,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:53,668 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1554 transitions. [2021-08-12 19:51:53,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 19:51:53,669 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:51:53,669 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:51:53,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-08-12 19:51:53,885 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:51:53,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:51:53,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1466399466, now seen corresponding path program 9 times [2021-08-12 19:51:53,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:51:53,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308302246] [2021-08-12 19:51:53,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:51:53,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:51:54,244 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:54,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:51:54,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308302246] [2021-08-12 19:51:54,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308302246] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:54,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728758419] [2021-08-12 19:51:54,245 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 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 [2021-08-12 19:51:54,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 19:51:54,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:51:54,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 19:51:54,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:51:54,571 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:54,571 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 45 treesize of output 53 [2021-08-12 19:51:54,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:51:54,608 INFO L628 ElimStorePlain]: treesize reduction 14, result has 83.5 percent of original size [2021-08-12 19:51:54,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:51:54,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:52 [2021-08-12 19:51:54,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:51:54,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:51:54,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:51:54,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:54,906 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 35 treesize of output 43 [2021-08-12 19:51:54,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:51:54,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:54,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:51:54,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:26 [2021-08-12 19:51:54,993 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:51:54,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728758419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:54,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:51:54,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-08-12 19:51:54,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093301615] [2021-08-12 19:51:54,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-08-12 19:51:54,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:51:54,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-12 19:51:54,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 19:51:54,996 INFO L87 Difference]: Start difference. First operand 713 states and 1554 transitions. Second operand has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:58,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:51:58,768 INFO L93 Difference]: Finished difference Result 2863 states and 6197 transitions. [2021-08-12 19:51:58,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-08-12 19:51:58,768 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-12 19:51:58,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:51:58,777 INFO L225 Difference]: With dead ends: 2863 [2021-08-12 19:51:58,777 INFO L226 Difference]: Without dead ends: 2548 [2021-08-12 19:51:58,779 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3752 ImplicationChecksByTransitivity, 2894.7ms TimeCoverageRelationStatistics Valid=1451, Invalid=10321, Unknown=0, NotChecked=0, Total=11772 [2021-08-12 19:51:58,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2021-08-12 19:51:58,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 737. [2021-08-12 19:51:58,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.1480978260869565) internal successors, (1581), 736 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:58,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1581 transitions. [2021-08-12 19:51:58,826 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1581 transitions. Word has length 41 [2021-08-12 19:51:58,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:51:58,827 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 1581 transitions. [2021-08-12 19:51:58,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:51:58,827 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1581 transitions. [2021-08-12 19:51:58,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 19:51:58,828 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:51:58,828 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:51:59,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:51:59,046 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:51:59,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:51:59,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1999894166, now seen corresponding path program 10 times [2021-08-12 19:51:59,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:51:59,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792294686] [2021-08-12 19:51:59,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:51:59,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:51:59,320 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:51:59,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:51:59,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792294686] [2021-08-12 19:51:59,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792294686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:51:59,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564421175] [2021-08-12 19:51:59,321 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 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 [2021-08-12 19:51:59,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:51:59,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:51:59,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-12 19:51:59,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:51:59,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:51:59,891 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 42 treesize of output 52 [2021-08-12 19:51:59,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:51:59,936 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-08-12 19:51:59,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-08-12 19:51:59,946 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-08-12 19:52:00,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:00,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:00,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:00,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:00,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:00,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:00,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:52:00,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:52:00,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:52:00,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:52:00,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-08-12 19:52:00,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:52:00,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:00,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:00,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:00,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:00,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:00,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:00,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:52:00,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:52:00,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-08-12 19:52:00,256 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:52:00,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:52:00,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:52:00,263 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:104, output treesize:5 [2021-08-12 19:52:00,272 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:52:00,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564421175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:52:00,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:52:00,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-08-12 19:52:00,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649180232] [2021-08-12 19:52:00,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-08-12 19:52:00,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:52:00,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-12 19:52:00,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 19:52:00,274 INFO L87 Difference]: Start difference. First operand 737 states and 1581 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:02,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:52:02,343 INFO L93 Difference]: Finished difference Result 2321 states and 4955 transitions. [2021-08-12 19:52:02,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-12 19:52:02,343 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-12 19:52:02,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:52:02,350 INFO L225 Difference]: With dead ends: 2321 [2021-08-12 19:52:02,350 INFO L226 Difference]: Without dead ends: 2145 [2021-08-12 19:52:02,351 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 1615.7ms TimeCoverageRelationStatistics Valid=673, Invalid=4297, Unknown=0, NotChecked=0, Total=4970 [2021-08-12 19:52:02,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-08-12 19:52:02,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 854. [2021-08-12 19:52:02,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 2.138335287221571) internal successors, (1824), 853 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:02,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1824 transitions. [2021-08-12 19:52:02,410 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1824 transitions. Word has length 41 [2021-08-12 19:52:02,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:52:02,410 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 1824 transitions. [2021-08-12 19:52:02,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:02,410 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1824 transitions. [2021-08-12 19:52:02,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 19:52:02,411 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:52:02,411 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:52:02,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-12 19:52:02,615 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:52:02,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:52:02,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1038925816, now seen corresponding path program 11 times [2021-08-12 19:52:02,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:52:02,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168918957] [2021-08-12 19:52:02,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:52:02,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:52:02,938 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:52:02,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:52:02,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168918957] [2021-08-12 19:52:02,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168918957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:52:02,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609222750] [2021-08-12 19:52:02,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:52:02,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 19:52:02,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:52:02,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-12 19:52:02,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:52:03,455 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:52:03,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 50 [2021-08-12 19:52:03,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:52:03,489 INFO L628 ElimStorePlain]: treesize reduction 43, result has 58.7 percent of original size [2021-08-12 19:52:03,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:52:03,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:29 [2021-08-12 19:52:03,555 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-12 19:52:03,555 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 33 treesize of output 13 [2021-08-12 19:52:03,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:52:03,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:52:03,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:52:03,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:5 [2021-08-12 19:52:03,568 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:52:03,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609222750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:52:03,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:52:03,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-08-12 19:52:03,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639528667] [2021-08-12 19:52:03,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-08-12 19:52:03,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:52:03,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-12 19:52:03,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 19:52:03,570 INFO L87 Difference]: Start difference. First operand 854 states and 1824 transitions. Second operand has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:05,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:52:05,704 INFO L93 Difference]: Finished difference Result 2447 states and 5219 transitions. [2021-08-12 19:52:05,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-12 19:52:05,705 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-12 19:52:05,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:52:05,712 INFO L225 Difference]: With dead ends: 2447 [2021-08-12 19:52:05,712 INFO L226 Difference]: Without dead ends: 2232 [2021-08-12 19:52:05,713 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 1554.3ms TimeCoverageRelationStatistics Valid=593, Invalid=4519, Unknown=0, NotChecked=0, Total=5112 [2021-08-12 19:52:05,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2021-08-12 19:52:05,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 956. [2021-08-12 19:52:05,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 2.1382198952879583) internal successors, (2042), 955 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:05,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 2042 transitions. [2021-08-12 19:52:05,786 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 2042 transitions. Word has length 41 [2021-08-12 19:52:05,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:52:05,787 INFO L482 AbstractCegarLoop]: Abstraction has 956 states and 2042 transitions. [2021-08-12 19:52:05,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:05,787 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 2042 transitions. [2021-08-12 19:52:05,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 19:52:05,789 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:52:05,789 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:52:06,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-12 19:52:06,005 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:52:06,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:52:06,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1257871970, now seen corresponding path program 12 times [2021-08-12 19:52:06,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:52:06,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736890116] [2021-08-12 19:52:06,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:52:06,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:52:06,310 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:52:06,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:52:06,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736890116] [2021-08-12 19:52:06,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736890116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:52:06,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221748711] [2021-08-12 19:52:06,311 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 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 [2021-08-12 19:52:06,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 19:52:06,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:52:06,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 19:52:06,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:52:07,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:52:07,039 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 47 treesize of output 77 [2021-08-12 19:52:07,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:52:07,130 INFO L628 ElimStorePlain]: treesize reduction 197, result has 27.3 percent of original size [2021-08-12 19:52:07,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-08-12 19:52:07,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:53, output treesize:47 [2021-08-12 19:52:07,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:07,750 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:52:07,750 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 29 treesize of output 63 [2021-08-12 19:52:07,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-08-12 19:52:07,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:07,802 INFO L354 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2021-08-12 19:52:07,802 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 40 treesize of output 1 [2021-08-12 19:52:07,803 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:52:07,823 INFO L628 ElimStorePlain]: treesize reduction 21, result has 54.3 percent of original size [2021-08-12 19:52:07,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:52:07,827 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:88, output treesize:21 [2021-08-12 19:52:07,898 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:52:07,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221748711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:52:07,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:52:07,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2021-08-12 19:52:07,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943617849] [2021-08-12 19:52:07,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-08-12 19:52:07,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:52:07,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-12 19:52:07,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1354, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:52:07,900 INFO L87 Difference]: Start difference. First operand 956 states and 2042 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:09,272 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-08-12 19:52:21,062 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2021-08-12 19:52:22,059 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-08-12 19:52:23,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:52:23,657 INFO L93 Difference]: Finished difference Result 4032 states and 8636 transitions. [2021-08-12 19:52:23,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-08-12 19:52:23,657 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-12 19:52:23,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:52:23,668 INFO L225 Difference]: With dead ends: 4032 [2021-08-12 19:52:23,668 INFO L226 Difference]: Without dead ends: 3813 [2021-08-12 19:52:23,673 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11305 ImplicationChecksByTransitivity, 11387.8ms TimeCoverageRelationStatistics Valid=3722, Invalid=26380, Unknown=0, NotChecked=0, Total=30102 [2021-08-12 19:52:23,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2021-08-12 19:52:23,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 1122. [2021-08-12 19:52:23,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 2.145405887600357) internal successors, (2405), 1121 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:23,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 2405 transitions. [2021-08-12 19:52:23,791 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 2405 transitions. Word has length 41 [2021-08-12 19:52:23,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:52:23,792 INFO L482 AbstractCegarLoop]: Abstraction has 1122 states and 2405 transitions. [2021-08-12 19:52:23,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:23,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 2405 transitions. [2021-08-12 19:52:23,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 19:52:23,797 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:52:23,798 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:52:24,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:52:24,013 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:52:24,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:52:24,014 INFO L82 PathProgramCache]: Analyzing trace with hash -2064541460, now seen corresponding path program 13 times [2021-08-12 19:52:24,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:52:24,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128863246] [2021-08-12 19:52:24,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:52:24,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:52:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:52:24,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:52:24,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128863246] [2021-08-12 19:52:24,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128863246] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:52:24,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127373212] [2021-08-12 19:52:24,317 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 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 [2021-08-12 19:52:24,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:52:24,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-12 19:52:24,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:52:24,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:52:24,925 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 42 treesize of output 52 [2021-08-12 19:52:24,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:52:24,965 INFO L628 ElimStorePlain]: treesize reduction 47, result has 60.8 percent of original size [2021-08-12 19:52:24,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-08-12 19:52:24,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:41 [2021-08-12 19:52:25,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:25,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:52:25,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:25,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:25,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:25,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:25,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:52:25,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-08-12 19:52:25,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:52:25,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:52:25,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:52:25,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-08-12 19:52:25,073 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:52:25,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127373212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:52:25,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:52:25,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-08-12 19:52:25,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935809518] [2021-08-12 19:52:25,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-08-12 19:52:25,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:52:25,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-12 19:52:25,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 19:52:25,075 INFO L87 Difference]: Start difference. First operand 1122 states and 2405 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:28,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:52:28,008 INFO L93 Difference]: Finished difference Result 4047 states and 8713 transitions. [2021-08-12 19:52:28,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-12 19:52:28,008 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-12 19:52:28,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:52:28,019 INFO L225 Difference]: With dead ends: 4047 [2021-08-12 19:52:28,019 INFO L226 Difference]: Without dead ends: 3805 [2021-08-12 19:52:28,020 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 1417.0ms TimeCoverageRelationStatistics Valid=578, Invalid=3582, Unknown=0, NotChecked=0, Total=4160 [2021-08-12 19:52:28,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2021-08-12 19:52:28,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 1424. [2021-08-12 19:52:28,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1423 states have (on average 2.1377371749824317) internal successors, (3042), 1423 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:28,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 3042 transitions. [2021-08-12 19:52:28,158 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 3042 transitions. Word has length 41 [2021-08-12 19:52:28,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:52:28,159 INFO L482 AbstractCegarLoop]: Abstraction has 1424 states and 3042 transitions. [2021-08-12 19:52:28,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:28,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 3042 transitions. [2021-08-12 19:52:28,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 19:52:28,161 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:52:28,161 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:52:28,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-08-12 19:52:28,369 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:52:28,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:52:28,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1195244540, now seen corresponding path program 14 times [2021-08-12 19:52:28,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:52:28,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160470973] [2021-08-12 19:52:28,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:52:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:52:28,709 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:52:28,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:52:28,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160470973] [2021-08-12 19:52:28,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160470973] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:52:28,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348229706] [2021-08-12 19:52:28,710 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 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 [2021-08-12 19:52:28,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:52:28,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:52:28,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-12 19:52:28,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:52:29,257 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:52:29,257 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 42 treesize of output 52 [2021-08-12 19:52:29,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:52:29,296 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-08-12 19:52:29,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-08-12 19:52:29,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-08-12 19:52:29,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:29,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:29,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:29,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:29,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:29,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:29,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:52:29,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:52:29,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-08-12 19:52:29,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:52:29,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:52:29,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:52:29,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-08-12 19:52:29,468 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:52:29,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348229706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:52:29,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:52:29,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-08-12 19:52:29,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491304223] [2021-08-12 19:52:29,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-08-12 19:52:29,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:52:29,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-12 19:52:29,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 19:52:29,469 INFO L87 Difference]: Start difference. First operand 1424 states and 3042 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:32,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:52:32,860 INFO L93 Difference]: Finished difference Result 4433 states and 9525 transitions. [2021-08-12 19:52:32,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-12 19:52:32,860 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-12 19:52:32,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:52:32,868 INFO L225 Difference]: With dead ends: 4433 [2021-08-12 19:52:32,869 INFO L226 Difference]: Without dead ends: 4155 [2021-08-12 19:52:32,870 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 1731.9ms TimeCoverageRelationStatistics Valid=606, Invalid=3684, Unknown=0, NotChecked=0, Total=4290 [2021-08-12 19:52:32,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2021-08-12 19:52:33,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 1776. [2021-08-12 19:52:33,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1775 states have (on average 2.150985915492958) internal successors, (3818), 1775 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:33,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 3818 transitions. [2021-08-12 19:52:33,077 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 3818 transitions. Word has length 41 [2021-08-12 19:52:33,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:52:33,077 INFO L482 AbstractCegarLoop]: Abstraction has 1776 states and 3818 transitions. [2021-08-12 19:52:33,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:33,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 3818 transitions. [2021-08-12 19:52:33,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 19:52:33,080 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:52:33,080 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:52:33,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:52:33,292 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:52:33,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:52:33,293 INFO L82 PathProgramCache]: Analyzing trace with hash -920574034, now seen corresponding path program 15 times [2021-08-12 19:52:33,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:52:33,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052538106] [2021-08-12 19:52:33,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:52:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:52:33,596 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:52:33,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:52:33,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052538106] [2021-08-12 19:52:33,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052538106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:52:33,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663727442] [2021-08-12 19:52:33,596 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 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 [2021-08-12 19:52:33,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 19:52:33,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:52:33,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 19:52:33,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:52:34,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:52:34,038 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 40 treesize of output 50 [2021-08-12 19:52:34,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:52:34,079 INFO L628 ElimStorePlain]: treesize reduction 43, result has 60.2 percent of original size [2021-08-12 19:52:34,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-08-12 19:52:34,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:37 [2021-08-12 19:52:34,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:34,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:34,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:34,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:34,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:34,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:52:34,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 63 [2021-08-12 19:52:34,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-08-12 19:52:34,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:34,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:34,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:34,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:34,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:34,489 INFO L354 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2021-08-12 19:52:34,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 38 [2021-08-12 19:52:34,494 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:52:34,553 INFO L628 ElimStorePlain]: treesize reduction 17, result has 81.9 percent of original size [2021-08-12 19:52:34,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-08-12 19:52:34,564 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:113, output treesize:36 [2021-08-12 19:52:34,666 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:52:34,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663727442] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:52:34,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:52:34,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 39 [2021-08-12 19:52:34,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127077392] [2021-08-12 19:52:34,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-08-12 19:52:34,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:52:34,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-12 19:52:34,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:52:34,667 INFO L87 Difference]: Start difference. First operand 1776 states and 3818 transitions. Second operand has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:38,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:52:38,678 INFO L93 Difference]: Finished difference Result 3958 states and 8505 transitions. [2021-08-12 19:52:38,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 19:52:38,679 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-12 19:52:38,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:52:38,685 INFO L225 Difference]: With dead ends: 3958 [2021-08-12 19:52:38,686 INFO L226 Difference]: Without dead ends: 3795 [2021-08-12 19:52:38,686 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 2390.0ms TimeCoverageRelationStatistics Valid=656, Invalid=3900, Unknown=0, NotChecked=0, Total=4556 [2021-08-12 19:52:38,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3795 states. [2021-08-12 19:52:38,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3795 to 1886. [2021-08-12 19:52:38,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 2.1527851458885943) internal successors, (4058), 1885 states have internal predecessors, (4058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:38,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 4058 transitions. [2021-08-12 19:52:38,910 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 4058 transitions. Word has length 41 [2021-08-12 19:52:38,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:52:38,910 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 4058 transitions. [2021-08-12 19:52:38,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:38,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 4058 transitions. [2021-08-12 19:52:38,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-12 19:52:38,913 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:52:38,913 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:52:39,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-08-12 19:52:39,129 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:52:39,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:52:39,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1060291469, now seen corresponding path program 16 times [2021-08-12 19:52:39,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:52:39,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295013644] [2021-08-12 19:52:39,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:52:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:52:39,178 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:52:39,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:52:39,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295013644] [2021-08-12 19:52:39,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295013644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:52:39,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851177425] [2021-08-12 19:52:39,179 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 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 [2021-08-12 19:52:39,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:52:39,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:52:39,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 19:52:39,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:52:39,283 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:52:39,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851177425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:52:39,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:52:39,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 10 [2021-08-12 19:52:39,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876247731] [2021-08-12 19:52:39,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:52:39,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:52:39,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:52:39,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:52:39,285 INFO L87 Difference]: Start difference. First operand 1886 states and 4058 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:40,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:52:40,102 INFO L93 Difference]: Finished difference Result 2438 states and 5250 transitions. [2021-08-12 19:52:40,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:52:40,103 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-12 19:52:40,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:52:40,108 INFO L225 Difference]: With dead ends: 2438 [2021-08-12 19:52:40,108 INFO L226 Difference]: Without dead ends: 2337 [2021-08-12 19:52:40,109 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:52:40,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2021-08-12 19:52:40,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 2028. [2021-08-12 19:52:40,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.163295510606808) internal successors, (4385), 2027 states have internal predecessors, (4385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:40,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 4385 transitions. [2021-08-12 19:52:40,368 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 4385 transitions. Word has length 45 [2021-08-12 19:52:40,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:52:40,368 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 4385 transitions. [2021-08-12 19:52:40,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:40,368 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 4385 transitions. [2021-08-12 19:52:40,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-12 19:52:40,371 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:52:40,371 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:52:40,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:52:40,585 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:52:40,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:52:40,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1067334948, now seen corresponding path program 17 times [2021-08-12 19:52:40,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:52:40,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218347921] [2021-08-12 19:52:40,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:52:40,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:52:40,607 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-12 19:52:40,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:52:40,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218347921] [2021-08-12 19:52:40,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218347921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:52:40,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062651713] [2021-08-12 19:52:40,608 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 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 [2021-08-12 19:52:40,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:52:40,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:52:40,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:52:40,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:52:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-08-12 19:52:40,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062651713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:52:40,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:52:40,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-12 19:52:40,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654805704] [2021-08-12 19:52:40,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 19:52:40,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:52:40,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 19:52:40,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:52:40,704 INFO L87 Difference]: Start difference. First operand 2028 states and 4385 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:41,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:52:41,536 INFO L93 Difference]: Finished difference Result 2496 states and 5403 transitions. [2021-08-12 19:52:41,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 19:52:41,537 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-12 19:52:41,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:52:41,542 INFO L225 Difference]: With dead ends: 2496 [2021-08-12 19:52:41,542 INFO L226 Difference]: Without dead ends: 2477 [2021-08-12 19:52:41,542 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:52:41,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2477 states. [2021-08-12 19:52:41,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2477 to 1590. [2021-08-12 19:52:41,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 2.1648835745752044) internal successors, (3440), 1589 states have internal predecessors, (3440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:41,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 3440 transitions. [2021-08-12 19:52:41,793 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 3440 transitions. Word has length 46 [2021-08-12 19:52:41,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:52:41,793 INFO L482 AbstractCegarLoop]: Abstraction has 1590 states and 3440 transitions. [2021-08-12 19:52:41,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:41,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 3440 transitions. [2021-08-12 19:52:41,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-12 19:52:41,796 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:52:41,796 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:52:42,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:52:42,009 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:52:42,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:52:42,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1691572838, now seen corresponding path program 18 times [2021-08-12 19:52:42,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:52:42,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955209199] [2021-08-12 19:52:42,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:52:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:52:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-12 19:52:42,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:52:42,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955209199] [2021-08-12 19:52:42,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955209199] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:52:42,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570073782] [2021-08-12 19:52:42,038 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 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 [2021-08-12 19:52:42,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:52:42,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:52:42,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:52:42,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:52:42,121 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-12 19:52:42,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570073782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:52:42,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:52:42,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-12 19:52:42,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377038132] [2021-08-12 19:52:42,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:52:42,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:52:42,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:52:42,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:52:42,122 INFO L87 Difference]: Start difference. First operand 1590 states and 3440 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:42,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:52:42,857 INFO L93 Difference]: Finished difference Result 1768 states and 3789 transitions. [2021-08-12 19:52:42,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:52:42,858 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-12 19:52:42,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:52:42,861 INFO L225 Difference]: With dead ends: 1768 [2021-08-12 19:52:42,861 INFO L226 Difference]: Without dead ends: 1749 [2021-08-12 19:52:42,861 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:52:42,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2021-08-12 19:52:43,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 1386. [2021-08-12 19:52:43,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 2.1494584837545125) internal successors, (2977), 1385 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:43,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 2977 transitions. [2021-08-12 19:52:43,068 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 2977 transitions. Word has length 46 [2021-08-12 19:52:43,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:52:43,068 INFO L482 AbstractCegarLoop]: Abstraction has 1386 states and 2977 transitions. [2021-08-12 19:52:43,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:43,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 2977 transitions. [2021-08-12 19:52:43,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-12 19:52:43,070 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:52:43,070 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:52:43,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-08-12 19:52:43,283 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:52:43,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:52:43,284 INFO L82 PathProgramCache]: Analyzing trace with hash -623804093, now seen corresponding path program 19 times [2021-08-12 19:52:43,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:52:43,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381368807] [2021-08-12 19:52:43,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:52:43,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:52:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:52:43,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:52:43,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381368807] [2021-08-12 19:52:43,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381368807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:52:43,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884055501] [2021-08-12 19:52:43,813 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 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 [2021-08-12 19:52:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:52:43,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-12 19:52:43,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:52:44,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:52:44,310 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 61 treesize of output 87 [2021-08-12 19:52:44,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:52:44,402 INFO L628 ElimStorePlain]: treesize reduction 69, result has 66.8 percent of original size [2021-08-12 19:52:44,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-08-12 19:52:44,421 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:72, output treesize:72 [2021-08-12 19:52:44,812 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-12 19:52:44,812 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 44 treesize of output 16 [2021-08-12 19:52:44,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:52:44,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:52:44,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:52:44,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:5 [2021-08-12 19:52:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:52:44,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884055501] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:52:44,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:52:44,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26] total 49 [2021-08-12 19:52:44,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024643922] [2021-08-12 19:52:44,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-08-12 19:52:44,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:52:44,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-08-12 19:52:44,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2161, Unknown=0, NotChecked=0, Total=2450 [2021-08-12 19:52:44,825 INFO L87 Difference]: Start difference. First operand 1386 states and 2977 transitions. Second operand has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:49,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:52:49,411 INFO L93 Difference]: Finished difference Result 2995 states and 6371 transitions. [2021-08-12 19:52:49,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-12 19:52:49,412 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-12 19:52:49,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:52:49,416 INFO L225 Difference]: With dead ends: 2995 [2021-08-12 19:52:49,417 INFO L226 Difference]: Without dead ends: 2897 [2021-08-12 19:52:49,417 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2594 ImplicationChecksByTransitivity, 2399.0ms TimeCoverageRelationStatistics Valid=812, Invalid=7198, Unknown=0, NotChecked=0, Total=8010 [2021-08-12 19:52:49,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2021-08-12 19:52:49,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 1478. [2021-08-12 19:52:49,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1477 states have (on average 2.159106296547055) internal successors, (3189), 1477 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:49,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 3189 transitions. [2021-08-12 19:52:49,684 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 3189 transitions. Word has length 50 [2021-08-12 19:52:49,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:52:49,684 INFO L482 AbstractCegarLoop]: Abstraction has 1478 states and 3189 transitions. [2021-08-12 19:52:49,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:49,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 3189 transitions. [2021-08-12 19:52:49,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-12 19:52:49,686 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:52:49,686 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:52:49,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:52:49,901 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:52:49,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:52:49,901 INFO L82 PathProgramCache]: Analyzing trace with hash -231269501, now seen corresponding path program 20 times [2021-08-12 19:52:49,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:52:49,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109668051] [2021-08-12 19:52:49,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:52:49,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:52:50,341 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:52:50,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:52:50,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109668051] [2021-08-12 19:52:50,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109668051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:52:50,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067236531] [2021-08-12 19:52:50,342 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 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 [2021-08-12 19:52:50,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:52:50,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:52:50,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-12 19:52:50,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:52:51,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:52:51,361 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 58 treesize of output 86 [2021-08-12 19:52:51,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:52:51,438 INFO L628 ElimStorePlain]: treesize reduction 75, result has 66.5 percent of original size [2021-08-12 19:52:51,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-08-12 19:52:51,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:76, output treesize:76 [2021-08-12 19:52:51,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:51,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:51,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:51,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:52:51,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:51,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:51,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:51,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:51,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:51,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:52:51,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:52:51,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:52:51,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-08-12 19:52:51,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:52:51,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:51,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:51,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:51,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:52:51,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:51,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:51,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:51,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:51,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:52:51,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:52:51,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 19 [2021-08-12 19:52:51,889 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:52:51,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:52:51,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:52:51,895 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:126, output treesize:5 [2021-08-12 19:52:51,903 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:52:51,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067236531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:52:51,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:52:51,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 47 [2021-08-12 19:52:51,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502379885] [2021-08-12 19:52:51,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-08-12 19:52:51,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:52:51,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-12 19:52:51,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2012, Unknown=0, NotChecked=0, Total=2256 [2021-08-12 19:52:51,904 INFO L87 Difference]: Start difference. First operand 1478 states and 3189 transitions. Second operand has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:58,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:52:58,758 INFO L93 Difference]: Finished difference Result 3237 states and 6881 transitions. [2021-08-12 19:52:58,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-08-12 19:52:58,759 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-12 19:52:58,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:52:58,763 INFO L225 Difference]: With dead ends: 3237 [2021-08-12 19:52:58,763 INFO L226 Difference]: Without dead ends: 3122 [2021-08-12 19:52:58,764 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4889 ImplicationChecksByTransitivity, 3995.9ms TimeCoverageRelationStatistics Valid=1351, Invalid=11305, Unknown=0, NotChecked=0, Total=12656 [2021-08-12 19:52:58,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3122 states. [2021-08-12 19:52:59,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3122 to 1551. [2021-08-12 19:52:59,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 1550 states have (on average 2.1580645161290324) internal successors, (3345), 1550 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:59,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 3345 transitions. [2021-08-12 19:52:59,063 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 3345 transitions. Word has length 50 [2021-08-12 19:52:59,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:52:59,063 INFO L482 AbstractCegarLoop]: Abstraction has 1551 states and 3345 transitions. [2021-08-12 19:52:59,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:52:59,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 3345 transitions. [2021-08-12 19:52:59,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-12 19:52:59,065 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:52:59,065 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:52:59,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-08-12 19:52:59,266 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:52:59,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:52:59,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1024877813, now seen corresponding path program 21 times [2021-08-12 19:52:59,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:52:59,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795641672] [2021-08-12 19:52:59,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:52:59,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:52:59,732 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:52:59,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:52:59,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795641672] [2021-08-12 19:52:59,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795641672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:52:59,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701635815] [2021-08-12 19:52:59,732 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 [2021-08-12 19:52:59,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:52:59,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:52:59,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-12 19:52:59,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:53:02,243 WARN L205 SmtUtils]: Spent 615.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-08-12 19:53:02,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:53:02,357 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 54 treesize of output 82 [2021-08-12 19:53:02,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:53:02,393 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:53:02,393 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 54 treesize of output 82 [2021-08-12 19:53:02,400 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 19:53:02,587 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 98 [2021-08-12 19:53:02,588 INFO L628 ElimStorePlain]: treesize reduction 149, result has 64.4 percent of original size [2021-08-12 19:53:02,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 2 xjuncts. [2021-08-12 19:53:02,668 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:163, output treesize:133 [2021-08-12 19:53:11,008 WARN L205 SmtUtils]: Spent 6.39 s on a formula simplification that was a NOOP. DAG size: 63 [2021-08-12 19:53:40,121 WARN L205 SmtUtils]: Spent 10.11 s on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-08-12 19:53:40,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:53:40,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:53:40,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:53:40,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:53:40,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:53:40,404 INFO L354 Elim1Store]: treesize reduction 16, result has 85.8 percent of original size [2021-08-12 19:53:40,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 45 treesize of output 115 [2021-08-12 19:53:40,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:53:40,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:53:40,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:53:40,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:53:40,681 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:53:40,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 38 treesize of output 128 [2021-08-12 19:53:41,377 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 270 [2021-08-12 19:53:41,491 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 270 [2021-08-12 19:53:41,631 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 277 [2021-08-12 19:53:42,224 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-08-12 19:53:42,449 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 72 [2021-08-12 19:53:42,450 INFO L628 ElimStorePlain]: treesize reduction 656, result has 19.0 percent of original size [2021-08-12 19:53:42,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-08-12 19:53:42,470 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 10 variables, input treesize:133, output treesize:37 [2021-08-12 19:53:42,583 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:53:42,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701635815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:53:42,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:53:42,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 50 [2021-08-12 19:53:42,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257797800] [2021-08-12 19:53:42,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-08-12 19:53:42,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:53:42,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-12 19:53:42,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2268, Unknown=3, NotChecked=0, Total=2550 [2021-08-12 19:53:42,585 INFO L87 Difference]: Start difference. First operand 1551 states and 3345 transitions. Second operand has 51 states, 51 states have (on average 1.8431372549019607) internal successors, (94), 50 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:53:59,834 WARN L205 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 133 DAG size of output: 40 [2021-08-12 19:54:08,912 WARN L205 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 138 DAG size of output: 42 [2021-08-12 19:54:29,737 WARN L205 SmtUtils]: Spent 7.58 s on a formula simplification. DAG size of input: 107 DAG size of output: 68 [2021-08-12 19:54:38,068 WARN L205 SmtUtils]: Spent 2.45 s on a formula simplification. DAG size of input: 87 DAG size of output: 61 [2021-08-12 19:54:45,848 WARN L205 SmtUtils]: Spent 2.44 s on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2021-08-12 19:54:53,230 WARN L205 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 130 DAG size of output: 51 [2021-08-12 19:55:11,526 WARN L205 SmtUtils]: Spent 12.73 s on a formula simplification. DAG size of input: 122 DAG size of output: 70 [2021-08-12 19:55:26,531 WARN L205 SmtUtils]: Spent 12.87 s on a formula simplification. DAG size of input: 120 DAG size of output: 46 [2021-08-12 19:55:35,420 WARN L205 SmtUtils]: Spent 4.51 s on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2021-08-12 19:55:56,580 WARN L205 SmtUtils]: Spent 10.62 s on a formula simplification. DAG size of input: 124 DAG size of output: 54 [2021-08-12 19:56:01,281 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 47 [2021-08-12 19:56:04,640 WARN L205 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 122 DAG size of output: 48 [2021-08-12 19:56:15,587 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 52 [2021-08-12 19:56:22,377 WARN L205 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 117 DAG size of output: 49 [2021-08-12 19:56:34,182 WARN L205 SmtUtils]: Spent 9.38 s on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2021-08-12 19:56:42,947 WARN L205 SmtUtils]: Spent 3.74 s on a formula simplification. DAG size of input: 119 DAG size of output: 46 [2021-08-12 19:56:53,313 WARN L205 SmtUtils]: Spent 6.56 s on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2021-08-12 19:57:01,200 WARN L205 SmtUtils]: Spent 2.66 s on a formula simplification. DAG size of input: 102 DAG size of output: 68 [2021-08-12 19:57:13,393 WARN L205 SmtUtils]: Spent 3.47 s on a formula simplification. DAG size of input: 121 DAG size of output: 48 [2021-08-12 19:57:30,926 WARN L205 SmtUtils]: Spent 13.40 s on a formula simplification. DAG size of input: 127 DAG size of output: 75 [2021-08-12 19:57:46,094 WARN L205 SmtUtils]: Spent 5.05 s on a formula simplification. DAG size of input: 123 DAG size of output: 69 [2021-08-12 19:58:00,984 WARN L205 SmtUtils]: Spent 4.77 s on a formula simplification. DAG size of input: 97 DAG size of output: 51 [2021-08-12 19:58:13,090 WARN L205 SmtUtils]: Spent 4.69 s on a formula simplification. DAG size of input: 137 DAG size of output: 52 [2021-08-12 19:58:21,590 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 55 [2021-08-12 19:58:38,032 WARN L205 SmtUtils]: Spent 6.66 s on a formula simplification. DAG size of input: 125 DAG size of output: 61 [2021-08-12 19:59:03,562 WARN L205 SmtUtils]: Spent 16.64 s on a formula simplification. DAG size of input: 106 DAG size of output: 60 [2021-08-12 19:59:07,827 WARN L205 SmtUtils]: Spent 3.43 s on a formula simplification. DAG size of input: 142 DAG size of output: 59 [2021-08-12 19:59:32,291 WARN L205 SmtUtils]: Spent 15.53 s on a formula simplification. DAG size of input: 126 DAG size of output: 75 [2021-08-12 19:59:53,696 WARN L205 SmtUtils]: Spent 13.25 s on a formula simplification. DAG size of input: 115 DAG size of output: 68 [2021-08-12 20:00:11,611 WARN L205 SmtUtils]: Spent 6.34 s on a formula simplification. DAG size of input: 130 DAG size of output: 73 [2021-08-12 20:00:20,159 WARN L205 SmtUtils]: Spent 2.62 s on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2021-08-12 20:00:34,085 WARN L205 SmtUtils]: Spent 8.88 s on a formula simplification. DAG size of input: 89 DAG size of output: 63 [2021-08-12 20:01:01,302 WARN L205 SmtUtils]: Spent 2.81 s on a formula simplification. DAG size of input: 136 DAG size of output: 52 Received shutdown request... [2021-08-12 20:01:20,067 WARN L222 SmtUtils]: Removed 12 from assertion stack [2021-08-12 20:01:20,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-08-12 20:01:20,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:20,268 WARN L547 AbstractCegarLoop]: Verification canceled [2021-08-12 20:01:20,270 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-12 20:01:20,271 WARN L188 ceAbstractionStarter]: Timeout [2021-08-12 20:01:20,271 INFO L202 PluginConnector]: Adding new model inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.08 08:01:20 BasicIcfg [2021-08-12 20:01:20,272 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-12 20:01:20,272 INFO L168 Benchmark]: Toolchain (without parser) took 577948.43 ms. Allocated memory was 190.8 MB in the beginning and 690.0 MB in the end (delta: 499.1 MB). Free memory was 171.8 MB in the beginning and 406.8 MB in the end (delta: -234.9 MB). Peak memory consumption was 265.8 MB. Max. memory is 8.0 GB. [2021-08-12 20:01:20,272 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 190.8 MB. Free memory is still 172.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-12 20:01:20,272 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.88 ms. Allocated memory is still 190.8 MB. Free memory was 171.7 MB in the beginning and 170.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-12 20:01:20,272 INFO L168 Benchmark]: Boogie Preprocessor took 13.99 ms. Allocated memory is still 190.8 MB. Free memory was 170.3 MB in the beginning and 169.3 MB in the end (delta: 985.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-12 20:01:20,272 INFO L168 Benchmark]: RCFGBuilder took 305.60 ms. Allocated memory is still 190.8 MB. Free memory was 169.3 MB in the beginning and 156.1 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-12 20:01:20,272 INFO L168 Benchmark]: TraceAbstraction took 577599.21 ms. Allocated memory was 190.8 MB in the beginning and 690.0 MB in the end (delta: 499.1 MB). Free memory was 155.7 MB in the beginning and 406.8 MB in the end (delta: -251.1 MB). Peak memory consumption was 250.1 MB. Max. memory is 8.0 GB. [2021-08-12 20:01:20,272 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 0.13 ms. Allocated memory is still 190.8 MB. Free memory is still 172.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 24.88 ms. Allocated memory is still 190.8 MB. Free memory was 171.7 MB in the beginning and 170.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.99 ms. Allocated memory is still 190.8 MB. Free memory was 170.3 MB in the beginning and 169.3 MB in the end (delta: 985.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 305.60 ms. Allocated memory is still 190.8 MB. Free memory was 169.3 MB in the beginning and 156.1 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 577599.21 ms. Allocated memory was 190.8 MB in the beginning and 690.0 MB in the end (delta: 499.1 MB). Free memory was 155.7 MB in the beginning and 406.8 MB in the end (delta: -251.1 MB). Peak memory consumption was 250.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1551states) and FLOYD_HOARE automaton (currently 96 states, 51 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 113 for 2198ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 41 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 577510.4ms, OverallIterations: 23, TraceHistogramMax: 4, EmptinessCheckTime: 45.2ms, AutomataDifference: 510585.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 28.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1079 SDtfs, 5321 SDslu, 10417 SDs, 0 SdLazy, 27015 SolverSat, 3266 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 61716.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1829 GetRequests, 588 SyntacticMatches, 37 SemanticMatches, 1203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39258 ImplicationChecksByTransitivity, 464729.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2028occurred in iteration=18, InterpolantAutomatonStates: 787, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2343.7ms AutomataMinimizationTime, 22 MinimizatonAttempts, 20540 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 97.6ms SsaConstructionTime, 393.3ms SatisfiabilityAnalysisTime, 58948.8ms InterpolantComputationTime, 1672 NumberOfCodeBlocks, 1672 NumberOfCodeBlocksAsserted, 78 NumberOfCheckSat, 1628 ConstructedInterpolants, 268 QuantifiedInterpolants, 27388 SizeOfPredicates, 223 NumberOfNonLiveVariables, 1741 ConjunctsInSsa, 544 ConjunctsInUnsatCore, 44 InterpolantComputations, 2 PerfectInterpolantSequences, 260/1315 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