/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-04 19:20:22,496 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-04 19:20:22,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-04 19:20:22,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-04 19:20:22,583 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-04-04 19:20:22,604 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-04 19:20:22,605 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-04 19:20:22,605 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-04-04 19:20:22,605 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-04-04 19:20:22,606 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-04 19:20:22,606 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-04 19:20:22,606 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-04 19:20:22,606 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-04 19:20:22,606 INFO L138 SettingsManager]: * Use SBE=true [2022-04-04 19:20:22,607 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-04 19:20:22,607 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-04 19:20:22,607 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-04 19:20:22,607 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-04 19:20:22,607 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-04 19:20:22,607 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-04 19:20:22,607 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-04 19:20:22,608 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-04 19:20:22,609 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-04 19:20:22,609 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-04 19:20:22,609 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-04 19:20:22,609 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-04 19:20:22,609 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-04 19:20:22,609 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-04 19:20:22,609 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-04 19:20:22,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-04 19:20:22,609 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-04 19:20:22,609 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-04 19:20:22,610 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-04 19:20:22,610 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-04 19:20:22,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-04 19:20:22,610 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-04-04 19:20:22,610 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-04-04 19:20:22,610 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-04 19:20:22,610 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-04 19:20:22,794 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-04 19:20:22,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-04 19:20:22,821 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-04 19:20:22,821 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-04 19:20:22,822 INFO L275 PluginConnector]: CDTParser initialized [2022-04-04 19:20:22,823 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2022-04-04 19:20:22,872 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee772ae1f/d04f4fed6d9a4a09b11feb71906c3fb5/FLAG82c306089 [2022-04-04 19:20:23,270 INFO L306 CDTParser]: Found 1 translation units. [2022-04-04 19:20:23,270 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2022-04-04 19:20:23,277 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee772ae1f/d04f4fed6d9a4a09b11feb71906c3fb5/FLAG82c306089 [2022-04-04 19:20:23,295 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee772ae1f/d04f4fed6d9a4a09b11feb71906c3fb5 [2022-04-04 19:20:23,298 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-04 19:20:23,299 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-04 19:20:23,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-04 19:20:23,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-04 19:20:23,305 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-04 19:20:23,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.04 07:20:23" (1/1) ... [2022-04-04 19:20:23,307 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72146241 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 07:20:23, skipping insertion in model container [2022-04-04 19:20:23,307 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.04 07:20:23" (1/1) ... [2022-04-04 19:20:23,313 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-04 19:20:23,331 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-04 19:20:23,497 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i[919,932] [2022-04-04 19:20:23,513 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-04 19:20:23,519 INFO L203 MainTranslator]: Completed pre-run [2022-04-04 19:20:23,529 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i[919,932] [2022-04-04 19:20:23,541 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-04 19:20:23,551 INFO L208 MainTranslator]: Completed translation [2022-04-04 19:20:23,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 07:20:23 WrapperNode [2022-04-04 19:20:23,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-04 19:20:23,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-04 19:20:23,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-04 19:20:23,552 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-04 19:20:23,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 07:20:23" (1/1) ... [2022-04-04 19:20:23,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 07:20:23" (1/1) ... [2022-04-04 19:20:23,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 07:20:23" (1/1) ... [2022-04-04 19:20:23,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 07:20:23" (1/1) ... [2022-04-04 19:20:23,575 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 07:20:23" (1/1) ... [2022-04-04 19:20:23,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 07:20:23" (1/1) ... [2022-04-04 19:20:23,580 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 07:20:23" (1/1) ... [2022-04-04 19:20:23,584 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-04 19:20:23,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-04 19:20:23,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-04 19:20:23,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-04 19:20:23,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 07:20:23" (1/1) ... [2022-04-04 19:20:23,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-04 19:20:23,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 19:20:23,608 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-04 19:20:23,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-04 19:20:23,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-04 19:20:23,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-04 19:20:23,638 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-04 19:20:23,638 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-04 19:20:23,639 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-04 19:20:23,639 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-04 19:20:23,639 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-04 19:20:23,639 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-04 19:20:23,639 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-04 19:20:23,639 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-04 19:20:23,639 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-04 19:20:23,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-04 19:20:23,639 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-04 19:20:23,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-04 19:20:23,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-04 19:20:23,640 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-04 19:20:23,640 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-04 19:20:23,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-04 19:20:23,640 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-04 19:20:23,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-04 19:20:23,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-04 19:20:23,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-04 19:20:23,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-04 19:20:23,704 INFO L234 CfgBuilder]: Building ICFG [2022-04-04 19:20:23,705 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-04 19:20:23,813 INFO L275 CfgBuilder]: Performing block encoding [2022-04-04 19:20:23,817 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-04 19:20:23,817 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-04 19:20:23,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.04 07:20:23 BoogieIcfgContainer [2022-04-04 19:20:23,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-04 19:20:23,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-04 19:20:23,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-04 19:20:23,822 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-04 19:20:23,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.04 07:20:23" (1/3) ... [2022-04-04 19:20:23,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53cbe20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.04 07:20:23, skipping insertion in model container [2022-04-04 19:20:23,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 07:20:23" (2/3) ... [2022-04-04 19:20:23,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53cbe20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.04 07:20:23, skipping insertion in model container [2022-04-04 19:20:23,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.04 07:20:23" (3/3) ... [2022-04-04 19:20:23,824 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_2.i [2022-04-04 19:20:23,827 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-04 19:20:23,827 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-04 19:20:23,859 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-04 19:20:23,865 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-04 19:20:23,866 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-04 19:20:23,878 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-04 19:20:23,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-04 19:20:23,881 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 19:20:23,882 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 19:20:23,882 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 19:20:23,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 19:20:23,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1210672905, now seen corresponding path program 1 times [2022-04-04 19:20:23,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 19:20:23,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122887537] [2022-04-04 19:20:23,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 19:20:23,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 19:20:24,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:24,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-04 19:20:24,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:24,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 19:20:24,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 19:20:24,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122887537] [2022-04-04 19:20:24,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122887537] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-04 19:20:24,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-04 19:20:24,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-04 19:20:24,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116524504] [2022-04-04 19:20:24,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-04 19:20:24,108 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-04 19:20:24,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 19:20:24,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-04 19:20:24,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-04 19:20:24,138 INFO L87 Difference]: Start difference. First operand has 30 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-04 19:20:24,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 19:20:24,259 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2022-04-04 19:20:24,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-04 19:20:24,261 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-04-04 19:20:24,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 19:20:24,266 INFO L225 Difference]: With dead ends: 62 [2022-04-04 19:20:24,266 INFO L226 Difference]: Without dead ends: 33 [2022-04-04 19:20:24,269 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-04 19:20:24,273 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 28 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-04 19:20:24,274 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 33 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-04 19:20:24,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-04 19:20:24,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2022-04-04 19:20:24,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-04 19:20:24,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-04-04 19:20:24,307 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 13 [2022-04-04 19:20:24,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 19:20:24,307 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-04-04 19:20:24,308 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-04 19:20:24,308 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-04-04 19:20:24,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-04 19:20:24,309 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 19:20:24,309 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 19:20:24,310 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-04 19:20:24,310 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 19:20:24,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 19:20:24,312 INFO L85 PathProgramCache]: Analyzing trace with hash 778735204, now seen corresponding path program 1 times [2022-04-04 19:20:24,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 19:20:24,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268181999] [2022-04-04 19:20:24,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 19:20:24,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 19:20:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:24,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-04 19:20:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:24,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-04 19:20:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 19:20:24,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 19:20:24,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268181999] [2022-04-04 19:20:24,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268181999] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-04 19:20:24,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100974180] [2022-04-04 19:20:24,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 19:20:24,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 19:20:24,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 19:20:24,463 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-04 19:20:24,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-04 19:20:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:24,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-04 19:20:24,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 19:20:24,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-04 19:20:24,782 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-04-04 19:20:24,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 22 [2022-04-04 19:20:24,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 19:20:24,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-04 19:20:25,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 45 treesize of output 41 [2022-04-04 19:20:25,127 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-04 19:20:25,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 88 [2022-04-04 19:20:25,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-04 19:20:25,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 4 [2022-04-04 19:20:25,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-04 19:20:25,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-04 19:20:25,233 INFO L356 Elim1Store]: treesize reduction 28, result has 50.0 percent of original size [2022-04-04 19:20:25,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 47 [2022-04-04 19:20:25,406 INFO L356 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2022-04-04 19:20:25,406 INFO L390 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 102 treesize of output 85 [2022-04-04 19:20:25,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 19:20:25,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100974180] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-04 19:20:25,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-04 19:20:25,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 12] total 20 [2022-04-04 19:20:25,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117792739] [2022-04-04 19:20:25,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-04 19:20:25,667 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-04 19:20:25,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 19:20:25,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-04 19:20:25,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-04-04 19:20:25,671 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-04 19:20:25,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 19:20:25,981 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2022-04-04 19:20:25,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-04 19:20:25,982 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2022-04-04 19:20:25,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 19:20:25,982 INFO L225 Difference]: With dead ends: 52 [2022-04-04 19:20:25,982 INFO L226 Difference]: Without dead ends: 41 [2022-04-04 19:20:25,983 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-04-04 19:20:25,984 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-04 19:20:25,984 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 69 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 264 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2022-04-04 19:20:25,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-04 19:20:25,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2022-04-04 19:20:25,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-04 19:20:25,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-04-04 19:20:25,989 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2022-04-04 19:20:25,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 19:20:25,989 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-04-04 19:20:25,990 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-04 19:20:25,990 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-04-04 19:20:25,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-04 19:20:25,991 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 19:20:25,991 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 19:20:26,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-04 19:20:26,201 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 19:20:26,202 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 19:20:26,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 19:20:26,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1692936895, now seen corresponding path program 2 times [2022-04-04 19:20:26,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 19:20:26,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400632727] [2022-04-04 19:20:26,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 19:20:26,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 19:20:26,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:26,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-04 19:20:26,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:26,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-04 19:20:26,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:26,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-04 19:20:26,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:26,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-04 19:20:26,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 19:20:26,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400632727] [2022-04-04 19:20:26,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400632727] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-04 19:20:26,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649277325] [2022-04-04 19:20:26,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-04 19:20:26,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 19:20:26,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 19:20:26,302 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-04 19:20:26,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-04 19:20:26,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-04 19:20:26,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-04 19:20:26,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-04 19:20:26,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 19:20:26,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-04 19:20:26,615 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-04 19:20:26,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-04 19:20:26,936 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-04-04 19:20:26,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 22 [2022-04-04 19:20:27,055 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-04 19:20:27,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-04 19:20:30,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649277325] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-04 19:20:30,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-04 19:20:30,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16] total 19 [2022-04-04 19:20:30,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535674427] [2022-04-04 19:20:30,567 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-04 19:20:30,567 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-04 19:20:30,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 19:20:30,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-04 19:20:30,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=470, Unknown=2, NotChecked=0, Total=552 [2022-04-04 19:20:30,568 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 19 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-04 19:20:31,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 19:20:31,065 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2022-04-04 19:20:31,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-04 19:20:31,066 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2022-04-04 19:20:31,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 19:20:31,067 INFO L225 Difference]: With dead ends: 66 [2022-04-04 19:20:31,067 INFO L226 Difference]: Without dead ends: 55 [2022-04-04 19:20:31,068 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=257, Invalid=1547, Unknown=2, NotChecked=0, Total=1806 [2022-04-04 19:20:31,069 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 42 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-04 19:20:31,069 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 71 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 165 Invalid, 0 Unknown, 91 Unchecked, 0.1s Time] [2022-04-04 19:20:31,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-04 19:20:31,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2022-04-04 19:20:31,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-04 19:20:31,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-04-04 19:20:31,076 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 29 [2022-04-04 19:20:31,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 19:20:31,077 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-04-04 19:20:31,077 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-04 19:20:31,077 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-04-04 19:20:31,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-04 19:20:31,078 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 19:20:31,078 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 19:20:31,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-04 19:20:31,296 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-04 19:20:31,297 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 19:20:31,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 19:20:31,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1452373648, now seen corresponding path program 1 times [2022-04-04 19:20:31,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 19:20:31,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909061694] [2022-04-04 19:20:31,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 19:20:31,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 19:20:31,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:31,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-04 19:20:31,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:31,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-04 19:20:31,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:31,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-04 19:20:31,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:31,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-04 19:20:31,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:31,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-04 19:20:31,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:31,416 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-04 19:20:31,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 19:20:31,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909061694] [2022-04-04 19:20:31,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909061694] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-04 19:20:31,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645192477] [2022-04-04 19:20:31,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 19:20:31,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 19:20:31,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 19:20:31,425 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-04 19:20:31,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-04 19:20:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:31,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-04 19:20:31,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 19:20:31,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 58 treesize of output 53 [2022-04-04 19:20:31,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 95 [2022-04-04 19:20:34,425 INFO L356 Elim1Store]: treesize reduction 113, result has 28.9 percent of original size [2022-04-04 19:20:34,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 94 [2022-04-04 19:20:45,478 INFO L356 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-04-04 19:20:45,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 48 treesize of output 21 [2022-04-04 19:20:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-04 19:20:45,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-04 19:20:49,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645192477] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-04 19:20:49,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-04 19:20:49,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 19] total 22 [2022-04-04 19:20:49,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829090130] [2022-04-04 19:20:49,933 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-04 19:20:49,934 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-04 19:20:49,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 19:20:49,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-04 19:20:49,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=640, Unknown=3, NotChecked=0, Total=756 [2022-04-04 19:20:49,935 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 22 states, 20 states have (on average 2.4) internal successors, (48), 18 states have internal predecessors, (48), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-04-04 19:20:52,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 19:20:52,356 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2022-04-04 19:20:52,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-04 19:20:52,357 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.4) internal successors, (48), 18 states have internal predecessors, (48), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 45 [2022-04-04 19:20:52,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 19:20:52,358 INFO L225 Difference]: With dead ends: 79 [2022-04-04 19:20:52,358 INFO L226 Difference]: Without dead ends: 62 [2022-04-04 19:20:52,359 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=221, Invalid=1415, Unknown=4, NotChecked=0, Total=1640 [2022-04-04 19:20:52,359 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 35 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-04 19:20:52,359 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 161 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 157 Invalid, 0 Unknown, 153 Unchecked, 0.1s Time] [2022-04-04 19:20:52,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-04-04 19:20:52,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2022-04-04 19:20:52,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-04 19:20:52,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-04-04 19:20:52,369 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 45 [2022-04-04 19:20:52,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 19:20:52,369 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-04-04 19:20:52,369 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.4) internal successors, (48), 18 states have internal predecessors, (48), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-04-04 19:20:52,369 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-04-04 19:20:52,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-04 19:20:52,370 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 19:20:52,370 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 19:20:52,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-04 19:20:52,583 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 19:20:52,584 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 19:20:52,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 19:20:52,584 INFO L85 PathProgramCache]: Analyzing trace with hash 345870625, now seen corresponding path program 2 times [2022-04-04 19:20:52,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 19:20:52,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199731261] [2022-04-04 19:20:52,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 19:20:52,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 19:20:52,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:52,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-04 19:20:52,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:52,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-04 19:20:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:52,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-04 19:20:52,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:52,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-04 19:20:52,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:52,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-04 19:20:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:52,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-04 19:20:52,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:52,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-04 19:20:52,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:20:52,745 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-04 19:20:52,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 19:20:52,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199731261] [2022-04-04 19:20:52,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199731261] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-04 19:20:52,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74810264] [2022-04-04 19:20:52,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-04 19:20:52,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 19:20:52,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 19:20:52,748 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-04 19:20:52,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-04 19:20:52,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-04 19:20:52,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-04 19:20:52,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-04 19:20:52,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 19:20:52,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 58 treesize of output 53 [2022-04-04 19:20:52,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 95 [2022-04-04 19:20:55,180 INFO L356 Elim1Store]: treesize reduction 39, result has 39.1 percent of original size [2022-04-04 19:20:55,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 57 [2022-04-04 19:21:00,437 INFO L356 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-04-04 19:21:00,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 48 treesize of output 21 [2022-04-04 19:21:00,557 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 38 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-04 19:21:00,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-04 19:21:07,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74810264] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-04 19:21:07,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-04 19:21:07,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 22] total 25 [2022-04-04 19:21:07,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491504873] [2022-04-04 19:21:07,339 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-04 19:21:07,339 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-04 19:21:07,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 19:21:07,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-04 19:21:07,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=843, Unknown=10, NotChecked=0, Total=992 [2022-04-04 19:21:07,340 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 25 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-04-04 19:21:10,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 19:21:10,169 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2022-04-04 19:21:10,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-04 19:21:10,169 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 61 [2022-04-04 19:21:10,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 19:21:10,171 INFO L225 Difference]: With dead ends: 111 [2022-04-04 19:21:10,172 INFO L226 Difference]: Without dead ends: 86 [2022-04-04 19:21:10,172 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=267, Invalid=1885, Unknown=10, NotChecked=0, Total=2162 [2022-04-04 19:21:10,173 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 67 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-04 19:21:10,173 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 139 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 269 Invalid, 0 Unknown, 118 Unchecked, 0.2s Time] [2022-04-04 19:21:10,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-04 19:21:10,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2022-04-04 19:21:10,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 56 states have internal predecessors, (57), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-04 19:21:10,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2022-04-04 19:21:10,186 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 61 [2022-04-04 19:21:10,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 19:21:10,187 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2022-04-04 19:21:10,187 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-04-04 19:21:10,187 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2022-04-04 19:21:10,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-04 19:21:10,188 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 19:21:10,188 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 19:21:10,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-04 19:21:10,395 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 19:21:10,395 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 19:21:10,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 19:21:10,396 INFO L85 PathProgramCache]: Analyzing trace with hash 648561106, now seen corresponding path program 3 times [2022-04-04 19:21:10,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 19:21:10,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085525323] [2022-04-04 19:21:10,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 19:21:10,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 19:21:10,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:10,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-04 19:21:10,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:10,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-04 19:21:10,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:10,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-04 19:21:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:10,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-04 19:21:10,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:10,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-04 19:21:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:10,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-04 19:21:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:10,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-04 19:21:10,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:10,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-04 19:21:10,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:10,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-04 19:21:10,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:10,505 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-04-04 19:21:10,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 19:21:10,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085525323] [2022-04-04 19:21:10,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085525323] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-04 19:21:10,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976937204] [2022-04-04 19:21:10,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-04 19:21:10,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 19:21:10,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 19:21:10,506 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-04 19:21:10,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-04 19:21:10,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-04-04 19:21:10,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-04 19:21:10,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-04 19:21:10,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 19:21:11,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 58 treesize of output 53 [2022-04-04 19:21:11,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-04 19:21:11,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 95 [2022-04-04 19:21:11,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-04 19:21:11,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 30 [2022-04-04 19:21:11,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 85 treesize of output 76 [2022-04-04 19:21:11,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-04 19:21:11,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-04 19:21:11,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-04 19:21:11,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 124 [2022-04-04 19:21:11,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-04 19:21:11,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-04 19:21:11,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-04 19:21:11,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-04-04 19:21:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 45 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-04-04 19:21:11,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-04 19:21:14,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 45 treesize of output 41 [2022-04-04 19:21:14,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-04 19:21:14,296 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-04 19:21:14,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 88 [2022-04-04 19:21:14,342 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-04-04 19:21:14,342 INFO L390 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 [2022-04-04 19:21:14,650 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-04 19:21:14,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976937204] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-04 19:21:14,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-04 19:21:14,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17, 21] total 43 [2022-04-04 19:21:14,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083083836] [2022-04-04 19:21:14,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-04 19:21:14,651 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-04 19:21:14,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 19:21:14,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-04 19:21:14,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1542, Unknown=0, NotChecked=0, Total=1806 [2022-04-04 19:21:14,652 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 38 states have internal predecessors, (88), 21 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-04-04 19:21:20,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 19:21:20,768 INFO L93 Difference]: Finished difference Result 221 states and 253 transitions. [2022-04-04 19:21:20,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-04 19:21:20,768 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 38 states have internal predecessors, (88), 21 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) Word has length 77 [2022-04-04 19:21:20,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 19:21:20,770 INFO L225 Difference]: With dead ends: 221 [2022-04-04 19:21:20,770 INFO L226 Difference]: Without dead ends: 188 [2022-04-04 19:21:20,772 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 145 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1169, Invalid=6487, Unknown=0, NotChecked=0, Total=7656 [2022-04-04 19:21:20,773 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 361 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 2183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-04 19:21:20,773 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 126 Invalid, 2183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 1600 Invalid, 0 Unknown, 135 Unchecked, 2.2s Time] [2022-04-04 19:21:20,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-04-04 19:21:20,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 123. [2022-04-04 19:21:20,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 90 states have (on average 1.0777777777777777) internal successors, (97), 92 states have internal predecessors, (97), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-04 19:21:20,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 138 transitions. [2022-04-04 19:21:20,796 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 138 transitions. Word has length 77 [2022-04-04 19:21:20,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 19:21:20,796 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 138 transitions. [2022-04-04 19:21:20,796 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 38 states have internal predecessors, (88), 21 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-04-04 19:21:20,797 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 138 transitions. [2022-04-04 19:21:20,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-04 19:21:20,798 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 19:21:20,798 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 19:21:20,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-04 19:21:21,005 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 19:21:21,005 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 19:21:21,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 19:21:21,006 INFO L85 PathProgramCache]: Analyzing trace with hash 616668035, now seen corresponding path program 4 times [2022-04-04 19:21:21,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 19:21:21,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080028684] [2022-04-04 19:21:21,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 19:21:21,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 19:21:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:21,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-04 19:21:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:21,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-04 19:21:21,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:21,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-04 19:21:21,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:21,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-04 19:21:21,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:21,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-04 19:21:21,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:21,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-04 19:21:21,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:21,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-04 19:21:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:21,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-04 19:21:21,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:21,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-04 19:21:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:21,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-04 19:21:21,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:21,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-04-04 19:21:21,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:21,171 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 8 proven. 66 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-04-04 19:21:21,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 19:21:21,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080028684] [2022-04-04 19:21:21,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080028684] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-04 19:21:21,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551386431] [2022-04-04 19:21:21,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-04 19:21:21,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 19:21:21,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 19:21:21,183 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-04 19:21:21,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-04 19:21:21,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-04 19:21:21,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-04 19:21:21,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-04 19:21:21,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 19:21:21,923 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-04-04 19:21:21,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-04 19:21:22,146 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 8 proven. 66 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-04-04 19:21:22,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551386431] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-04 19:21:22,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-04 19:21:22,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-04-04 19:21:22,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019563334] [2022-04-04 19:21:22,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-04 19:21:22,147 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-04 19:21:22,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 19:21:22,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-04 19:21:22,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-04-04 19:21:22,148 INFO L87 Difference]: Start difference. First operand 123 states and 138 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 14 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-04-04 19:21:23,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 19:21:23,678 INFO L93 Difference]: Finished difference Result 211 states and 242 transitions. [2022-04-04 19:21:23,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-04 19:21:23,679 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 14 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 93 [2022-04-04 19:21:23,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 19:21:23,680 INFO L225 Difference]: With dead ends: 211 [2022-04-04 19:21:23,680 INFO L226 Difference]: Without dead ends: 159 [2022-04-04 19:21:23,681 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=299, Invalid=693, Unknown=0, NotChecked=0, Total=992 [2022-04-04 19:21:23,681 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 203 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-04 19:21:23,681 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 79 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-04 19:21:23,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-04-04 19:21:23,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 116. [2022-04-04 19:21:23,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 86 states have internal predecessors, (87), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-04 19:21:23,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2022-04-04 19:21:23,699 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 93 [2022-04-04 19:21:23,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 19:21:23,699 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2022-04-04 19:21:23,700 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 14 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-04-04 19:21:23,700 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2022-04-04 19:21:23,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-04-04 19:21:23,701 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 19:21:23,701 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 19:21:23,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-04 19:21:23,907 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 19:21:23,908 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 19:21:23,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 19:21:23,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1102839803, now seen corresponding path program 5 times [2022-04-04 19:21:23,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 19:21:23,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798909258] [2022-04-04 19:21:23,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 19:21:23,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 19:21:23,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:24,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-04 19:21:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:24,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-04 19:21:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:24,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-04 19:21:24,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:24,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-04 19:21:24,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:24,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-04 19:21:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:24,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-04 19:21:24,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:24,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-04 19:21:24,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:24,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-04 19:21:24,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:24,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-04 19:21:24,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:24,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-04 19:21:24,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:24,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-04 19:21:24,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:24,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-04 19:21:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:24,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-04 19:21:24,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:24,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-04 19:21:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:24,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-04 19:21:24,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:24,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-04 19:21:24,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:24,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-04-04 19:21:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:24,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-04-04 19:21:24,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:21:24,203 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 6 proven. 378 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2022-04-04 19:21:24,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 19:21:24,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798909258] [2022-04-04 19:21:24,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798909258] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-04 19:21:24,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010416466] [2022-04-04 19:21:24,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-04 19:21:24,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 19:21:24,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 19:21:24,205 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-04 19:21:24,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-04 19:22:00,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-04-04 19:22:00,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-04 19:22:00,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-04 19:22:00,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 19:22:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-04-04 19:22:01,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-04 19:22:01,610 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 6 proven. 378 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2022-04-04 19:22:01,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010416466] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-04 19:22:01,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-04 19:22:01,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-04-04 19:22:01,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287585985] [2022-04-04 19:22:01,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-04 19:22:01,611 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-04 19:22:01,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 19:22:01,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-04 19:22:01,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=802, Unknown=0, NotChecked=0, Total=1122 [2022-04-04 19:22:01,612 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 30 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-04-04 19:22:17,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 19:22:17,786 INFO L93 Difference]: Finished difference Result 320 states and 388 transitions. [2022-04-04 19:22:17,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-04 19:22:17,787 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 30 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) Word has length 149 [2022-04-04 19:22:17,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 19:22:17,789 INFO L225 Difference]: With dead ends: 320 [2022-04-04 19:22:17,789 INFO L226 Difference]: Without dead ends: 287 [2022-04-04 19:22:17,790 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 317 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=1115, Invalid=2917, Unknown=0, NotChecked=0, Total=4032 [2022-04-04 19:22:17,790 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 731 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2807 mSolverCounterSat, 760 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 731 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 3567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 760 IncrementalHoareTripleChecker+Valid, 2807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-04 19:22:17,790 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [731 Valid, 138 Invalid, 3567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [760 Valid, 2807 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-04-04 19:22:17,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-04-04 19:22:17,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 180. [2022-04-04 19:22:17,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 134 states have internal predecessors, (135), 36 states have call successors, (36), 11 states have call predecessors, (36), 10 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2022-04-04 19:22:17,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 206 transitions. [2022-04-04 19:22:17,823 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 206 transitions. Word has length 149 [2022-04-04 19:22:17,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 19:22:17,823 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 206 transitions. [2022-04-04 19:22:17,823 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 30 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-04-04 19:22:17,824 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 206 transitions. [2022-04-04 19:22:17,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-04-04 19:22:17,826 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 19:22:17,826 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 19:22:17,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-04 19:22:18,035 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 19:22:18,035 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 19:22:18,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 19:22:18,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1415471691, now seen corresponding path program 6 times [2022-04-04 19:22:18,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 19:22:18,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374156113] [2022-04-04 19:22:18,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 19:22:18,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 19:22:18,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-04 19:22:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-04 19:22:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-04 19:22:18,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-04 19:22:18,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-04 19:22:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-04 19:22:18,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-04 19:22:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-04 19:22:18,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-04 19:22:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-04 19:22:18,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-04 19:22:18,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-04 19:22:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-04 19:22:18,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-04 19:22:18,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-04 19:22:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-04 19:22:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-04 19:22:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-04-04 19:22:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-04-04 19:22:18,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-04 19:22:18,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-04-04 19:22:18,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-04-04 19:22:18,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-04-04 19:22:18,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-04-04 19:22:18,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-04-04 19:22:18,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-04-04 19:22:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-04-04 19:22:18,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2022-04-04 19:22:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-04-04 19:22:18,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2022-04-04 19:22:18,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2022-04-04 19:22:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2022-04-04 19:22:18,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2022-04-04 19:22:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2022-04-04 19:22:18,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 19:22:18,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3546 backedges. 6 proven. 1770 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2022-04-04 19:22:18,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 19:22:18,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374156113] [2022-04-04 19:22:18,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374156113] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-04 19:22:18,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136866504] [2022-04-04 19:22:18,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-04 19:22:18,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 19:22:18,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 19:22:18,791 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-04 19:22:18,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process