/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/nla-digbench-scaling/dijkstra-u_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-19 23:55:59,271 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 23:55:59,273 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 23:55:59,305 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 23:55:59,360 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 [2022-03-19 23:55:59,391 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 23:55:59,392 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 23:55:59,392 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-19 23:55:59,392 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-19 23:55:59,392 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 23:55:59,393 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 23:55:59,393 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 23:55:59,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 23:55:59,393 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 23:55:59,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 23:55:59,393 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 23:55:59,394 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 23:55:59,394 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 23:55:59,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 23:55:59,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 23:55:59,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 23:55:59,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 23:55:59,394 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 23:55:59,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 23:55:59,395 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 23:55:59,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 23:55:59,397 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 23:55:59,397 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 23:55:59,397 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 23:55:59,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:55:59,398 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 23:55:59,398 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 23:55:59,398 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 23:55:59,399 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 23:55:59,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 23:55:59,399 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-19 23:55:59,399 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-19 23:55:59,399 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 23:55:59,399 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 23:55:59,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 23:55:59,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 23:55:59,664 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 23:55:59,665 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 23:55:59,665 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 23:55:59,666 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound100.c [2022-03-19 23:55:59,725 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea1e3d6a7/4df5f1a1c7e246bc9511f4cdceae1598/FLAGd3333ea4d [2022-03-19 23:56:00,121 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 23:56:00,121 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound100.c [2022-03-19 23:56:00,128 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea1e3d6a7/4df5f1a1c7e246bc9511f4cdceae1598/FLAGd3333ea4d [2022-03-19 23:56:00,522 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea1e3d6a7/4df5f1a1c7e246bc9511f4cdceae1598 [2022-03-19 23:56:00,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 23:56:00,526 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 23:56:00,527 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 23:56:00,528 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 23:56:00,536 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 23:56:00,537 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:56:00" (1/1) ... [2022-03-19 23:56:00,538 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76a573ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:56:00, skipping insertion in model container [2022-03-19 23:56:00,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:56:00" (1/1) ... [2022-03-19 23:56:00,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 23:56:00,564 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 23:56:00,677 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound100.c[525,538] [2022-03-19 23:56:00,720 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:56:00,730 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 23:56:00,738 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound100.c[525,538] [2022-03-19 23:56:00,755 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:56:00,766 INFO L208 MainTranslator]: Completed translation [2022-03-19 23:56:00,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:56:00 WrapperNode [2022-03-19 23:56:00,766 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 23:56:00,767 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 23:56:00,767 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 23:56:00,767 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 23:56:00,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:56:00" (1/1) ... [2022-03-19 23:56:00,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:56:00" (1/1) ... [2022-03-19 23:56:00,784 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:56:00" (1/1) ... [2022-03-19 23:56:00,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:56:00" (1/1) ... [2022-03-19 23:56:00,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:56:00" (1/1) ... [2022-03-19 23:56:00,801 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:56:00" (1/1) ... [2022-03-19 23:56:00,802 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:56:00" (1/1) ... [2022-03-19 23:56:00,804 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 23:56:00,805 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 23:56:00,805 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 23:56:00,805 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 23:56:00,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:56:00" (1/1) ... [2022-03-19 23:56:00,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:56:00,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:56:00,839 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) [2022-03-19 23:56:00,841 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 [2022-03-19 23:56:00,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 23:56:00,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 23:56:00,871 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 23:56:00,871 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 23:56:00,871 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 23:56:00,872 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 23:56:00,872 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 23:56:00,872 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 23:56:00,872 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 23:56:00,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 23:56:00,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-19 23:56:00,872 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 23:56:00,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 23:56:00,873 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 23:56:00,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 23:56:00,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 23:56:00,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 23:56:00,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 23:56:00,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 23:56:00,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 23:56:00,921 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 23:56:00,924 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 23:56:01,139 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 23:56:01,145 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 23:56:01,145 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 23:56:01,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:56:01 BoogieIcfgContainer [2022-03-19 23:56:01,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 23:56:01,148 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 23:56:01,148 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 23:56:01,170 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 23:56:01,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 11:56:00" (1/3) ... [2022-03-19 23:56:01,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386d914c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:56:01, skipping insertion in model container [2022-03-19 23:56:01,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:56:00" (2/3) ... [2022-03-19 23:56:01,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386d914c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:56:01, skipping insertion in model container [2022-03-19 23:56:01,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:56:01" (3/3) ... [2022-03-19 23:56:01,172 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound100.c [2022-03-19 23:56:01,176 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 23:56:01,177 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 23:56:01,258 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 23:56:01,264 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 [2022-03-19 23:56:01,264 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 23:56:01,294 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 23:56:01,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-19 23:56:01,298 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:56:01,299 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:56:01,299 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:56:01,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:56:01,309 INFO L85 PathProgramCache]: Analyzing trace with hash -2024343623, now seen corresponding path program 1 times [2022-03-19 23:56:01,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:56:01,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554438617] [2022-03-19 23:56:01,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:56:01,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:56:01,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:01,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:56:01,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:01,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 23:56:01,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:01,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:56:01,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:56:01,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554438617] [2022-03-19 23:56:01,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554438617] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:56:01,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:56:01,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 23:56:01,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112402638] [2022-03-19 23:56:01,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:56:01,548 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 23:56:01,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:56:01,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 23:56:01,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 23:56:01,582 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 23:56:03,665 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:56:05,969 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:56:05,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:56:05,990 INFO L93 Difference]: Finished difference Result 70 states and 111 transitions. [2022-03-19 23:56:05,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 23:56:05,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-19 23:56:05,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:56:06,001 INFO L225 Difference]: With dead ends: 70 [2022-03-19 23:56:06,001 INFO L226 Difference]: Without dead ends: 35 [2022-03-19 23:56:06,007 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 23:56:06,010 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 11 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:56:06,010 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 53 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 24 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2022-03-19 23:56:06,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-19 23:56:06,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-03-19 23:56:06,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 23:56:06,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2022-03-19 23:56:06,047 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 18 [2022-03-19 23:56:06,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:56:06,048 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2022-03-19 23:56:06,048 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 23:56:06,048 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2022-03-19 23:56:06,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-19 23:56:06,049 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:56:06,049 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] [2022-03-19 23:56:06,049 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 23:56:06,050 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:56:06,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:56:06,050 INFO L85 PathProgramCache]: Analyzing trace with hash -96361696, now seen corresponding path program 1 times [2022-03-19 23:56:06,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:56:06,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517597204] [2022-03-19 23:56:06,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:56:06,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:56:06,064 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:56:06,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1697773058] [2022-03-19 23:56:06,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:56:06,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:56:06,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:56:06,070 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) [2022-03-19 23:56:06,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 23:56:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:06,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 23:56:06,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:56:06,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:56:06,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 23:56:06,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:56:06,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517597204] [2022-03-19 23:56:06,228 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:56:06,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697773058] [2022-03-19 23:56:06,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697773058] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:56:06,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:56:06,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 23:56:06,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287949202] [2022-03-19 23:56:06,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:56:06,230 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 23:56:06,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:56:06,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 23:56:06,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 23:56:06,231 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 23:56:06,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:56:06,247 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2022-03-19 23:56:06,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 23:56:06,248 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-19 23:56:06,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:56:06,249 INFO L225 Difference]: With dead ends: 55 [2022-03-19 23:56:06,249 INFO L226 Difference]: Without dead ends: 36 [2022-03-19 23:56:06,249 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 23:56:06,250 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:56:06,251 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:56:06,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-19 23:56:06,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-03-19 23:56:06,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 23:56:06,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2022-03-19 23:56:06,259 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 20 [2022-03-19 23:56:06,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:56:06,259 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2022-03-19 23:56:06,260 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 23:56:06,260 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2022-03-19 23:56:06,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-19 23:56:06,260 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:56:06,260 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] [2022-03-19 23:56:06,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 23:56:06,461 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 [2022-03-19 23:56:06,462 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:56:06,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:56:06,462 INFO L85 PathProgramCache]: Analyzing trace with hash 962099791, now seen corresponding path program 1 times [2022-03-19 23:56:06,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:56:06,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301939377] [2022-03-19 23:56:06,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:56:06,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:56:06,495 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:56:06,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [417276556] [2022-03-19 23:56:06,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:56:06,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:56:06,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:56:06,501 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) [2022-03-19 23:56:06,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 23:56:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:06,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 23:56:06,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:56:06,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:56:06,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 23:56:06,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:56:06,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301939377] [2022-03-19 23:56:06,659 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:56:06,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417276556] [2022-03-19 23:56:06,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417276556] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:56:06,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:56:06,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 23:56:06,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236839661] [2022-03-19 23:56:06,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:56:06,660 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 23:56:06,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:56:06,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 23:56:06,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:56:06,661 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 23:56:06,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:56:06,697 INFO L93 Difference]: Finished difference Result 49 states and 64 transitions. [2022-03-19 23:56:06,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 23:56:06,700 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-03-19 23:56:06,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:56:06,702 INFO L225 Difference]: With dead ends: 49 [2022-03-19 23:56:06,703 INFO L226 Difference]: Without dead ends: 40 [2022-03-19 23:56:06,703 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:56:06,705 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:56:06,707 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 149 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:56:06,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-19 23:56:06,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-03-19 23:56:06,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 23:56:06,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2022-03-19 23:56:06,714 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 21 [2022-03-19 23:56:06,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:56:06,714 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2022-03-19 23:56:06,714 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 23:56:06,714 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2022-03-19 23:56:06,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-19 23:56:06,715 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:56:06,715 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] [2022-03-19 23:56:06,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 23:56:06,915 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 [2022-03-19 23:56:06,916 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:56:06,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:56:06,916 INFO L85 PathProgramCache]: Analyzing trace with hash 963589341, now seen corresponding path program 1 times [2022-03-19 23:56:06,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:56:06,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819921348] [2022-03-19 23:56:06,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:56:06,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:56:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:07,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:56:07,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:07,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 23:56:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:07,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:56:07,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:56:07,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819921348] [2022-03-19 23:56:07,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819921348] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:56:07,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:56:07,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 23:56:07,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187927568] [2022-03-19 23:56:07,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:56:07,192 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 23:56:07,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:56:07,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 23:56:07,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-19 23:56:07,193 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 23:56:11,232 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:56:11,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:56:11,360 INFO L93 Difference]: Finished difference Result 72 states and 104 transitions. [2022-03-19 23:56:11,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 23:56:11,361 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-03-19 23:56:11,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:56:11,362 INFO L225 Difference]: With dead ends: 72 [2022-03-19 23:56:11,362 INFO L226 Difference]: Without dead ends: 51 [2022-03-19 23:56:11,362 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-19 23:56:11,363 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 24 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 40 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:56:11,363 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 133 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 166 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2022-03-19 23:56:11,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-19 23:56:11,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-03-19 23:56:11,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 23:56:11,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2022-03-19 23:56:11,378 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 21 [2022-03-19 23:56:11,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:56:11,378 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2022-03-19 23:56:11,378 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 23:56:11,379 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2022-03-19 23:56:11,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 23:56:11,379 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:56:11,379 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:56:11,379 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-19 23:56:11,380 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:56:11,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:56:11,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1701877900, now seen corresponding path program 1 times [2022-03-19 23:56:11,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:56:11,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766544184] [2022-03-19 23:56:11,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:56:11,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:56:11,393 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:56:11,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [780335348] [2022-03-19 23:56:11,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:56:11,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:56:11,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:56:11,395 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) [2022-03-19 23:56:11,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 23:56:11,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:11,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 23:56:11,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:56:11,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:56:11,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:56:11,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:56:11,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:56:11,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766544184] [2022-03-19 23:56:11,576 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:56:11,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780335348] [2022-03-19 23:56:11,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780335348] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:56:11,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 23:56:11,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-19 23:56:11,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027727990] [2022-03-19 23:56:11,577 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 23:56:11,577 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 23:56:11,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:56:11,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 23:56:11,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-19 23:56:11,578 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-19 23:56:14,848 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:56:16,885 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:56:18,887 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:56:20,892 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:56:22,980 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:56:25,385 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:56:25,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:56:25,660 INFO L93 Difference]: Finished difference Result 100 states and 138 transitions. [2022-03-19 23:56:25,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 23:56:25,660 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2022-03-19 23:56:25,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:56:25,662 INFO L225 Difference]: With dead ends: 100 [2022-03-19 23:56:25,662 INFO L226 Difference]: Without dead ends: 81 [2022-03-19 23:56:25,663 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-19 23:56:25,663 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 49 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 11 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:56:25,664 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 283 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 76 Invalid, 6 Unknown, 0 Unchecked, 14.0s Time] [2022-03-19 23:56:25,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-19 23:56:25,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2022-03-19 23:56:25,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 47 states have internal predecessors, (55), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-19 23:56:25,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 101 transitions. [2022-03-19 23:56:25,677 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 101 transitions. Word has length 23 [2022-03-19 23:56:25,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:56:25,677 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 101 transitions. [2022-03-19 23:56:25,677 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-19 23:56:25,677 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 101 transitions. [2022-03-19 23:56:25,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-19 23:56:25,678 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:56:25,678 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:56:25,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-19 23:56:25,891 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:56:25,891 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:56:25,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:56:25,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1564262277, now seen corresponding path program 1 times [2022-03-19 23:56:25,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:56:25,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047665807] [2022-03-19 23:56:25,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:56:25,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:56:25,902 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:56:25,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1917807825] [2022-03-19 23:56:25,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:56:25,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:56:25,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:56:25,903 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) [2022-03-19 23:56:25,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 23:56:25,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:25,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 23:56:25,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:56:26,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:56:26,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:56:26,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:56:26,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:56:26,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047665807] [2022-03-19 23:56:26,072 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:56:26,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917807825] [2022-03-19 23:56:26,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917807825] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:56:26,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 23:56:26,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-19 23:56:26,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722893647] [2022-03-19 23:56:26,073 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 23:56:26,073 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 23:56:26,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:56:26,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 23:56:26,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-19 23:56:26,074 INFO L87 Difference]: Start difference. First operand 75 states and 101 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-19 23:56:30,481 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:56:32,483 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:56:34,485 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:56:37,560 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:56:39,563 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:56:41,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:56:41,759 INFO L93 Difference]: Finished difference Result 149 states and 205 transitions. [2022-03-19 23:56:41,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 23:56:41,759 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2022-03-19 23:56:41,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:56:41,761 INFO L225 Difference]: With dead ends: 149 [2022-03-19 23:56:41,761 INFO L226 Difference]: Without dead ends: 133 [2022-03-19 23:56:41,761 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-03-19 23:56:41,762 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 141 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 59 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2022-03-19 23:56:41,762 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 357 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 147 Invalid, 3 Unknown, 0 Unchecked, 15.6s Time] [2022-03-19 23:56:41,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-19 23:56:41,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 124. [2022-03-19 23:56:41,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 68 states have (on average 1.338235294117647) internal successors, (91), 73 states have internal predecessors, (91), 46 states have call successors, (46), 10 states have call predecessors, (46), 9 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-19 23:56:41,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 177 transitions. [2022-03-19 23:56:41,786 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 177 transitions. Word has length 24 [2022-03-19 23:56:41,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:56:41,787 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 177 transitions. [2022-03-19 23:56:41,787 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-19 23:56:41,787 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 177 transitions. [2022-03-19 23:56:41,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-19 23:56:41,788 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:56:41,788 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:56:41,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 23:56:41,988 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:56:41,988 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:56:41,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:56:41,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1562772727, now seen corresponding path program 1 times [2022-03-19 23:56:41,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:56:41,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472955123] [2022-03-19 23:56:41,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:56:41,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:56:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:42,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:56:42,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:42,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 23:56:42,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:42,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:56:42,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:56:42,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472955123] [2022-03-19 23:56:42,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472955123] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:56:42,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750133849] [2022-03-19 23:56:42,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:56:42,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:56:42,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:56:42,196 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) [2022-03-19 23:56:42,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 23:56:42,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:42,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 23:56:42,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:56:42,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:56:42,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:56:42,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:56:42,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750133849] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:56:42,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:56:42,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-03-19 23:56:42,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667105925] [2022-03-19 23:56:42,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:56:42,553 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 23:56:42,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:56:42,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 23:56:42,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-03-19 23:56:42,554 INFO L87 Difference]: Start difference. First operand 124 states and 177 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 23:56:46,443 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:56:52,643 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:56:57,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:56:57,098 INFO L93 Difference]: Finished difference Result 198 states and 288 transitions. [2022-03-19 23:56:57,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 23:56:57,099 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-03-19 23:56:57,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:56:57,101 INFO L225 Difference]: With dead ends: 198 [2022-03-19 23:56:57,101 INFO L226 Difference]: Without dead ends: 181 [2022-03-19 23:56:57,102 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-03-19 23:56:57,102 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 48 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 121 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:56:57,103 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 262 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 451 Invalid, 2 Unknown, 0 Unchecked, 14.4s Time] [2022-03-19 23:56:57,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-03-19 23:56:57,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 174. [2022-03-19 23:56:57,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 95 states have (on average 1.2736842105263158) internal successors, (121), 103 states have internal predecessors, (121), 65 states have call successors, (65), 14 states have call predecessors, (65), 13 states have return successors, (57), 56 states have call predecessors, (57), 57 states have call successors, (57) [2022-03-19 23:56:57,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 243 transitions. [2022-03-19 23:56:57,128 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 243 transitions. Word has length 24 [2022-03-19 23:56:57,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:56:57,128 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 243 transitions. [2022-03-19 23:56:57,129 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 23:56:57,129 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 243 transitions. [2022-03-19 23:56:57,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-19 23:56:57,130 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:56:57,130 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:56:57,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-19 23:56:57,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:56:57,344 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:56:57,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:56:57,344 INFO L85 PathProgramCache]: Analyzing trace with hash -45171523, now seen corresponding path program 1 times [2022-03-19 23:56:57,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:56:57,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736935884] [2022-03-19 23:56:57,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:56:57,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:56:57,351 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:56:57,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1415394643] [2022-03-19 23:56:57,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:56:57,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:56:57,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:56:57,354 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) [2022-03-19 23:56:57,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 23:56:57,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:57,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 23:56:57,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:56:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:56:57,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 23:56:57,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:56:57,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736935884] [2022-03-19 23:56:57,580 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:56:57,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415394643] [2022-03-19 23:56:57,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415394643] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:56:57,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:56:57,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 23:56:57,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112770977] [2022-03-19 23:56:57,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:56:57,581 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 23:56:57,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:56:57,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 23:56:57,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:56:57,582 INFO L87 Difference]: Start difference. First operand 174 states and 243 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:56:58,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:56:58,881 INFO L93 Difference]: Finished difference Result 180 states and 247 transitions. [2022-03-19 23:56:58,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 23:56:58,882 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2022-03-19 23:56:58,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:56:58,883 INFO L225 Difference]: With dead ends: 180 [2022-03-19 23:56:58,883 INFO L226 Difference]: Without dead ends: 156 [2022-03-19 23:56:58,884 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 23:56:58,884 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 6 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:56:58,884 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 174 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-19 23:56:58,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-19 23:56:58,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2022-03-19 23:56:58,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 86 states have (on average 1.2790697674418605) internal successors, (110), 93 states have internal predecessors, (110), 58 states have call successors, (58), 12 states have call predecessors, (58), 11 states have return successors, (51), 50 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-19 23:56:58,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 219 transitions. [2022-03-19 23:56:58,909 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 219 transitions. Word has length 31 [2022-03-19 23:56:58,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:56:58,909 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 219 transitions. [2022-03-19 23:56:58,909 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:56:58,909 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 219 transitions. [2022-03-19 23:56:58,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-19 23:56:58,916 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:56:58,916 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:56:58,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 23:56:59,116 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:56:59,117 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:56:59,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:56:59,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1547125783, now seen corresponding path program 1 times [2022-03-19 23:56:59,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:56:59,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741481721] [2022-03-19 23:56:59,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:56:59,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:56:59,126 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:56:59,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [219980453] [2022-03-19 23:56:59,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:56:59,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:56:59,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:56:59,133 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) [2022-03-19 23:56:59,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 23:56:59,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:56:59,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 23:56:59,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:56:59,333 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 23:56:59,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 23:56:59,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:56:59,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741481721] [2022-03-19 23:56:59,334 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 23:56:59,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219980453] [2022-03-19 23:56:59,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219980453] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:56:59,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:56:59,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 23:56:59,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246615833] [2022-03-19 23:56:59,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:56:59,335 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 23:56:59,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:56:59,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 23:56:59,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:56:59,335 INFO L87 Difference]: Start difference. First operand 156 states and 219 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:57:01,906 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:57:02,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:57:02,009 INFO L93 Difference]: Finished difference Result 186 states and 244 transitions. [2022-03-19 23:57:02,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 23:57:02,010 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-03-19 23:57:02,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:57:02,011 INFO L225 Difference]: With dead ends: 186 [2022-03-19 23:57:02,011 INFO L226 Difference]: Without dead ends: 181 [2022-03-19 23:57:02,012 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 23:57:02,012 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 8 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-19 23:57:02,012 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 172 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-03-19 23:57:02,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-03-19 23:57:02,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 174. [2022-03-19 23:57:02,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 100 states have (on average 1.16) internal successors, (116), 104 states have internal predecessors, (116), 55 states have call successors, (55), 19 states have call predecessors, (55), 18 states have return successors, (51), 50 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-19 23:57:02,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 222 transitions. [2022-03-19 23:57:02,033 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 222 transitions. Word has length 34 [2022-03-19 23:57:02,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:57:02,033 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 222 transitions. [2022-03-19 23:57:02,033 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:57:02,033 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 222 transitions. [2022-03-19 23:57:02,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 23:57:02,034 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:57:02,034 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:57:02,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 23:57:02,238 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:57:02,239 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:57:02,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:57:02,239 INFO L85 PathProgramCache]: Analyzing trace with hash 821435566, now seen corresponding path program 1 times [2022-03-19 23:57:02,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:57:02,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359392233] [2022-03-19 23:57:02,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:57:02,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:57:02,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:57:02,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:57:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:57:02,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 23:57:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:57:02,366 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:57:02,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:57:02,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359392233] [2022-03-19 23:57:02,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359392233] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:57:02,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792183908] [2022-03-19 23:57:02,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:57:02,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:57:02,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:57:02,368 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) [2022-03-19 23:57:02,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 23:57:02,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:57:02,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 23:57:02,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:57:02,525 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:57:02,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:57:02,714 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:57:02,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792183908] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:57:02,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:57:02,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-19 23:57:02,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55052157] [2022-03-19 23:57:02,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:57:02,716 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 23:57:02,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:57:02,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 23:57:02,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-03-19 23:57:02,717 INFO L87 Difference]: Start difference. First operand 174 states and 222 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 23:57:05,403 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:57:07,176 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:57:09,242 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:57:10,814 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:57:14,749 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:57:17,603 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:57:24,141 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:57:26,146 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:57:28,152 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:57:30,473 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 23:57:31,644 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:57:36,209 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 23:57:36,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:57:36,210 INFO L93 Difference]: Finished difference Result 419 states and 550 transitions. [2022-03-19 23:57:36,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-19 23:57:36,213 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2022-03-19 23:57:36,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:57:36,218 INFO L225 Difference]: With dead ends: 419 [2022-03-19 23:57:36,218 INFO L226 Difference]: Without dead ends: 379 [2022-03-19 23:57:36,219 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=716, Unknown=0, NotChecked=0, Total=992 [2022-03-19 23:57:36,219 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 234 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 164 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:57:36,220 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 200 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 518 Invalid, 9 Unknown, 0 Unchecked, 33.1s Time] [2022-03-19 23:57:36,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-03-19 23:57:36,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 344. [2022-03-19 23:57:36,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 194 states have (on average 1.2061855670103092) internal successors, (234), 202 states have internal predecessors, (234), 115 states have call successors, (115), 35 states have call predecessors, (115), 34 states have return successors, (107), 106 states have call predecessors, (107), 107 states have call successors, (107) [2022-03-19 23:57:36,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 456 transitions. [2022-03-19 23:57:36,248 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 456 transitions. Word has length 32 [2022-03-19 23:57:36,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:57:36,249 INFO L478 AbstractCegarLoop]: Abstraction has 344 states and 456 transitions. [2022-03-19 23:57:36,249 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 23:57:36,249 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 456 transitions. [2022-03-19 23:57:36,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 23:57:36,250 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:57:36,250 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:57:36,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 23:57:36,463 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 23:57:36,464 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:57:36,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:57:36,464 INFO L85 PathProgramCache]: Analyzing trace with hash -271152338, now seen corresponding path program 2 times [2022-03-19 23:57:36,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:57:36,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827287051] [2022-03-19 23:57:36,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:57:36,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:57:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:57:36,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:57:36,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:57:36,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 23:57:36,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:57:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:57:36,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:57:36,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827287051] [2022-03-19 23:57:36,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827287051] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:57:36,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862690342] [2022-03-19 23:57:36,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:57:36,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:57:36,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:57:36,684 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:57:36,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 23:57:36,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 23:57:36,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:57:36,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 23:57:36,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:57:36,837 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-03-19 23:57:36,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 23:57:36,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862690342] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:57:36,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 23:57:36,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 18 [2022-03-19 23:57:36,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721663666] [2022-03-19 23:57:36,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:57:36,838 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 23:57:36,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:57:36,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 23:57:36,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-03-19 23:57:36,839 INFO L87 Difference]: Start difference. First operand 344 states and 456 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 23:57:36,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:57:36,901 INFO L93 Difference]: Finished difference Result 381 states and 505 transitions. [2022-03-19 23:57:36,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 23:57:36,902 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2022-03-19 23:57:36,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:57:36,904 INFO L225 Difference]: With dead ends: 381 [2022-03-19 23:57:36,904 INFO L226 Difference]: Without dead ends: 341 [2022-03-19 23:57:36,904 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-03-19 23:57:36,905 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:57:36,905 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 167 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:57:36,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-03-19 23:57:36,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 292. [2022-03-19 23:57:36,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 162 states have (on average 1.1975308641975309) internal successors, (194), 168 states have internal predecessors, (194), 99 states have call successors, (99), 31 states have call predecessors, (99), 30 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-03-19 23:57:36,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 385 transitions. [2022-03-19 23:57:36,928 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 385 transitions. Word has length 50 [2022-03-19 23:57:36,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:57:36,928 INFO L478 AbstractCegarLoop]: Abstraction has 292 states and 385 transitions. [2022-03-19 23:57:36,928 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 23:57:36,929 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 385 transitions. [2022-03-19 23:57:36,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-19 23:57:36,930 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:57:36,930 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:57:36,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 23:57:37,147 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:57:37,147 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:57:37,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:57:37,147 INFO L85 PathProgramCache]: Analyzing trace with hash 109392637, now seen corresponding path program 1 times [2022-03-19 23:57:37,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:57:37,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119832745] [2022-03-19 23:57:37,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:57:37,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:57:37,162 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 23:57:37,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [941405397] [2022-03-19 23:57:37,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:57:37,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:57:37,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:57:37,163 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:57:37,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process