/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/prod4br-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 14:21:59,300 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 14:21:59,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 14:21:59,323 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-23 14:21:59,366 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 [2022-02-23 14:21:59,390 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 14:21:59,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 14:21:59,391 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-23 14:21:59,391 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-23 14:21:59,391 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 14:21:59,391 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 14:21:59,391 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 14:21:59,392 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 14:21:59,392 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 14:21:59,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 14:21:59,392 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 14:21:59,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 14:21:59,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 14:21:59,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 14:21:59,392 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 14:21:59,392 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 14:21:59,392 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 14:21:59,392 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 14:21:59,392 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 14:21:59,393 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 14:21:59,393 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 14:21:59,393 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 14:21:59,393 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 14:21:59,393 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 14:21:59,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 14:21:59,393 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 14:21:59,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 14:21:59,393 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 14:21:59,393 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 14:21:59,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 14:21:59,393 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-23 14:21:59,394 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-02-23 14:21:59,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 14:21:59,394 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 14:21:59,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 14:21:59,598 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 14:21:59,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 14:21:59,600 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 14:21:59,603 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 14:21:59,603 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound100.c [2022-02-23 14:21:59,652 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bcfb60ca/c94c8b0a8b974d14891f149915c2b605/FLAG172d50839 [2022-02-23 14:22:00,050 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 14:22:00,050 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound100.c [2022-02-23 14:22:00,054 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bcfb60ca/c94c8b0a8b974d14891f149915c2b605/FLAG172d50839 [2022-02-23 14:22:00,062 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bcfb60ca/c94c8b0a8b974d14891f149915c2b605 [2022-02-23 14:22:00,064 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 14:22:00,064 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-23 14:22:00,065 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 14:22:00,065 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 14:22:00,068 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 14:22:00,068 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 02:22:00" (1/1) ... [2022-02-23 14:22:00,069 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@267225c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:22:00, skipping insertion in model container [2022-02-23 14:22:00,069 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 02:22:00" (1/1) ... [2022-02-23 14:22:00,082 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 14:22:00,092 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 14:22:00,233 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/prod4br-ll_unwindbound100.c[524,537] [2022-02-23 14:22:00,260 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 14:22:00,265 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 14:22:00,273 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/prod4br-ll_unwindbound100.c[524,537] [2022-02-23 14:22:00,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 14:22:00,298 INFO L208 MainTranslator]: Completed translation [2022-02-23 14:22:00,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:22:00 WrapperNode [2022-02-23 14:22:00,298 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 14:22:00,298 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 14:22:00,299 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 14:22:00,299 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 14:22:00,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:22:00" (1/1) ... [2022-02-23 14:22:00,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:22:00" (1/1) ... [2022-02-23 14:22:00,319 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:22:00" (1/1) ... [2022-02-23 14:22:00,319 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:22:00" (1/1) ... [2022-02-23 14:22:00,323 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:22:00" (1/1) ... [2022-02-23 14:22:00,327 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:22:00" (1/1) ... [2022-02-23 14:22:00,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:22:00" (1/1) ... [2022-02-23 14:22:00,329 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 14:22:00,330 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 14:22:00,330 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 14:22:00,330 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 14:22:00,331 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:22:00" (1/1) ... [2022-02-23 14:22:00,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 14:22:00,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 14:22:00,350 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) [2022-02-23 14:22:00,368 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 [2022-02-23 14:22:00,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 14:22:00,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 14:22:00,382 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 14:22:00,382 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 14:22:00,382 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 14:22:00,383 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 14:22:00,383 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 14:22:00,383 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 14:22:00,383 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 14:22:00,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 14:22:00,383 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 14:22:00,383 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 14:22:00,383 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 14:22:00,383 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 14:22:00,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 14:22:00,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 14:22:00,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 14:22:00,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 14:22:00,384 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 14:22:00,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 14:22:00,428 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 14:22:00,428 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 14:22:00,546 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 14:22:00,549 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 14:22:00,549 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-23 14:22:00,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 02:22:00 BoogieIcfgContainer [2022-02-23 14:22:00,551 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 14:22:00,552 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 14:22:00,552 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 14:22:00,572 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 14:22:00,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 02:22:00" (1/3) ... [2022-02-23 14:22:00,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d3942fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 02:22:00, skipping insertion in model container [2022-02-23 14:22:00,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:22:00" (2/3) ... [2022-02-23 14:22:00,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d3942fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 02:22:00, skipping insertion in model container [2022-02-23 14:22:00,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 02:22:00" (3/3) ... [2022-02-23 14:22:00,574 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound100.c [2022-02-23 14:22:00,577 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 14:22:00,577 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 14:22:00,617 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 14:22:00,642 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 14:22:00,642 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 14:22:00,660 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-23 14:22:00,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-23 14:22:00,663 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 14:22:00,663 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 14:22:00,663 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 14:22:00,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 14:22:00,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1717894843, now seen corresponding path program 1 times [2022-02-23 14:22:00,675 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 14:22:00,675 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202794954] [2022-02-23 14:22:00,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:22:00,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 14:22:00,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 14:22:00,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 14:22:00,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 14:22:00,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 14:22:00,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 14:22:00,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 14:22:00,805 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 14:22:00,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202794954] [2022-02-23 14:22:00,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202794954] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 14:22:00,805 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 14:22:00,806 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 14:22:00,807 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483625801] [2022-02-23 14:22:00,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 14:22:00,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 14:22:00,809 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 14:22:00,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 14:22:00,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 14:22:00,832 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-02-23 14:22:00,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 14:22:00,896 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2022-02-23 14:22:00,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 14:22:00,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 17 [2022-02-23 14:22:00,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 14:22:00,903 INFO L225 Difference]: With dead ends: 56 [2022-02-23 14:22:00,903 INFO L226 Difference]: Without dead ends: 28 [2022-02-23 14:22:00,905 INFO L932 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 [2022-02-23 14:22:00,909 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 14:22:00,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 14:22:00,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-02-23 14:22:00,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-02-23 14:22:00,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 14:22:00,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-02-23 14:22:00,935 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2022-02-23 14:22:00,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 14:22:00,935 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-02-23 14:22:00,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-02-23 14:22:00,935 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-02-23 14:22:00,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-23 14:22:00,936 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 14:22:00,936 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 14:22:00,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 14:22:00,937 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 14:22:00,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 14:22:00,938 INFO L85 PathProgramCache]: Analyzing trace with hash 444281082, now seen corresponding path program 1 times [2022-02-23 14:22:00,938 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 14:22:00,938 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587872157] [2022-02-23 14:22:00,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:22:00,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 14:22:00,966 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 14:22:00,967 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795596514] [2022-02-23 14:22:00,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:22:00,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 14:22:00,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 14:22:00,972 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) [2022-02-23 14:22:00,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 14:22:01,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 14:22:01,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 14:22:01,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 14:22:01,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 14:22:01,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 14:22:01,138 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 14:22:01,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587872157] [2022-02-23 14:22:01,139 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 14:22:01,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795596514] [2022-02-23 14:22:01,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795596514] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 14:22:01,139 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 14:22:01,139 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 14:22:01,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424704702] [2022-02-23 14:22:01,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 14:22:01,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 14:22:01,140 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 14:22:01,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 14:22:01,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 14:22:01,141 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-02-23 14:22:01,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 14:22:01,160 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2022-02-23 14:22:01,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 14:22:01,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 18 [2022-02-23 14:22:01,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 14:22:01,162 INFO L225 Difference]: With dead ends: 37 [2022-02-23 14:22:01,162 INFO L226 Difference]: Without dead ends: 29 [2022-02-23 14:22:01,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 14:22:01,163 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 14:22:01,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 14:22:01,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-23 14:22:01,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-02-23 14:22:01,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 14:22:01,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-02-23 14:22:01,168 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2022-02-23 14:22:01,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 14:22:01,168 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-02-23 14:22:01,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-02-23 14:22:01,168 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-02-23 14:22:01,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-23 14:22:01,168 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 14:22:01,169 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 14:22:01,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-23 14:22:01,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 14:22:01,398 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 14:22:01,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 14:22:01,398 INFO L85 PathProgramCache]: Analyzing trace with hash 446068542, now seen corresponding path program 1 times [2022-02-23 14:22:01,399 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 14:22:01,399 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766774948] [2022-02-23 14:22:01,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:22:01,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 14:22:01,407 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 14:22:01,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1750447443] [2022-02-23 14:22:01,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:22:01,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 14:22:01,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 14:22:01,409 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) [2022-02-23 14:22:01,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 14:22:01,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 14:22:01,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-23 14:22:01,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 14:22:01,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 14:22:01,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 14:22:01,540 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 14:22:01,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766774948] [2022-02-23 14:22:01,540 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 14:22:01,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750447443] [2022-02-23 14:22:01,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750447443] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 14:22:01,540 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 14:22:01,540 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 14:22:01,540 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743987287] [2022-02-23 14:22:01,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 14:22:01,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 14:22:01,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 14:22:01,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 14:22:01,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 14:22:01,542 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-02-23 14:22:01,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 14:22:01,595 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2022-02-23 14:22:01,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 14:22:01,596 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 18 [2022-02-23 14:22:01,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 14:22:01,597 INFO L225 Difference]: With dead ends: 42 [2022-02-23 14:22:01,597 INFO L226 Difference]: Without dead ends: 40 [2022-02-23 14:22:01,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 14:22:01,598 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 14:22:01,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 90 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 14:22:01,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-23 14:22:01,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2022-02-23 14:22:01,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-23 14:22:01,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-02-23 14:22:01,604 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 18 [2022-02-23 14:22:01,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 14:22:01,604 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-02-23 14:22:01,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-02-23 14:22:01,604 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-02-23 14:22:01,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-23 14:22:01,605 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 14:22:01,605 INFO L514 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, 1] [2022-02-23 14:22:01,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 14:22:01,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-23 14:22:01,821 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 14:22:01,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 14:22:01,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1308579644, now seen corresponding path program 1 times [2022-02-23 14:22:01,822 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 14:22:01,822 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249814167] [2022-02-23 14:22:01,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:22:01,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 14:22:01,843 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 14:22:01,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2026337454] [2022-02-23 14:22:01,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:22:01,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 14:22:01,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 14:22:01,849 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) [2022-02-23 14:22:01,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 14:22:01,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 14:22:01,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-23 14:22:01,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 14:22:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 14:22:02,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 14:22:02,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 14:22:02,310 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 14:22:02,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249814167] [2022-02-23 14:22:02,310 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 14:22:02,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026337454] [2022-02-23 14:22:02,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026337454] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 14:22:02,310 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 14:22:02,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-02-23 14:22:02,311 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214935351] [2022-02-23 14:22:02,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 14:22:02,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-23 14:22:02,311 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 14:22:02,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-23 14:22:02,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-02-23 14:22:02,312 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 14:22:02,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 14:22:02,573 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2022-02-23 14:22:02,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-23 14:22:02,573 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 24 [2022-02-23 14:22:02,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 14:22:02,575 INFO L225 Difference]: With dead ends: 55 [2022-02-23 14:22:02,575 INFO L226 Difference]: Without dead ends: 53 [2022-02-23 14:22:02,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-02-23 14:22:02,576 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 14:22:02,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 173 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 14:22:02,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-02-23 14:22:02,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2022-02-23 14:22:02,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.24) internal successors, (31), 28 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-23 14:22:02,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-02-23 14:22:02,582 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 24 [2022-02-23 14:22:02,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 14:22:02,583 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-02-23 14:22:02,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 14:22:02,583 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-02-23 14:22:02,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-23 14:22:02,583 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 14:22:02,583 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-02-23 14:22:02,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 14:22:02,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 14:22:02,784 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 14:22:02,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 14:22:02,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1797927234, now seen corresponding path program 1 times [2022-02-23 14:22:02,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 14:22:02,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993931218] [2022-02-23 14:22:02,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:22:02,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 14:22:02,793 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 14:22:02,793 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1126577678] [2022-02-23 14:22:02,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:22:02,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 14:22:02,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 14:22:02,794 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) [2022-02-23 14:22:02,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 14:22:02,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 14:22:02,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 14:22:02,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 14:22:02,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 14:22:02,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 14:22:02,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 14:22:02,958 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 14:22:02,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993931218] [2022-02-23 14:22:02,958 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 14:22:02,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126577678] [2022-02-23 14:22:02,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126577678] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 14:22:02,959 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 14:22:02,959 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-02-23 14:22:02,959 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982161280] [2022-02-23 14:22:02,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 14:22:02,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 14:22:02,959 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 14:22:02,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 14:22:02,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-23 14:22:02,960 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-02-23 14:22:03,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 14:22:03,018 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2022-02-23 14:22:03,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 14:22:03,018 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 27 [2022-02-23 14:22:03,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 14:22:03,019 INFO L225 Difference]: With dead ends: 103 [2022-02-23 14:22:03,019 INFO L226 Difference]: Without dead ends: 93 [2022-02-23 14:22:03,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-02-23 14:22:03,020 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 55 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 14:22:03,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 144 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 14:22:03,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-02-23 14:22:03,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2022-02-23 14:22:03,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 60 states have (on average 1.3333333333333333) internal successors, (80), 64 states have internal predecessors, (80), 16 states have call successors, (16), 12 states have call predecessors, (16), 10 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-23 14:22:03,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions. [2022-02-23 14:22:03,029 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 107 transitions. Word has length 27 [2022-02-23 14:22:03,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 14:22:03,030 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 107 transitions. [2022-02-23 14:22:03,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-02-23 14:22:03,030 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 107 transitions. [2022-02-23 14:22:03,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-23 14:22:03,030 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 14:22:03,030 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 14:22:03,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 14:22:03,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 14:22:03,251 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 14:22:03,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 14:22:03,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1799714694, now seen corresponding path program 1 times [2022-02-23 14:22:03,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 14:22:03,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874480489] [2022-02-23 14:22:03,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:22:03,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 14:22:03,276 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 14:22:03,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1748462802] [2022-02-23 14:22:03,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:22:03,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 14:22:03,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 14:22:03,280 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) [2022-02-23 14:22:03,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 14:22:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 14:22:03,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-23 14:22:03,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 14:22:03,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 14:22:03,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 14:22:04,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 14:22:04,693 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 14:22:04,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874480489] [2022-02-23 14:22:04,693 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 14:22:04,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748462802] [2022-02-23 14:22:04,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748462802] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 14:22:04,694 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 14:22:04,694 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2022-02-23 14:22:04,694 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662857399] [2022-02-23 14:22:04,694 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 14:22:04,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-23 14:22:04,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 14:22:04,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-23 14:22:04,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-02-23 14:22:04,695 INFO L87 Difference]: Start difference. First operand 87 states and 107 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 14:22:05,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 14:22:05,793 INFO L93 Difference]: Finished difference Result 127 states and 164 transitions. [2022-02-23 14:22:05,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 14:22:05,794 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 27 [2022-02-23 14:22:05,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 14:22:05,795 INFO L225 Difference]: With dead ends: 127 [2022-02-23 14:22:05,795 INFO L226 Difference]: Without dead ends: 121 [2022-02-23 14:22:05,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-02-23 14:22:05,796 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 71 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-23 14:22:05,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 246 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-23 14:22:05,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-02-23 14:22:05,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 79. [2022-02-23 14:22:05,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 59 states have internal predecessors, (75), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-23 14:22:05,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2022-02-23 14:22:05,806 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 27 [2022-02-23 14:22:05,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 14:22:05,806 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2022-02-23 14:22:05,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 14:22:05,806 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2022-02-23 14:22:05,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-23 14:22:05,806 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 14:22:05,807 INFO L514 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] [2022-02-23 14:22:05,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 14:22:06,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 14:22:06,024 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 14:22:06,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 14:22:06,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1613968938, now seen corresponding path program 1 times [2022-02-23 14:22:06,025 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 14:22:06,025 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215961886] [2022-02-23 14:22:06,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:22:06,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 14:22:06,031 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 14:22:06,031 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1652362218] [2022-02-23 14:22:06,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:22:06,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 14:22:06,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 14:22:06,036 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) [2022-02-23 14:22:06,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 14:22:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 14:22:06,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-23 14:22:06,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 14:22:06,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 14:22:06,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 14:22:06,158 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 14:22:06,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215961886] [2022-02-23 14:22:06,158 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 14:22:06,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652362218] [2022-02-23 14:22:06,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652362218] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 14:22:06,158 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 14:22:06,158 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-23 14:22:06,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090702618] [2022-02-23 14:22:06,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 14:22:06,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 14:22:06,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 14:22:06,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 14:22:06,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-02-23 14:22:06,161 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 14:22:06,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 14:22:06,246 INFO L93 Difference]: Finished difference Result 116 states and 151 transitions. [2022-02-23 14:22:06,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 14:22:06,247 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2022-02-23 14:22:06,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 14:22:06,249 INFO L225 Difference]: With dead ends: 116 [2022-02-23 14:22:06,249 INFO L226 Difference]: Without dead ends: 104 [2022-02-23 14:22:06,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-23 14:22:06,250 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 33 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 14:22:06,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 176 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 14:22:06,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-23 14:22:06,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2022-02-23 14:22:06,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 74 states have (on average 1.3243243243243243) internal successors, (98), 76 states have internal predecessors, (98), 15 states have call successors, (15), 11 states have call predecessors, (15), 9 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-23 14:22:06,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 125 transitions. [2022-02-23 14:22:06,276 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 125 transitions. Word has length 29 [2022-02-23 14:22:06,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 14:22:06,276 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 125 transitions. [2022-02-23 14:22:06,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 14:22:06,277 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 125 transitions. [2022-02-23 14:22:06,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-23 14:22:06,283 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 14:22:06,283 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 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] [2022-02-23 14:22:06,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-02-23 14:22:06,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 14:22:06,499 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 14:22:06,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 14:22:06,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1524039145, now seen corresponding path program 1 times [2022-02-23 14:22:06,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 14:22:06,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104332662] [2022-02-23 14:22:06,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:22:06,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 14:22:06,506 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 14:22:06,506 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2081598005] [2022-02-23 14:22:06,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:22:06,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 14:22:06,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 14:22:06,508 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) [2022-02-23 14:22:06,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 14:22:06,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 14:22:06,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 14:22:06,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 14:22:06,638 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 14:22:06,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 14:22:06,638 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 14:22:06,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104332662] [2022-02-23 14:22:06,638 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 14:22:06,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081598005] [2022-02-23 14:22:06,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081598005] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 14:22:06,639 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 14:22:06,639 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 14:22:06,639 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467869590] [2022-02-23 14:22:06,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 14:22:06,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 14:22:06,640 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 14:22:06,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 14:22:06,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-23 14:22:06,641 INFO L87 Difference]: Start difference. First operand 99 states and 125 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 14:22:06,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 14:22:06,691 INFO L93 Difference]: Finished difference Result 141 states and 180 transitions. [2022-02-23 14:22:06,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 14:22:06,692 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2022-02-23 14:22:06,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 14:22:06,692 INFO L225 Difference]: With dead ends: 141 [2022-02-23 14:22:06,693 INFO L226 Difference]: Without dead ends: 129 [2022-02-23 14:22:06,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-23 14:22:06,693 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 14:22:06,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 149 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 14:22:06,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-02-23 14:22:06,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 113. [2022-02-23 14:22:06,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 85 states have (on average 1.2941176470588236) internal successors, (110), 87 states have internal predecessors, (110), 18 states have call successors, (18), 11 states have call predecessors, (18), 9 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-23 14:22:06,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 143 transitions. [2022-02-23 14:22:06,714 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 143 transitions. Word has length 40 [2022-02-23 14:22:06,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 14:22:06,715 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 143 transitions. [2022-02-23 14:22:06,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 14:22:06,715 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 143 transitions. [2022-02-23 14:22:06,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-23 14:22:06,716 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 14:22:06,716 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 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] [2022-02-23 14:22:06,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-02-23 14:22:06,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 14:22:06,932 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 14:22:06,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 14:22:06,932 INFO L85 PathProgramCache]: Analyzing trace with hash -470105561, now seen corresponding path program 1 times [2022-02-23 14:22:06,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 14:22:06,933 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315435294] [2022-02-23 14:22:06,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:22:06,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 14:22:06,939 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 14:22:06,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1060887844] [2022-02-23 14:22:06,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:22:06,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 14:22:06,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 14:22:06,946 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) [2022-02-23 14:22:06,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 14:22:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 14:22:06,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-23 14:22:06,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 14:22:07,081 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 14:22:07,102 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 14:22:07,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 14:22:07,169 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-23 14:22:07,169 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 14:22:07,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315435294] [2022-02-23 14:22:07,169 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 14:22:07,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060887844] [2022-02-23 14:22:07,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060887844] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 14:22:07,169 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 14:22:07,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-02-23 14:22:07,170 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881974616] [2022-02-23 14:22:07,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 14:22:07,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 14:22:07,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 14:22:07,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 14:22:07,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-02-23 14:22:07,170 INFO L87 Difference]: Start difference. First operand 113 states and 143 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2022-02-23 14:22:07,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 14:22:07,287 INFO L93 Difference]: Finished difference Result 120 states and 149 transitions. [2022-02-23 14:22:07,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 14:22:07,287 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 40 [2022-02-23 14:22:07,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 14:22:07,288 INFO L225 Difference]: With dead ends: 120 [2022-02-23 14:22:07,288 INFO L226 Difference]: Without dead ends: 100 [2022-02-23 14:22:07,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-02-23 14:22:07,289 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 14:22:07,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 126 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 14:22:07,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-02-23 14:22:07,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 66. [2022-02-23 14:22:07,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 50 states have internal predecessors, (63), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 14:22:07,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2022-02-23 14:22:07,294 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 40 [2022-02-23 14:22:07,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 14:22:07,294 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2022-02-23 14:22:07,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2022-02-23 14:22:07,294 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2022-02-23 14:22:07,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-23 14:22:07,295 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 14:22:07,295 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 14:22:07,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-23 14:22:07,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-02-23 14:22:07,504 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 14:22:07,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 14:22:07,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1818717446, now seen corresponding path program 2 times [2022-02-23 14:22:07,504 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 14:22:07,504 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887821566] [2022-02-23 14:22:07,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:22:07,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 14:22:07,511 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 14:22:07,511 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920357321] [2022-02-23 14:22:07,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 14:22:07,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 14:22:07,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 14:22:07,512 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) [2022-02-23 14:22:07,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-23 14:22:07,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 14:22:07,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 14:22:07,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 14:22:07,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 14:22:07,658 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 14:22:07,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 14:22:07,799 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 14:22:07,800 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 14:22:07,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887821566] [2022-02-23 14:22:07,800 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 14:22:07,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920357321] [2022-02-23 14:22:07,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920357321] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 14:22:07,800 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 14:22:07,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-02-23 14:22:07,800 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163298830] [2022-02-23 14:22:07,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 14:22:07,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-23 14:22:07,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 14:22:07,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-23 14:22:07,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-23 14:22:07,801 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-02-23 14:22:07,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 14:22:07,917 INFO L93 Difference]: Finished difference Result 140 states and 177 transitions. [2022-02-23 14:22:07,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-23 14:22:07,917 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 54 [2022-02-23 14:22:07,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 14:22:07,918 INFO L225 Difference]: With dead ends: 140 [2022-02-23 14:22:07,918 INFO L226 Difference]: Without dead ends: 132 [2022-02-23 14:22:07,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-02-23 14:22:07,919 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 153 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 14:22:07,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 248 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 14:22:07,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-02-23 14:22:07,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-02-23 14:22:07,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 103 states have (on average 1.3106796116504855) internal successors, (135), 104 states have internal predecessors, (135), 15 states have call successors, (15), 14 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-23 14:22:07,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 163 transitions. [2022-02-23 14:22:07,926 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 163 transitions. Word has length 54 [2022-02-23 14:22:07,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 14:22:07,927 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 163 transitions. [2022-02-23 14:22:07,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-02-23 14:22:07,927 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 163 transitions. [2022-02-23 14:22:07,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-02-23 14:22:07,941 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 14:22:07,941 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 14:22:07,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-23 14:22:08,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-23 14:22:08,157 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 14:22:08,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 14:22:08,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1397474810, now seen corresponding path program 3 times [2022-02-23 14:22:08,157 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 14:22:08,157 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660205156] [2022-02-23 14:22:08,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 14:22:08,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 14:22:08,165 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 14:22:08,165 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [122795145] [2022-02-23 14:22:08,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 14:22:08,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 14:22:08,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 14:22:08,167 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) [2022-02-23 14:22:08,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process