/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/cohendiv-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 12:23:37,238 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 12:23:37,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 12:23:37,303 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-23 12:23:37,344 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 12:23:37,368 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 12:23:37,368 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 12:23:37,368 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-23 12:23:37,368 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-23 12:23:37,369 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 12:23:37,369 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 12:23:37,369 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 12:23:37,370 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 12:23:37,370 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 12:23:37,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 12:23:37,370 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 12:23:37,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 12:23:37,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 12:23:37,371 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 12:23:37,371 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 12:23:37,371 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 12:23:37,371 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 12:23:37,371 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 12:23:37,371 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 12:23:37,371 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 12:23:37,371 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 12:23:37,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 12:23:37,371 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 12:23:37,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 12:23:37,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 12:23:37,372 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 12:23:37,372 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 12:23:37,372 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 12:23:37,372 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 12:23:37,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 12:23:37,372 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-23 12:23:37,372 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-02-23 12:23:37,372 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 12:23:37,372 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 12:23:37,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 12:23:37,594 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 12:23:37,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 12:23:37,596 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 12:23:37,597 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 12:23:37,598 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound50.c [2022-02-23 12:23:37,639 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f56467734/96fa84e12d5d431f9ceca87560913d29/FLAG3da649b36 [2022-02-23 12:23:37,978 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 12:23:37,979 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound50.c [2022-02-23 12:23:37,989 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f56467734/96fa84e12d5d431f9ceca87560913d29/FLAG3da649b36 [2022-02-23 12:23:38,394 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f56467734/96fa84e12d5d431f9ceca87560913d29 [2022-02-23 12:23:38,396 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 12:23:38,397 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-23 12:23:38,398 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 12:23:38,398 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 12:23:38,400 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 12:23:38,400 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 12:23:38" (1/1) ... [2022-02-23 12:23:38,401 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5187e98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 12:23:38, skipping insertion in model container [2022-02-23 12:23:38,401 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 12:23:38" (1/1) ... [2022-02-23 12:23:38,405 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 12:23:38,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 12:23:38,560 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/cohendiv-ll_unwindbound50.c[576,589] [2022-02-23 12:23:38,575 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 12:23:38,580 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 12:23:38,590 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/cohendiv-ll_unwindbound50.c[576,589] [2022-02-23 12:23:38,595 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 12:23:38,603 INFO L208 MainTranslator]: Completed translation [2022-02-23 12:23:38,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 12:23:38 WrapperNode [2022-02-23 12:23:38,604 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 12:23:38,604 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 12:23:38,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 12:23:38,605 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 12:23:38,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 12:23:38" (1/1) ... [2022-02-23 12:23:38,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 12:23:38" (1/1) ... [2022-02-23 12:23:38,616 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 12:23:38" (1/1) ... [2022-02-23 12:23:38,616 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 12:23:38" (1/1) ... [2022-02-23 12:23:38,623 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 12:23:38" (1/1) ... [2022-02-23 12:23:38,626 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 12:23:38" (1/1) ... [2022-02-23 12:23:38,627 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 12:23:38" (1/1) ... [2022-02-23 12:23:38,628 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 12:23:38,629 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 12:23:38,629 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 12:23:38,629 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 12:23:38,630 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 12:23:38" (1/1) ... [2022-02-23 12:23:38,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 12:23:38,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:23:38,650 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 12:23:38,661 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 12:23:38,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 12:23:38,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 12:23:38,683 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 12:23:38,683 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 12:23:38,683 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 12:23:38,683 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 12:23:38,683 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 12:23:38,683 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 12:23:38,683 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 12:23:38,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 12:23:38,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 12:23:38,684 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 12:23:38,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 12:23:38,684 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 12:23:38,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 12:23:38,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 12:23:38,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 12:23:38,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 12:23:38,684 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 12:23:38,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 12:23:38,729 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 12:23:38,730 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 12:23:38,881 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 12:23:38,885 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 12:23:38,885 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-23 12:23:38,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 12:23:38 BoogieIcfgContainer [2022-02-23 12:23:38,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 12:23:38,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 12:23:38,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 12:23:38,891 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 12:23:38,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 12:23:38" (1/3) ... [2022-02-23 12:23:38,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f04acc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 12:23:38, skipping insertion in model container [2022-02-23 12:23:38,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 12:23:38" (2/3) ... [2022-02-23 12:23:38,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f04acc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 12:23:38, skipping insertion in model container [2022-02-23 12:23:38,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 12:23:38" (3/3) ... [2022-02-23 12:23:38,894 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound50.c [2022-02-23 12:23:38,897 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 12:23:38,898 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 12:23:38,943 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 12:23:38,949 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 12:23:38,949 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 12:23:38,967 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-23 12:23:38,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-23 12:23:38,971 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:23:38,971 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 12:23:38,972 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:23:38,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:23:38,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1588022502, now seen corresponding path program 1 times [2022-02-23 12:23:38,982 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:23:38,983 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543620746] [2022-02-23 12:23:38,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:23:38,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:23:39,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:23:39,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 12:23:39,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:23:39,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 12:23:39,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:23:39,153 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 12:23:39,154 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:23:39,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543620746] [2022-02-23 12:23:39,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543620746] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 12:23:39,155 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 12:23:39,155 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 12:23:39,156 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420870267] [2022-02-23 12:23:39,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 12:23:39,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 12:23:39,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:23:39,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 12:23:39,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 12:23:39,184 INFO L87 Difference]: Start difference. First operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) 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 12:23:39,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:23:39,273 INFO L93 Difference]: Finished difference Result 68 states and 101 transitions. [2022-02-23 12:23:39,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 12:23:39,275 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 12:23:39,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:23:39,282 INFO L225 Difference]: With dead ends: 68 [2022-02-23 12:23:39,282 INFO L226 Difference]: Without dead ends: 34 [2022-02-23 12:23:39,285 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 12:23:39,288 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 12:23:39,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 12:23:39,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-23 12:23:39,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-02-23 12:23:39,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 12:23:39,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-02-23 12:23:39,323 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2022-02-23 12:23:39,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:23:39,324 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-02-23 12:23:39,324 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 12:23:39,324 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-02-23 12:23:39,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-23 12:23:39,325 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:23:39,325 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 12:23:39,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 12:23:39,326 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:23:39,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:23:39,327 INFO L85 PathProgramCache]: Analyzing trace with hash 766070672, now seen corresponding path program 1 times [2022-02-23 12:23:39,327 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:23:39,327 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252195130] [2022-02-23 12:23:39,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:23:39,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:23:39,362 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:23:39,362 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1923085412] [2022-02-23 12:23:39,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:23:39,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:23:39,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:23:39,364 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 12:23:39,365 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 12:23:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:23:39,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 12:23:39,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 12:23:39,475 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 12:23:39,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 12:23:39,476 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:23:39,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252195130] [2022-02-23 12:23:39,476 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 12:23:39,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923085412] [2022-02-23 12:23:39,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923085412] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 12:23:39,479 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 12:23:39,480 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 12:23:39,480 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821989314] [2022-02-23 12:23:39,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 12:23:39,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 12:23:39,481 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:23:39,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 12:23:39,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 12:23:39,482 INFO L87 Difference]: Start difference. First operand 33 states and 42 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 12:23:39,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:23:39,501 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-02-23 12:23:39,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 12:23:39,502 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 12:23:39,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:23:39,506 INFO L225 Difference]: With dead ends: 42 [2022-02-23 12:23:39,506 INFO L226 Difference]: Without dead ends: 35 [2022-02-23 12:23:39,516 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 12:23:39,516 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 12:23:39,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 12:23:39,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-23 12:23:39,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-02-23 12:23:39,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 12:23:39,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-02-23 12:23:39,522 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2022-02-23 12:23:39,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:23:39,523 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-02-23 12:23:39,523 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 12:23:39,523 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-02-23 12:23:39,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-23 12:23:39,523 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:23:39,524 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 12:23:39,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 12:23:39,724 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 12:23:39,725 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:23:39,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:23:39,725 INFO L85 PathProgramCache]: Analyzing trace with hash 767560222, now seen corresponding path program 1 times [2022-02-23 12:23:39,725 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:23:39,725 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990061607] [2022-02-23 12:23:39,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:23:39,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:23:39,734 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:23:39,734 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2003806515] [2022-02-23 12:23:39,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:23:39,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:23:39,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:23:39,740 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 12:23:39,741 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 12:23:39,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:23:39,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 12:23:39,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 12:23:39,868 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 12:23:39,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 12:23:39,868 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:23:39,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990061607] [2022-02-23 12:23:39,869 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 12:23:39,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003806515] [2022-02-23 12:23:39,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003806515] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 12:23:39,869 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 12:23:39,869 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 12:23:39,869 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535322513] [2022-02-23 12:23:39,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 12:23:39,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 12:23:39,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:23:39,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 12:23:39,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 12:23:39,870 INFO L87 Difference]: Start difference. First operand 35 states and 44 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 12:23:39,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:23:39,912 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-02-23 12:23:39,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 12:23:39,912 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 12:23:39,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:23:39,913 INFO L225 Difference]: With dead ends: 45 [2022-02-23 12:23:39,913 INFO L226 Difference]: Without dead ends: 43 [2022-02-23 12:23:39,913 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 12:23:39,914 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 12:23:39,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 149 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 12:23:39,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-02-23 12:23:39,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-02-23 12:23:39,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-23 12:23:39,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2022-02-23 12:23:39,923 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 18 [2022-02-23 12:23:39,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:23:39,924 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2022-02-23 12:23:39,924 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 12:23:39,924 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2022-02-23 12:23:39,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 12:23:39,924 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:23:39,924 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] [2022-02-23 12:23:39,948 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 12:23:40,125 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 12:23:40,125 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:23:40,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:23:40,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1016228092, now seen corresponding path program 1 times [2022-02-23 12:23:40,127 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:23:40,127 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886515090] [2022-02-23 12:23:40,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:23:40,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:23:40,142 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:23:40,142 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2072255034] [2022-02-23 12:23:40,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:23:40,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:23:40,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:23:40,159 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 12:23:40,194 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 12:23:40,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:23:40,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 12:23:40,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 12:23:40,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 12:23:40,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 12:23:40,260 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:23:40,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886515090] [2022-02-23 12:23:40,270 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 12:23:40,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072255034] [2022-02-23 12:23:40,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072255034] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 12:23:40,270 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 12:23:40,270 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 12:23:40,270 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320454251] [2022-02-23 12:23:40,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 12:23:40,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 12:23:40,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:23:40,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 12:23:40,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 12:23:40,271 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 12:23:40,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:23:40,307 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2022-02-23 12:23:40,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 12:23:40,308 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-02-23 12:23:40,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:23:40,308 INFO L225 Difference]: With dead ends: 58 [2022-02-23 12:23:40,309 INFO L226 Difference]: Without dead ends: 55 [2022-02-23 12:23:40,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 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 12:23:40,309 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 13 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 12:23:40,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 149 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 12:23:40,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-23 12:23:40,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-02-23 12:23:40,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-23 12:23:40,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2022-02-23 12:23:40,316 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 23 [2022-02-23 12:23:40,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:23:40,316 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2022-02-23 12:23:40,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 12:23:40,316 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2022-02-23 12:23:40,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-23 12:23:40,317 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:23:40,317 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, 1, 1] [2022-02-23 12:23:40,334 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 12:23:40,531 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 12:23:40,531 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:23:40,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:23:40,533 INFO L85 PathProgramCache]: Analyzing trace with hash 2019703110, now seen corresponding path program 1 times [2022-02-23 12:23:40,533 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:23:40,533 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450275899] [2022-02-23 12:23:40,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:23:40,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:23:40,551 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:23:40,551 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1777162221] [2022-02-23 12:23:40,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:23:40,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:23:40,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:23:40,556 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 12:23:40,557 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 12:23:40,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:23:40,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 12:23:40,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 12:23:40,667 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 12:23:40,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 12:23:40,668 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:23:40,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450275899] [2022-02-23 12:23:40,668 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 12:23:40,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777162221] [2022-02-23 12:23:40,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777162221] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 12:23:40,668 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 12:23:40,668 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 12:23:40,668 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245486100] [2022-02-23 12:23:40,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 12:23:40,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 12:23:40,669 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:23:40,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 12:23:40,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 12:23:40,669 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-23 12:23:40,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:23:40,707 INFO L93 Difference]: Finished difference Result 83 states and 113 transitions. [2022-02-23 12:23:40,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 12:23:40,707 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2022-02-23 12:23:40,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:23:40,709 INFO L225 Difference]: With dead ends: 83 [2022-02-23 12:23:40,709 INFO L226 Difference]: Without dead ends: 81 [2022-02-23 12:23:40,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 12:23:40,709 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 13 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 12:23:40,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 160 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 12:23:40,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-02-23 12:23:40,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2022-02-23 12:23:40,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 46 states have internal predecessors, (56), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-23 12:23:40,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2022-02-23 12:23:40,718 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 31 [2022-02-23 12:23:40,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:23:40,718 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2022-02-23 12:23:40,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-23 12:23:40,718 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2022-02-23 12:23:40,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-23 12:23:40,719 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:23:40,719 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 12:23:40,737 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 12:23:40,935 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 12:23:40,936 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:23:40,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:23:40,936 INFO L85 PathProgramCache]: Analyzing trace with hash 202176206, now seen corresponding path program 1 times [2022-02-23 12:23:40,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:23:40,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239263107] [2022-02-23 12:23:40,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:23:40,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:23:40,950 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:23:40,950 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986217647] [2022-02-23 12:23:40,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:23:40,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:23:40,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:23:40,955 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 12:23:40,956 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 12:23:40,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:23:40,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 12:23:40,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 12:23:41,046 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 12:23:41,047 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 12:23:41,047 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:23:41,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239263107] [2022-02-23 12:23:41,047 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 12:23:41,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986217647] [2022-02-23 12:23:41,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986217647] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 12:23:41,047 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 12:23:41,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 12:23:41,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720821379] [2022-02-23 12:23:41,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 12:23:41,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 12:23:41,048 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:23:41,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 12:23:41,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 12:23:41,048 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 12:23:41,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:23:41,067 INFO L93 Difference]: Finished difference Result 113 states and 153 transitions. [2022-02-23 12:23:41,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 12:23:41,067 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2022-02-23 12:23:41,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:23:41,069 INFO L225 Difference]: With dead ends: 113 [2022-02-23 12:23:41,069 INFO L226 Difference]: Without dead ends: 78 [2022-02-23 12:23:41,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 12:23:41,070 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 12:23:41,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 135 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 12:23:41,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-02-23 12:23:41,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-02-23 12:23:41,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-23 12:23:41,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2022-02-23 12:23:41,077 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 34 [2022-02-23 12:23:41,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:23:41,077 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2022-02-23 12:23:41,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 12:23:41,077 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2022-02-23 12:23:41,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-23 12:23:41,078 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:23:41,078 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 12:23:41,098 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 12:23:41,298 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 12:23:41,298 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:23:41,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:23:41,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1813008070, now seen corresponding path program 1 times [2022-02-23 12:23:41,299 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:23:41,299 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61533640] [2022-02-23 12:23:41,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:23:41,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:23:41,306 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:23:41,307 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1944920299] [2022-02-23 12:23:41,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:23:41,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:23:41,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:23:41,316 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 12:23:41,316 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 12:23:41,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:23:41,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 12:23:41,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 12:23:41,481 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 12:23:41,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 12:23:41,481 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:23:41,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61533640] [2022-02-23 12:23:41,482 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 12:23:41,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944920299] [2022-02-23 12:23:41,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944920299] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 12:23:41,482 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 12:23:41,482 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-23 12:23:41,482 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348886715] [2022-02-23 12:23:41,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 12:23:41,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 12:23:41,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:23:41,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 12:23:41,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-02-23 12:23:41,483 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-23 12:23:41,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:23:41,549 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2022-02-23 12:23:41,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 12:23:41,550 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2022-02-23 12:23:41,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:23:41,551 INFO L225 Difference]: With dead ends: 84 [2022-02-23 12:23:41,551 INFO L226 Difference]: Without dead ends: 82 [2022-02-23 12:23:41,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-23 12:23:41,552 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 12:23:41,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 203 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 12:23:41,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-02-23 12:23:41,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-02-23 12:23:41,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.22) internal successors, (61), 52 states have internal predecessors, (61), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-23 12:23:41,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2022-02-23 12:23:41,558 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 41 [2022-02-23 12:23:41,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:23:41,558 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2022-02-23 12:23:41,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-23 12:23:41,559 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2022-02-23 12:23:41,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-23 12:23:41,559 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:23:41,559 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 12:23:41,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-23 12:23:41,779 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 12:23:41,780 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:23:41,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:23:41,780 INFO L85 PathProgramCache]: Analyzing trace with hash -683043127, now seen corresponding path program 1 times [2022-02-23 12:23:41,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:23:41,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478056865] [2022-02-23 12:23:41,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:23:41,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:23:41,793 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:23:41,793 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1252542219] [2022-02-23 12:23:41,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:23:41,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:23:41,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:23:41,795 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 12:23:41,816 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 12:23:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:23:41,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 12:23:41,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 12:23:41,978 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-23 12:23:41,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 12:23:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-23 12:23:42,155 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:23:42,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478056865] [2022-02-23 12:23:42,155 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 12:23:42,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252542219] [2022-02-23 12:23:42,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252542219] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 12:23:42,155 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 12:23:42,156 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-02-23 12:23:42,156 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853764657] [2022-02-23 12:23:42,156 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 12:23:42,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 12:23:42,156 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:23:42,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 12:23:42,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-02-23 12:23:42,157 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-02-23 12:23:42,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:23:42,233 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2022-02-23 12:23:42,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 12:23:42,234 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 47 [2022-02-23 12:23:42,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:23:42,235 INFO L225 Difference]: With dead ends: 88 [2022-02-23 12:23:42,235 INFO L226 Difference]: Without dead ends: 86 [2022-02-23 12:23:42,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-02-23 12:23:42,236 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 35 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 12:23:42,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 137 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 12:23:42,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-23 12:23:42,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-02-23 12:23:42,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 55 states have internal predecessors, (64), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-23 12:23:42,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2022-02-23 12:23:42,244 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 47 [2022-02-23 12:23:42,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:23:42,245 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2022-02-23 12:23:42,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-02-23 12:23:42,245 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2022-02-23 12:23:42,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-23 12:23:42,246 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:23:42,246 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 12:23:42,263 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 12:23:42,463 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 12:23:42,464 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:23:42,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:23:42,464 INFO L85 PathProgramCache]: Analyzing trace with hash -589126939, now seen corresponding path program 1 times [2022-02-23 12:23:42,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:23:42,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282124620] [2022-02-23 12:23:42,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:23:42,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:23:42,471 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:23:42,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [10992620] [2022-02-23 12:23:42,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:23:42,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:23:42,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:23:42,474 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 12:23:42,540 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 12:23:42,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:23:42,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 12:23:42,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 12:23:42,663 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-23 12:23:42,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 12:23:42,754 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-23 12:23:42,755 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:23:42,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282124620] [2022-02-23 12:23:42,755 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 12:23:42,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10992620] [2022-02-23 12:23:42,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10992620] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 12:23:42,756 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 12:23:42,756 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-02-23 12:23:42,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512373115] [2022-02-23 12:23:42,758 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 12:23:42,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 12:23:42,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:23:42,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 12:23:42,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-23 12:23:42,759 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-02-23 12:23:42,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:23:42,885 INFO L93 Difference]: Finished difference Result 257 states and 311 transitions. [2022-02-23 12:23:42,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 12:23:42,886 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 50 [2022-02-23 12:23:42,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:23:42,887 INFO L225 Difference]: With dead ends: 257 [2022-02-23 12:23:42,887 INFO L226 Difference]: Without dead ends: 250 [2022-02-23 12:23:42,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-02-23 12:23:42,888 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 102 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 12:23:42,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 220 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 12:23:42,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-02-23 12:23:42,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 239. [2022-02-23 12:23:42,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 153 states have (on average 1.1895424836601307) internal successors, (182), 161 states have internal predecessors, (182), 57 states have call successors, (57), 29 states have call predecessors, (57), 28 states have return successors, (52), 48 states have call predecessors, (52), 52 states have call successors, (52) [2022-02-23 12:23:42,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 291 transitions. [2022-02-23 12:23:42,903 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 291 transitions. Word has length 50 [2022-02-23 12:23:42,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:23:42,904 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 291 transitions. [2022-02-23 12:23:42,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-02-23 12:23:42,904 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 291 transitions. [2022-02-23 12:23:42,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-23 12:23:42,904 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:23:42,905 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 12:23:42,937 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 12:23:43,138 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 12:23:43,138 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:23:43,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:23:43,138 INFO L85 PathProgramCache]: Analyzing trace with hash -484699953, now seen corresponding path program 1 times [2022-02-23 12:23:43,138 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:23:43,138 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210889909] [2022-02-23 12:23:43,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:23:43,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:23:43,145 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:23:43,145 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [485430656] [2022-02-23 12:23:43,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:23:43,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:23:43,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:23:43,151 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 12:23:43,152 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 12:23:43,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:23:43,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-23 12:23:43,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 12:23:43,509 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-02-23 12:23:43,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 12:23:43,739 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:23:43,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210889909] [2022-02-23 12:23:43,739 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 12:23:43,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485430656] [2022-02-23 12:23:43,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485430656] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 12:23:43,739 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 12:23:43,739 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-02-23 12:23:43,740 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338684906] [2022-02-23 12:23:43,740 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 12:23:43,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-23 12:23:43,741 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:23:43,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-23 12:23:43,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-02-23 12:23:43,742 INFO L87 Difference]: Start difference. First operand 239 states and 291 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-02-23 12:23:43,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:23:43,895 INFO L93 Difference]: Finished difference Result 318 states and 381 transitions. [2022-02-23 12:23:43,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 12:23:43,895 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 55 [2022-02-23 12:23:43,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:23:43,897 INFO L225 Difference]: With dead ends: 318 [2022-02-23 12:23:43,898 INFO L226 Difference]: Without dead ends: 203 [2022-02-23 12:23:43,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-02-23 12:23:43,900 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 24 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 12:23:43,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 227 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 12:23:43,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-02-23 12:23:43,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2022-02-23 12:23:43,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 130 states have (on average 1.1692307692307693) internal successors, (152), 136 states have internal predecessors, (152), 46 states have call successors, (46), 26 states have call predecessors, (46), 25 states have return successors, (42), 39 states have call predecessors, (42), 42 states have call successors, (42) [2022-02-23 12:23:43,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 240 transitions. [2022-02-23 12:23:43,921 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 240 transitions. Word has length 55 [2022-02-23 12:23:43,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:23:43,921 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 240 transitions. [2022-02-23 12:23:43,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-02-23 12:23:43,922 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 240 transitions. [2022-02-23 12:23:43,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-23 12:23:43,923 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:23:43,923 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 12:23:43,956 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 12:23:44,139 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 12:23:44,140 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:23:44,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:23:44,140 INFO L85 PathProgramCache]: Analyzing trace with hash 611309655, now seen corresponding path program 1 times [2022-02-23 12:23:44,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:23:44,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310883937] [2022-02-23 12:23:44,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:23:44,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:23:44,149 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:23:44,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560693505] [2022-02-23 12:23:44,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:23:44,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:23:44,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:23:44,150 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 12:23:44,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-23 12:23:44,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:23:44,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 12:23:44,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 12:23:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 40 proven. 34 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-02-23 12:23:44,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 12:23:44,446 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-23 12:23:44,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:23:44,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310883937] [2022-02-23 12:23:44,446 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 12:23:44,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560693505] [2022-02-23 12:23:44,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560693505] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 12:23:44,447 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 12:23:44,447 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-02-23 12:23:44,447 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987945187] [2022-02-23 12:23:44,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 12:23:44,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 12:23:44,448 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:23:44,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 12:23:44,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-23 12:23:44,449 INFO L87 Difference]: Start difference. First operand 202 states and 240 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 8 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2022-02-23 12:23:44,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:23:44,580 INFO L93 Difference]: Finished difference Result 308 states and 368 transitions. [2022-02-23 12:23:44,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 12:23:44,582 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 8 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) Word has length 63 [2022-02-23 12:23:44,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:23:44,583 INFO L225 Difference]: With dead ends: 308 [2022-02-23 12:23:44,583 INFO L226 Difference]: Without dead ends: 214 [2022-02-23 12:23:44,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-02-23 12:23:44,584 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 130 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 12:23:44,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 206 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 12:23:44,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-02-23 12:23:44,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2022-02-23 12:23:44,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 138 states have (on average 1.1304347826086956) internal successors, (156), 142 states have internal predecessors, (156), 46 states have call successors, (46), 26 states have call predecessors, (46), 25 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-02-23 12:23:44,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 244 transitions. [2022-02-23 12:23:44,595 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 244 transitions. Word has length 63 [2022-02-23 12:23:44,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:23:44,595 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 244 transitions. [2022-02-23 12:23:44,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 8 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2022-02-23 12:23:44,595 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 244 transitions. [2022-02-23 12:23:44,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-23 12:23:44,596 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 12:23:44,596 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 12:23:44,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-23 12:23:44,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-23 12:23:44,812 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 12:23:44,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 12:23:44,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1777426592, now seen corresponding path program 1 times [2022-02-23 12:23:44,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 12:23:44,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734551035] [2022-02-23 12:23:44,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:23:44,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 12:23:44,833 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 12:23:44,833 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1545973306] [2022-02-23 12:23:44,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 12:23:44,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 12:23:44,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 12:23:44,838 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 12:23:44,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-23 12:23:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 12:23:44,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-23 12:23:44,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 12:23:45,114 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-23 12:23:45,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 12:23:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-02-23 12:23:45,252 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 12:23:45,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734551035] [2022-02-23 12:23:45,252 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 12:23:45,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545973306] [2022-02-23 12:23:45,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545973306] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 12:23:45,253 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 12:23:45,253 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-02-23 12:23:45,253 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238074832] [2022-02-23 12:23:45,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 12:23:45,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-23 12:23:45,253 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 12:23:45,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-23 12:23:45,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-02-23 12:23:45,254 INFO L87 Difference]: Start difference. First operand 210 states and 244 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 8 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-02-23 12:23:45,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 12:23:45,637 INFO L93 Difference]: Finished difference Result 236 states and 272 transitions. [2022-02-23 12:23:45,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 12:23:45,637 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 8 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 79 [2022-02-23 12:23:45,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 12:23:45,637 INFO L225 Difference]: With dead ends: 236 [2022-02-23 12:23:45,637 INFO L226 Difference]: Without dead ends: 0 [2022-02-23 12:23:45,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-02-23 12:23:45,638 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 68 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 12:23:45,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 354 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 12:23:45,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-23 12:23:45,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-23 12:23:45,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-23 12:23:45,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-23 12:23:45,639 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2022-02-23 12:23:45,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 12:23:45,639 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-23 12:23:45,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 8 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-02-23 12:23:45,639 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-23 12:23:45,640 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-23 12:23:45,641 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 12:23:45,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-23 12:23:45,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-23 12:23:45,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-02-23 12:23:46,495 INFO L858 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2022-02-23 12:23:46,495 INFO L858 garLoopResultBuilder]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2022-02-23 12:23:46,496 INFO L858 garLoopResultBuilder]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2022-02-23 12:23:46,496 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2022-02-23 12:23:46,496 INFO L858 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2022-02-23 12:23:46,496 INFO L858 garLoopResultBuilder]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2022-02-23 12:23:46,496 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2022-02-23 12:23:46,496 INFO L854 garLoopResultBuilder]: At program point L37-4(lines 37 61) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= main_~x~0 main_~r~0) (= main_~q~0 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0)))) [2022-02-23 12:23:46,496 INFO L858 garLoopResultBuilder]: For program point mainEXIT(lines 23 65) no Hoare annotation was computed. [2022-02-23 12:23:46,496 INFO L854 garLoopResultBuilder]: At program point L54(line 54) the Hoare annotation is: (or (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= (* 2 .cse0) main_~r~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 .cse0))) (not (<= |old(~counter~0)| 0))) [2022-02-23 12:23:46,496 INFO L858 garLoopResultBuilder]: For program point L54-1(line 54) no Hoare annotation was computed. [2022-02-23 12:23:46,496 INFO L854 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (or (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) (not (<= |old(~counter~0)| 0))) [2022-02-23 12:23:46,496 INFO L858 garLoopResultBuilder]: For program point L46-1(lines 46 58) no Hoare annotation was computed. [2022-02-23 12:23:46,496 INFO L858 garLoopResultBuilder]: For program point mainFINAL(lines 23 65) no Hoare annotation was computed. [2022-02-23 12:23:46,496 INFO L854 garLoopResultBuilder]: At program point L46-3(lines 46 58) the Hoare annotation is: (or (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) (not (<= |old(~counter~0)| 0))) [2022-02-23 12:23:46,496 INFO L858 garLoopResultBuilder]: For program point L46-4(lines 46 58) no Hoare annotation was computed. [2022-02-23 12:23:46,496 INFO L854 garLoopResultBuilder]: At program point L38(line 38) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0)))) [2022-02-23 12:23:46,497 INFO L854 garLoopResultBuilder]: At program point L38-1(line 38) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0)))) [2022-02-23 12:23:46,497 INFO L858 garLoopResultBuilder]: For program point L63(line 63) no Hoare annotation was computed. [2022-02-23 12:23:46,497 INFO L854 garLoopResultBuilder]: At program point L30(line 30) the Hoare annotation is: (or (= ~counter~0 |old(~counter~0)|) (not (<= |old(~counter~0)| 0))) [2022-02-23 12:23:46,497 INFO L854 garLoopResultBuilder]: At program point mainENTRY(lines 23 65) the Hoare annotation is: (or (= ~counter~0 |old(~counter~0)|) (not (<= |old(~counter~0)| 0))) [2022-02-23 12:23:46,497 INFO L858 garLoopResultBuilder]: For program point L30-1(line 30) no Hoare annotation was computed. [2022-02-23 12:23:46,497 INFO L858 garLoopResultBuilder]: For program point L49(lines 46 58) no Hoare annotation was computed. [2022-02-23 12:23:46,497 INFO L854 garLoopResultBuilder]: At program point L47(line 47) the Hoare annotation is: (or (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) (not (<= |old(~counter~0)| 0))) [2022-02-23 12:23:46,497 INFO L854 garLoopResultBuilder]: At program point L47-1(line 47) the Hoare annotation is: (or (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) (not (<= |old(~counter~0)| 0))) [2022-02-23 12:23:46,497 INFO L858 garLoopResultBuilder]: For program point L39(lines 37 61) no Hoare annotation was computed. [2022-02-23 12:23:46,497 INFO L858 garLoopResultBuilder]: For program point L37-1(lines 37 61) no Hoare annotation was computed. [2022-02-23 12:23:46,497 INFO L854 garLoopResultBuilder]: At program point L37-3(lines 37 61) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0)))) [2022-02-23 12:23:46,497 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-02-23 12:23:46,497 INFO L854 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-02-23 12:23:46,497 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-02-23 12:23:46,497 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-02-23 12:23:46,497 INFO L854 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2022-02-23 12:23:46,497 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-02-23 12:23:46,497 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-02-23 12:23:46,498 INFO L858 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2022-02-23 12:23:46,498 INFO L858 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2022-02-23 12:23:46,498 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-02-23 12:23:46,498 INFO L858 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2022-02-23 12:23:46,498 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2022-02-23 12:23:46,498 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2022-02-23 12:23:46,500 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 12:23:46,501 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 12:23:46,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 12:23:46 BoogieIcfgContainer [2022-02-23 12:23:46,512 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 12:23:46,513 INFO L158 Benchmark]: Toolchain (without parser) took 8115.99ms. Allocated memory was 197.1MB in the beginning and 347.1MB in the end (delta: 149.9MB). Free memory was 142.1MB in the beginning and 200.1MB in the end (delta: -57.9MB). Peak memory consumption was 91.3MB. Max. memory is 8.0GB. [2022-02-23 12:23:46,513 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 197.1MB. Free memory is still 158.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 12:23:46,513 INFO L158 Benchmark]: CACSL2BoogieTranslator took 206.33ms. Allocated memory was 197.1MB in the beginning and 347.1MB in the end (delta: 149.9MB). Free memory was 141.9MB in the beginning and 318.2MB in the end (delta: -176.3MB). Peak memory consumption was 9.3MB. Max. memory is 8.0GB. [2022-02-23 12:23:46,514 INFO L158 Benchmark]: Boogie Preprocessor took 23.79ms. Allocated memory is still 347.1MB. Free memory was 318.2MB in the beginning and 316.8MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 12:23:46,514 INFO L158 Benchmark]: RCFGBuilder took 258.87ms. Allocated memory is still 347.1MB. Free memory was 316.8MB in the beginning and 305.6MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-23 12:23:46,515 INFO L158 Benchmark]: TraceAbstraction took 7623.23ms. Allocated memory is still 347.1MB. Free memory was 305.3MB in the beginning and 200.1MB in the end (delta: 105.2MB). Peak memory consumption was 106.2MB. Max. memory is 8.0GB. [2022-02-23 12:23:46,515 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 197.1MB. Free memory is still 158.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 206.33ms. Allocated memory was 197.1MB in the beginning and 347.1MB in the end (delta: 149.9MB). Free memory was 141.9MB in the beginning and 318.2MB in the end (delta: -176.3MB). Peak memory consumption was 9.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.79ms. Allocated memory is still 347.1MB. Free memory was 318.2MB in the beginning and 316.8MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 258.87ms. Allocated memory is still 347.1MB. Free memory was 316.8MB in the beginning and 305.6MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 7623.23ms. Allocated memory is still 347.1MB. Free memory was 305.3MB in the beginning and 200.1MB in the end (delta: 105.2MB). Peak memory consumption was 106.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.6s, OverallIterations: 12, TraceHistogramMax: 11, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 451 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 427 mSDsluCounter, 2096 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1568 mSDsCounter, 277 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 957 IncrementalHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 277 mSolverCounterUnsat, 528 mSDtfsCounter, 957 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 749 GetRequests, 653 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=239occurred in iteration=9, InterpolantAutomatonStates: 88, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 28 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 16 LocationsWithAnnotation, 129 PreInvPairs, 200 NumberOfFragments, 250 HoareAnnotationTreeSize, 129 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 16 FomulaSimplificationsInter, 2803 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 476 NumberOfCodeBlocks, 476 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 699 ConstructedInterpolants, 0 QuantifiedInterpolants, 1996 SizeOfPredicates, 29 NumberOfNonLiveVariables, 1473 ConjunctsInSsa, 112 ConjunctsInUnsatCore, 16 InterpolantComputations, 7 PerfectInterpolantSequences, 861/960 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: (((q * y + r == x && 1 <= r) && 1 <= y) && b == a * y) || !(\old(counter) <= 0) - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: !(\old(counter) <= 0) || ((q * y + r == x && 1 <= y) && b == a * y) RESULT: Ultimate proved your program to be correct! [2022-02-23 12:23:46,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...