/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/prodbin-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 19:11:53,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 19:11:53,478 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 19:11:53,519 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-14 19:11:53,539 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 19:11:53,539 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 19:11:53,540 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 19:11:53,540 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 [2022-02-14 19:11:53,553 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 19:11:53,553 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 19:11:53,554 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-14 19:11:53,554 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-14 19:11:53,554 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-14 19:11:53,554 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-14 19:11:53,555 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-14 19:11:53,555 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-14 19:11:53,555 INFO L138 SettingsManager]: * Use SBE=true [2022-02-14 19:11:53,555 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 19:11:53,555 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 19:11:53,555 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 19:11:53,555 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 19:11:53,555 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 19:11:53,556 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 19:11:53,556 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 19:11:53,556 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 19:11:53,556 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 19:11:53,556 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 19:11:53,556 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 19:11:53,556 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 19:11:53,556 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 19:11:53,557 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 19:11:53,557 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 19:11:53,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 19:11:53,557 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 19:11:53,557 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-14 19:11:53,557 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-14 19:11:53,557 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 19:11:53,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-14 19:11:53,557 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-14 19:11:53,558 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-02-14 19:11:53,558 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-14 19:11:53,558 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 19:11:53,709 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 19:11:53,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 19:11:53,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 19:11:53,724 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 19:11:53,733 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 19:11:53,734 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound100.c [2022-02-14 19:11:53,782 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/950ee9fc5/b804b42980334fd9aabb90472a218a85/FLAG74d0af36c [2022-02-14 19:11:54,127 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 19:11:54,128 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound100.c [2022-02-14 19:11:54,131 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/950ee9fc5/b804b42980334fd9aabb90472a218a85/FLAG74d0af36c [2022-02-14 19:11:54,139 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/950ee9fc5/b804b42980334fd9aabb90472a218a85 [2022-02-14 19:11:54,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 19:11:54,142 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-14 19:11:54,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 19:11:54,145 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 19:11:54,147 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 19:11:54,148 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 07:11:54" (1/1) ... [2022-02-14 19:11:54,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b43d322 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 07:11:54, skipping insertion in model container [2022-02-14 19:11:54,149 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 07:11:54" (1/1) ... [2022-02-14 19:11:54,153 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 19:11:54,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 19:11:54,285 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/prodbin-ll_unwindbound100.c[537,550] [2022-02-14 19:11:54,297 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 19:11:54,302 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 19:11:54,309 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/prodbin-ll_unwindbound100.c[537,550] [2022-02-14 19:11:54,311 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 19:11:54,319 INFO L208 MainTranslator]: Completed translation [2022-02-14 19:11:54,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 07:11:54 WrapperNode [2022-02-14 19:11:54,320 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 19:11:54,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 19:11:54,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 19:11:54,321 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 19:11:54,327 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 07:11:54" (1/1) ... [2022-02-14 19:11:54,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 07:11:54" (1/1) ... [2022-02-14 19:11:54,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 07:11:54" (1/1) ... [2022-02-14 19:11:54,332 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 07:11:54" (1/1) ... [2022-02-14 19:11:54,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 07:11:54" (1/1) ... [2022-02-14 19:11:54,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 07:11:54" (1/1) ... [2022-02-14 19:11:54,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 07:11:54" (1/1) ... [2022-02-14 19:11:54,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 19:11:54,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 19:11:54,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 19:11:54,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 19:11:54,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 07:11:54" (1/1) ... [2022-02-14 19:11:54,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 19:11:54,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 19:11:54,360 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) [2022-02-14 19:11:54,366 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 [2022-02-14 19:11:54,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 19:11:54,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 19:11:54,400 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 19:11:54,400 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 19:11:54,401 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 19:11:54,402 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 19:11:54,402 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 19:11:54,402 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 19:11:54,402 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 19:11:54,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 19:11:54,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-14 19:11:54,402 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 19:11:54,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 19:11:54,402 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 19:11:54,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 19:11:54,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 19:11:54,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 19:11:54,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 19:11:54,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 19:11:54,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 19:11:54,450 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 19:11:54,451 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 19:11:54,559 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 19:11:54,563 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 19:11:54,564 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-14 19:11:54,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 07:11:54 BoogieIcfgContainer [2022-02-14 19:11:54,565 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 19:11:54,566 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 19:11:54,566 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 19:11:54,568 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 19:11:54,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 07:11:54" (1/3) ... [2022-02-14 19:11:54,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3778b692 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 07:11:54, skipping insertion in model container [2022-02-14 19:11:54,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 07:11:54" (2/3) ... [2022-02-14 19:11:54,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3778b692 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 07:11:54, skipping insertion in model container [2022-02-14 19:11:54,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 07:11:54" (3/3) ... [2022-02-14 19:11:54,570 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound100.c [2022-02-14 19:11:54,573 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-14 19:11:54,574 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 19:11:54,602 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 19:11:54,607 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 [2022-02-14 19:11:54,607 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 19:11:54,625 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-14 19:11:54,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-14 19:11:54,628 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 19:11:54,628 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 19:11:54,629 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 19:11:54,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 19:11:54,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1523633710, now seen corresponding path program 1 times [2022-02-14 19:11:54,638 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 19:11:54,639 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731418674] [2022-02-14 19:11:54,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:11:54,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 19:11:54,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 19:11:54,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 19:11:54,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 19:11:54,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 19:11:54,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 19:11:54,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 19:11:54,757 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 19:11:54,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731418674] [2022-02-14 19:11:54,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731418674] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 19:11:54,757 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 19:11:54,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 19:11:54,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539073588] [2022-02-14 19:11:54,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 19:11:54,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 19:11:54,762 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 19:11:54,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 19:11:54,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 19:11:54,781 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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) [2022-02-14 19:11:54,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 19:11:54,826 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-02-14 19:11:54,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 19:11:54,828 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 [2022-02-14 19:11:54,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 19:11:54,832 INFO L225 Difference]: With dead ends: 52 [2022-02-14 19:11:54,833 INFO L226 Difference]: Without dead ends: 26 [2022-02-14 19:11:54,834 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 [2022-02-14 19:11:54,837 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 19:11:54,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 35 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 19:11:54,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-02-14 19:11:54,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-02-14 19:11:54,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-14 19:11:54,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-02-14 19:11:54,860 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2022-02-14 19:11:54,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 19:11:54,860 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-02-14 19:11:54,861 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) [2022-02-14 19:11:54,861 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-02-14 19:11:54,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-14 19:11:54,861 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 19:11:54,861 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 19:11:54,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 19:11:54,862 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 19:11:54,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 19:11:54,862 INFO L85 PathProgramCache]: Analyzing trace with hash -991958694, now seen corresponding path program 1 times [2022-02-14 19:11:54,862 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 19:11:54,863 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294466569] [2022-02-14 19:11:54,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:11:54,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 19:11:54,875 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 19:11:54,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574791590] [2022-02-14 19:11:54,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:11:54,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 19:11:54,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 19:11:54,877 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) [2022-02-14 19:11:54,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 19:11:54,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 19:11:54,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-14 19:11:54,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 19:11:54,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 19:11:54,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 19:11:54,981 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 19:11:54,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294466569] [2022-02-14 19:11:54,981 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 19:11:54,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574791590] [2022-02-14 19:11:54,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574791590] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 19:11:54,981 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 19:11:54,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 19:11:54,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405835644] [2022-02-14 19:11:54,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 19:11:54,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 19:11:54,983 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 19:11:54,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 19:11:54,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 19:11:54,984 INFO L87 Difference]: Start difference. First operand 25 states and 28 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) [2022-02-14 19:11:54,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 19:11:54,992 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-02-14 19:11:54,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-14 19:11:54,993 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 [2022-02-14 19:11:54,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 19:11:54,993 INFO L225 Difference]: With dead ends: 34 [2022-02-14 19:11:54,994 INFO L226 Difference]: Without dead ends: 27 [2022-02-14 19:11:54,994 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 [2022-02-14 19:11:54,995 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 19:11:54,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 19:11:54,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-14 19:11:54,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-02-14 19:11:54,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-14 19:11:55,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-02-14 19:11:55,000 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2022-02-14 19:11:55,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 19:11:55,000 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-02-14 19:11:55,000 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) [2022-02-14 19:11:55,001 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-02-14 19:11:55,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-14 19:11:55,001 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 19:11:55,001 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 19:11:55,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-14 19:11:55,208 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 [2022-02-14 19:11:55,209 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 19:11:55,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 19:11:55,209 INFO L85 PathProgramCache]: Analyzing trace with hash -990171234, now seen corresponding path program 1 times [2022-02-14 19:11:55,209 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 19:11:55,209 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11312318] [2022-02-14 19:11:55,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:11:55,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 19:11:55,219 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 19:11:55,219 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1176850834] [2022-02-14 19:11:55,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:11:55,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 19:11:55,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 19:11:55,224 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) [2022-02-14 19:11:55,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 19:11:55,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 19:11:55,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-14 19:11:55,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 19:11:55,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 19:11:55,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 19:11:55,351 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 19:11:55,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11312318] [2022-02-14 19:11:55,351 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 19:11:55,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176850834] [2022-02-14 19:11:55,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176850834] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 19:11:55,352 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 19:11:55,352 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 19:11:55,352 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342606895] [2022-02-14 19:11:55,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 19:11:55,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 19:11:55,352 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 19:11:55,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 19:11:55,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 19:11:55,353 INFO L87 Difference]: Start difference. First operand 27 states and 30 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) [2022-02-14 19:11:55,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 19:11:55,399 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-02-14 19:11:55,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 19:11:55,399 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 [2022-02-14 19:11:55,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 19:11:55,400 INFO L225 Difference]: With dead ends: 38 [2022-02-14 19:11:55,400 INFO L226 Difference]: Without dead ends: 36 [2022-02-14 19:11:55,400 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 [2022-02-14 19:11:55,401 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 19:11:55,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 80 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 19:11:55,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-14 19:11:55,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-02-14 19:11:55,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-14 19:11:55,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-02-14 19:11:55,406 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2022-02-14 19:11:55,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 19:11:55,407 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-02-14 19:11:55,407 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) [2022-02-14 19:11:55,407 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-02-14 19:11:55,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-14 19:11:55,407 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 19:11:55,407 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 19:11:55,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-14 19:11:55,623 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 [2022-02-14 19:11:55,624 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 19:11:55,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 19:11:55,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1094479982, now seen corresponding path program 1 times [2022-02-14 19:11:55,625 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 19:11:55,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791292446] [2022-02-14 19:11:55,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:11:55,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 19:11:55,639 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 19:11:55,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1412696373] [2022-02-14 19:11:55,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:11:55,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 19:11:55,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 19:11:55,642 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) [2022-02-14 19:11:55,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 19:11:55,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 19:11:55,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 19:11:55,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 19:11:55,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 19:11:55,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 19:11:55,726 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 19:11:55,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791292446] [2022-02-14 19:11:55,726 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 19:11:55,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412696373] [2022-02-14 19:11:55,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412696373] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 19:11:55,727 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 19:11:55,727 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 19:11:55,727 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762787381] [2022-02-14 19:11:55,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 19:11:55,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 19:11:55,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 19:11:55,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 19:11:55,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 19:11:55,728 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 19:11:55,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 19:11:55,770 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-02-14 19:11:55,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-14 19:11:55,771 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-02-14 19:11:55,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 19:11:55,772 INFO L225 Difference]: With dead ends: 42 [2022-02-14 19:11:55,772 INFO L226 Difference]: Without dead ends: 35 [2022-02-14 19:11:55,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-14 19:11:55,775 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 19:11:55,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 94 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 19:11:55,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-14 19:11:55,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-02-14 19:11:55,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-14 19:11:55,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-02-14 19:11:55,779 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 24 [2022-02-14 19:11:55,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 19:11:55,779 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-02-14 19:11:55,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 19:11:55,780 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-02-14 19:11:55,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-14 19:11:55,780 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 19:11:55,780 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 19:11:55,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-14 19:11:55,981 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 [2022-02-14 19:11:55,981 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 19:11:55,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 19:11:55,982 INFO L85 PathProgramCache]: Analyzing trace with hash 584619061, now seen corresponding path program 1 times [2022-02-14 19:11:55,982 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 19:11:55,982 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353504196] [2022-02-14 19:11:55,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:11:55,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 19:11:55,990 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 19:11:55,990 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [842194611] [2022-02-14 19:11:55,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:11:55,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 19:11:55,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 19:11:55,992 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) [2022-02-14 19:11:55,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-14 19:11:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 19:11:56,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 19:11:56,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 19:11:56,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 19:11:56,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 19:11:56,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 19:11:56,193 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 19:11:56,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353504196] [2022-02-14 19:11:56,193 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 19:11:56,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842194611] [2022-02-14 19:11:56,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842194611] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 19:11:56,193 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 19:11:56,193 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-02-14 19:11:56,193 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77143289] [2022-02-14 19:11:56,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 19:11:56,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-14 19:11:56,195 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 19:11:56,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-14 19:11:56,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-14 19:11:56,195 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-02-14 19:11:56,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 19:11:56,250 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2022-02-14 19:11:56,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-14 19:11:56,250 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 28 [2022-02-14 19:11:56,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 19:11:56,253 INFO L225 Difference]: With dead ends: 70 [2022-02-14 19:11:56,253 INFO L226 Difference]: Without dead ends: 63 [2022-02-14 19:11:56,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-02-14 19:11:56,254 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 42 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 19:11:56,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 105 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 19:11:56,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-14 19:11:56,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2022-02-14 19:11:56,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 45 states have internal predecessors, (53), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 19:11:56,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-02-14 19:11:56,263 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 28 [2022-02-14 19:11:56,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 19:11:56,263 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-02-14 19:11:56,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-02-14 19:11:56,263 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-02-14 19:11:56,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-14 19:11:56,264 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 19:11:56,264 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 19:11:56,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-14 19:11:56,467 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 [2022-02-14 19:11:56,467 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 19:11:56,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 19:11:56,468 INFO L85 PathProgramCache]: Analyzing trace with hash 586406521, now seen corresponding path program 1 times [2022-02-14 19:11:56,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 19:11:56,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026025366] [2022-02-14 19:11:56,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:11:56,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 19:11:56,478 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 19:11:56,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [131061453] [2022-02-14 19:11:56,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:11:56,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 19:11:56,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 19:11:56,482 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) [2022-02-14 19:11:56,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-14 19:11:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 19:11:56,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-14 19:11:56,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 19:11:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 19:11:57,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 19:11:57,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 19:11:57,992 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 19:11:57,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026025366] [2022-02-14 19:11:57,993 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 19:11:57,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131061453] [2022-02-14 19:11:57,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131061453] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 19:11:57,993 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 19:11:57,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2022-02-14 19:11:57,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488623238] [2022-02-14 19:11:57,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 19:11:57,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-14 19:11:57,994 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 19:11:57,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-14 19:11:57,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-02-14 19:11:57,994 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-14 19:11:58,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 19:11:58,696 INFO L93 Difference]: Finished difference Result 103 states and 121 transitions. [2022-02-14 19:11:58,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-14 19:11:58,696 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 28 [2022-02-14 19:11:58,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 19:11:58,698 INFO L225 Difference]: With dead ends: 103 [2022-02-14 19:11:58,698 INFO L226 Difference]: Without dead ends: 94 [2022-02-14 19:11:58,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-02-14 19:11:58,699 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 54 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 19:11:58,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 241 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 19:11:58,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-02-14 19:11:58,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2022-02-14 19:11:58,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 73 states have internal predecessors, (83), 14 states have call successors, (14), 10 states have call predecessors, (14), 8 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 19:11:58,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2022-02-14 19:11:58,708 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 28 [2022-02-14 19:11:58,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 19:11:58,709 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2022-02-14 19:11:58,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-14 19:11:58,709 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2022-02-14 19:11:58,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-14 19:11:58,710 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 19:11:58,710 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2022-02-14 19:11:58,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-14 19:11:58,910 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 [2022-02-14 19:11:58,911 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 19:11:58,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 19:11:58,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1513703477, now seen corresponding path program 1 times [2022-02-14 19:11:58,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 19:11:58,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283071975] [2022-02-14 19:11:58,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:11:58,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 19:11:58,919 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 19:11:58,919 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [253856187] [2022-02-14 19:11:58,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:11:58,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 19:11:58,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 19:11:58,922 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) [2022-02-14 19:11:58,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-14 19:11:58,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 19:11:58,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-14 19:11:58,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 19:11:59,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 19:11:59,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 19:11:59,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 19:11:59,125 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 19:11:59,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283071975] [2022-02-14 19:11:59,125 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 19:11:59,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253856187] [2022-02-14 19:11:59,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253856187] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 19:11:59,125 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 19:11:59,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-02-14 19:11:59,125 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344777531] [2022-02-14 19:11:59,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 19:11:59,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-14 19:11:59,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 19:11:59,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-14 19:11:59,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-02-14 19:11:59,126 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-14 19:12:01,131 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 19:12:01,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 19:12:01,191 INFO L93 Difference]: Finished difference Result 104 states and 118 transitions. [2022-02-14 19:12:01,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-14 19:12:01,192 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-02-14 19:12:01,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 19:12:01,192 INFO L225 Difference]: With dead ends: 104 [2022-02-14 19:12:01,192 INFO L226 Difference]: Without dead ends: 89 [2022-02-14 19:12:01,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-02-14 19:12:01,193 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-14 19:12:01,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 78 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-02-14 19:12:01,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-02-14 19:12:01,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-02-14 19:12:01,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 70 states have internal predecessors, (77), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 19:12:01,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 99 transitions. [2022-02-14 19:12:01,200 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 99 transitions. Word has length 34 [2022-02-14 19:12:01,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 19:12:01,200 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 99 transitions. [2022-02-14 19:12:01,200 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-14 19:12:01,200 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 99 transitions. [2022-02-14 19:12:01,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-14 19:12:01,201 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 19:12:01,201 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 19:12:01,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-14 19:12:01,422 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 [2022-02-14 19:12:01,423 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 19:12:01,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 19:12:01,423 INFO L85 PathProgramCache]: Analyzing trace with hash 539044694, now seen corresponding path program 1 times [2022-02-14 19:12:01,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 19:12:01,423 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922840784] [2022-02-14 19:12:01,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:12:01,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 19:12:01,430 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 19:12:01,430 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [798335356] [2022-02-14 19:12:01,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:12:01,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 19:12:01,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 19:12:01,431 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) [2022-02-14 19:12:01,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-14 19:12:01,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 19:12:01,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-14 19:12:01,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 19:12:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-14 19:12:05,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 19:12:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-14 19:12:08,859 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 19:12:08,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922840784] [2022-02-14 19:12:08,859 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 19:12:08,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798335356] [2022-02-14 19:12:08,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798335356] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 19:12:08,860 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 19:12:08,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2022-02-14 19:12:08,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671706473] [2022-02-14 19:12:08,860 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 19:12:08,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-14 19:12:08,860 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 19:12:08,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-14 19:12:08,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-02-14 19:12:08,861 INFO L87 Difference]: Start difference. First operand 88 states and 99 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-02-14 19:12:10,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 19:12:10,966 INFO L93 Difference]: Finished difference Result 124 states and 137 transitions. [2022-02-14 19:12:10,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-14 19:12:10,967 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 38 [2022-02-14 19:12:10,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 19:12:10,968 INFO L225 Difference]: With dead ends: 124 [2022-02-14 19:12:10,968 INFO L226 Difference]: Without dead ends: 122 [2022-02-14 19:12:10,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-02-14 19:12:10,969 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 37 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-14 19:12:10,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 336 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 267 Invalid, 0 Unknown, 22 Unchecked, 1.4s Time] [2022-02-14 19:12:10,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-02-14 19:12:10,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2022-02-14 19:12:10,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 92 states have (on average 1.1304347826086956) internal successors, (104), 96 states have internal predecessors, (104), 15 states have call successors, (15), 13 states have call predecessors, (15), 12 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-14 19:12:10,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2022-02-14 19:12:10,978 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 38 [2022-02-14 19:12:10,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 19:12:10,978 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2022-02-14 19:12:10,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-02-14 19:12:10,978 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2022-02-14 19:12:10,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-14 19:12:10,981 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 19:12:10,982 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 19:12:10,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-02-14 19:12:11,191 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 [2022-02-14 19:12:11,191 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 19:12:11,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 19:12:11,192 INFO L85 PathProgramCache]: Analyzing trace with hash -921054650, now seen corresponding path program 2 times [2022-02-14 19:12:11,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 19:12:11,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136650018] [2022-02-14 19:12:11,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:12:11,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 19:12:11,199 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 19:12:11,199 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799322993] [2022-02-14 19:12:11,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 19:12:11,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 19:12:11,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 19:12:11,209 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) [2022-02-14 19:12:11,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-14 19:12:11,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 19:12:11,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 19:12:11,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-14 19:12:11,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 19:12:11,352 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 19:12:11,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 19:12:11,464 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 19:12:11,464 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 19:12:11,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136650018] [2022-02-14 19:12:11,464 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 19:12:11,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799322993] [2022-02-14 19:12:11,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799322993] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 19:12:11,464 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 19:12:11,464 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-02-14 19:12:11,466 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241898351] [2022-02-14 19:12:11,466 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 19:12:11,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-14 19:12:11,467 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 19:12:11,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-14 19:12:11,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-14 19:12:11,468 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-02-14 19:12:11,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 19:12:11,600 INFO L93 Difference]: Finished difference Result 300 states and 341 transitions. [2022-02-14 19:12:11,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-14 19:12:11,601 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 58 [2022-02-14 19:12:11,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 19:12:11,602 INFO L225 Difference]: With dead ends: 300 [2022-02-14 19:12:11,602 INFO L226 Difference]: Without dead ends: 293 [2022-02-14 19:12:11,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-02-14 19:12:11,603 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 122 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 19:12:11,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 162 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 19:12:11,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-02-14 19:12:11,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 283. [2022-02-14 19:12:11,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 221 states have (on average 1.1312217194570136) internal successors, (250), 230 states have internal predecessors, (250), 32 states have call successors, (32), 30 states have call predecessors, (32), 29 states have return successors, (30), 22 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 19:12:11,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 312 transitions. [2022-02-14 19:12:11,621 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 312 transitions. Word has length 58 [2022-02-14 19:12:11,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 19:12:11,622 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 312 transitions. [2022-02-14 19:12:11,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-02-14 19:12:11,622 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 312 transitions. [2022-02-14 19:12:11,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-14 19:12:11,623 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 19:12:11,623 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 19:12:11,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-14 19:12:11,838 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 [2022-02-14 19:12:11,838 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 19:12:11,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 19:12:11,838 INFO L85 PathProgramCache]: Analyzing trace with hash -919267190, now seen corresponding path program 2 times [2022-02-14 19:12:11,838 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 19:12:11,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100443459] [2022-02-14 19:12:11,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:12:11,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 19:12:11,846 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 19:12:11,847 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1548502147] [2022-02-14 19:12:11,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 19:12:11,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 19:12:11,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 19:12:11,850 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) [2022-02-14 19:12:11,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-14 19:12:11,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 19:12:11,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 19:12:11,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-14 19:12:11,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 19:12:18,776 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-14 19:12:18,776 INFO L328 TraceCheckSpWp]: Computing backward predicates...