/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/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 10:22:23,804 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 10:22:23,807 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 10:22:23,853 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 10:22:23,888 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 10:22:23,888 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 10:22:23,894 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 10:22:23,895 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-19 10:22:23,906 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 10:22:23,907 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 10:22:23,908 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 10:22:23,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 10:22:23,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 10:22:23,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 10:22:23,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 10:22:23,909 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 10:22:23,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 10:22:23,909 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 10:22:23,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 10:22:23,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 10:22:23,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 10:22:23,910 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 10:22:23,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 10:22:23,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 10:22:23,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 10:22:23,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 10:22:23,910 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 10:22:23,910 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 10:22:23,910 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 10:22:23,910 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 10:22:23,911 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 10:22:24,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 10:22:24,150 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 10:22:24,152 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 10:22:24,153 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 10:22:24,153 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 10:22:24,154 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound50.c [2022-03-19 10:22:24,206 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45313163a/c38311ee7daf4147a66bdf73ed0ee2bf/FLAGfe83754cd [2022-03-19 10:22:24,560 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 10:22:24,560 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound50.c [2022-03-19 10:22:24,565 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45313163a/c38311ee7daf4147a66bdf73ed0ee2bf/FLAGfe83754cd [2022-03-19 10:22:24,582 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45313163a/c38311ee7daf4147a66bdf73ed0ee2bf [2022-03-19 10:22:24,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 10:22:24,586 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 10:22:24,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 10:22:24,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 10:22:24,591 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 10:22:24,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:22:24" (1/1) ... [2022-03-19 10:22:24,592 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fb24e92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:22:24, skipping insertion in model container [2022-03-19 10:22:24,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:22:24" (1/1) ... [2022-03-19 10:22:24,598 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 10:22:24,610 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 10:22:24,795 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/egcd-ll_valuebound50.c[489,502] [2022-03-19 10:22:24,822 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 10:22:24,833 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 10:22:24,844 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/egcd-ll_valuebound50.c[489,502] [2022-03-19 10:22:24,862 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 10:22:24,872 INFO L208 MainTranslator]: Completed translation [2022-03-19 10:22:24,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:22:24 WrapperNode [2022-03-19 10:22:24,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 10:22:24,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 10:22:24,875 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 10:22:24,875 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 10:22:24,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:22:24" (1/1) ... [2022-03-19 10:22:24,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:22:24" (1/1) ... [2022-03-19 10:22:24,889 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:22:24" (1/1) ... [2022-03-19 10:22:24,889 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:22:24" (1/1) ... [2022-03-19 10:22:24,899 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:22:24" (1/1) ... [2022-03-19 10:22:24,903 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:22:24" (1/1) ... [2022-03-19 10:22:24,910 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:22:24" (1/1) ... [2022-03-19 10:22:24,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 10:22:24,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 10:22:24,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 10:22:24,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 10:22:24,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:22:24" (1/1) ... [2022-03-19 10:22:24,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 10:22:24,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:22:24,936 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 10:22:24,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 10:22:24,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 10:22:24,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 10:22:24,983 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 10:22:24,983 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 10:22:24,983 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 10:22:24,984 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 10:22:24,984 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 10:22:24,984 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 10:22:24,984 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 10:22:24,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 10:22:24,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 10:22:24,984 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 10:22:24,985 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 10:22:24,985 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 10:22:24,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 10:22:24,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 10:22:24,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 10:22:24,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 10:22:24,986 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 10:22:24,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 10:22:25,039 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 10:22:25,040 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 10:22:25,144 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 10:22:25,150 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 10:22:25,150 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 10:22:25,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:22:25 BoogieIcfgContainer [2022-03-19 10:22:25,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 10:22:25,153 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 10:22:25,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 10:22:25,156 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 10:22:25,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 10:22:24" (1/3) ... [2022-03-19 10:22:25,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@767b224b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:22:25, skipping insertion in model container [2022-03-19 10:22:25,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:22:24" (2/3) ... [2022-03-19 10:22:25,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@767b224b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:22:25, skipping insertion in model container [2022-03-19 10:22:25,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:22:25" (3/3) ... [2022-03-19 10:22:25,159 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound50.c [2022-03-19 10:22:25,164 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 10:22:25,164 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 10:22:25,196 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 10:22:25,201 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 10:22:25,201 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 10:22:25,212 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 10:22:25,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 10:22:25,219 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:22:25,220 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:22:25,220 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:22:25,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:22:25,224 INFO L85 PathProgramCache]: Analyzing trace with hash 870870740, now seen corresponding path program 1 times [2022-03-19 10:22:25,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:25,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [28409581] [2022-03-19 10:22:25,242 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:22:25,243 INFO L85 PathProgramCache]: Analyzing trace with hash 870870740, now seen corresponding path program 2 times [2022-03-19 10:22:25,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:22:25,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837333948] [2022-03-19 10:22:25,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:22:25,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:22:25,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:22:25,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 10:22:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:22:25,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 10:22:25,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:22:25,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 10:22:25,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:22:25,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 10:22:25,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:22:25,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-19 10:22:25,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:22:25,397 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 10:22:25,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:22:25,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837333948] [2022-03-19 10:22:25,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837333948] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:25,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:25,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 10:22:25,401 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:22:25,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [28409581] [2022-03-19 10:22:25,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [28409581] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:25,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:25,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 10:22:25,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976127089] [2022-03-19 10:22:25,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:22:25,405 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 10:22:25,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:25,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 10:22:25,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 10:22:25,428 INFO L87 Difference]: Start difference. First operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 10:22:25,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:22:25,558 INFO L93 Difference]: Finished difference Result 67 states and 105 transitions. [2022-03-19 10:22:25,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 10:22:25,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-19 10:22:25,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:22:25,565 INFO L225 Difference]: With dead ends: 67 [2022-03-19 10:22:25,566 INFO L226 Difference]: Without dead ends: 32 [2022-03-19 10:22:25,569 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 10:22:25,574 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:22:25,576 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:22:25,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-19 10:22:25,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-19 10:22:25,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 10:22:25,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-03-19 10:22:25,615 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2022-03-19 10:22:25,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:22:25,616 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-03-19 10:22:25,617 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 10:22:25,617 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-03-19 10:22:25,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 10:22:25,619 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:22:25,620 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:22:25,620 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 10:22:25,620 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:22:25,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:22:25,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1006914976, now seen corresponding path program 1 times [2022-03-19 10:22:25,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:25,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1342623038] [2022-03-19 10:22:25,627 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:22:25,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1006914976, now seen corresponding path program 2 times [2022-03-19 10:22:25,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:22:25,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802847476] [2022-03-19 10:22:25,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:22:25,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:22:25,662 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:22:25,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2064693089] [2022-03-19 10:22:25,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:22:25,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:25,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:22:25,669 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:22:25,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 10:22:25,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 10:22:25,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:22:25,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 10:22:25,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:22:25,935 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 10:22:25,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:22:25,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:22:25,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802847476] [2022-03-19 10:22:25,936 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:22:25,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064693089] [2022-03-19 10:22:25,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064693089] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:25,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:25,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:22:25,938 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:22:25,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1342623038] [2022-03-19 10:22:25,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1342623038] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:25,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:25,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:22:25,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611209369] [2022-03-19 10:22:25,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:22:25,939 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:22:25,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:25,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:22:25,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 10:22:25,940 INFO L87 Difference]: Start difference. First operand 32 states and 42 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-19 10:22:26,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:22:26,011 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2022-03-19 10:22:26,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 10:22:26,012 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2022-03-19 10:22:26,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:22:26,013 INFO L225 Difference]: With dead ends: 48 [2022-03-19 10:22:26,013 INFO L226 Difference]: Without dead ends: 46 [2022-03-19 10:22:26,013 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 10:22:26,014 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:22:26,014 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 155 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:22:26,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-19 10:22:26,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-03-19 10:22:26,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 10:22:26,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2022-03-19 10:22:26,026 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 33 [2022-03-19 10:22:26,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:22:26,026 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2022-03-19 10:22:26,027 INFO L479 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-19 10:22:26,027 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2022-03-19 10:22:26,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 10:22:26,028 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:22:26,028 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:22:26,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 10:22:26,245 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:26,245 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:22:26,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:22:26,246 INFO L85 PathProgramCache]: Analyzing trace with hash -124657161, now seen corresponding path program 1 times [2022-03-19 10:22:26,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:26,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1793444832] [2022-03-19 10:22:26,246 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:22:26,246 INFO L85 PathProgramCache]: Analyzing trace with hash -124657161, now seen corresponding path program 2 times [2022-03-19 10:22:26,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:22:26,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477261853] [2022-03-19 10:22:26,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:22:26,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:22:26,271 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:22:26,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2026498731] [2022-03-19 10:22:26,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:22:26,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:26,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:22:26,273 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:22:26,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 10:22:26,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:22:26,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:22:26,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 10:22:26,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:22:26,441 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 10:22:26,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:22:26,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:22:26,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477261853] [2022-03-19 10:22:26,442 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:22:26,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026498731] [2022-03-19 10:22:26,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026498731] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:26,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:26,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:22:26,443 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:22:26,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1793444832] [2022-03-19 10:22:26,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1793444832] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:26,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:26,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:22:26,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767965357] [2022-03-19 10:22:26,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:22:26,444 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:22:26,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:26,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:22:26,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 10:22:26,445 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 10:22:26,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:22:26,486 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2022-03-19 10:22:26,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 10:22:26,487 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-03-19 10:22:26,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:22:26,488 INFO L225 Difference]: With dead ends: 52 [2022-03-19 10:22:26,488 INFO L226 Difference]: Without dead ends: 50 [2022-03-19 10:22:26,488 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 10:22:26,489 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:22:26,489 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 156 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:22:26,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-19 10:22:26,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-03-19 10:22:26,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 10:22:26,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2022-03-19 10:22:26,497 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 38 [2022-03-19 10:22:26,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:22:26,498 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2022-03-19 10:22:26,498 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 10:22:26,498 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2022-03-19 10:22:26,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 10:22:26,499 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:22:26,499 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:22:26,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 10:22:26,718 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-19 10:22:26,718 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:22:26,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:22:26,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1732898944, now seen corresponding path program 1 times [2022-03-19 10:22:26,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:26,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1385909132] [2022-03-19 10:22:26,720 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:22:26,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1732898944, now seen corresponding path program 2 times [2022-03-19 10:22:26,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:22:26,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236816624] [2022-03-19 10:22:26,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:22:26,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:22:26,735 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:22:26,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [482455704] [2022-03-19 10:22:26,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:22:26,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:26,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:22:26,737 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:22:26,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 10:22:26,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:22:26,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:22:26,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 10:22:26,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:22:26,879 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 10:22:26,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:22:26,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:22:26,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236816624] [2022-03-19 10:22:26,880 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:22:26,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482455704] [2022-03-19 10:22:26,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482455704] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:26,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:26,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:22:26,881 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:22:26,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1385909132] [2022-03-19 10:22:26,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1385909132] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:26,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:26,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:22:26,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335371131] [2022-03-19 10:22:26,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:22:26,882 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:22:26,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:26,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:22:26,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 10:22:26,883 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 10:22:26,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:22:26,921 INFO L93 Difference]: Finished difference Result 74 states and 105 transitions. [2022-03-19 10:22:26,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 10:22:26,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-03-19 10:22:26,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:22:26,924 INFO L225 Difference]: With dead ends: 74 [2022-03-19 10:22:26,924 INFO L226 Difference]: Without dead ends: 70 [2022-03-19 10:22:26,925 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 10:22:26,925 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:22:26,926 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 155 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:22:26,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-19 10:22:26,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-03-19 10:22:26,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 37 states have internal predecessors, (42), 30 states have call successors, (30), 7 states have call predecessors, (30), 6 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-19 10:22:26,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 98 transitions. [2022-03-19 10:22:26,942 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 98 transitions. Word has length 43 [2022-03-19 10:22:26,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:22:26,942 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 98 transitions. [2022-03-19 10:22:26,942 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 10:22:26,942 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 98 transitions. [2022-03-19 10:22:26,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-19 10:22:26,943 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:22:26,943 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:22:26,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 10:22:27,162 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:27,162 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:22:27,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:22:27,163 INFO L85 PathProgramCache]: Analyzing trace with hash -301191846, now seen corresponding path program 1 times [2022-03-19 10:22:27,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:27,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1672292213] [2022-03-19 10:22:27,163 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:22:27,163 INFO L85 PathProgramCache]: Analyzing trace with hash -301191846, now seen corresponding path program 2 times [2022-03-19 10:22:27,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:22:27,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397590635] [2022-03-19 10:22:27,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:22:27,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:22:27,173 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:22:27,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1289818347] [2022-03-19 10:22:27,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:22:27,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:27,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:22:27,175 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:22:27,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 10:22:27,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:22:27,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:22:27,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 10:22:27,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:22:27,284 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 10:22:27,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:22:27,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:22:27,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397590635] [2022-03-19 10:22:27,284 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:22:27,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289818347] [2022-03-19 10:22:27,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289818347] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:27,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:27,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:22:27,285 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:22:27,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1672292213] [2022-03-19 10:22:27,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1672292213] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:27,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:27,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:22:27,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039056102] [2022-03-19 10:22:27,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:22:27,286 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:22:27,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:27,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:22:27,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 10:22:27,286 INFO L87 Difference]: Start difference. First operand 70 states and 98 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-19 10:22:27,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:22:27,318 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2022-03-19 10:22:27,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 10:22:27,319 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2022-03-19 10:22:27,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:22:27,320 INFO L225 Difference]: With dead ends: 76 [2022-03-19 10:22:27,320 INFO L226 Difference]: Without dead ends: 74 [2022-03-19 10:22:27,321 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 10:22:27,321 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:22:27,322 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 147 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:22:27,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-19 10:22:27,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-03-19 10:22:27,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 36 states have (on average 1.25) internal successors, (45), 40 states have internal predecessors, (45), 30 states have call successors, (30), 8 states have call predecessors, (30), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-19 10:22:27,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 101 transitions. [2022-03-19 10:22:27,331 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 101 transitions. Word has length 49 [2022-03-19 10:22:27,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:22:27,331 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 101 transitions. [2022-03-19 10:22:27,331 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-19 10:22:27,332 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 101 transitions. [2022-03-19 10:22:27,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-19 10:22:27,332 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:22:27,333 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:22:27,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 10:22:27,552 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:27,553 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:22:27,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:22:27,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1164909737, now seen corresponding path program 1 times [2022-03-19 10:22:27,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:27,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [739887701] [2022-03-19 10:22:27,554 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:22:27,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1164909737, now seen corresponding path program 2 times [2022-03-19 10:22:27,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:22:27,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737427468] [2022-03-19 10:22:27,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:22:27,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:22:27,563 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:22:27,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [718434186] [2022-03-19 10:22:27,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:22:27,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:27,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:22:27,565 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:22:27,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 10:22:27,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:22:27,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:22:27,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 10:22:27,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:22:27,726 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-19 10:22:27,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:22:27,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:22:27,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737427468] [2022-03-19 10:22:27,727 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:22:27,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718434186] [2022-03-19 10:22:27,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718434186] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:27,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:27,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:22:27,728 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:22:27,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [739887701] [2022-03-19 10:22:27,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [739887701] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:27,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:27,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:22:27,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079294972] [2022-03-19 10:22:27,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:22:27,729 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:22:27,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:27,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:22:27,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 10:22:27,729 INFO L87 Difference]: Start difference. First operand 74 states and 101 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-19 10:22:27,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:22:27,763 INFO L93 Difference]: Finished difference Result 84 states and 109 transitions. [2022-03-19 10:22:27,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 10:22:27,764 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-03-19 10:22:27,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:22:27,765 INFO L225 Difference]: With dead ends: 84 [2022-03-19 10:22:27,765 INFO L226 Difference]: Without dead ends: 81 [2022-03-19 10:22:27,765 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 10:22:27,766 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:22:27,766 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 158 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:22:27,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-19 10:22:27,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2022-03-19 10:22:27,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 45 states have internal predecessors, (51), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-19 10:22:27,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2022-03-19 10:22:27,775 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 51 [2022-03-19 10:22:27,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:22:27,775 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2022-03-19 10:22:27,775 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-19 10:22:27,775 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2022-03-19 10:22:27,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-19 10:22:27,776 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:22:27,776 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:22:27,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 10:22:27,997 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:27,998 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:22:27,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:22:27,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1924168317, now seen corresponding path program 1 times [2022-03-19 10:22:27,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:27,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [249226111] [2022-03-19 10:22:27,999 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:22:27,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1924168317, now seen corresponding path program 2 times [2022-03-19 10:22:27,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:22:27,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292767053] [2022-03-19 10:22:27,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:22:28,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:22:28,008 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:22:28,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771090696] [2022-03-19 10:22:28,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:22:28,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:28,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:22:28,010 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:22:28,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 10:22:28,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:22:28,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:22:28,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 10:22:28,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:22:28,172 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-19 10:22:28,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:22:28,313 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-19 10:22:28,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:22:28,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292767053] [2022-03-19 10:22:28,313 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:22:28,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771090696] [2022-03-19 10:22:28,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771090696] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:22:28,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:22:28,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-19 10:22:28,314 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:22:28,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [249226111] [2022-03-19 10:22:28,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [249226111] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:28,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:28,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 10:22:28,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537805947] [2022-03-19 10:22:28,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:22:28,315 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 10:22:28,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:28,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 10:22:28,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-19 10:22:28,317 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 10:22:28,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:22:28,416 INFO L93 Difference]: Finished difference Result 88 states and 112 transitions. [2022-03-19 10:22:28,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 10:22:28,416 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2022-03-19 10:22:28,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:22:28,420 INFO L225 Difference]: With dead ends: 88 [2022-03-19 10:22:28,420 INFO L226 Difference]: Without dead ends: 84 [2022-03-19 10:22:28,421 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-19 10:22:28,423 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 14 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:22:28,423 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 158 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:22:28,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-19 10:22:28,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-03-19 10:22:28,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 49 states have internal predecessors, (53), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-19 10:22:28,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2022-03-19 10:22:28,441 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 54 [2022-03-19 10:22:28,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:22:28,441 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2022-03-19 10:22:28,441 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 10:22:28,442 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2022-03-19 10:22:28,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-19 10:22:28,442 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:22:28,442 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:22:28,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-19 10:22:28,658 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:28,658 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:22:28,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:22:28,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1698149216, now seen corresponding path program 3 times [2022-03-19 10:22:28,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:28,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [818327525] [2022-03-19 10:22:28,660 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:22:28,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1698149216, now seen corresponding path program 4 times [2022-03-19 10:22:28,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:22:28,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545876464] [2022-03-19 10:22:28,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:22:28,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:22:28,691 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:22:28,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1444131428] [2022-03-19 10:22:28,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:22:28,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:28,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:22:28,694 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:22:28,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 10:22:28,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:22:28,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:22:28,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 10:22:28,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:22:28,888 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-19 10:22:28,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:22:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-19 10:22:28,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:22:28,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545876464] [2022-03-19 10:22:28,993 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:22:28,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444131428] [2022-03-19 10:22:28,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444131428] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:22:28,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:22:28,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-19 10:22:28,993 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:22:28,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [818327525] [2022-03-19 10:22:28,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [818327525] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:28,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:28,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 10:22:28,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243327105] [2022-03-19 10:22:28,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:22:28,994 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 10:22:28,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:28,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 10:22:28,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-19 10:22:28,995 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 10:22:29,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:22:29,070 INFO L93 Difference]: Finished difference Result 118 states and 147 transitions. [2022-03-19 10:22:29,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 10:22:29,071 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2022-03-19 10:22:29,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:22:29,072 INFO L225 Difference]: With dead ends: 118 [2022-03-19 10:22:29,072 INFO L226 Difference]: Without dead ends: 116 [2022-03-19 10:22:29,072 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-19 10:22:29,072 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 8 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:22:29,073 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 216 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:22:29,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-19 10:22:29,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2022-03-19 10:22:29,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.15625) internal successors, (74), 67 states have internal predecessors, (74), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-19 10:22:29,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2022-03-19 10:22:29,085 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 56 [2022-03-19 10:22:29,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:22:29,085 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2022-03-19 10:22:29,086 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 10:22:29,086 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2022-03-19 10:22:29,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 10:22:29,086 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:22:29,086 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:22:29,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-19 10:22:29,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:29,299 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:22:29,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:22:29,300 INFO L85 PathProgramCache]: Analyzing trace with hash 888099957, now seen corresponding path program 1 times [2022-03-19 10:22:29,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:29,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [47178643] [2022-03-19 10:22:29,300 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:22:29,301 INFO L85 PathProgramCache]: Analyzing trace with hash 888099957, now seen corresponding path program 2 times [2022-03-19 10:22:29,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:22:29,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383214554] [2022-03-19 10:22:29,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:22:29,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:22:29,309 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:22:29,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1856741140] [2022-03-19 10:22:29,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:22:29,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:29,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:22:29,311 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:22:29,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 10:22:29,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:22:29,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:22:29,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 10:22:29,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:22:29,536 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-19 10:22:29,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:22:29,643 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-19 10:22:29,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:22:29,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383214554] [2022-03-19 10:22:29,644 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:22:29,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856741140] [2022-03-19 10:22:29,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856741140] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:22:29,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:22:29,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-19 10:22:29,644 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:22:29,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [47178643] [2022-03-19 10:22:29,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [47178643] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:29,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:29,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 10:22:29,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024301229] [2022-03-19 10:22:29,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:22:29,645 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 10:22:29,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:29,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 10:22:29,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-19 10:22:29,645 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-19 10:22:29,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:22:29,722 INFO L93 Difference]: Finished difference Result 137 states and 178 transitions. [2022-03-19 10:22:29,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 10:22:29,722 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 61 [2022-03-19 10:22:29,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:22:29,727 INFO L225 Difference]: With dead ends: 137 [2022-03-19 10:22:29,727 INFO L226 Difference]: Without dead ends: 131 [2022-03-19 10:22:29,727 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-19 10:22:29,729 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:22:29,729 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 198 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:22:29,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-19 10:22:29,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-03-19 10:22:29,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 42 states have call successors, (42), 16 states have call predecessors, (42), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2022-03-19 10:22:29,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2022-03-19 10:22:29,755 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 61 [2022-03-19 10:22:29,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:22:29,755 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2022-03-19 10:22:29,755 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-19 10:22:29,755 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2022-03-19 10:22:29,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 10:22:29,759 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:22:29,759 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 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, 1] [2022-03-19 10:22:29,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 10:22:29,976 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-19 10:22:29,976 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:22:29,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:22:29,977 INFO L85 PathProgramCache]: Analyzing trace with hash 2064127436, now seen corresponding path program 1 times [2022-03-19 10:22:29,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:29,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1397891388] [2022-03-19 10:22:29,978 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:22:29,978 INFO L85 PathProgramCache]: Analyzing trace with hash 2064127436, now seen corresponding path program 2 times [2022-03-19 10:22:29,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:22:29,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831083999] [2022-03-19 10:22:29,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:22:29,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:22:29,989 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:22:29,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1933007330] [2022-03-19 10:22:29,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:22:29,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:29,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:22:29,999 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:22:30,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 10:22:30,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:22:30,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:22:30,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 10:22:30,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:22:30,222 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-19 10:22:30,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:22:30,340 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-03-19 10:22:30,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:22:30,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831083999] [2022-03-19 10:22:30,341 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:22:30,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933007330] [2022-03-19 10:22:30,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933007330] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 10:22:30,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:22:30,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-03-19 10:22:30,341 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:22:30,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1397891388] [2022-03-19 10:22:30,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1397891388] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:30,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:30,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:22:30,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177886306] [2022-03-19 10:22:30,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:22:30,342 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:22:30,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:30,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:22:30,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-19 10:22:30,343 INFO L87 Difference]: Start difference. First operand 131 states and 167 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-19 10:22:30,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:22:30,375 INFO L93 Difference]: Finished difference Result 137 states and 172 transitions. [2022-03-19 10:22:30,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 10:22:30,375 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 69 [2022-03-19 10:22:30,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:22:30,376 INFO L225 Difference]: With dead ends: 137 [2022-03-19 10:22:30,376 INFO L226 Difference]: Without dead ends: 132 [2022-03-19 10:22:30,376 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-19 10:22:30,377 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:22:30,377 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 128 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:22:30,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-19 10:22:30,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-03-19 10:22:30,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 79 states have internal predecessors, (88), 39 states have call successors, (39), 17 states have call predecessors, (39), 16 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-19 10:22:30,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 164 transitions. [2022-03-19 10:22:30,388 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 164 transitions. Word has length 69 [2022-03-19 10:22:30,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:22:30,389 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 164 transitions. [2022-03-19 10:22:30,389 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-19 10:22:30,389 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 164 transitions. [2022-03-19 10:22:30,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-19 10:22:30,389 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:22:30,390 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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, 1, 1] [2022-03-19 10:22:30,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 10:22:30,618 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 10:22:30,618 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:22:30,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:22:30,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1196252297, now seen corresponding path program 5 times [2022-03-19 10:22:30,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:30,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1064674852] [2022-03-19 10:22:30,619 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:22:30,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1196252297, now seen corresponding path program 6 times [2022-03-19 10:22:30,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:22:30,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334156865] [2022-03-19 10:22:30,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:22:30,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:22:30,642 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:22:30,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [641411194] [2022-03-19 10:22:30,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:22:30,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:30,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:22:30,644 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:22:30,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 10:22:30,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 10:22:30,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:22:30,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 10:22:30,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:22:30,994 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 39 proven. 17 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-03-19 10:22:30,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:22:31,384 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 42 proven. 14 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-03-19 10:22:31,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:22:31,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334156865] [2022-03-19 10:22:31,385 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:22:31,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641411194] [2022-03-19 10:22:31,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641411194] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:22:31,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:22:31,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2022-03-19 10:22:31,385 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:22:31,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1064674852] [2022-03-19 10:22:31,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1064674852] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:31,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:31,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 10:22:31,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485866654] [2022-03-19 10:22:31,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:22:31,386 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 10:22:31,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:31,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 10:22:31,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-19 10:22:31,387 INFO L87 Difference]: Start difference. First operand 132 states and 164 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-19 10:22:31,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:22:31,671 INFO L93 Difference]: Finished difference Result 166 states and 206 transitions. [2022-03-19 10:22:31,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 10:22:31,671 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 74 [2022-03-19 10:22:31,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:22:31,672 INFO L225 Difference]: With dead ends: 166 [2022-03-19 10:22:31,672 INFO L226 Difference]: Without dead ends: 164 [2022-03-19 10:22:31,673 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-03-19 10:22:31,673 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 19 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:22:31,673 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 244 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:22:31,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-03-19 10:22:31,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 150. [2022-03-19 10:22:31,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 88 states have (on average 1.1477272727272727) internal successors, (101), 91 states have internal predecessors, (101), 42 states have call successors, (42), 20 states have call predecessors, (42), 19 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-19 10:22:31,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 183 transitions. [2022-03-19 10:22:31,686 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 183 transitions. Word has length 74 [2022-03-19 10:22:31,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:22:31,686 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 183 transitions. [2022-03-19 10:22:31,686 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-19 10:22:31,686 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 183 transitions. [2022-03-19 10:22:31,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-19 10:22:31,687 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:22:31,687 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:22:31,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 10:22:31,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-19 10:22:31,888 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:22:31,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:22:31,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1712511605, now seen corresponding path program 3 times [2022-03-19 10:22:31,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:31,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2018288064] [2022-03-19 10:22:31,888 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:22:31,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1712511605, now seen corresponding path program 4 times [2022-03-19 10:22:31,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:22:31,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995543687] [2022-03-19 10:22:31,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:22:31,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:22:31,896 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:22:31,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512150781] [2022-03-19 10:22:31,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:22:31,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:31,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:22:31,898 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:22:31,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 10:22:31,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:22:31,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:22:31,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-19 10:22:31,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:22:32,359 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 27 proven. 29 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-03-19 10:22:32,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:22:32,602 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:22:33,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:22:33,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995543687] [2022-03-19 10:22:33,222 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:22:33,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512150781] [2022-03-19 10:22:33,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512150781] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:22:33,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:22:33,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-19 10:22:33,223 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:22:33,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2018288064] [2022-03-19 10:22:33,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2018288064] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:33,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:33,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 10:22:33,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516041406] [2022-03-19 10:22:33,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:22:33,223 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 10:22:33,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:33,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 10:22:33,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-03-19 10:22:33,224 INFO L87 Difference]: Start difference. First operand 150 states and 183 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-19 10:22:33,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:22:33,581 INFO L93 Difference]: Finished difference Result 184 states and 225 transitions. [2022-03-19 10:22:33,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 10:22:33,581 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 74 [2022-03-19 10:22:33,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:22:33,583 INFO L225 Difference]: With dead ends: 184 [2022-03-19 10:22:33,583 INFO L226 Difference]: Without dead ends: 182 [2022-03-19 10:22:33,583 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-03-19 10:22:33,583 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 15 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:22:33,583 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 293 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 10:22:33,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-19 10:22:33,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 168. [2022-03-19 10:22:33,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 100 states have (on average 1.14) internal successors, (114), 103 states have internal predecessors, (114), 45 states have call successors, (45), 23 states have call predecessors, (45), 22 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-19 10:22:33,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 202 transitions. [2022-03-19 10:22:33,600 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 202 transitions. Word has length 74 [2022-03-19 10:22:33,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:22:33,600 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 202 transitions. [2022-03-19 10:22:33,600 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-19 10:22:33,600 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 202 transitions. [2022-03-19 10:22:33,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-19 10:22:33,601 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:22:33,601 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:22:33,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 10:22:33,819 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-19 10:22:33,819 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:22:33,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:22:33,820 INFO L85 PathProgramCache]: Analyzing trace with hash 15858924, now seen corresponding path program 5 times [2022-03-19 10:22:33,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:33,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [615295627] [2022-03-19 10:22:33,820 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:22:33,820 INFO L85 PathProgramCache]: Analyzing trace with hash 15858924, now seen corresponding path program 6 times [2022-03-19 10:22:33,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:22:33,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524548703] [2022-03-19 10:22:33,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:22:33,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:22:33,839 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:22:33,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1405125303] [2022-03-19 10:22:33,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:22:33,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:33,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:22:33,841 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:22:33,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 10:22:33,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 10:22:33,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:22:33,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 10:22:33,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:22:34,061 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-03-19 10:22:34,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:22:34,236 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 27 proven. 14 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-03-19 10:22:34,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:22:34,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524548703] [2022-03-19 10:22:34,236 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:22:34,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405125303] [2022-03-19 10:22:34,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405125303] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:22:34,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:22:34,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2022-03-19 10:22:34,237 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:22:34,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [615295627] [2022-03-19 10:22:34,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [615295627] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:34,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:34,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 10:22:34,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558146228] [2022-03-19 10:22:34,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:22:34,237 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 10:22:34,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:34,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 10:22:34,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-19 10:22:34,238 INFO L87 Difference]: Start difference. First operand 168 states and 202 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-19 10:22:34,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:22:34,426 INFO L93 Difference]: Finished difference Result 182 states and 221 transitions. [2022-03-19 10:22:34,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 10:22:34,427 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 79 [2022-03-19 10:22:34,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:22:34,428 INFO L225 Difference]: With dead ends: 182 [2022-03-19 10:22:34,428 INFO L226 Difference]: Without dead ends: 169 [2022-03-19 10:22:34,428 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 145 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-03-19 10:22:34,429 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:22:34,429 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 186 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:22:34,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-03-19 10:22:34,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 149. [2022-03-19 10:22:34,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 91 states have (on average 1.0879120879120878) internal successors, (99), 95 states have internal predecessors, (99), 36 states have call successors, (36), 22 states have call predecessors, (36), 21 states have return successors, (35), 31 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-19 10:22:34,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 170 transitions. [2022-03-19 10:22:34,445 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 170 transitions. Word has length 79 [2022-03-19 10:22:34,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:22:34,445 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 170 transitions. [2022-03-19 10:22:34,445 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-19 10:22:34,445 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 170 transitions. [2022-03-19 10:22:34,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-19 10:22:34,446 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:22:34,446 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:22:34,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 10:22:34,663 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 10:22:34,664 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:22:34,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:22:34,664 INFO L85 PathProgramCache]: Analyzing trace with hash 2066842922, now seen corresponding path program 3 times [2022-03-19 10:22:34,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:34,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [639352896] [2022-03-19 10:22:34,664 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:22:34,665 INFO L85 PathProgramCache]: Analyzing trace with hash 2066842922, now seen corresponding path program 4 times [2022-03-19 10:22:34,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:22:34,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200768753] [2022-03-19 10:22:34,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:22:34,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:22:34,671 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:22:34,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1403473744] [2022-03-19 10:22:34,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:22:34,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:34,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:22:34,673 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:22:34,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 10:22:34,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:22:34,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:22:34,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-19 10:22:34,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:22:35,164 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 36 proven. 24 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-03-19 10:22:35,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:22:35,444 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 34 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-03-19 10:22:35,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:22:35,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200768753] [2022-03-19 10:22:35,445 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:22:35,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403473744] [2022-03-19 10:22:35,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403473744] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:22:35,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:22:35,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-03-19 10:22:35,446 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:22:35,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [639352896] [2022-03-19 10:22:35,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [639352896] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:35,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:35,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 10:22:35,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181103287] [2022-03-19 10:22:35,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:22:35,447 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 10:22:35,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:35,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 10:22:35,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-03-19 10:22:35,447 INFO L87 Difference]: Start difference. First operand 149 states and 170 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 10:22:35,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:22:35,819 INFO L93 Difference]: Finished difference Result 171 states and 198 transitions. [2022-03-19 10:22:35,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 10:22:35,820 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2022-03-19 10:22:35,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:22:35,821 INFO L225 Difference]: With dead ends: 171 [2022-03-19 10:22:35,821 INFO L226 Difference]: Without dead ends: 169 [2022-03-19 10:22:35,821 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-19 10:22:35,822 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 22 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:22:35,822 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 241 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 10:22:35,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-03-19 10:22:35,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 159. [2022-03-19 10:22:35,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 97 states have (on average 1.092783505154639) internal successors, (106), 101 states have internal predecessors, (106), 39 states have call successors, (39), 23 states have call predecessors, (39), 22 states have return successors, (38), 34 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-19 10:22:35,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 183 transitions. [2022-03-19 10:22:35,843 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 183 transitions. Word has length 79 [2022-03-19 10:22:35,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:22:35,843 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 183 transitions. [2022-03-19 10:22:35,843 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 10:22:35,844 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 183 transitions. [2022-03-19 10:22:35,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-19 10:22:35,847 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:22:35,847 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:22:35,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 10:22:36,070 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 10:22:36,070 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:22:36,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:22:36,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1804875380, now seen corresponding path program 7 times [2022-03-19 10:22:36,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:36,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1077164839] [2022-03-19 10:22:36,071 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:22:36,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1804875380, now seen corresponding path program 8 times [2022-03-19 10:22:36,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:22:36,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808261602] [2022-03-19 10:22:36,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:22:36,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:22:36,084 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:22:36,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [687422629] [2022-03-19 10:22:36,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:22:36,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:36,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:22:36,091 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:22:36,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 10:22:36,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:22:36,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:22:36,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-19 10:22:36,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:22:36,908 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 66 proven. 38 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-03-19 10:22:36,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:22:37,277 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-03-19 10:22:37,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:22:37,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808261602] [2022-03-19 10:22:37,277 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:22:37,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687422629] [2022-03-19 10:22:37,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687422629] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:22:37,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:22:37,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 18 [2022-03-19 10:22:37,278 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:22:37,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1077164839] [2022-03-19 10:22:37,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1077164839] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:37,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:37,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 10:22:37,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032155098] [2022-03-19 10:22:37,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:22:37,278 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 10:22:37,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:37,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 10:22:37,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-03-19 10:22:37,279 INFO L87 Difference]: Start difference. First operand 159 states and 183 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-19 10:22:37,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:22:37,757 INFO L93 Difference]: Finished difference Result 189 states and 221 transitions. [2022-03-19 10:22:37,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 10:22:37,757 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) Word has length 92 [2022-03-19 10:22:37,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:22:37,758 INFO L225 Difference]: With dead ends: 189 [2022-03-19 10:22:37,759 INFO L226 Difference]: Without dead ends: 187 [2022-03-19 10:22:37,759 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-19 10:22:37,759 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 24 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 10:22:37,759 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 222 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 10:22:37,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-03-19 10:22:37,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2022-03-19 10:22:37,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 113 states have (on average 1.0973451327433628) internal successors, (124), 118 states have internal predecessors, (124), 48 states have call successors, (48), 26 states have call predecessors, (48), 25 states have return successors, (47), 42 states have call predecessors, (47), 47 states have call successors, (47) [2022-03-19 10:22:37,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 219 transitions. [2022-03-19 10:22:37,782 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 219 transitions. Word has length 92 [2022-03-19 10:22:37,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:22:37,783 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 219 transitions. [2022-03-19 10:22:37,783 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-19 10:22:37,783 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 219 transitions. [2022-03-19 10:22:37,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-19 10:22:37,783 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:22:37,784 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:22:37,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-19 10:22:38,001 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:38,001 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:22:38,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:22:38,002 INFO L85 PathProgramCache]: Analyzing trace with hash 65583604, now seen corresponding path program 9 times [2022-03-19 10:22:38,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:38,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2112049557] [2022-03-19 10:22:38,002 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:22:38,002 INFO L85 PathProgramCache]: Analyzing trace with hash 65583604, now seen corresponding path program 10 times [2022-03-19 10:22:38,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:22:38,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452483915] [2022-03-19 10:22:38,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:22:38,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:22:38,008 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:22:38,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [935020708] [2022-03-19 10:22:38,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:22:38,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:38,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:22:38,019 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:22:38,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 10:22:38,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:22:38,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:22:38,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-19 10:22:38,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:22:38,786 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 65 proven. 54 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-03-19 10:22:38,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:22:39,165 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-03-19 10:22:39,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:22:39,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452483915] [2022-03-19 10:22:39,165 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:22:39,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935020708] [2022-03-19 10:22:39,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935020708] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:22:39,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:22:39,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 18 [2022-03-19 10:22:39,166 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:22:39,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2112049557] [2022-03-19 10:22:39,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2112049557] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:22:39,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:22:39,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 10:22:39,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330158804] [2022-03-19 10:22:39,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:22:39,167 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 10:22:39,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:39,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 10:22:39,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-03-19 10:22:39,167 INFO L87 Difference]: Start difference. First operand 187 states and 219 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-19 10:22:39,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:22:39,558 INFO L93 Difference]: Finished difference Result 224 states and 261 transitions. [2022-03-19 10:22:39,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 10:22:39,559 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 92 [2022-03-19 10:22:39,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:22:39,560 INFO L225 Difference]: With dead ends: 224 [2022-03-19 10:22:39,560 INFO L226 Difference]: Without dead ends: 222 [2022-03-19 10:22:39,560 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 164 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-03-19 10:22:39,561 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 23 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:22:39,561 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 259 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 10:22:39,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-03-19 10:22:39,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2022-03-19 10:22:39,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 136 states have (on average 1.1029411764705883) internal successors, (150), 140 states have internal predecessors, (150), 55 states have call successors, (55), 31 states have call predecessors, (55), 30 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-03-19 10:22:39,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 259 transitions. [2022-03-19 10:22:39,607 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 259 transitions. Word has length 92 [2022-03-19 10:22:39,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:22:39,607 INFO L478 AbstractCegarLoop]: Abstraction has 222 states and 259 transitions. [2022-03-19 10:22:39,608 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-19 10:22:39,608 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 259 transitions. [2022-03-19 10:22:39,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-19 10:22:39,609 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:22:39,609 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:22:39,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 10:22:39,823 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-19 10:22:39,823 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:22:39,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:22:39,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1451786998, now seen corresponding path program 11 times [2022-03-19 10:22:39,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:22:39,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2123267642] [2022-03-19 10:22:39,824 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:22:39,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1451786998, now seen corresponding path program 12 times [2022-03-19 10:22:39,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:22:39,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643588159] [2022-03-19 10:22:39,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:22:39,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:22:39,830 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:22:39,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102826913] [2022-03-19 10:22:39,831 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:22:39,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:22:39,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:22:39,835 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:22:39,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 10:22:39,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 10:22:39,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:22:39,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-19 10:22:39,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:22:40,199 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:22:40,204 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:22:42,765 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 70 proven. 11 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-03-19 10:22:42,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:22:42,943 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:23:57,541 WARN L855 $PredicateComparison]: unable to prove that (forall ((v_main_~s~0_BEFORE_CALL_115 Int) (v_main_~r~0_BEFORE_CALL_121 Int) (v_main_~p~0_BEFORE_CALL_124 Int) (v_main_~q~0_BEFORE_CALL_121 Int)) (or (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_121 v_main_~q~0_BEFORE_CALL_121) 1))) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (= (mod .cse0 v_main_~p~0_BEFORE_CALL_124) 0) (= .cse0 0)))) (not (= (* v_main_~s~0_BEFORE_CALL_115 (+ v_main_~p~0_BEFORE_CALL_124 (* (- 1) v_main_~q~0_BEFORE_CALL_121))) (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_115) v_main_~r~0_BEFORE_CALL_121) v_main_~q~0_BEFORE_CALL_121) 1))))) is different from true [2022-03-19 10:25:00,701 WARN L855 $PredicateComparison]: unable to prove that (or (forall ((v_main_~s~0_BEFORE_CALL_115 Int) (v_main_~r~0_BEFORE_CALL_121 Int) (v_main_~p~0_BEFORE_CALL_124 Int) (v_main_~q~0_BEFORE_CALL_121 Int)) (or (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_121 v_main_~q~0_BEFORE_CALL_121) 1))) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (= (mod .cse0 v_main_~p~0_BEFORE_CALL_124) 0) (= .cse0 0)))) (not (= (* v_main_~s~0_BEFORE_CALL_115 (+ v_main_~p~0_BEFORE_CALL_124 (* (- 1) v_main_~q~0_BEFORE_CALL_121))) (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_115) v_main_~r~0_BEFORE_CALL_121) v_main_~q~0_BEFORE_CALL_121) 1))))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-03-19 10:25:18,746 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~s~0_BEFORE_CALL_115 Int) (v_main_~r~0_BEFORE_CALL_121 Int) (v_main_~p~0_BEFORE_CALL_124 Int) (v_main_~q~0_BEFORE_CALL_121 Int)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_121 v_main_~q~0_BEFORE_CALL_121) 1))) (or (not (= (* v_main_~s~0_BEFORE_CALL_115 (+ v_main_~p~0_BEFORE_CALL_124 (* (- 1) v_main_~q~0_BEFORE_CALL_121))) (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_115) v_main_~r~0_BEFORE_CALL_121) v_main_~q~0_BEFORE_CALL_121) 1))) (= (mod .cse0 v_main_~p~0_BEFORE_CALL_124) 0) (= .cse0 0))))) is different from true [2022-03-19 10:25:22,417 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 (= (+ (* c_main_~p~0 c_main_~x~0) (* c_main_~r~0 c_main_~y~0)) c_main_~a~0))) (and (or (not (= (mod (+ (- 1) (* c_main_~p~0 c_main_~r~0)) c_main_~r~0) 0)) (= c_main_~r~0 0) .cse0) (or (= c_main_~p~0 0) (forall ((main_~q~0 Int)) (not (= (mod (+ (* (+ (* (- 1) c_main_~p~0) main_~q~0) c_main_~r~0) 1) c_main_~p~0) 0))) .cse0))) is different from true [2022-03-19 10:25:22,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:25:22,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643588159] [2022-03-19 10:25:22,781 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:25:22,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102826913] [2022-03-19 10:25:22,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102826913] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:25:22,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:25:22,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-19 10:25:22,782 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:25:22,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2123267642] [2022-03-19 10:25:22,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2123267642] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:25:22,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:25:22,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 10:25:22,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230914691] [2022-03-19 10:25:22,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:25:22,783 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 10:25:22,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:25:22,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 10:25:22,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=168, Unknown=7, NotChecked=116, Total=342 [2022-03-19 10:25:22,783 INFO L87 Difference]: Start difference. First operand 222 states and 259 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-19 10:25:24,272 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:25:59,486 WARN L232 SmtUtils]: Spent 35.16s on a formula simplification. DAG size of input: 49 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 10:26:01,999 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:26:02,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:26:02,046 INFO L93 Difference]: Finished difference Result 254 states and 300 transitions. [2022-03-19 10:26:02,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 10:26:02,046 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 92 [2022-03-19 10:26:02,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:26:02,047 INFO L225 Difference]: With dead ends: 254 [2022-03-19 10:26:02,047 INFO L226 Difference]: Without dead ends: 252 [2022-03-19 10:26:02,048 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 50.5s TimeCoverageRelationStatistics Valid=71, Invalid=244, Unknown=7, NotChecked=140, Total=462 [2022-03-19 10:26:02,048 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 16 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:26:02,048 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 198 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 172 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2022-03-19 10:26:02,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-03-19 10:26:02,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 226. [2022-03-19 10:26:02,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 138 states have (on average 1.0942028985507246) internal successors, (151), 144 states have internal predecessors, (151), 56 states have call successors, (56), 32 states have call predecessors, (56), 31 states have return successors, (55), 49 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-19 10:26:02,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 262 transitions. [2022-03-19 10:26:02,078 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 262 transitions. Word has length 92 [2022-03-19 10:26:02,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:26:02,079 INFO L478 AbstractCegarLoop]: Abstraction has 226 states and 262 transitions. [2022-03-19 10:26:02,079 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-19 10:26:02,079 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 262 transitions. [2022-03-19 10:26:02,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-19 10:26:02,080 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:26:02,080 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:26:02,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 10:26:02,295 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-19 10:26:02,296 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:26:02,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:26:02,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1963826657, now seen corresponding path program 13 times [2022-03-19 10:26:02,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:26:02,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1257746520] [2022-03-19 10:26:02,297 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:26:02,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1963826657, now seen corresponding path program 14 times [2022-03-19 10:26:02,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:26:02,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644148660] [2022-03-19 10:26:02,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:26:02,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:26:02,302 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:26:02,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2008882147] [2022-03-19 10:26:02,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:26:02,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:26:02,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:26:02,304 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:26:02,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 10:26:02,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:26:02,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:26:02,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 10:26:02,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:26:10,165 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 45 proven. 37 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2022-03-19 10:26:10,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:26:11,404 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 53 proven. 29 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2022-03-19 10:26:11,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:26:11,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644148660] [2022-03-19 10:26:11,405 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:26:11,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008882147] [2022-03-19 10:26:11,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008882147] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:26:11,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:26:11,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2022-03-19 10:26:11,405 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:26:11,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1257746520] [2022-03-19 10:26:11,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1257746520] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:26:11,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:26:11,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 10:26:11,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681784203] [2022-03-19 10:26:11,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:26:11,406 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 10:26:11,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:26:11,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 10:26:11,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-03-19 10:26:11,407 INFO L87 Difference]: Start difference. First operand 226 states and 262 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-19 10:26:11,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:26:11,901 INFO L93 Difference]: Finished difference Result 248 states and 290 transitions. [2022-03-19 10:26:11,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 10:26:11,902 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 97 [2022-03-19 10:26:11,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:26:11,904 INFO L225 Difference]: With dead ends: 248 [2022-03-19 10:26:11,904 INFO L226 Difference]: Without dead ends: 246 [2022-03-19 10:26:11,904 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-03-19 10:26:11,905 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 12 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 10:26:11,905 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 301 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 296 Invalid, 0 Unknown, 6 Unchecked, 0.4s Time] [2022-03-19 10:26:11,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-03-19 10:26:11,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2022-03-19 10:26:11,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 150 states have (on average 1.1) internal successors, (165), 156 states have internal predecessors, (165), 62 states have call successors, (62), 34 states have call predecessors, (62), 33 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2022-03-19 10:26:11,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 288 transitions. [2022-03-19 10:26:11,946 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 288 transitions. Word has length 97 [2022-03-19 10:26:11,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:26:11,946 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 288 transitions. [2022-03-19 10:26:11,947 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-19 10:26:11,947 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 288 transitions. [2022-03-19 10:26:11,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-19 10:26:11,947 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:26:11,947 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:26:11,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-19 10:26:12,154 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 10:26:12,155 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:26:12,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:26:12,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1451182689, now seen corresponding path program 15 times [2022-03-19 10:26:12,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:26:12,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1356733279] [2022-03-19 10:26:12,156 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:26:12,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1451182689, now seen corresponding path program 16 times [2022-03-19 10:26:12,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:26:12,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801264780] [2022-03-19 10:26:12,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:26:12,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:26:12,162 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:26:12,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119611600] [2022-03-19 10:26:12,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:26:12,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:26:12,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:26:12,164 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:26:12,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 10:26:12,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:26:12,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:26:12,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-19 10:26:12,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:26:12,940 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 76 proven. 57 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-03-19 10:26:12,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:26:13,187 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 87 proven. 5 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-03-19 10:26:13,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:26:13,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801264780] [2022-03-19 10:26:13,188 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:26:13,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119611600] [2022-03-19 10:26:13,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119611600] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:26:13,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:26:13,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 19 [2022-03-19 10:26:13,188 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:26:13,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1356733279] [2022-03-19 10:26:13,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1356733279] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:26:13,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:26:13,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 10:26:13,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384806988] [2022-03-19 10:26:13,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:26:13,189 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 10:26:13,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:26:13,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 10:26:13,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-03-19 10:26:13,189 INFO L87 Difference]: Start difference. First operand 246 states and 288 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-19 10:26:13,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:26:13,790 INFO L93 Difference]: Finished difference Result 276 states and 322 transitions. [2022-03-19 10:26:13,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 10:26:13,791 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 97 [2022-03-19 10:26:13,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:26:13,792 INFO L225 Difference]: With dead ends: 276 [2022-03-19 10:26:13,792 INFO L226 Difference]: Without dead ends: 274 [2022-03-19 10:26:13,793 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 173 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-03-19 10:26:13,793 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 26 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 10:26:13,793 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 345 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 10:26:13,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-03-19 10:26:13,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 257. [2022-03-19 10:26:13,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 157 states have (on average 1.0955414012738853) internal successors, (172), 164 states have internal predecessors, (172), 64 states have call successors, (64), 36 states have call predecessors, (64), 35 states have return successors, (63), 56 states have call predecessors, (63), 63 states have call successors, (63) [2022-03-19 10:26:13,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 299 transitions. [2022-03-19 10:26:13,833 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 299 transitions. Word has length 97 [2022-03-19 10:26:13,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:26:13,833 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 299 transitions. [2022-03-19 10:26:13,833 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-19 10:26:13,833 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 299 transitions. [2022-03-19 10:26:13,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-19 10:26:13,834 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:26:13,834 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:26:13,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-19 10:26:14,054 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:26:14,054 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:26:14,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:26:14,054 INFO L85 PathProgramCache]: Analyzing trace with hash -792800609, now seen corresponding path program 5 times [2022-03-19 10:26:14,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:26:14,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1124946043] [2022-03-19 10:26:14,055 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:26:14,055 INFO L85 PathProgramCache]: Analyzing trace with hash -792800609, now seen corresponding path program 6 times [2022-03-19 10:26:14,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:26:14,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348589466] [2022-03-19 10:26:14,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:26:14,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:26:14,060 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:26:14,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [210920945] [2022-03-19 10:26:14,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:26:14,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:26:14,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:26:14,062 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:26:14,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 10:26:14,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 10:26:14,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:26:14,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 10:26:14,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:26:14,453 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 72 proven. 20 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-03-19 10:26:14,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:26:14,622 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:26:19,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:26:19,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348589466] [2022-03-19 10:26:19,313 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:26:19,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210920945] [2022-03-19 10:26:19,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210920945] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:26:19,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:26:19,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-19 10:26:19,313 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:26:19,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1124946043] [2022-03-19 10:26:19,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1124946043] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:26:19,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:26:19,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 10:26:19,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266201984] [2022-03-19 10:26:19,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:26:19,314 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 10:26:19,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:26:19,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 10:26:19,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=165, Unknown=2, NotChecked=0, Total=210 [2022-03-19 10:26:19,314 INFO L87 Difference]: Start difference. First operand 257 states and 299 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 10:26:19,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:26:19,462 INFO L93 Difference]: Finished difference Result 276 states and 322 transitions. [2022-03-19 10:26:19,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 10:26:19,462 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 97 [2022-03-19 10:26:19,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:26:19,464 INFO L225 Difference]: With dead ends: 276 [2022-03-19 10:26:19,464 INFO L226 Difference]: Without dead ends: 274 [2022-03-19 10:26:19,464 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=66, Invalid=238, Unknown=2, NotChecked=0, Total=306 [2022-03-19 10:26:19,465 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 19 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:26:19,465 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 159 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:26:19,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-03-19 10:26:19,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 241. [2022-03-19 10:26:19,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 149 states have (on average 1.0939597315436242) internal successors, (163), 154 states have internal predecessors, (163), 57 states have call successors, (57), 35 states have call predecessors, (57), 34 states have return successors, (56), 51 states have call predecessors, (56), 56 states have call successors, (56) [2022-03-19 10:26:19,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 276 transitions. [2022-03-19 10:26:19,510 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 276 transitions. Word has length 97 [2022-03-19 10:26:19,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:26:19,510 INFO L478 AbstractCegarLoop]: Abstraction has 241 states and 276 transitions. [2022-03-19 10:26:19,510 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 10:26:19,510 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 276 transitions. [2022-03-19 10:26:19,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-19 10:26:19,511 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:26:19,511 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:26:19,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-19 10:26:19,729 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:26:19,729 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:26:19,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:26:19,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1750450403, now seen corresponding path program 17 times [2022-03-19 10:26:19,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:26:19,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1005623978] [2022-03-19 10:26:19,731 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:26:19,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1750450403, now seen corresponding path program 18 times [2022-03-19 10:26:19,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:26:19,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691543218] [2022-03-19 10:26:19,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:26:19,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:26:19,744 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:26:19,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [862631012] [2022-03-19 10:26:19,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:26:19,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:26:19,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:26:19,746 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:26:19,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 10:26:20,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 10:26:20,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:26:20,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-19 10:26:20,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:26:40,336 WARN L232 SmtUtils]: Spent 12.02s on a formula simplification. DAG size of input: 43 DAG size of output: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 10:31:16,642 WARN L855 $PredicateComparison]: unable to prove that (exists ((aux_div_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95 Int) (aux_div_v_main_~p~0_BEFORE_CALL_174_45 Int) (aux_div_aux_mod_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_51_95_117_141 Int) (v_main_~x~0_BEFORE_CALL_204 Int) (aux_div_aux_mod_aux_mod_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95_117_69 Int) (aux_div_v_main_~r~0_BEFORE_CALL_171_51 Int) (aux_div_aux_mod_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95_117 Int) (aux_div_aux_mod_v_main_~r~0_BEFORE_CALL_171_51_95 Int) (aux_mod_aux_mod_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_51_95_117_141 Int) (v_main_~y~0_BEFORE_CALL_184 Int) (aux_div_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_51_95_117 Int)) (let ((.cse2 (* 2 aux_div_aux_mod_aux_mod_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95_117_69)) (.cse7 (* v_main_~x~0_BEFORE_CALL_204 aux_div_aux_mod_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95_117))) (let ((.cse4 (* 2 .cse7)) (.cse5 (* 2 (* v_main_~x~0_BEFORE_CALL_204 aux_div_aux_mod_aux_mod_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95_117_69))) (.cse0 (* aux_div_aux_mod_v_main_~r~0_BEFORE_CALL_171_51_95 2)) (.cse6 (* 2 aux_div_v_main_~p~0_BEFORE_CALL_174_45)) (.cse8 (* 2 aux_div_v_main_~r~0_BEFORE_CALL_171_51)) (.cse3 (+ .cse2 (* 2 aux_div_aux_mod_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95_117))) (.cse1 (+ (* aux_div_aux_mod_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_51_95_117_141 2) aux_mod_aux_mod_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_51_95_117_141))) (and (<= 0 aux_mod_aux_mod_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_51_95_117_141) (<= .cse0 .cse1) (<= 0 .cse2) (or (<= 1 |c___VERIFIER_assert_#in~cond|) (not (= (+ (* (+ (* (- 1) aux_mod_aux_mod_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_51_95_117_141) (* aux_div_aux_mod_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_51_95_117_141 (- 2)) 1) v_main_~y~0_BEFORE_CALL_184) (* (* v_main_~y~0_BEFORE_CALL_184 (div .cse1 2)) 2) (* 2 (* v_main_~x~0_BEFORE_CALL_204 (div .cse3 2)))) (+ .cse4 v_main_~y~0_BEFORE_CALL_184 .cse5)))) (<= .cse6 .cse3) (< (+ (* 2 (* aux_div_aux_mod_v_main_~r~0_BEFORE_CALL_171_51_95 v_main_~y~0_BEFORE_CALL_184)) .cse4 .cse5) v_main_~y~0_BEFORE_CALL_184) (< .cse1 (+ 2 .cse0)) (not (= (+ (* v_main_~y~0_BEFORE_CALL_184 aux_div_v_main_~r~0_BEFORE_CALL_171_51) .cse7) 0)) (< .cse1 (+ .cse8 2)) (< .cse3 (+ 2 .cse6)) (<= .cse8 .cse1) (< v_main_~y~0_BEFORE_CALL_184 v_main_~x~0_BEFORE_CALL_204) (< .cse3 (+ 2 (* 2 aux_div_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95))) (< .cse2 2) (< .cse1 (+ (* aux_div_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_51_95_117 2) 2)) (<= 0 (+ (* aux_div_v_main_~p~0_BEFORE_CALL_174_45 v_main_~x~0_BEFORE_CALL_204) (* aux_div_aux_mod_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_51_95_117_141 v_main_~y~0_BEFORE_CALL_184))) (= (+ (* (* aux_div_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_51_95_117 aux_div_aux_mod_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95_117) 2) aux_div_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95 (* (* aux_div_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_51_95_117 aux_div_aux_mod_aux_mod_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95_117_69) 2) 1) (+ (* (* aux_div_aux_mod_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_51_95_117_141 aux_div_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95) 2) (* aux_mod_aux_mod_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_51_95_117_141 aux_div_aux_mod_v_main_~p~0_BEFORE_CALL_174_45_95))) (< aux_mod_aux_mod_aux_mod_aux_mod_v_main_~r~0_BEFORE_CALL_171_51_95_117_141 2))))) is different from true [2022-03-19 10:31:58,486 WARN L232 SmtUtils]: Spent 5.85s on a formula simplification. DAG size of input: 14 DAG size of output: 1 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-03-19 10:32:30,467 WARN L232 SmtUtils]: Spent 5.83s on a formula simplification. DAG size of input: 14 DAG size of output: 1 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-03-19 10:34:14,526 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 91 proven. 44 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-03-19 10:34:14,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:34:26,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:34:26,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691543218] [2022-03-19 10:34:26,450 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:34:26,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862631012] [2022-03-19 10:34:26,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862631012] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:34:26,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:34:26,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-19 10:34:26,450 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:34:26,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1005623978] [2022-03-19 10:34:26,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1005623978] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:26,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:26,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 10:34:26,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619196906] [2022-03-19 10:34:26,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:34:26,451 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 10:34:26,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:26,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 10:34:26,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=314, Unknown=5, NotChecked=36, Total=420 [2022-03-19 10:34:26,451 INFO L87 Difference]: Start difference. First operand 241 states and 276 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 10:34:39,092 WARN L232 SmtUtils]: Spent 9.84s on a formula simplification. DAG size of input: 55 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 10:34:56,556 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:34:58,707 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:35:00,710 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:35:02,714 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:35:05,755 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:35:07,757 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:35:08,821 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:35:08,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:35:08,827 INFO L93 Difference]: Finished difference Result 256 states and 295 transitions. [2022-03-19 10:35:08,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 10:35:08,829 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 110 [2022-03-19 10:35:08,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:35:08,830 INFO L225 Difference]: With dead ends: 256 [2022-03-19 10:35:08,830 INFO L226 Difference]: Without dead ends: 254 [2022-03-19 10:35:08,831 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 56.7s TimeCoverageRelationStatistics Valid=85, Invalid=420, Unknown=5, NotChecked=42, Total=552 [2022-03-19 10:35:08,831 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 8 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 8 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:35:08,831 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 371 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 331 Invalid, 6 Unknown, 68 Unchecked, 16.3s Time] [2022-03-19 10:35:08,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-03-19 10:35:08,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 251. [2022-03-19 10:35:08,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 155 states have (on average 1.096774193548387) internal successors, (170), 160 states have internal predecessors, (170), 60 states have call successors, (60), 36 states have call predecessors, (60), 35 states have return successors, (59), 54 states have call predecessors, (59), 59 states have call successors, (59) [2022-03-19 10:35:08,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 289 transitions. [2022-03-19 10:35:08,873 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 289 transitions. Word has length 110 [2022-03-19 10:35:08,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:35:08,873 INFO L478 AbstractCegarLoop]: Abstraction has 251 states and 289 transitions. [2022-03-19 10:35:08,873 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 10:35:08,873 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 289 transitions. [2022-03-19 10:35:08,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-19 10:35:08,874 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:35:08,874 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:35:08,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-19 10:35:09,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-19 10:35:09,079 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:35:09,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:35:09,080 INFO L85 PathProgramCache]: Analyzing trace with hash 805225117, now seen corresponding path program 19 times [2022-03-19 10:35:09,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:09,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2092965872] [2022-03-19 10:35:09,080 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:35:09,080 INFO L85 PathProgramCache]: Analyzing trace with hash 805225117, now seen corresponding path program 20 times [2022-03-19 10:35:09,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:35:09,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683898038] [2022-03-19 10:35:09,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:35:09,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:35:09,085 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:35:09,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2100257328] [2022-03-19 10:35:09,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:35:09,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:35:09,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:35:09,091 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:35:09,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 10:35:09,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:35:09,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:35:09,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-19 10:35:09,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:35:11,000 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 61 proven. 58 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-03-19 10:35:11,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:35:13,412 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:35:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 70 proven. 40 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-03-19 10:35:13,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:35:13,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683898038] [2022-03-19 10:35:13,473 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:35:13,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100257328] [2022-03-19 10:35:13,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100257328] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:35:13,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:35:13,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 22 [2022-03-19 10:35:13,474 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:35:13,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2092965872] [2022-03-19 10:35:13,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2092965872] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:35:13,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:35:13,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 10:35:13,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102158680] [2022-03-19 10:35:13,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:35:13,474 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 10:35:13,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:13,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 10:35:13,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-03-19 10:35:13,475 INFO L87 Difference]: Start difference. First operand 251 states and 289 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-19 10:35:14,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:35:14,753 INFO L93 Difference]: Finished difference Result 277 states and 320 transitions. [2022-03-19 10:35:14,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 10:35:14,756 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 110 [2022-03-19 10:35:14,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:35:14,757 INFO L225 Difference]: With dead ends: 277 [2022-03-19 10:35:14,757 INFO L226 Difference]: Without dead ends: 275 [2022-03-19 10:35:14,757 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-03-19 10:35:14,758 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 23 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:35:14,758 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 333 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 10:35:14,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-03-19 10:35:14,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2022-03-19 10:35:14,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 170 states have (on average 1.1) internal successors, (187), 175 states have internal predecessors, (187), 66 states have call successors, (66), 39 states have call predecessors, (66), 38 states have return successors, (65), 60 states have call predecessors, (65), 65 states have call successors, (65) [2022-03-19 10:35:14,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 318 transitions. [2022-03-19 10:35:14,817 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 318 transitions. Word has length 110 [2022-03-19 10:35:14,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:35:14,817 INFO L478 AbstractCegarLoop]: Abstraction has 275 states and 318 transitions. [2022-03-19 10:35:14,817 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-19 10:35:14,817 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 318 transitions. [2022-03-19 10:35:14,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-19 10:35:14,818 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:35:14,818 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:35:14,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-19 10:35:15,035 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-19 10:35:15,035 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:35:15,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:35:15,035 INFO L85 PathProgramCache]: Analyzing trace with hash -2103538785, now seen corresponding path program 21 times [2022-03-19 10:35:15,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:15,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1072281614] [2022-03-19 10:35:15,036 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:35:15,036 INFO L85 PathProgramCache]: Analyzing trace with hash -2103538785, now seen corresponding path program 22 times [2022-03-19 10:35:15,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:35:15,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051194860] [2022-03-19 10:35:15,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:35:15,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:35:15,041 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:35:15,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1860630182] [2022-03-19 10:35:15,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:35:15,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:35:15,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:35:15,044 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:35:15,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 10:35:15,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:35:15,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:35:15,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-19 10:35:15,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:35:16,484 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 80 proven. 93 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2022-03-19 10:35:16,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:35:17,842 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 103 proven. 33 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-03-19 10:35:17,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:35:17,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051194860] [2022-03-19 10:35:17,842 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:35:17,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860630182] [2022-03-19 10:35:17,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860630182] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:35:17,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:35:17,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 24 [2022-03-19 10:35:17,843 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:35:17,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1072281614] [2022-03-19 10:35:17,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1072281614] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:35:17,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:35:17,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 10:35:17,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730053000] [2022-03-19 10:35:17,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:35:17,843 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 10:35:17,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:17,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 10:35:17,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:35:17,844 INFO L87 Difference]: Start difference. First operand 275 states and 318 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-19 10:35:18,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:35:18,895 INFO L93 Difference]: Finished difference Result 312 states and 360 transitions. [2022-03-19 10:35:18,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 10:35:18,897 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 8 states have call successors, (18) Word has length 110 [2022-03-19 10:35:18,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:35:18,898 INFO L225 Difference]: With dead ends: 312 [2022-03-19 10:35:18,898 INFO L226 Difference]: Without dead ends: 310 [2022-03-19 10:35:18,899 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 195 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-03-19 10:35:18,899 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 24 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 10:35:18,899 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 257 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 10:35:18,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-03-19 10:35:18,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 268. [2022-03-19 10:35:18,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 167 states have (on average 1.089820359281437) internal successors, (182), 172 states have internal predecessors, (182), 61 states have call successors, (61), 40 states have call predecessors, (61), 39 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2022-03-19 10:35:18,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 303 transitions. [2022-03-19 10:35:18,947 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 303 transitions. Word has length 110 [2022-03-19 10:35:18,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:35:18,948 INFO L478 AbstractCegarLoop]: Abstraction has 268 states and 303 transitions. [2022-03-19 10:35:18,948 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-19 10:35:18,948 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 303 transitions. [2022-03-19 10:35:18,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-19 10:35:18,948 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:35:18,949 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:35:18,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-19 10:35:19,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:35:19,176 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:35:19,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:35:19,176 INFO L85 PathProgramCache]: Analyzing trace with hash -527866339, now seen corresponding path program 23 times [2022-03-19 10:35:19,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:19,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1314094187] [2022-03-19 10:35:19,179 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:35:19,179 INFO L85 PathProgramCache]: Analyzing trace with hash -527866339, now seen corresponding path program 24 times [2022-03-19 10:35:19,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:35:19,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032698060] [2022-03-19 10:35:19,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:35:19,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:35:19,186 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:35:19,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1350533491] [2022-03-19 10:35:19,187 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:35:19,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:35:19,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:35:19,188 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:35:19,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 10:35:19,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 10:35:19,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:35:19,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 10:35:19,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:35:20,048 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 67 proven. 40 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2022-03-19 10:35:20,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:35:20,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:35:20,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032698060] [2022-03-19 10:35:20,196 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:35:20,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350533491] [2022-03-19 10:35:20,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350533491] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:35:20,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:35:20,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-19 10:35:20,196 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:35:20,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1314094187] [2022-03-19 10:35:20,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1314094187] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:35:20,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:35:20,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 10:35:20,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724784378] [2022-03-19 10:35:20,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:35:20,197 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 10:35:20,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:20,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 10:35:20,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-19 10:35:20,198 INFO L87 Difference]: Start difference. First operand 268 states and 303 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-19 10:35:20,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:35:20,688 INFO L93 Difference]: Finished difference Result 316 states and 363 transitions. [2022-03-19 10:35:20,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 10:35:20,688 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 110 [2022-03-19 10:35:20,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:35:20,689 INFO L225 Difference]: With dead ends: 316 [2022-03-19 10:35:20,689 INFO L226 Difference]: Without dead ends: 314 [2022-03-19 10:35:20,690 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-19 10:35:20,690 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 25 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:35:20,690 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 193 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 10:35:20,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-03-19 10:35:20,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 282. [2022-03-19 10:35:20,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 176 states have (on average 1.0909090909090908) internal successors, (192), 181 states have internal predecessors, (192), 64 states have call successors, (64), 42 states have call predecessors, (64), 41 states have return successors, (63), 58 states have call predecessors, (63), 63 states have call successors, (63) [2022-03-19 10:35:20,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 319 transitions. [2022-03-19 10:35:20,745 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 319 transitions. Word has length 110 [2022-03-19 10:35:20,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:35:20,746 INFO L478 AbstractCegarLoop]: Abstraction has 282 states and 319 transitions. [2022-03-19 10:35:20,746 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-19 10:35:20,746 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 319 transitions. [2022-03-19 10:35:20,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-19 10:35:20,746 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:35:20,746 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:35:20,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-19 10:35:20,952 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:35:20,952 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:35:20,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:35:20,952 INFO L85 PathProgramCache]: Analyzing trace with hash 858337055, now seen corresponding path program 25 times [2022-03-19 10:35:20,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:20,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1992110343] [2022-03-19 10:35:20,953 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:35:20,953 INFO L85 PathProgramCache]: Analyzing trace with hash 858337055, now seen corresponding path program 26 times [2022-03-19 10:35:20,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:35:20,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060983608] [2022-03-19 10:35:20,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:35:20,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:35:20,959 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:35:20,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [640788471] [2022-03-19 10:35:20,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:35:20,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:35:20,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:35:20,961 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:35:20,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-19 10:35:21,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:35:21,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:35:21,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-19 10:35:21,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:35:21,579 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 31 proven. 79 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-03-19 10:35:21,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:35:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 42 proven. 68 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-03-19 10:35:22,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:35:22,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060983608] [2022-03-19 10:35:22,621 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:35:22,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640788471] [2022-03-19 10:35:22,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640788471] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:35:22,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:35:22,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-03-19 10:35:22,622 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:35:22,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1992110343] [2022-03-19 10:35:22,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1992110343] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:35:22,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:35:22,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 10:35:22,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336945578] [2022-03-19 10:35:22,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:35:22,622 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 10:35:22,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:22,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 10:35:22,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-03-19 10:35:22,623 INFO L87 Difference]: Start difference. First operand 282 states and 319 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-03-19 10:35:23,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:35:23,472 INFO L93 Difference]: Finished difference Result 306 states and 350 transitions. [2022-03-19 10:35:23,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 10:35:23,473 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 110 [2022-03-19 10:35:23,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:35:23,474 INFO L225 Difference]: With dead ends: 306 [2022-03-19 10:35:23,474 INFO L226 Difference]: Without dead ends: 304 [2022-03-19 10:35:23,474 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-03-19 10:35:23,476 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 15 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 10:35:23,476 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 419 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 10:35:23,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-03-19 10:35:23,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 272. [2022-03-19 10:35:23,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 170 states have (on average 1.0941176470588236) internal successors, (186), 175 states have internal predecessors, (186), 62 states have call successors, (62), 40 states have call predecessors, (62), 39 states have return successors, (61), 56 states have call predecessors, (61), 61 states have call successors, (61) [2022-03-19 10:35:23,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 309 transitions. [2022-03-19 10:35:23,542 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 309 transitions. Word has length 110 [2022-03-19 10:35:23,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:35:23,542 INFO L478 AbstractCegarLoop]: Abstraction has 272 states and 309 transitions. [2022-03-19 10:35:23,542 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-03-19 10:35:23,542 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 309 transitions. [2022-03-19 10:35:23,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-19 10:35:23,543 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:35:23,543 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:35:23,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-19 10:35:23,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-19 10:35:23,760 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:35:23,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:35:23,760 INFO L85 PathProgramCache]: Analyzing trace with hash -880954721, now seen corresponding path program 27 times [2022-03-19 10:35:23,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:23,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [669335744] [2022-03-19 10:35:23,760 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:35:23,760 INFO L85 PathProgramCache]: Analyzing trace with hash -880954721, now seen corresponding path program 28 times [2022-03-19 10:35:23,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:35:23,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102266583] [2022-03-19 10:35:23,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:35:23,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:35:23,765 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:35:23,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [887933819] [2022-03-19 10:35:23,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:35:23,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:35:23,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:35:23,767 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:35:23,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-19 10:35:23,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:35:23,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:35:23,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-19 10:35:23,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:35:24,605 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 103 proven. 79 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2022-03-19 10:35:24,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:35:24,836 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 105 proven. 8 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-03-19 10:35:24,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:35:24,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102266583] [2022-03-19 10:35:24,836 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:35:24,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887933819] [2022-03-19 10:35:24,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887933819] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:35:24,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:35:24,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-03-19 10:35:24,837 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:35:24,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [669335744] [2022-03-19 10:35:24,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [669335744] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:35:24,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:35:24,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 10:35:24,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992235850] [2022-03-19 10:35:24,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:35:24,837 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 10:35:24,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:24,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 10:35:24,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-03-19 10:35:24,838 INFO L87 Difference]: Start difference. First operand 272 states and 309 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-03-19 10:35:25,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:35:25,350 INFO L93 Difference]: Finished difference Result 322 states and 369 transitions. [2022-03-19 10:35:25,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 10:35:25,350 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 110 [2022-03-19 10:35:25,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:35:25,352 INFO L225 Difference]: With dead ends: 322 [2022-03-19 10:35:25,352 INFO L226 Difference]: Without dead ends: 320 [2022-03-19 10:35:25,352 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 201 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-03-19 10:35:25,353 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 12 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 10:35:25,354 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 356 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 10:35:25,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-03-19 10:35:25,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 288. [2022-03-19 10:35:25,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 180 states have (on average 1.0944444444444446) internal successors, (197), 186 states have internal predecessors, (197), 66 states have call successors, (66), 42 states have call predecessors, (66), 41 states have return successors, (65), 59 states have call predecessors, (65), 65 states have call successors, (65) [2022-03-19 10:35:25,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 328 transitions. [2022-03-19 10:35:25,423 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 328 transitions. Word has length 110 [2022-03-19 10:35:25,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:35:25,423 INFO L478 AbstractCegarLoop]: Abstraction has 288 states and 328 transitions. [2022-03-19 10:35:25,423 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-03-19 10:35:25,423 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 328 transitions. [2022-03-19 10:35:25,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-19 10:35:25,425 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:35:25,425 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:35:25,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-19 10:35:25,637 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-19 10:35:25,637 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:35:25,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:35:25,637 INFO L85 PathProgramCache]: Analyzing trace with hash 769627864, now seen corresponding path program 29 times [2022-03-19 10:35:25,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:25,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1111464365] [2022-03-19 10:35:25,638 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:35:25,638 INFO L85 PathProgramCache]: Analyzing trace with hash 769627864, now seen corresponding path program 30 times [2022-03-19 10:35:25,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:35:25,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737315789] [2022-03-19 10:35:25,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:35:25,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:35:25,653 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:35:25,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [36808063] [2022-03-19 10:35:25,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:35:25,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:35:25,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:35:25,659 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:35:25,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-19 10:35:25,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 10:35:25,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:35:25,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-19 10:35:25,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:35:29,443 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 95 proven. 39 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2022-03-19 10:35:29,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:35:34,633 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-03-19 10:35:34,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:35:34,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737315789] [2022-03-19 10:35:34,634 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:35:34,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36808063] [2022-03-19 10:35:34,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36808063] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:35:34,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:35:34,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-03-19 10:35:34,634 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:35:34,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1111464365] [2022-03-19 10:35:34,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1111464365] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:35:34,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:35:34,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 10:35:34,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062230516] [2022-03-19 10:35:34,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:35:34,635 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 10:35:34,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:34,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 10:35:34,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=140, Unknown=3, NotChecked=0, Total=182 [2022-03-19 10:35:34,636 INFO L87 Difference]: Start difference. First operand 288 states and 328 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-19 10:35:36,773 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:35:38,780 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:35:40,859 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:35:53,033 WARN L232 SmtUtils]: Spent 12.04s on a formula simplification. DAG size of input: 46 DAG size of output: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 10:35:55,638 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:35:55,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:35:55,707 INFO L93 Difference]: Finished difference Result 346 states and 402 transitions. [2022-03-19 10:35:55,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 10:35:55,708 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 115 [2022-03-19 10:35:55,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:35:55,716 INFO L225 Difference]: With dead ends: 346 [2022-03-19 10:35:55,716 INFO L226 Difference]: Without dead ends: 344 [2022-03-19 10:35:55,716 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 215 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=58, Invalid=211, Unknown=3, NotChecked=0, Total=272 [2022-03-19 10:35:55,717 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 18 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 13 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-03-19 10:35:55,717 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 231 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 230 Invalid, 4 Unknown, 0 Unchecked, 8.8s Time] [2022-03-19 10:35:55,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-03-19 10:35:55,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 310. [2022-03-19 10:35:55,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 193 states have (on average 1.0932642487046633) internal successors, (211), 200 states have internal predecessors, (211), 72 states have call successors, (72), 45 states have call predecessors, (72), 44 states have return successors, (71), 64 states have call predecessors, (71), 71 states have call successors, (71) [2022-03-19 10:35:55,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 354 transitions. [2022-03-19 10:35:55,795 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 354 transitions. Word has length 115 [2022-03-19 10:35:55,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:35:55,795 INFO L478 AbstractCegarLoop]: Abstraction has 310 states and 354 transitions. [2022-03-19 10:35:55,795 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-19 10:35:55,795 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 354 transitions. [2022-03-19 10:35:55,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-19 10:35:55,796 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:35:55,796 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:35:55,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-19 10:35:56,004 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-19 10:35:56,004 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:35:56,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:35:56,005 INFO L85 PathProgramCache]: Analyzing trace with hash 256983896, now seen corresponding path program 31 times [2022-03-19 10:35:56,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:56,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1622237089] [2022-03-19 10:35:56,005 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:35:56,005 INFO L85 PathProgramCache]: Analyzing trace with hash 256983896, now seen corresponding path program 32 times [2022-03-19 10:35:56,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:35:56,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308020987] [2022-03-19 10:35:56,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:35:56,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:35:56,027 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:35:56,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135785428] [2022-03-19 10:35:56,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:35:56,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:35:56,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:35:56,030 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:35:56,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-19 10:35:56,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:35:56,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:35:56,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-19 10:35:56,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:35:56,849 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 109 proven. 70 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-03-19 10:35:56,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:35:57,092 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-03-19 10:35:57,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:35:57,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308020987] [2022-03-19 10:35:57,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:35:57,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135785428] [2022-03-19 10:35:57,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135785428] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:35:57,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:35:57,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2022-03-19 10:35:57,093 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:35:57,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1622237089] [2022-03-19 10:35:57,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1622237089] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:35:57,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:35:57,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 10:35:57,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685004870] [2022-03-19 10:35:57,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:35:57,094 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 10:35:57,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:57,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 10:35:57,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-19 10:35:57,095 INFO L87 Difference]: Start difference. First operand 310 states and 354 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-19 10:35:57,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:35:57,867 INFO L93 Difference]: Finished difference Result 336 states and 385 transitions. [2022-03-19 10:35:57,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 10:35:57,867 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 115 [2022-03-19 10:35:57,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:35:57,868 INFO L225 Difference]: With dead ends: 336 [2022-03-19 10:35:57,868 INFO L226 Difference]: Without dead ends: 334 [2022-03-19 10:35:57,869 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 212 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-03-19 10:35:57,869 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 16 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 10:35:57,869 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 370 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 10:35:57,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-03-19 10:35:57,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 334. [2022-03-19 10:35:57,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 208 states have (on average 1.0961538461538463) internal successors, (228), 215 states have internal predecessors, (228), 78 states have call successors, (78), 48 states have call predecessors, (78), 47 states have return successors, (77), 70 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-19 10:35:57,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 383 transitions. [2022-03-19 10:35:57,950 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 383 transitions. Word has length 115 [2022-03-19 10:35:57,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:35:57,950 INFO L478 AbstractCegarLoop]: Abstraction has 334 states and 383 transitions. [2022-03-19 10:35:57,950 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-19 10:35:57,950 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 383 transitions. [2022-03-19 10:35:57,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-19 10:35:57,951 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:35:57,951 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:35:57,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-19 10:35:58,167 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-19 10:35:58,167 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:35:58,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:35:58,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1986999402, now seen corresponding path program 33 times [2022-03-19 10:35:58,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:58,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1263305546] [2022-03-19 10:35:58,168 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:35:58,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1986999402, now seen corresponding path program 34 times [2022-03-19 10:35:58,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:35:58,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636888080] [2022-03-19 10:35:58,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:35:58,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:35:58,173 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:35:58,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [486426536] [2022-03-19 10:35:58,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:35:58,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:35:58,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:35:58,174 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:35:58,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-19 10:35:58,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:35:58,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:35:58,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-19 10:35:58,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:35:58,917 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 102 proven. 107 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-19 10:35:58,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:35:59,234 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-03-19 10:35:59,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:35:59,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636888080] [2022-03-19 10:35:59,234 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:35:59,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486426536] [2022-03-19 10:35:59,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486426536] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:35:59,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:35:59,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 21 [2022-03-19 10:35:59,235 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:35:59,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1263305546] [2022-03-19 10:35:59,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1263305546] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:35:59,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:35:59,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 10:35:59,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590165564] [2022-03-19 10:35:59,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:35:59,235 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 10:35:59,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:59,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 10:35:59,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-03-19 10:35:59,236 INFO L87 Difference]: Start difference. First operand 334 states and 383 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-19 10:35:59,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:35:59,983 INFO L93 Difference]: Finished difference Result 380 states and 433 transitions. [2022-03-19 10:35:59,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 10:35:59,983 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 115 [2022-03-19 10:35:59,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:35:59,985 INFO L225 Difference]: With dead ends: 380 [2022-03-19 10:35:59,985 INFO L226 Difference]: Without dead ends: 378 [2022-03-19 10:35:59,985 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 207 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:35:59,985 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 28 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 10:35:59,985 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 296 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 10:35:59,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-03-19 10:36:00,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 356. [2022-03-19 10:36:00,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 223 states have (on average 1.094170403587444) internal successors, (244), 230 states have internal predecessors, (244), 81 states have call successors, (81), 52 states have call predecessors, (81), 51 states have return successors, (80), 73 states have call predecessors, (80), 80 states have call successors, (80) [2022-03-19 10:36:00,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 405 transitions. [2022-03-19 10:36:00,074 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 405 transitions. Word has length 115 [2022-03-19 10:36:00,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:36:00,074 INFO L478 AbstractCegarLoop]: Abstraction has 356 states and 405 transitions. [2022-03-19 10:36:00,074 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-19 10:36:00,074 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 405 transitions. [2022-03-19 10:36:00,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-19 10:36:00,075 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:36:00,075 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:36:00,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-19 10:36:00,289 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-19 10:36:00,289 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:36:00,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:36:00,289 INFO L85 PathProgramCache]: Analyzing trace with hash 627101656, now seen corresponding path program 35 times [2022-03-19 10:36:00,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:36:00,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [29051282] [2022-03-19 10:36:00,290 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:36:00,290 INFO L85 PathProgramCache]: Analyzing trace with hash 627101656, now seen corresponding path program 36 times [2022-03-19 10:36:00,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:36:00,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37051218] [2022-03-19 10:36:00,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:36:00,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:36:00,295 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:36:00,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2071581130] [2022-03-19 10:36:00,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:36:00,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:36:00,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:36:00,312 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:36:00,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-19 10:36:00,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 10:36:00,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:36:00,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 10:36:00,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:36:00,677 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 99 proven. 39 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-03-19 10:36:00,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:36:02,948 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-03-19 10:36:02,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:36:02,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37051218] [2022-03-19 10:36:02,949 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:36:02,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071581130] [2022-03-19 10:36:02,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071581130] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:36:02,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:36:02,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-03-19 10:36:02,949 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:36:02,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [29051282] [2022-03-19 10:36:02,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [29051282] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:36:02,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:36:02,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 10:36:02,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802073924] [2022-03-19 10:36:02,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:36:02,950 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 10:36:02,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:36:02,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 10:36:02,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=144, Unknown=1, NotChecked=0, Total=182 [2022-03-19 10:36:02,950 INFO L87 Difference]: Start difference. First operand 356 states and 405 transitions. Second operand has 11 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2022-03-19 10:36:03,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:36:03,290 INFO L93 Difference]: Finished difference Result 372 states and 424 transitions. [2022-03-19 10:36:03,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 10:36:03,291 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) Word has length 115 [2022-03-19 10:36:03,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:36:03,302 INFO L225 Difference]: With dead ends: 372 [2022-03-19 10:36:03,302 INFO L226 Difference]: Without dead ends: 370 [2022-03-19 10:36:03,302 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 215 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=56, Invalid=215, Unknown=1, NotChecked=0, Total=272 [2022-03-19 10:36:03,302 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 15 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:36:03,302 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 252 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 162 Invalid, 0 Unknown, 28 Unchecked, 0.2s Time] [2022-03-19 10:36:03,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-03-19 10:36:03,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 364. [2022-03-19 10:36:03,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 227 states have (on average 1.092511013215859) internal successors, (248), 235 states have internal predecessors, (248), 84 states have call successors, (84), 53 states have call predecessors, (84), 52 states have return successors, (83), 75 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-19 10:36:03,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 415 transitions. [2022-03-19 10:36:03,395 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 415 transitions. Word has length 115 [2022-03-19 10:36:03,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:36:03,395 INFO L478 AbstractCegarLoop]: Abstraction has 364 states and 415 transitions. [2022-03-19 10:36:03,395 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2022-03-19 10:36:03,395 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 415 transitions. [2022-03-19 10:36:03,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-19 10:36:03,396 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:36:03,396 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:36:03,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-19 10:36:03,609 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:36:03,609 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:36:03,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:36:03,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1616881642, now seen corresponding path program 37 times [2022-03-19 10:36:03,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:36:03,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1141827394] [2022-03-19 10:36:03,610 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:36:03,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1616881642, now seen corresponding path program 38 times [2022-03-19 10:36:03,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:36:03,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802658800] [2022-03-19 10:36:03,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:36:03,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:36:03,615 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:36:03,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [984655407] [2022-03-19 10:36:03,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:36:03,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:36:03,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:36:03,620 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:36:03,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-19 10:36:03,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:36:03,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:36:03,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-19 10:36:03,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:36:05,208 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 112 proven. 67 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-03-19 10:36:05,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:36:05,931 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-03-19 10:36:05,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:36:05,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802658800] [2022-03-19 10:36:05,931 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:36:05,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984655407] [2022-03-19 10:36:05,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984655407] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:36:05,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:36:05,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 17 [2022-03-19 10:36:05,932 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:36:05,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1141827394] [2022-03-19 10:36:05,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1141827394] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:36:05,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:36:05,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 10:36:05,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748040055] [2022-03-19 10:36:05,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:36:05,932 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 10:36:05,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:36:05,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 10:36:05,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-03-19 10:36:05,933 INFO L87 Difference]: Start difference. First operand 364 states and 415 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-19 10:36:07,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:36:07,848 INFO L93 Difference]: Finished difference Result 396 states and 456 transitions. [2022-03-19 10:36:07,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 10:36:07,849 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) Word has length 115 [2022-03-19 10:36:07,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:36:07,850 INFO L225 Difference]: With dead ends: 396 [2022-03-19 10:36:07,850 INFO L226 Difference]: Without dead ends: 394 [2022-03-19 10:36:07,850 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 211 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-03-19 10:36:07,851 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 16 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-19 10:36:07,851 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 332 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 380 Invalid, 0 Unknown, 10 Unchecked, 1.7s Time] [2022-03-19 10:36:07,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-03-19 10:36:07,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 371. [2022-03-19 10:36:07,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 230 states have (on average 1.0956521739130434) internal successors, (252), 238 states have internal predecessors, (252), 88 states have call successors, (88), 53 states have call predecessors, (88), 52 states have return successors, (87), 79 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-19 10:36:07,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 427 transitions. [2022-03-19 10:36:07,966 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 427 transitions. Word has length 115 [2022-03-19 10:36:07,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:36:07,966 INFO L478 AbstractCegarLoop]: Abstraction has 371 states and 427 transitions. [2022-03-19 10:36:07,966 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-19 10:36:07,966 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 427 transitions. [2022-03-19 10:36:07,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-19 10:36:07,967 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:36:07,967 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:36:07,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-19 10:36:08,182 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-19 10:36:08,182 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:36:08,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:36:08,183 INFO L85 PathProgramCache]: Analyzing trace with hash -2129525610, now seen corresponding path program 39 times [2022-03-19 10:36:08,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:36:08,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2014559494] [2022-03-19 10:36:08,183 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:36:08,183 INFO L85 PathProgramCache]: Analyzing trace with hash -2129525610, now seen corresponding path program 40 times [2022-03-19 10:36:08,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:36:08,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756162037] [2022-03-19 10:36:08,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:36:08,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:36:08,188 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:36:08,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999659851] [2022-03-19 10:36:08,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:36:08,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:36:08,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:36:08,191 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:36:08,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-19 10:36:08,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:36:08,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:36:08,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-19 10:36:08,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:36:12,711 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 95 proven. 57 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-19 10:36:12,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:36:13,207 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-03-19 10:36:13,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:36:13,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756162037] [2022-03-19 10:36:13,207 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:36:13,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999659851] [2022-03-19 10:36:13,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999659851] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:36:13,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:36:13,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 21 [2022-03-19 10:36:13,208 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:36:13,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2014559494] [2022-03-19 10:36:13,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2014559494] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:36:13,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:36:13,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 10:36:13,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462995757] [2022-03-19 10:36:13,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:36:13,208 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 10:36:13,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:36:13,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 10:36:13,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-03-19 10:36:13,209 INFO L87 Difference]: Start difference. First operand 371 states and 427 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-19 10:36:15,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:36:15,071 INFO L93 Difference]: Finished difference Result 401 states and 463 transitions. [2022-03-19 10:36:15,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 10:36:15,071 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) Word has length 115 [2022-03-19 10:36:15,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:36:15,073 INFO L225 Difference]: With dead ends: 401 [2022-03-19 10:36:15,073 INFO L226 Difference]: Without dead ends: 399 [2022-03-19 10:36:15,073 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 209 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-03-19 10:36:15,073 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 17 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-19 10:36:15,073 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 451 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 503 Invalid, 0 Unknown, 16 Unchecked, 1.6s Time] [2022-03-19 10:36:15,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-03-19 10:36:15,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 367. [2022-03-19 10:36:15,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 228 states have (on average 1.0921052631578947) internal successors, (249), 237 states have internal predecessors, (249), 86 states have call successors, (86), 53 states have call predecessors, (86), 52 states have return successors, (85), 76 states have call predecessors, (85), 85 states have call successors, (85) [2022-03-19 10:36:15,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 420 transitions. [2022-03-19 10:36:15,174 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 420 transitions. Word has length 115 [2022-03-19 10:36:15,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:36:15,174 INFO L478 AbstractCegarLoop]: Abstraction has 367 states and 420 transitions. [2022-03-19 10:36:15,174 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-19 10:36:15,174 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 420 transitions. [2022-03-19 10:36:15,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-19 10:36:15,175 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:36:15,175 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:36:15,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-19 10:36:15,393 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:36:15,394 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:36:15,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:36:15,394 INFO L85 PathProgramCache]: Analyzing trace with hash -618835194, now seen corresponding path program 41 times [2022-03-19 10:36:15,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:36:15,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [948088128] [2022-03-19 10:36:15,395 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:36:15,395 INFO L85 PathProgramCache]: Analyzing trace with hash -618835194, now seen corresponding path program 42 times [2022-03-19 10:36:15,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:36:15,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223466805] [2022-03-19 10:36:15,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:36:15,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:36:15,417 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:36:15,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817654857] [2022-03-19 10:36:15,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:36:15,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:36:15,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:36:15,418 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:36:15,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-19 10:36:15,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 10:36:15,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:36:15,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 10:36:15,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:36:16,477 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 138 proven. 35 refuted. 0 times theorem prover too weak. 438 trivial. 0 not checked. [2022-03-19 10:36:16,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:36:16,763 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 135 proven. 8 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-03-19 10:36:16,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:36:16,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223466805] [2022-03-19 10:36:16,763 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:36:16,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817654857] [2022-03-19 10:36:16,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817654857] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:36:16,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:36:16,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2022-03-19 10:36:16,764 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:36:16,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [948088128] [2022-03-19 10:36:16,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [948088128] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:36:16,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:36:16,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 10:36:16,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191878572] [2022-03-19 10:36:16,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:36:16,764 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 10:36:16,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:36:16,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 10:36:16,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-03-19 10:36:16,765 INFO L87 Difference]: Start difference. First operand 367 states and 420 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2022-03-19 10:36:18,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:36:18,057 INFO L93 Difference]: Finished difference Result 438 states and 508 transitions. [2022-03-19 10:36:18,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 10:36:18,058 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) Word has length 128 [2022-03-19 10:36:18,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:36:18,058 INFO L225 Difference]: With dead ends: 438 [2022-03-19 10:36:18,059 INFO L226 Difference]: Without dead ends: 222 [2022-03-19 10:36:18,059 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 238 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-03-19 10:36:18,060 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 23 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 10:36:18,060 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 166 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 10:36:18,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-03-19 10:36:18,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 202. [2022-03-19 10:36:18,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 126 states have (on average 1.0873015873015872) internal successors, (137), 129 states have internal predecessors, (137), 46 states have call successors, (46), 30 states have call predecessors, (46), 29 states have return successors, (45), 42 states have call predecessors, (45), 45 states have call successors, (45) [2022-03-19 10:36:18,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 228 transitions. [2022-03-19 10:36:18,119 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 228 transitions. Word has length 128 [2022-03-19 10:36:18,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:36:18,119 INFO L478 AbstractCegarLoop]: Abstraction has 202 states and 228 transitions. [2022-03-19 10:36:18,119 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2022-03-19 10:36:18,120 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 228 transitions. [2022-03-19 10:36:18,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-19 10:36:18,120 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:36:18,120 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:36:18,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-19 10:36:18,325 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:36:18,326 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:36:18,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:36:18,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1849654520, now seen corresponding path program 43 times [2022-03-19 10:36:18,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:36:18,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1980603025] [2022-03-19 10:36:18,326 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:36:18,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1849654520, now seen corresponding path program 44 times [2022-03-19 10:36:18,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:36:18,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167170312] [2022-03-19 10:36:18,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:36:18,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:36:18,334 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:36:18,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1287832162] [2022-03-19 10:36:18,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:36:18,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:36:18,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:36:18,338 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:36:18,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-19 10:36:18,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:36:18,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:36:18,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-19 10:36:18,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:36:20,818 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 90 proven. 101 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-19 10:36:20,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:36:21,595 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 143 proven. 36 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2022-03-19 10:36:21,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:36:21,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167170312] [2022-03-19 10:36:21,596 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:36:21,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287832162] [2022-03-19 10:36:21,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287832162] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:36:21,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:36:21,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2022-03-19 10:36:21,596 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:36:21,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1980603025] [2022-03-19 10:36:21,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1980603025] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:36:21,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:36:21,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 10:36:21,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523952305] [2022-03-19 10:36:21,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:36:21,597 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 10:36:21,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:36:21,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 10:36:21,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2022-03-19 10:36:21,597 INFO L87 Difference]: Start difference. First operand 202 states and 228 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-19 10:36:22,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:36:22,865 INFO L93 Difference]: Finished difference Result 250 states and 285 transitions. [2022-03-19 10:36:22,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 10:36:22,865 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 128 [2022-03-19 10:36:22,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:36:22,866 INFO L225 Difference]: With dead ends: 250 [2022-03-19 10:36:22,866 INFO L226 Difference]: Without dead ends: 248 [2022-03-19 10:36:22,866 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 234 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2022-03-19 10:36:22,867 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 14 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:36:22,869 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 447 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-19 10:36:22,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-03-19 10:36:22,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 237. [2022-03-19 10:36:22,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 148 states have (on average 1.087837837837838) internal successors, (161), 152 states have internal predecessors, (161), 54 states have call successors, (54), 35 states have call predecessors, (54), 34 states have return successors, (53), 49 states have call predecessors, (53), 53 states have call successors, (53) [2022-03-19 10:36:22,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 268 transitions. [2022-03-19 10:36:22,993 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 268 transitions. Word has length 128 [2022-03-19 10:36:22,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:36:22,993 INFO L478 AbstractCegarLoop]: Abstraction has 237 states and 268 transitions. [2022-03-19 10:36:22,993 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-19 10:36:22,993 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 268 transitions. [2022-03-19 10:36:22,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-19 10:36:22,994 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:36:22,994 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:36:23,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-19 10:36:23,198 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-19 10:36:23,198 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:36:23,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:36:23,198 INFO L85 PathProgramCache]: Analyzing trace with hash 706021000, now seen corresponding path program 45 times [2022-03-19 10:36:23,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:36:23,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [977071704] [2022-03-19 10:36:23,199 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:36:23,199 INFO L85 PathProgramCache]: Analyzing trace with hash 706021000, now seen corresponding path program 46 times [2022-03-19 10:36:23,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:36:23,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637409279] [2022-03-19 10:36:23,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:36:23,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:36:23,204 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:36:23,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [482449455] [2022-03-19 10:36:23,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:36:23,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:36:23,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:36:23,205 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:36:23,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-19 10:36:23,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:36:23,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:36:23,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 90 conjunts are in the unsatisfiable core [2022-03-19 10:36:23,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:36:24,286 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 140 proven. 156 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-03-19 10:36:24,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:36:24,712 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 135 proven. 8 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-03-19 10:36:24,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:36:24,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637409279] [2022-03-19 10:36:24,712 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:36:24,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482449455] [2022-03-19 10:36:24,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482449455] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:36:24,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:36:24,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 21 [2022-03-19 10:36:24,713 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:36:24,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [977071704] [2022-03-19 10:36:24,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [977071704] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:36:24,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:36:24,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 10:36:24,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598269599] [2022-03-19 10:36:24,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:36:24,714 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 10:36:24,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:36:24,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 10:36:24,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-03-19 10:36:24,714 INFO L87 Difference]: Start difference. First operand 237 states and 268 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-19 10:36:25,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:36:25,318 INFO L93 Difference]: Finished difference Result 289 states and 328 transitions. [2022-03-19 10:36:25,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 10:36:25,319 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 128 [2022-03-19 10:36:25,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:36:25,320 INFO L225 Difference]: With dead ends: 289 [2022-03-19 10:36:25,320 INFO L226 Difference]: Without dead ends: 287 [2022-03-19 10:36:25,320 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 230 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:36:25,320 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 10:36:25,321 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 304 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 10:36:25,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-03-19 10:36:25,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 274. [2022-03-19 10:36:25,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 172 states have (on average 1.0872093023255813) internal successors, (187), 176 states have internal predecessors, (187), 61 states have call successors, (61), 41 states have call predecessors, (61), 40 states have return successors, (60), 56 states have call predecessors, (60), 60 states have call successors, (60) [2022-03-19 10:36:25,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 308 transitions. [2022-03-19 10:36:25,420 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 308 transitions. Word has length 128 [2022-03-19 10:36:25,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:36:25,420 INFO L478 AbstractCegarLoop]: Abstraction has 274 states and 308 transitions. [2022-03-19 10:36:25,420 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-19 10:36:25,420 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 308 transitions. [2022-03-19 10:36:25,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-19 10:36:25,421 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:36:25,421 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:36:25,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-19 10:36:25,624 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-19 10:36:25,625 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:36:25,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:36:25,625 INFO L85 PathProgramCache]: Analyzing trace with hash 2092224394, now seen corresponding path program 47 times [2022-03-19 10:36:25,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:36:25,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1858794660] [2022-03-19 10:36:25,625 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:36:25,625 INFO L85 PathProgramCache]: Analyzing trace with hash 2092224394, now seen corresponding path program 48 times [2022-03-19 10:36:25,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:36:25,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441923463] [2022-03-19 10:36:25,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:36:25,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:36:25,630 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:36:25,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [491571400] [2022-03-19 10:36:25,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:36:25,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:36:25,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:36:25,631 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:36:25,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-19 10:36:25,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 10:36:25,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:36:25,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-19 10:36:25,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:36:25,834 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 176 proven. 18 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2022-03-19 10:36:25,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:36:26,001 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 135 proven. 8 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-03-19 10:36:26,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:36:26,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441923463] [2022-03-19 10:36:26,002 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:36:26,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491571400] [2022-03-19 10:36:26,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491571400] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:36:26,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:36:26,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-03-19 10:36:26,002 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:36:26,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1858794660] [2022-03-19 10:36:26,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1858794660] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:36:26,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:36:26,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 10:36:26,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544987971] [2022-03-19 10:36:26,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:36:26,003 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 10:36:26,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:36:26,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 10:36:26,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-19 10:36:26,003 INFO L87 Difference]: Start difference. First operand 274 states and 308 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-19 10:36:26,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:36:26,717 INFO L93 Difference]: Finished difference Result 274 states and 308 transitions. [2022-03-19 10:36:26,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 10:36:26,718 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 128 [2022-03-19 10:36:26,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:36:26,718 INFO L225 Difference]: With dead ends: 274 [2022-03-19 10:36:26,718 INFO L226 Difference]: Without dead ends: 0 [2022-03-19 10:36:26,719 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 241 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-19 10:36:26,719 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 11 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 10:36:26,720 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 177 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 53 Invalid, 0 Unknown, 7 Unchecked, 0.6s Time] [2022-03-19 10:36:26,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-19 10:36:26,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-19 10:36:26,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-19 10:36:26,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-19 10:36:26,723 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 128 [2022-03-19 10:36:26,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:36:26,723 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-19 10:36:26,723 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-19 10:36:26,723 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-19 10:36:26,723 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-19 10:36:26,725 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-19 10:36:26,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-19 10:36:26,942 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-19 10:36:26,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.